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2018 Contributors:
StarDiero75, curts56, DannyG, B RON CO, wsa111, Captainslow42, falconcritter
Econoline, THE FRENCHTOWN FLYER, 95FordFleetside, turbo6, Max_Effort, WorldChampGramp
cr_bobcat, C.S.Designs, pmuller9, gus91326, rwbrooks50, rocklord, drag-200stang, Big64my79Effie, CNC-Dude, gb500

2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe, broncr, Phase3, 68Flareside240, bmbm40,
mustang6, WorldChampGramp, justintendo, BigBlue94, ags290, motorsickle1130, Rooster, ousooner919, ethanperry

Unknown->> M.Ketterer, T.Smith, J.Myers, P.McIntire - Please PM me (1966Mustang) and lemme know who you are!

Search found 344 matches

by guhfluh
Wed Apr 10, 2019 8:13 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Bolt-on supercharger 200 six
Replies: 15
Views: 1800

Re: Bolt-on supercharger 200 six

I'd like to be able to control timing but haven't found how. apparently, the Sniper can't control a Duraspark. Any suggestions on fuel injection or timing control are welcome. That is correct. The Sniper does not put out a zero crossing signal used by the Duraspark box. It does supply a square wave...
by guhfluh
Tue Apr 09, 2019 8:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Hedman vs EFI headers
Replies: 23
Views: 712

Re: Hedman vs EFI headers

Just a note that if it helps with your plumbing for the Turbo mount, you can use a front EFI manifold on the rear cylinders with a little modification. This raises the rear outlet so the turbo connections might be shorter. https://i.imgur.com/mWgS737h.jpg I've seen mention of doing that somewhere e...
by guhfluh
Tue Apr 09, 2019 8:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Hedman vs EFI headers
Replies: 23
Views: 712

Re: Hedman vs EFI headers

sandboxer wrote:I’m going to open up the EFI a bit by a 16th all around. That will assure there’s no overhang into the port.

Such is what I've done with mine.
by guhfluh
Fri Mar 29, 2019 9:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 mods update
Replies: 23
Views: 577

Re: 240 mods update

No real adaptation required with a 2 piece. Bolt the slip yoke to the u-joint. I had my front shafts shortened, but shouldn't have. I measured wrong and had it cut down before the trans was installed. I would have been better leaving it.
by guhfluh
Mon Mar 25, 2019 10:47 am
Forum: 240-300 "Big Block" Six Performance
Topic: Tractor Puller
Replies: 137
Views: 13107

Re: Tractor Puller

Nice looking work :) I've been curious, is there not enough meat in the block for 4 bolt style or splayed main caps to be built? Or also building a bedplate style girdle that ties into the pan rail as well? I'm sure it's an expensive venture only needed at top tier, but I've never seen anyone do any...
by guhfluh
Mon Mar 25, 2019 10:41 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 mods update
Replies: 23
Views: 577

Re: 240 mods update

This process has been fun to see what each mod does. In reality, the few times a year that I towed the fishing boat doesn’t justify expensive upgrades, however the mods suggested on this site have been relatively inexpensive and have helped. The 1968 f100 will now be towing our 3200 lb. pontoon boa...
by guhfluh
Sun Mar 24, 2019 8:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 mods update
Replies: 23
Views: 577

Re: 240 mods update

FTF.... did you have the T170 cast iron trans? I want to thank all the guys who encouraged me to work with my 240 and all the advice given. Yours years of knowledge are greatly appreciated!! Uh...I think so? It was the one that looked like your typical Top-loader performance 4-speed with an iron ca...
by guhfluh
Sat Mar 16, 2019 3:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Swap done, engine cranks, no full power stroke
Replies: 45
Views: 922

Re: Swap done, engine cranks, no full power stroke

I second checking compression. The rockers may just be too tight.

Once compression is checked, you can move on.
by guhfluh
Sat Mar 16, 2019 3:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 31
Views: 1266

Re: Next step for more HP?

