Hi could someone give me an estimated HP increase on the following:

Old combo- 460 block bored 030
balanced/shot-peened bottom end
D3VE open chamber heads with std valves
Crane sat night special hydraulic cam .580"lift
std hydraulic rockers
Torker 2 manifold
1050cfm alky dominator
dragster headers
ET 9.64 @ 139mph
HP=420 in 1670pd car

New combo- same bottom end bar windage tray and bronco sump
procomp aluminium heads 340cfm in 225cfm out closed
chamber 74cc
stainless race valves
solid cam .640lift
roller rockers
same manifold and carb and headers

 

need duration specs on the cams, and piston crown specs on the pistons before a hp guesstimate could be made... also the procomp heads suck out of the box... they need serious porting and a good valve job to flow worth crap. even with porting you can outdo them with ported iron- they suck that bad. also, the d3ve heads are closed chamber heads... the only 385 series ford head that was open chamber was the d2ve head... and those are very detonation prone because of the lack of a quench pad (open chamber design)
oh, and an edelbrock victor would be a better choice for intake for the new cam.

 

Duration at 0.015 tappet lift is 306
Pistons are 10cc dome hypereutectic
Cheers for advice on procomps now getting performer rpm's I think

 

id go with the trick flow street heads... they flow much better than the edelbrocks out of the box, and ported flow even better... with ported trick flows, victor intake, and a good solid roller cam you could have 750 horse easy... maybe 800... but youd need to upgrade to some h-beam rods for that kind of power.

 

there some budget and time restrictions as the coming season is only 2.5 months away so I just wanted to get a combo together before then. Not sure who sells TFS in Australia.

 

you might want to stop by www.460ford.com and ask questions there... im sure theres a forum vendor there that would ship to australia.

 

The heads will net you at least 100 horse.

 

Dare I say I just purchased some E performer CJ heads #61649 at a reasonable price.

 

not really... theyll give you a hundred horse or so more potential, but the rest of the combo has to match the heads for you to ever see it. youll only make as much power as the lowest performing part will allow... so you could have a 545 stroker with trick flow street heads, victor intake, 1050 cfm carb, but using the stock cam, and youll only see about 350-375 horse. take the same combo but change the cam to a big custom solid roller, and you could make 800 horse.
change the heads to d3ve heads just modified enough to use the valve springs for the big roller cam, and youre back down to around 450 horse... in the first scenario the cam was the restriction... second was a pretty well matched combo... and the third the heads were the restriction... it all depends on what the restriction is what power gains youll see. if you leave the biggest restriction there and change everything else, it still wont make much more power.

 

Having said that if a torker 2 manifold were to be the lowest performing part in the equation what would the HP be approx?

 

BTW getting figures from reincarnation website (great site) for the heads they should allow up to 706hp. the bottom end may only be good up to 7000rpm as will the cam which is a solid 640"lift w/rollers. So the only thing I could think of would be the manifold. The headers are 2 1/4 into 4" collectors.

 

Too much carb and cam.

 

did I mention it was in a 1600lbs dragster with a 4500 stall C6 with transbrake

 

Ok, He is going from a 96cc combustion chamber to a 74cc along with 2.08 1.66 valves to a 2.25 or 2.29 intake along with a 1.72 or 1.76ex. The head swap will net him 2 points in compression (which will be a 7% increase), along with the 60+cfm on both sides.(which using a theoretical formula nets 15 horsepower per cylinder). I see nearly a 120 to 140 horsepower increase with said supporting mods. I am begining to remember why I have been a member here for so long but never post.

 

you should get a victor intake... i bet youd see a good 50 hp increase with that intake vs the torker 2 on the new setup... if youre using the edelbrock heads without porting them, they wont perform much better than the ported d3ve's (assuming they were properly ported). if you properly ported the edelbrocks- with the victor, the new cam, and the rest of the combo id say 550 hp... with the torker probably 500
sorry boggin... just looked up the edelbrock part number... i thought they were the 95cc heads but theyre the 75cc... leaves you with 13.7-1 compression from just shy of 11-1... better be recurving your distributor, running 110+ octane race gas or alcohol, and may as well add about 50 horse to each... around 600 horse with the victor and 550 with the torker