Intake Swap on Stroker?

[lead69]

[I did a compression check and got between 170-180 on all cylinders, which is close to Hughe's calculations (see below).]

That is interesting,I have compression tested engines with a true 10.75 static and a relatively small cam (224 @.050) and they ran around 185 cylinder pressure (carb wide open plugs pulled ect.).Im assembling a 408 for a friend this next month and it will be running 9.5 static and a comp xs282,I will be very curious to see what it tests at.

 

[intimidator]

Intimidator, this guy only has around 8.5 compression so the race gas aint gonna help him, don't ya think? :read2:

Yes I agree with regular race fuel but the VP113 as opposed to C12 or C14, burns much faster because it is oxygenated and burns more like street pump gas. Every motor I have tried this in from a 9.5 to 1 440 with a 950 Hp Holley to my 392 Stroker with 13 to 1 and a 950 hp Holley has picked up ET and MPH. As much as 2 tenths and 2 mph. A dyno person I talked to about this fuel said that the least power he has made on a dyno with VP113 is 20 Hp. He also said it does not need a lot of timing, sometimes less but the motors quence controls the timing. The tighter the quence distance up to about 40 thousands the faster the fuel burns.

 

[410 valiant]

Your weekest link is headers. Hooker 1 3/4 are the cheapest ,then TTIs , then Hedmans. The biggest change in my stroker was going to bigger tubes period. I dropped 2 tenths. You have to remember these things think they are big blocks and I would guess 1 5/8 headers might flow less thn bigblock stock manifolds. Don't be afraid to put a bigger carb either. I am starting to see 1050s on these motors now.