Search found 71 matches

by WorldChampGramp
Tue May 22, 2018 4:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

One more point for consideration, the scribe lines in the pic above are from mounting the head on a a std 4.00 bore 300 block then scribed with block upside down on an engine stand (from the bottom). Gramps
by WorldChampGramp
Sun May 20, 2018 2:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Great news and update as always! The only thing that comes to mind if not offered complete, is still machined for clearance to achieve the valve lifts needed and maybe positive seals while there. Guhfluh: Yes on the valve lift with an out of the box target of .550 max for the as received #1U head t...
by WorldChampGramp
Sun May 20, 2018 11:27 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Progress Report from Gramps; We have acquired all the new and used cylinder heads necessary to proceed with all three (3) programs outlined elsewhere in this thread. Our first priority is the street/strip U-Head, now dubbed (1U) all reasonable design alternatives have been fully explored as to the f...
by WorldChampGramp
Tue May 08, 2018 12:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged crank
Replies: 15
Views: 413

Re: Forged crank

Attached is a copy of the email confirmation (somewhat redacted ala Congressional undersite) that I received for this order placed in February.
OOPS forgot to attach email:

300 Forged Crank Order OOPS.pdf
by WorldChampGramp
Tue May 08, 2018 12:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged crank
Replies: 15
Views: 413

Re: Forged crank

IT’s Gramps chiming in. The old 'Caveat Emptor' applies as I recently purchased a re-man crank from this same company. Great packaging, crank finish is very good but much to my chagrin and disappointment the crank I received thru Rock Auto Parts in a Crankshaft Supply box with their Logo and part # ...
by WorldChampGramp
Sun May 06, 2018 7:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Bruce, I'm more interested in a stage II U-Flow head as the rules that I'm basing the build of my car dictates the use of a factory cast iron head.But will be watching with anticipation of the developement of all 3 of the performance head platforms. Your comments and preference are dully noted. Som...
by WorldChampGramp
Tue May 01, 2018 8:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

For Clarity this is a 3-fold effort 1-New U-Head mild porting seat/throat work with adequate flow to make at least 250HP on pump gas 2-New Max Flow U-Head target maximum HP 425+ NOT on pump gas at higher HP capability 3-New Fabricated Aluminum Cross Flow with exceptional intake and exhaust flow to m...
by WorldChampGramp
Tue May 01, 2018 1:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

FYI, the Edelbrock 4.0 Jeep head is $1700 at 1 of the resellers AND it's a street head, not a race head. Plus the reality is they need to make a profit in order to continue to create more goodies. I only see the eddy 4.0 jeep heads at like 3000+... where did you see 1700? I received a PM today rega...
by WorldChampGramp
Sat Apr 28, 2018 10:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

arse_sidewards wrote:So with regards to pricing how many digits will be to the left of the decimal place?


For the bolt on crossflow 4 digits and BTW our development costs for the combined projects to date just crossed the magic 5 digit to the left of the decimal place 10K mark. :!: :bang:
by WorldChampGramp
Sat Apr 28, 2018 12:30 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Gramps reporting in: Tomorrow I fly back from MI to FL sure beats driving solo. This was an eventful trip for me and all those involved in this exceptional opportunity of public good. Soon you will be able to purchase a USER FRIENDLY cross flow Aluminum Head at a reasonable price that will outperfor...
by WorldChampGramp
Sat Apr 21, 2018 7:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: What operating rpm can a 300ci. hold safely?
Replies: 25
Views: 911

Re: What operating rpm can a 300ci. hold safely?

1000 psi is not uncommon for a stocker. As you would expect FTF is right there with a stock 1000 psi combustion pressure number. Here are some extra facts to hopefully influence your decision making for a successful on or off road Ford Big six build. Consider this: In an engine with four inch cylin...
by WorldChampGramp
Fri Apr 20, 2018 12:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: What operating rpm can a 300ci. hold safely?
Replies: 25
Views: 911

Re: What operating rpm can a 300ci. hold safely?