Here's what happened to my 85 engine, shortly after hopping it up. block never opened since my grandfather bought it factory. Had about 60k miles when I pulled it out. Never pulled the pistons but it had low compression on this cylinder and one more. I don't think stock pistons and rings are up to ...
by guhfluh
Thu Mar 14, 2019 11:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Searching for Builds / Combos
Replies: 46
Views: 2980

Re: Searching for Builds / Combos

I would have guessed 38* was too much. Was there a difference between that and the 32* on the dyno? Not that can be definitively determined. I "lost" 20hp with less timing, but also a different carb and I believe the rockers were stock also(maybe not, but can't remember), but also a diffe...
by guhfluh
Thu Mar 14, 2019 1:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Clutch Options
Replies: 8
Views: 277

Re: Clutch Options

From what I remember, a late model F250 or F150 11" diaphragm should work fine and have a better pedal than an earlier finger style. I swapped my 11" finger style for a newer diaphragm style 10" looking for less chatter. I still have chatter, but the 10" still holds the heck I pu...
by guhfluh
Thu Mar 14, 2019 12:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Searching for Builds / Combos
Replies: 46
Views: 2980

Re: Searching for Builds / Combos

We need others to report their combinations also. I went first to get the thread going. Suprised I never commented. My basic build list is in my signature, minus the Chevy 250 1.75 rockers, 38*@3800rpm timing, and Holley 600. The head is home ported also, and the manifolds "matched" for n...
by guhfluh
Thu Mar 14, 2019 12:07 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: turbo 200 build
Replies: 142
Views: 18720

Re: turbo 200 build

67Straightsix Any Updates? I know the weather has prevented many from doing very much. Yes, the rain has put a damper (haha) on things. Since my last post I've taken it out for three 40 mile test drives to work out the kinks. My impressions so far; from idle to 1500 rpm it drives like a dog - from ...
by guhfluh
Tue Mar 12, 2019 7:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rebuilding 240
Replies: 42
Views: 1597

Re: Rebuilding 240

Pulling the clip isn't required.

Bad blowby from the breather isn't going to be the valves, it's going to be pistons, rings, bore, etc.
by guhfluh
Tue Mar 12, 2019 6:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rebuilding 240
Replies: 42
Views: 1597

Re: Rebuilding 240

Something is still wrong with those numbers. 60psi cranking is barely enough to run, if at all. A Briggs has more. These trucks never came with a shroud for the 6cyls, unless you opted for A/C or HD cooling package, and even then I'm not sure it really was an option until the 70's. I have yet to see...
by guhfluh
Tue Mar 12, 2019 4:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 433
Views: 40649

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

Many have mentioned cost and how it's so expensive, blah blah blah. I just ran across an example or "comparison" of what you pay for porting a FORD 240/300 head WITHOUT THE HEAD factored into the price. YOU HAVE TO SUPPLY THE HEAD. Assembled with springs, retainers, guides, valves, PC seal...
by guhfluh
Tue Mar 05, 2019 3:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 433
Views: 40649

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

For what it's worth, I have shared this thread and info on Facebook in the recent past for those who may be interested there and don't browse forums. There isn't much by the way of Ford 300 performance groups on Facebook though.
by guhfluh
Sat Feb 23, 2019 7:21 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Boost reference mechanical fuel pump
Replies: 5
Views: 222

Re: Boost reference mechanical fuel pump

I know people have boost referenced the mechanical fuel pump, but I cannot see It being a good idea...Not sure about the combo pump you have, but on a regular fuel pump there is no seal between the diaphragm rod and the bushing bearing...You will suck oil air out of the crankcase under vacuum and i...
by guhfluh
Sat Feb 23, 2019 6:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 332
Views: 36300

Re: Street 300 L6 Motor

I don't think you understood my point. Both studs would require shims. The original studs, shims to lower the rocker as you needed. The latter, shims to raise the poly lock. Both scenarios use shims in the same location, just for different end results, but it is accomplishing the same thing. It is ...
by guhfluh
Wed Feb 20, 2019 11:59 am
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 332
Views: 36300

