SyTy Speed Shop
New member
Ok, i have a 90K mile Gen 6 454, i do not know for sure as i haven't torn down the short block yet, but im fairly certain it has a cast crank, 3/8 bolt forged rods and cast pistons. The rods and pistons im 100% on. The heads will keep stock valves, but everything else will be upgraded parts from Comp Cams and ARP Rocker studs and a set of 1.72 roller tip rockers since i already have them. I'm going to have some port work done to them, nothing to drastic just some clean up and port matching and bowl work, as the heads don't do to bad in stock form if the flow numbers Ive found online are accurate.
In a HotRod mag online build they took a bone stock gen 6 454 and put it on the Dyno and it made 376HP 482TQ, with a comp cams 230/236 .547 lift on a 112 LSA it made 428HP and 507TQ, this is with a Dual plane intake and Holley 750 carb. My Fuel Injection manifold and 90mm TB and 50lb injectors will match this with no problem once the tune is dialed in.
They also hot this same engine with a 150 shot of N2O and it made 530. I think with the head work and a little more cam duration, lift is pretty maxed at .550 with stock pistons i can get closer to the 500HP mark, but my real question is what would be a real world limit on the cast crank and cast pistons?
I'm also looking at running the stock cast crank, upgrading the stock rods with ARP bolts and a set of speed pro hyperutectic pistons, 4.280 with a -10.50cc dome that with the stock heads and .040 head gaskets i have will give me 10.5:1CR, which is right where id like to be, and the speed pro pistons should allow more valve lift. I can get the pistons with moly rings for 250. Am also considering a set of Scat I-Beam rods, cause after buying the ARP bolts for my stock rods and the machine work im over half way there.
While this may not be the 700HP beast i had envisioned, and Ive realized what it really takes to build that and make it durable, id like to be as close to 500HP as i can get now, and also want it to be durable and reliable. On a 468 with 10.0:1CR(110cc Chamber) and a 248/254 .560/.580 on a 110LSA hydraulic roller cam with stock 85-89 peanut port heads and only about 9.1:1CR due to the 117cc chambers it made 512HP 514TQ, so i was thinking about running a similar cam on Lunati VooDoo lobes and i know my heads will flow better so i can probably get alittle better power, maybe 520-525 and at this level, and keeping the RPM's under 6K i think the stock cast crank will be fine, plus according to the berkeley impeller chart, at 500-525HP i should be around 55-5700 max rpm.
Also if i were to get the tune dialed in and then run it in open loop and want to run water injection on the headers, whats the max duration you can run before you have to worry about reversion?
Is this is a good build plan? Will i make the power i think i will? Will this be reliable and durable?
In a HotRod mag online build they took a bone stock gen 6 454 and put it on the Dyno and it made 376HP 482TQ, with a comp cams 230/236 .547 lift on a 112 LSA it made 428HP and 507TQ, this is with a Dual plane intake and Holley 750 carb. My Fuel Injection manifold and 90mm TB and 50lb injectors will match this with no problem once the tune is dialed in.
They also hot this same engine with a 150 shot of N2O and it made 530. I think with the head work and a little more cam duration, lift is pretty maxed at .550 with stock pistons i can get closer to the 500HP mark, but my real question is what would be a real world limit on the cast crank and cast pistons?
I'm also looking at running the stock cast crank, upgrading the stock rods with ARP bolts and a set of speed pro hyperutectic pistons, 4.280 with a -10.50cc dome that with the stock heads and .040 head gaskets i have will give me 10.5:1CR, which is right where id like to be, and the speed pro pistons should allow more valve lift. I can get the pistons with moly rings for 250. Am also considering a set of Scat I-Beam rods, cause after buying the ARP bolts for my stock rods and the machine work im over half way there.
While this may not be the 700HP beast i had envisioned, and Ive realized what it really takes to build that and make it durable, id like to be as close to 500HP as i can get now, and also want it to be durable and reliable. On a 468 with 10.0:1CR(110cc Chamber) and a 248/254 .560/.580 on a 110LSA hydraulic roller cam with stock 85-89 peanut port heads and only about 9.1:1CR due to the 117cc chambers it made 512HP 514TQ, so i was thinking about running a similar cam on Lunati VooDoo lobes and i know my heads will flow better so i can probably get alittle better power, maybe 520-525 and at this level, and keeping the RPM's under 6K i think the stock cast crank will be fine, plus according to the berkeley impeller chart, at 500-525HP i should be around 55-5700 max rpm.
Also if i were to get the tune dialed in and then run it in open loop and want to run water injection on the headers, whats the max duration you can run before you have to worry about reversion?
Is this is a good build plan? Will i make the power i think i will? Will this be reliable and durable?