My experience was limited to some Dyno testing at the E & F (Engine and Foundry) Dyno wing and my real world in the Field "see if you can break it" U-Haul fleet sales engineering experiences. For years U-Haul trucks used the 300 engine as did most of the UPS fleet. Head gasket failures...
by WorldChampGramp
Fri Apr 20, 2018 7:25 am
Forum: 240-300 "Big Block" Six Performance
Topic: What operating rpm can a 300ci. hold safely?
Replies: 25
Views: 911

Re: What operating rpm can a 300ci. hold safely?

I know it’s safe to hold the engine speed in the peak torque range. Can it hold close to peak horsepower ( 3,000 - 3,400rpm)? General answer is YES. I assume you are probably talking about operating the 300 engine in a vehicle in an over the road situation such as pulling a trailer and would like t...
by WorldChampGramp
Mon Apr 16, 2018 1:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

I have a cylinder head blueprint, but I was asked by the person that provided them not to let them be used for public consumption. There may be archives in the dungeon of Ford's black op sites that have them, that's probably where these I have originated. CNC Dude. I don't consider myself "Pub...
by WorldChampGramp
Mon Apr 16, 2018 7:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Making progress on all fronts. Sectioning of used castings for mockup almost complete. Bandsaw sectioning is unacceptable so we have purchased a new 14" Multiblade Chop saw and are in process of modifying for repeatable section to section accuracy. Changes include Retrofitting a new laser syste...
by WorldChampGramp
Thu Apr 12, 2018 2:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

OOPS Forget to give you this additional HOPE

IMG_1650.JPG
by WorldChampGramp
Thu Apr 12, 2018 2:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Very Well stated "Dr Muller": are you sure you don't have another degree in fluid dynamics? If I may there is also a 3RD very important factor to the above detailed summary. Think of it this way, let's discuss a typical almost right angle intake port (except for the inclined valve stem ang...
by WorldChampGramp
Thu Apr 12, 2018 5:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Turbof100 wrote:Gramps the head was made from two stock 806 ls1 heads and bolted to a stock block with a little preheat before welding


Turbo F100: All fabrication feedback is important to us. :thumbup: Gramps
by WorldChampGramp
Wed Apr 11, 2018 7:06 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

For the crossflow head any thought about using a pro port style head with no valve guides, and drilling for valve guides after welding to allow for proper valve guide spacing and pushrod alignment. Also interest in how the head will be fixture for welding I had some ls heads welded and the center s...
by WorldChampGramp
Tue Apr 10, 2018 8:44 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

... I wish I could resolve one stumbling block for some forum members, who have expressed their disdain over our choice of GM castings for the cross-flow masterpiece. Bruce :thumbup: :checks: That's the difference between hotrodders and racers, I guess. Different goals. Hotrodders want to look good...
by WorldChampGramp
Sun Apr 08, 2018 8:22 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Good Sunday Morning All: Had a great productive week and happy to report, we now have 3 separate sections of our mockup aluminum X-flow mounted on one of our (3) bare blocks. These individual sections have been cut from 2-used heads, then introduced to the 4-axis machining center, fixtured one-at-a-...
by WorldChampGramp
Fri Apr 06, 2018 9:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

I am encouraged by the genuine outpouring of support both on and off the Forum. We have been fortunate to have an assemblage of very talented seasoned people who are assisting this effort right here in my backyard (Ft Myers, FL). Some of you have contacted me using the PM alternative and I have resp...
by WorldChampGramp
Thu Apr 05, 2018 1:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged Crank NIB
Replies: 20
Views: 724

Re: Forged Crank NIB

Several red flags going off here that should make someone put the brakes on real quickly. The first one is you're buying a brand new crank for just $95. No doubt it is from China, which in itself isn't a tragedy, but it's much less than even a Scat or Eagle crank. Also, it probably doesn't have a v...
by WorldChampGramp
Tue Apr 03, 2018 8:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged Crank NIB
Replies: 20
Views: 724

Re: Forged Crank NIB

Likewise I was curious about these cranks several months ago and even asked Hec-tina the $64 question. Their reply to me clearly stated that the crankshafts are casting not forging like I and PMuller9 hoped. With regard to thr blocks Hec-Tina also repleied to my separate inquiry note the OXX logo re...
by WorldChampGramp
Mon Apr 02, 2018 7:37 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