Re: Street 300 L6 Motor

guhfluh -- Because my boss towers were not milled the extra .100" I need the roller rockers to be as low as possible. As you raise the rocker it moves the center pattern on the valve stem more towards the outside. I am still working with different posh rod lengths to get everything centered. T...
by guhfluh
Tue Feb 19, 2019 1:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 332
Views: 36300

Re: Street 300 L6 Motor

If you need a shim under the poly lock with the "new" studs anyway, why not use the original studs and shim the rockers lower as needed? A hardened ground .100" washer available in the right ID/OD? I like the benefit of a shoulder much better, both for flex of the stud and potential c...
by guhfluh
Mon Feb 11, 2019 10:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Chevy rockers zddp requirements
Replies: 1
Views: 434

Re: Chevy rockers zddp requirements

Rockers don't change anything. ZDDP still needed for the cam and rockers.
by guhfluh
Sun Feb 10, 2019 11:30 am
Forum: 240-300 "Big Block" Six Performance
Topic: Please help me build the ultimate 300 for an F600
Replies: 68
Views: 2334

Re: Please help me build the ulitmate 300 for an F600

the motor was the ford reman and its already 40 over.. so its a boat anchor.. Sometimes you win sometimes you lose.. in this case I paid 150.00 for the motor and the only parts really usable are the rods.. the head.. the pulleys.. and maybe the transmission if I can sell it... a NP435 with PTO ..bu...
by guhfluh
Sat Feb 09, 2019 3:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 332
Views: 36300

Re: Street 300 L6 Motor

Junk or not doesn't have anything to do with the self aligning design. Many rockers are designed the same way from reputable manufacturers. Some have "washers" in a larger OD than the roller on either side of the roller tip to keep the rocker aligned on the valve tip. They too need to be m...
by guhfluh
Sat Feb 09, 2019 10:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 332
Views: 36300

Re: Street 300 L6 Motor

The tips of the rockers are what self align on the valve stem tips. The tangs overhang either side of the stem and the stem tips need to be long enough for the tangs to miss the retainers...or the tangs shortened.
by guhfluh
Sat Feb 09, 2019 10:43 am
Forum: Turbo, Supercharger, and Nitrous
Topic: Do i need a blow off valve on my paxton supercharger?
Replies: 16
Views: 1673

Re: Do i need a blow off valve on my paxton supercharger?

The Atomic TBI has a MAP (Manifold Absolute Pressure) sensor not a MAF (Mass Air Flow) sensor so the location of the BOV in the hat is OK. There are only 5 target A/F ratios you get to enter into the system. Idle, Cruise, WOT, Nitrous and Boost. You are correct, outside of those 5 fuel control para...
by guhfluh
Tue Jan 29, 2019 2:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 332
Views: 36300

Re: Street 300 L6 Motor

Thanks as always for the additional information, I do not have the new hydraulic lifters, was going to wait until I had all the measurements done, but now that I know what your Crane units are I will order a set that will be 2" long & .300" top edge to bottom of pushrod cup. As I don'...
by guhfluh
Tue Jan 29, 2019 2:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: about self guided rockers
Replies: 15
Views: 826

Re: about self guided rockers

The guy with the rear mounted turbo 300 truck used self guided roller rockers for a 409 chebby on his build. I'm guessing for the 3/8" stud mounts. They are rollers though. Scorpion and Pro Comp come to mind, but memory's failing.
by guhfluh
Thu Jan 10, 2019 2:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 31
Views: 1266

Re: Next step for more HP?

