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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

Search found 316 matches

by guhfluh
Thu Jan 10, 2019 2:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next step for more HP?
Replies: 22
Views: 501

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: 7599

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: 365

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: 25
Views: 1001

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: 22
Views: 501

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: 22
Views: 501

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: 22
Views: 501

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: 473

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: 185

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: 51
Views: 2325

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: 612

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: 2337

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: 370
Views: 29900

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: 1015

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: 7
Views: 913

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: 410

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: 410

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: 1104

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: 680

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: 1061

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: 1061

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: 1047

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...
by guhfluh
Sun Sep 30, 2018 3:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing set opinion
Replies: 12
Views: 615

Re: Timing set opinion

Last I saw posted, the Cloyes adjustable set was still available, despite the rumors that it wasnt.
by guhfluh
Sun Sep 30, 2018 2:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: DYNO DAY 13-14 lbs 509 ft/lbs
Replies: 19
Views: 1061

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

Any pictures of the build? I'm suprised a stock clutch can handle that torque! What wastegate and actuator are you using? Stock internal I'm assuming, since you say you ported it, but curious about the actuator. I have a HE351CW on the shelf I've been really, really wanting to put on my truck and pl...
by guhfluh
Sat Sep 29, 2018 1:00 pm
Forum: Buy, Sell, or Trade - Big Six
Topic: Engine and/or Truck for sale
Replies: 7
Views: 913

Re: Engine and/or Truck for sale

Do you have any pictures of the megasquirt you have? Pictures of the board? Curious what versions and how it's built.
by guhfluh
Sat Sep 15, 2018 5:17 am
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 34
Views: 1297

Re: FiTech (or other FI systems) used with boost.

I doubt the 25psi claim until I see it proven. No MAP sensors I know of off hand limit at that pressure and FITech also claims a 2.5bar sensor, which isn't 25psi. It's either or, not both. 2.5bar is common and equal to 21psig. Both the Holley Sniper and the FITech units have the ability to change in...
by guhfluh
Sat Aug 25, 2018 7:54 am
Forum: 240-300 "Big Block" Six Performance
Topic: excessive crank case pressure
Replies: 3
Views: 300

Re: excessive crank case pressure

It still needs a crankcase vent somewhere, along with the PCV. Check and make sure it isn't plugged or blocked.
by guhfluh
Thu Aug 02, 2018 3:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 370
Views: 29900

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

I just received feedback from the owner of the previous CNC ported 300 head. The engine is in a 1977 two wheel drive pickup with a 4 speed manual trans. 1985 carb head with 2.02" intake and 1.60" exhaust, 1.6 ratio BBC roller rockers Flow Specs: Lift, I, E .100, 59, 47 .200, 113, 87 .300,...
by guhfluh
Sun Jul 29, 2018 2:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Intake change - now with pic
Replies: 7
Views: 810

Re: Intake change - now with pic

That's pretty neat. I'm curious why you chose that route over a different manifold? For the question about rattling, you need to check both the timing and the air/fuel ratio AT the RPM AND vacuum the noise is occurring. You could quite possibly be cruising much leaner now with the settings on this c...
by guhfluh
Sun Jul 29, 2018 11:20 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 370
Views: 29900

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

I'm sure it's here somewhere but at what depression are these heads being flowed at? I'm trying to crunch some numbers. And while all this progress is great, I'm having a hard time getting the static compression below 9-1 with that chamber volume. All good and great for n/a however for forced induc...
by guhfluh
Fri Jul 27, 2018 7:49 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1995 Exhaust Donut
Replies: 3
Views: 324

Re: 1995 Exhaust Donut

There is a ball and socket type flange at each manifold. The ball end is made as a part of the manifold. There is no gasket. I wish there was a gasket, as I have a leak at the connection of my rear manifold from corosion pitting of the casting. I have thought about having them machined flat and addi...
by guhfluh
Fri Jul 27, 2018 7:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Intake manifold build
Replies: 17
Views: 1361

Re: Intake manifold build

If you set the intakes by firing order 1,5,3 on one carb and 6,2,4 on the other, one carb will see peak flow during #5 cylinder intake stroke and the other during #2 intake stroke with a total intake duration near 600 degrees of crankshaft revolution for each carb and nothing for the remaining 120 ...
by guhfluh
Mon Jul 23, 2018 10:20 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: turbo 200 build
Replies: 135
Views: 15646

Re: turbo 200 build

Checking for the correct sensor scaling is pretty easy. You just connect to the ECU with your laptop or touchscreen and pull up the current sensor readings. With the ECU powered up, but the engine not running, compare the current barometric reading for your area at that time (Google on a phone works...
by guhfluh
Sun Jul 22, 2018 7:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 370
Views: 29900

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

This leaves me thinking a higher flowing head vs what I have may be more fitting for me, but then again it's speculation and assumption, etc. so I just don't know. What rear wheel horsepower are you looking for? That's a hard question for me to answer. "All of it" would be my normal motto...
by guhfluh
Sun Jul 22, 2018 1:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 370
Views: 29900