I must admit it's hard to maintain our overall program focus with all the tempting off-ramp possibilities posed by Worken and "LF” so I am asking my colleague PMuller9 to chime in. Our long range plans are constantly changing and the direction we go such as a turbo safari etc remain to be seen....
by WorldChampGramp
Sun Apr 01, 2018 3:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Development Update : We had a good week (nights) and all day Saturday making progress on all 3-simultanious projects. We have decided to move the Prep H project to last position as my Michigan associates are behind with their Maverick Clone project. The most progress has been with the cross flow al...
by WorldChampGramp
Sun Apr 01, 2018 3:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

This question may have been asked in the past. With the potential of the new aluminum head, at what HP/RPM level do the block and crank become the weak link? Lunatic Fringe: It is a great question you ask. Our intent is to run every combination we can conceive of with the aluminum cross flow heads. ...
by WorldChampGramp
Sun Apr 01, 2018 2:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Gramps, Curious what the deck thickness is on the new U flow head? I assume you know what the Ford blueprint dimension is supposed to be. I can measure if need be. I've read that the new castings are thicker but, haven't seen any numbers. Thank you, Worken2much Please read my Development Update pos...
by WorldChampGramp
Fri Mar 30, 2018 7:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

While I would prefer not to use a non Ford head, the reality is that the R&D that is spent on that platform absolutely dwarfs all others combined. Given unlimited funds, our choice would be a baby Boss head. But in order to beat the V8's that we compete against, we have to use every advantage w...
by WorldChampGramp
Thu Mar 29, 2018 8:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

We choose not to comment on customer preferences I would use a Yugo head if it was the ultimate logical choice. Gramps
by WorldChampGramp
Thu Mar 29, 2018 10:24 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Wesman07: the development work e.g flow bench time & cutting up perfectly good NEW heads to see what's left before and after port work are costly and time consuming necessary tasks. My Ford experience and NHRA racing days taught me one unimpeachable lesson THERE ARE NO shortcuts to success. Be p...
by WorldChampGramp
Wed Mar 28, 2018 10:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

It is a little hard to say which head I would be interested in because all I really know is the concept and a estimated flow number. I would probably be interested in option One or Two. It would be used in a large full size 4x4 truck where bottom end power and reliability are the most important. We...
by WorldChampGramp
Wed Mar 28, 2018 11:49 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Need responses of interest in all (3) catagories of this effort. Please express here or send me a message re your opinion of what you personally might consider buying and intended useage such as circle track, tractor pull, mud slinger, street strip, or Drag Racing only or Other. #1 New u-head in con...
by WorldChampGramp
Sat Mar 24, 2018 9:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Update on the Max Flow U-Head & Aluminum Cross flow head development program. Gramps is pleased to report that we are actually ahead of schedule on both projects. Sufficient Dyno time has been purchased in advance to allow for a 2-engine build comparison of the new u-head in street port trim vs....
by WorldChampGramp
Mon Mar 19, 2018 8:14 am
Forum: 240-300 "Big Block" Six Performance
Topic: Exhaust port question.
Replies: 18
Views: 1019

Re: Exhaust port question.

Gramps Responds: We are in the process of flowing our new u-head which BTY has these thermactor provisions in the roof of the exhaust port. I totally agree with FTF it's a non- issue. HOWEVER, we will flow with and without fill and report our findings. On the real world side, I once did an unplanned...
by WorldChampGramp
Sat Mar 17, 2018 8:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1560

Re: Timing sets

Great Feedback and thanks to PMuller9 for explaining clearly what our overall objectives are. FYI the target price for processing one customer supplied crank gear with (2) additional machined keyway slots (clearly marked) including an install instruction sheet will be in the $45 range. Additional k...
by WorldChampGramp
Fri Mar 16, 2018 8:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1560

Re: Timing sets

If your going to make one, make a small batch. People will need them. It will help keep cost down, and profit in your pocket. How big that batch is, is up to your discretion The way it works is you send us just your crankshaft timing gear, tell us how many degrees you want the gear to advance (or r...
by WorldChampGramp
Fri Mar 16, 2018 8:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1560

Re: Timing sets

Great Feedback and thanks to PMuller9 for explaining clearly what our overall objectives are. FYI the target price for processing one customer supplied crank gear with (2) additional machined keyway slots (clearly marked) including an install instruction sheet will be in the $45 range. Additional ke...
by WorldChampGramp
Fri Mar 16, 2018 7:30 am
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1560