Here's what happened to my 85 engine, shortly after hopping it up. block never opened since my grandfather bought it factory. Had about 60k miles when I pulled it out. Never pulled the pistons but it had low compression on this cylinder and one more. I don't think stock pistons and rings are up to ...
by guhfluh
Wed Jan 09, 2019 6:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Low Performance Offenhauser Dual Plane
Replies: 32
Views: 8262

Re: Low performance offenhausen duel plane

Why is this still a stickied post? Just curious.
by guhfluh
Wed Jan 09, 2019 6:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: I bought a used zf5-42 for my 1984 f-150
Replies: 21
Views: 795

Re: I bought a used zf5-42 for my 1984 f-150

Though it seems most info is posted here and those are transmissions behind 300 6cyls, it *is* the wrong forum section for it. I'm not sure if there is much traffic in the truck section on this site, but there does seem to be a decent amount on FordTruckEnthusiast website, if you want to try posting...
by guhfluh
Wed Jan 09, 2019 4:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: catalog of conceptual build plans for the b.b.ford sticky
Replies: 31
Views: 2544

Re: catalog of conceptual build plans for the b.b.ford sticky

I am currently searching for a list of options for screw in rocker studs for a carb head. I have seen mention of many different ones, some requiring milling the stud bosses and some not, but it's hard to sort through and pinpoint what works. I'd like to find a simple combination that works with just...
by guhfluh
Wed Jan 09, 2019 4:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 31
Views: 1266

Re: Next step for more HP?

Ok so here's what I'm hearing so far from pmuller9 and jason832: Pistons (Yes, I'm willing to do that), Cam, Head P&P. Considering I'm looking to get off the line quick and maybe spin the tires a little and I never go over 65-70ish in this truck, what cam and pistons would you guys suggest? inv...
by guhfluh
Wed Jan 09, 2019 3:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 31
Views: 1266

Re: Next step for more HP?

Harte3 wrote: You might consider beefing up the C6 transmission with some modifications for improved performance to get the most out of the mods in engine performance. Don't know anything about transmissions, what would you suggest? I was thinking about swapping to an AOD at some point, but that's ...
by guhfluh
Tue Jan 08, 2019 11:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 31
Views: 1266

Re: Next step for more HP?

I'd keep the stock pistons for now if they're okay. Upgrade when needed. I spin my 85 bottom to 5k all the time. In a lighter truck and a better ratio 5spd, it'd be fun. For now, if you're planning on staying carb, invest in a wideband and learn to tune the carb well. Invest in a vacuum gauge and ha...
by guhfluh
Fri Jan 04, 2019 11:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Reduce Displacement
Replies: 18
Views: 762

Re: Reduce Displacement

I want to use a roller cam and roller rockers... :)
by guhfluh
Thu Jan 03, 2019 5:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Another interesting aluminum LS head build with some pictures
Replies: 0
Views: 310

Another interesting aluminum LS head build with some pictures

http://www.performanceforums.com/forums/showthread.php?67295389-Ford-Inline-6-Drag-Monster Unfortunately it doesn't look like the project was ever finished. Seems like it turned out to be too big of a project and goals were too big. I wish he'd have just focused on the head and it probably could hav...
by guhfluh
Thu Nov 29, 2018 10:16 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: F-250 super cab 4x4 300 Turbo
Replies: 52
Views: 3335

Re: F-250 super cab 4x4 300 Turbo

Turbo Cam suggestion: https://www.dropbox.com/s/qufkzkwyxoz8or9/Crower%20Cam.jpg?dl=0 I may have asked before, but I do not understand Crower's calculations on their cam cards at all. Does this cam have any overlap at .050" tappet or not? The use of a minus symbol and using ATDC vs BTDC throws...
by guhfluh
Thu Nov 29, 2018 8:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Points distributors?
Replies: 25
Views: 964

Re: Points distributors?

Just convert to magneto! :D
by guhfluh
Thu Nov 29, 2018 8:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 79
Views: 3279

Re: Carb head combustion chamber question.

