Click Here -> Please Consider Making a PayPal Contribution to the FordSix Forum!
2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe, broncr, Phase3, 68Flareside240, bmbm40,
mustang6, WorldChampGramp, justintendo, BigBlue94, ags290, motorsickle1130, Rooster, ousooner919, ethanperry
rzcrisis, DoctorC, jamyers, Motorboy, fastpat, Silverback280, chad


<<< New Site Update >>>

Search found 19 matches

by Stonebreaker
Wed May 09, 2018 3:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Has anyone broken a 95-96 hyper piston?
Replies: 4
Views: 928

Re: Has anyone broken a 95-96 hyper piston?

No forced induction or nitrous for this motor . Im even gonna keep the stock injectors this time, I think they supply enough fuel for what im doing, since the goal is low rpm torque and it will probably never see 3500 rpms the way I drive it. So i feel alot better that I can depend on this motor fo...
by Stonebreaker
Wed May 09, 2018 2:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 467
Views: 58224

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

2.) So then what are the options for exhaust? Just full out custom? That may drive some people away. I don't consider this a minor detail, and am surprised to have not seen it discussed. My headers are 1.5" primaries and 2.5" 3 into 1 collectors. 2.5" downpipes into a 3" single ...
by Stonebreaker
Tue Apr 24, 2018 7:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: What operating rpm can a 300ci. hold safely?
Replies: 25
Views: 3164

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

When you increase the fastener size, are you increasing the torque spec too? Yes. Normal torque specs are usually from SAE tables such as this one: http://www.engineershandbook.com/Tables/torque.htm . It's only when somebody has unusual threads that they have a custom torque spec, like the modern t...
by Stonebreaker
Fri Apr 20, 2018 3:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: What operating rpm can a 300ci. hold safely?
Replies: 25
Views: 3164

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

I’ll take a stab at this. I was once told the combustion chambers see roughly a ten times the number you get from a compression check ( this cold be totally bogus) (could have been a hundred times?) 15,000 psi? maybe you meant 1,500 psi? I usually see 120 to 160 psi when doing a compression check, ...
by Stonebreaker
Thu Apr 12, 2018 7:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 467
Views: 58224

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

The backside of the valve face acts like an exit venturii - similar to the downstream side of a carb (below the boosters). If it gets too far away that effect is diminished. Also, as the valve gets closer to the bore wall - depending on the head design - some flow is restricted. That's what gives h...
by Stonebreaker
Wed Apr 11, 2018 11:31 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 467
Views: 58224

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

What’s unique about this particular LS intake port we have chosen is it’s very unusual ability to maintain +300 cfm flow numbers all the way up to .800 lift which is where we stopped our flow testing. Thanks for the kind words, Gramps. Question: I've always wondered, why does a port's flow decrease...
by Stonebreaker
Mon Apr 09, 2018 3:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 467
Views: 58224

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 Stonebreaker
Thu Mar 08, 2018 1:54 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: What cam with a supercharger
Replies: 9
Views: 2334

Re: What cam with a supercharger

Hey Falcon, just out of curiosity, what is the intended purpose of this build? Street, autocross, drag?
by Stonebreaker
Thu Mar 08, 2018 11:16 am
Forum: Turbo, Supercharger, and Nitrous
Topic: Noob to nitrous
Replies: 7
Views: 2080

Re: Noob to nitrous

#1 thing for nitrous is to realize that nitrous is the most expensive type of forced induction. Not in hardware, but in cost over time. An 80 cubic foot cylinder of nitrous will only last you a couple of minutes more or less, depending on how big your shot is. Far cheaper to go with a supercharger o...
by Stonebreaker
Thu Mar 08, 2018 10:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 I6 EFI performance upgrades
Replies: 277
Views: 51443

Re: 300 I6 EFI performance upgrades

+1 on the spend a little more now or pay big later philosophy. Drag racers have a saying - Cheap, Fast, Reliable - pick any two.
by Stonebreaker
Wed Mar 07, 2018 2:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fly wheel weight
Replies: 5
Views: 1708

Re: Fly wheel weight

I don't think adding flywheel weight is going to get you much for the effort. All you're doing is storing a small amount of energy to get you moving in the first six inches. After you come off idle, more weight on the flywheel becomes an energy drag as you accelerate. A more effective strategy is to...
by Stonebreaker
Mon Mar 05, 2018 8:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: DIY Crossflow Head
Replies: 8
Views: 1516

Re: DIY Crossflow Head

Hey Gramps, This is the coolest mod I've ever seen, bar none. I would love to hear what you had to go through to make this head work. I have a community college associate's degree in redneck engineering... but this is Ph.D. stuff. Beyond Ph.D. Any car club in the world would stand up and salute - fr...
by Stonebreaker
Mon Mar 05, 2018 8:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 dies under load idles rough
Replies: 30
Views: 4142

Re: 240 dies under load idles rough

The thing to do is to be systematic in your troubleshooting. You've been working on the spark, finish going through the entire electrical system until you're getting a reliable spark at the plugs - check for frayed wiring, check your coil, check your alternator, etc. Then start on your air. Is your ...
by Stonebreaker
Mon Mar 05, 2018 2:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: DIY Crossflow Head
Replies: 8
Views: 1516

Re: DIY Crossflow Head

worken2much wrote:Not sure if you are aware that "Gramps" is Bruce Sizemore. That is his cyl head from days gone by featured in the article.

Thanks for posting the link though, great stuff.

Worken2much

I sort of wondered based on a couple of posts I came across in the forums.
by Stonebreaker
Mon Mar 05, 2018 12:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: DIY Crossflow Head
Replies: 8
Views: 1516

Re: DIY Crossflow Head

They must have killed the hotlink. Luckily I downloaded a copy. I wonder what Gramps thinks of this?


HowToModV8HeadsToSix.jpg
by Stonebreaker
Fri Mar 02, 2018 11:39 am
Forum: 240-300 "Big Block" Six Performance
Topic: DIY Crossflow Head
Replies: 8
Views: 1516

DIY Crossflow Head

Image
by Stonebreaker
Fri Mar 02, 2018 8:52 am
Forum: 240-300 "Big Block" Six Performance
Topic: weighed my 300 engine today..
Replies: 15
Views: 9089

Re:

American Thunder wrote: " As far as I know, a 289/302 complete, weighs about 550 lbs. " Engine weight chart: http://www.35pickup.com/mulligan/weight.txt Weights are always a bit edgy to quote, but I think the 289/302 is closer to 450-470lbs. The 351W with factory iron manifolds is around ...
by Stonebreaker
Thu Mar 01, 2018 3:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Advancing the cam
Replies: 9
Views: 1490

Re: Advancing the cam

Got my new cam and here is the specs .567 lift 306 dur 110 lobe center 107 centerline. Now the company told me to adavance it 3 degrees now i got a cloyes gear set. That has 4 degree adv and retard. But no 3 degree. Now will it hurt my cam and if i adavance it at 4 degrees to get 111. or is there a...
by Stonebreaker
Thu Mar 01, 2018 3:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 467
Views: 58224

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

The only reasonably available performance intake manifold for the "U" head is the Offenhauser single 4 bbl "C" manifold. What other intake manifold types would everyone like to see made available for both the "U" head and the crossflow head? Dual and triple carb intake...