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

Thanks for the updates as always, Gramps! I don't want it to sound pessimistic, but I'm not sure this S/S head would be much of a benefit to me in my application with flow in the 220cfm range. It's all speculation, calculation and bench racing, but with my current stock valve home ported head I've m...
by guhfluh
Fri Jul 20, 2018 3:37 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: turbo 200 build
Replies: 135
Views: 15646

Re: turbo 200 build

Did you run any boost during the short trip? I did get it into boost briefly - about 4psi - not long enough to tell how the car runs. My tuning session did not go well - the guy that's helping me tune the car is on a tight schedule so we didn't have a lot of time. Right off the bat my fuel pressure...
by guhfluh
Mon Jul 16, 2018 10:18 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Wastegate Location
Replies: 21
Views: 1254

Re: Wastegate Location

The location isn't ideal, but I have seen similar locations in log manifolds work fine, even at high horsepower, as long as it flows enough to prevent creep. Right above the outlet flange would be best if you have enough area, but I've also seen the "sloppy mechanics" way of mounting on th...
by guhfluh
Mon Jul 16, 2018 10:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing quandry
Replies: 18
Views: 901

Re: Timing quandry

Um....check the timing?
by guhfluh
Wed Jul 04, 2018 11:02 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent Flow Fix IDEAS Welcomed
Replies: 15
Views: 1230

Re: Permanent Flow Fix IDEAS Welcomed

A valve cover spacer is already offered by one of this forums authorized vendor advertisers for this website shown at the top of the revolving ad banner on the Home Page. Well, evidently the site's advertising for supporting vendors is lacking. I never knew there was such a section and had to go se...
by guhfluh
Tue Jul 03, 2018 12:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent Flow Fix IDEAS Welcomed
Replies: 15
Views: 1230

Re: Permanent Flow Fix IDEAS Welcomed

I think offering rocker stud machining/tapping is a good idea, but along those lines it could be assumed roller rockers would be run and valve cover clearance comes to mind. Therefore, I'd think a valve cover spacer or extended cover would be a good offering. If someone is using the U-flow head with...
by guhfluh
Mon Jun 18, 2018 9:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 100k 4.9 freshen up advice please.
Replies: 9
Views: 860

Re: 100k 4.9 freshen up advice please.

Seen you post on Facebook. ;)

I'd keep it simple. Hyper pistons, metric ring set, new stock bearings, new stock pump, stock cam and metal gear degreed in, swap studs, add a gasket and a freshened stock head. No need for more on a driver.
by guhfluh
Sun May 20, 2018 1:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 370
Views: 29900

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.
by guhfluh
Sun Apr 29, 2018 4:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Street 300 L6 Motor
Replies: 229
Views: 27466

Re: Street 300 L6 Motor

My idle seems to be a little more stable with ported and vary rpm less with A/C kick on or temp but it's hard to tell. Manifold vac and idle needs less choke quicker, and idle is smoother with no lope. It's no difference at all in driving. I keep it on ported for the lope at idle.
by guhfluh
Sun Apr 29, 2018 4:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 rebuild project
Replies: 212
Views: 16077

Re: 300 rebuild project

I'd go grey on the engine and black chrome on the accessories.

The Apha TIG is supposed to be real nice for the money also.
by guhfluh
Sun Apr 29, 2018 4:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 370
Views: 29900

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

Not that I want the price to be north of 3 digits for anything, but just a FYI for those wondering prices on things, I had a quote for CNC porting and larger valves on my stock head that was over $1200.00. I ended up staying with stock valves and only mildly porting it myself. Sure, porting and valv...
by guhfluh
Fri Apr 06, 2018 9:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 370
Views: 29900

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

Thanks for the update Bruce! I am one that does not care about the head origin. I completely understand the reasoning behind using it. I do not care for much Chebby stuff, but I am far from a brand loyalist and give credit where it is due for each manufacturer's strengths and shortcomings. I do like...
by guhfluh
Fri Apr 06, 2018 2:40 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 rebuild project
Replies: 212
Views: 16077

Re: 300 rebuild project

Pmuller, I have a question/concern about the Crower cam quoted here. It doesn't specifically pertain to only this one, as I have seen it in almost every cam card I look at that they offer. What is going on with their .050" duration numbers vs their opening and closing points? None of them seem...
by guhfluh
Thu Apr 05, 2018 4:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 rebuild project
Replies: 212
Views: 16077

Re: 300 rebuild project

Recommend this turbo cam. https://www.dropbox.com/s/qufkzkwyxoz8or9/Crower%20Cam.jpg?dl=0 It is very important that the cam is installed with the intake lobe center at 110* ATDC. Want to keep the compression low because of the early closing intake valve of the turbo cam. The KB S3117H heavy duty pi...
by guhfluh
Tue Apr 03, 2018 6:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 370
Views: 29900

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

I have to say, I am drooling more and more with every new update! I want it all! Unfortunately, I don't know if I'll ever be able to afford it all and I doubt I'd ever be able to use the race oriented parts, but I've dreamt of every part mentioned so far in this thread. Up to date aluminum cross flo...

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