The lope went away with an EFI intake and aftermarket (Megasquirt) fuel management. That is very interesting, and not surprising I guess. So with today's electronically controlled everything (traction control, ride control, engine management control, ABS, creature comfort controls, etc.) how long w...
by guhfluh
Mon Nov 26, 2018 11:37 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 433
Views: 40649

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

JR u-flow efi head with 1.84 intake 1.6 ex. - These are the final CFM flow numbers, no further improvements are anticipated For SR u-flow efi head with 1.94 intake 1.6 ex. - These are the final CFM flow numbers no further improvements are anticipated, HOWEVER remaining wall thickness will have to b...
by guhfluh
Thu Nov 22, 2018 5:02 pm
Forum: Fuel Injection - Mega Squirt
Topic: Home made 36-1 trigger wheel
Replies: 16
Views: 1593

Re: Home made 36-1 trigger wheel

The bottom does not need to be a sharp radius with a tall tooth, especially with a hall sensor.
by guhfluh
Wed Nov 14, 2018 4:04 pm
Forum: Buy, Sell, or Trade - Big Six
Topic: Engine and/or Truck for sale
Replies: 12
Views: 1411

Re: Engine and/or Truck for sale

Still interested in the MS
by guhfluh
Wed Nov 14, 2018 3:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fluttering Fuel Pressure gauge when FPR vacuum disconnected
Replies: 3
Views: 504

Re: Fluttering Fuel Pressure gauge when FPR vacuum disconnected

Yes, test the fuel pump and regulator with the engine not running, aka off.
by guhfluh
Mon Nov 05, 2018 10:27 am
Forum: 240-300 "Big Block" Six Performance
Topic: Fluttering Fuel Pressure gauge when FPR vacuum disconnected
Replies: 3
Views: 504

Re: Fluttering Fuel Pressure gauge when FPR vacuum disconnected

I wouldn't get hung up on it being 40psi running with vacuum connected. That sounds about right with vacuum and the gauge probably isn't perfectly accurate. Without the vacuum, it should be higher and closer to the 50-60psi spec. You can also test it without the engine running, with the fuel pump on...
by guhfluh
Sun Nov 04, 2018 2:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Mysterious Radical Race Engine
Replies: 10
Views: 1310

Re: Mysterious Radical Race Engine

I was going to post the second video, but saw it in here. I was thinking of changing the name to "6 piece Cleveland headed 300 six", or similar that should get more interest, views, talk, etc. Something I noticed that interested me is how easily it looks to run link-bar roller lifters. Mos...
by guhfluh
Sun Oct 07, 2018 12:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: cannot leave well enough alone-Fords Y pipe
Replies: 16
Views: 898

Re: cannot leave well enough alone-Fords Y pipe

Look into the MagnaFlow pipe and cat
by guhfluh
Mon Oct 01, 2018 1:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: DYNO DAY 13-14 lbs 509 ft/lbs
Replies: 19
Views: 1424

Re: DYNO DAY 13-14 lbs 509 ft/lbs

I started having the clutch slip at 6 lbs a few months back so when i pulled the motor to do timing gears i was surpirsed to find someone had already upgraded to the 11 inch disk but it was about worn out. Looking thru my used stuff, i found that a 2006 mustang gt pressure plate matched the flywhee...
by guhfluh
Mon Oct 01, 2018 12:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: DYNO DAY 13-14 lbs 509 ft/lbs
Replies: 19
Views: 1424

Re: DYNO DAY 13-14 lbs 509 ft/lbs

I wonder if your valve springs are giving up That or the multiple flow restrictions im against still. Stock throttle body, log ex manifold, and the poor flow of the head. I think thats my hp plane out Log manifold? Which one? I'm sure it's a multitude of things. Stock cam, stock cam advanced, stock...
by guhfluh
Sun Sep 30, 2018 3:34 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo 300 '67 Stang
Replies: 24
Views: 1714

Re: Turbo 300 '67 Stang

Being a light car, the TKO and an 8.8 should hold up fine. The TKOS aren't known for high RPM shifting smoothness that actually goes in the 300s favor. You'll want a clutch big enough to handle the torque is the only possible weak link I see, if you're using a Mustang bellhousing that doesn't accept...

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