Re: Timing sets

If you send us the crank gear to cut a 4 degree advanced keyway, we will mark a different tooth that will correspond the new keyway that gets cut for the 4 degree advanced position. The will be the tooth that lines up with the dot on the cam gear when you use the new keyway. Ok cool, if you guys co...
by WorldChampGramp
Thu Mar 15, 2018 3:28 am
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1560

Re: Timing sets

Relief is only a few months away. I will soon be offering matched sets of timing gears [alum cam & steel crank] with gearsets in both 2,4 and 3,6 degree advance increments. Target price is $100 + nominal shipping cost. Any Interest? Gramps That's great news Gramps and the aluminum cam & ste...
by WorldChampGramp
Tue Mar 13, 2018 9:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1560

Re: Timing sets

Relief is only a few months away. I will soon be offering matched sets of timing gears [alum cam & steel crank] with gearsets in both 2,4 and 3,6 degree advance increments. Target price is $100 + nominal shipping cost. Any Interest? Gramps
by WorldChampGramp
Fri Mar 09, 2018 4:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: KB pistons S1147 flat tops?
Replies: 16
Views: 957

Re: KB pistons S1147 flat tops?

Unless that was a waaay early version of the prep H intake that was not on the H/MP car. Bruce's was better quality than that. I owned it at one point, along with the common plenum that bolted on to run Holleys. But it did indeed have a common mounting plate. What say you Bruce? Current PROJECTS ma...
by WorldChampGramp
Tue Mar 06, 2018 5:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 175
Views: 14237

Re: Street 300 L6 Motor

For all Chevy head bolts that went into water jackets I have always used Permatex RTV Sillicone Clear Sealer. Will this do the job for the 7/16 screw in studs or is there something better that I should try? My Personal choice is the light grey colored Permatex used in high torque applications, Item...
by WorldChampGramp
Tue Mar 06, 2018 8:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: DIY Crossflow Head
Replies: 8
Views: 532

Re: DIY Crossflow Head

Stay Tuned there are more exciting MODERN parts OLD SCHOOL thoughts coming. Gramps

Here is the 6-piece head in action and BTY the last pass I made down the 1/4 mile Labor Day 1978.
https://www.youtube.com/watch?v=3MKccurdKDQ
by WorldChampGramp
Tue Mar 06, 2018 7:40 am
Forum: big six
Topic: 240/300 parts interchangeability
Replies: 1
Views: 263

Re: 240/300 parts interchangeability

Well Done PMuller9. I trust others appreciate this compendium of well thought thru :idea: facts and suggestions. I certainly do and so does our machinist. Gramps
by WorldChampGramp
Sun Mar 04, 2018 3:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Great to hear that some of our potential 300 cylinder head clients will be circle track, tractor pull not just drag racing. It would help our cause, if some of you who have flowed your modified U-Head would post your current intake and exhaust flow numbers. Gramps
by WorldChampGramp
Sat Mar 03, 2018 2:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

In response to Wesman07 and others: Regarding camshafts for the new cross flow Sizemore head current 240-300; staggered Intake/Exhaust sequence will be used AGAIN to keep cost down so that anyone having a current camshaft that will work with a 1.7 RA ratio can try theirs FIRST without mortgaging the...
by WorldChampGramp
Sat Mar 03, 2018 2:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Re- Post by Gramps with a few corrections and improved readability Some of the information on the 240 1972 cast D2 part number Prep H head needs to be clarified. One of the original heads (that I ran and now is back in my possession)<<<[refer to the intake port pic posted by PMuller]>>has the highes...
by WorldChampGramp
Sat Mar 03, 2018 11:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Thank U for the suggestion.

Promise to use more Paragraphs in future posts.

Gramps
by WorldChampGramp
Fri Mar 02, 2018 9:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 154
Views: 6389

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Some of the information on the 240 1972 cast D2 part number Prep H head needs to be clarified. One of the original heads (that I ran and now is back in my possession)<<<[refer to the intake port pic posted by PMuller]>>has the highest intake port roof we could squeeze into a STOCK intake port. In fa...