Thread: 454 combo?

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Started to do my homework and this is what I've come up with so far... Gmpp block (short) assuming a 0 deck height (with a 4.250 crank, is that possible/likely?)...
for rotating assy, scat p/n SCA-1-42450BE, using 6.135'' forged H beam rods, 4.250 forged crank,
pistons are KB p/n UEM-KB224-STD, which is a hypereutectic flat top 3cc relief piston,
heads are AFR-2010 heads, rec. intake ports at 357cc, round exhaust ports at 124cc, heart shaped 121 cc chamber, .750 max lift.
power adder weiand 8-71 p/n WND-7186 roots super charger
SCR with this at the 0 deck and a .038 head gasket is 8.55.
will this setup work? anyone with a desktop dyno for a guess at some numbers?
What should I look at for a carb (pair) cam and stall converter for this setup? (going into a 67' cutlass approx 3400lbs, 3.73 gear ratio on either a th 350 or turbo 400) Thanks for the advice and direction guys
V/R
ET3

head s are abit big for street use only ? how much boost are you going to make? for the money i would move up to a SRP flat top piston. i would used a 6.385 H beam rod.i have done the 6.135 rods 4.250 cranks engines when i do a low buck builds with hyper pistons but if you want to go internal balance go 6.385 rod helps to go to the longer rod if you go internal balance.for a hard load the 6.385 rod may help some. for cams i have used solid and hyd rollers for blower builds. the block will not be at O deck less you mill it .you may want to get the added 1/4 key way in the crank and damper if you spinning the 871 as for the cr i have used more cr up to 10to1 so the 8.55 will be fine .if your looking for big numbers on hp i would use all forged bottom end it is not going to be much more if money is low you may get a way with a cast steel crank but i would still move up to a srp piston.i have use hyper piston s in one blower build .but i would not use a KB hyper piston in a blower build

well pat I do appreciate this input, considering the amount of strip vs. street use this car will be getting ive decided to scale down to a 325 intake 114cc heart shape head. im going to attempt 12ish pounds of boost, srp flat top, p/n SRP-142979... I was hoping to get something in a 4.250 bore but using the 4.250 crank with 385 rods keeps putting me with a 030 over piston, any reccomendations (im assuming to just punch it out) the block is going to the machinest for magnaflux, wash, decking, cam berings and core plugs anywayse so might as well chalk up a cyl bore also... and as far as the $$ issue, its alwase a little low but im deploying here shortly which equates to a lot of saved money on only having comp. ins. no gas to and from work, and then theres the haz duty and tax free extras... this is something i want to put on paper now, get the bottom end here, machine it, then oil it up, and bag it until i return... so any inputs on 'upgrads' or reccomendations are greatly appreciated. Thanks for the help pat.
Doug

just got back from firing up a 4.280 by 4.250 with 6.385 with solid roller cam my grind .has the 335 cnc heads it sounds very good .i would say it may not be to far from what you want? i used the comp star callies crank had the 1/4 key way cut at callies used the SRP flat tops and the competition rpm H beam rods this should take 10+ of boost EZ

Just a quick note----if running a big blower, you really don't need a lot of cylinder head--just on the exhaust side, and the BBC has a pretty good exit if you don't screw up the headers

definitely get the extra crank keyway

Originally Posted by jerry clayton

Just a quick note----if running a big blower, you really don't need a lot of cylinder head--just on the exhaust side, and the BBC has a pretty good exit if you don't screw up the headers

definitely get the extra crank keyway

yes they do not but hell if he has the $$$ why not

Exhaust runners are at 124cc's... and im going with the aftermarket for the heads because this is just a block im working with, no parts with it at all... and gmpp wants almost as much for a set of their heads as afr wants for these fully assembled ones... and as pat mentioned, the $$$ will be there when i leave so why not...yes pat that sounds exactly like the one i want to put together, if you get any #'s off the motor (as far as tq or hp) please let me know what you come up with.

no numbers on the engine it will never see a dyno. but looks very good on paper tested 4 cam s this one make more of every thing HP and TQ the guy will never use all the engine but i can give you the cam numbers if you want to run the cam thru a desk top dyno like i said it is my cam i came up for him .i can have one ground for you it s a 4/7 swap solid roller just pm me if you want. i know what my new 556 blower engine cam is going to be

mmmm...556 cubic inches...