Zturd

iTrader: (12)

I've searched through the 408 sticky and searched the forum and seen alot of results with mixed cam sizes,heads,intakes,transmission etc. I'd like to see how far off the pedastal i am with wanting those #'s. I'll give the specs of my build in a moment here. Just curious of others specs and their results. I see plenty of them in the 510-525rwhp range. Using a dynojet myself this is my setup.

2000 FRC corvette driveline 6spd, 4.10 rear
410ci (4.040 borex4.00in stroke x6.125 rod length i believe that is)
Iron block 6.0L
Callies dragon slayer crank
Callies Compstar rods
Callies main caps
ARP main bolts,rod bolts,head studs etc etc etc
Diamond flat top -2cc
Pat G cam- 247/251-624/624-112+4 installed at 108 ICL per pat G.
TFS 235 CNC heads milled .026 to get a 66cc chamber
.040 cometic head gaskets with the piston at .000-020 out of the hole getting compression ratio to approx 11.82:1
Fast 90mm intake ported to approx 91.5mm
LS2 90mm Tb ported and polished
American racing 1 7/8 longtubes, off road 3in xpipe, SLP loudmouth catback
Powerbond 25% underdrive pulley
38lb injectors
Meizere Elec waterpump

I want 550rwhp/500rwtq

Jason 98 TA

iTrader: (4)

It's defiantely doable. We recently did a PRC 237cc 418 combo that made right at 675flywheel horsepower. I have no doubt that shortly the PRC 237cc head will be making 550rwhp 408s common place. The TFS head is also a very good head, I fully expect it's capable of making 550rwhp.

03 BUSA

iTrader: (25)

You might not hit the torque number but I can def see 550 hp with that setup.

jcoker

iTrader: (17)

I made 550 with a 427 smaller cam, less compression, stock water pump, and in a camaro. I think your good.

Ryne @ CMS

iTrader: (10)

back in 05 i had a 408 with afr 225's , 12:1 compression and a cammotion 257-266 cam in my 04 z06 it i made 551-501 tq, but it wasnt for the faint of heart to say the least

GrannySShifting

iTrader: (10)

Made 500 thru Th400 drivelines a few times, definitely 550 on a Dynojet all day long

Your setup should make it or near

98camaroLS1M6

iTrader: (35)

When's it going on the dyno? I'd like to see ya hit 550, but being realistic I'd say 530-540rwhp/480-490rwtq. I hope you make more. Who's tuning it?

grimloc3

iTrader: (1)

I dont see you having a problem hitting the 550 mark. Thats what i make and our setups are very similiar. The only thing i have on you is a bigger cam
257/264 .619/.612 113 +2
But you have more than enough to make up for that with the electric water pump, more cubes and the 235's vs my 225's.

VINCE

iTrader: (1)

Futral Motorsports built me a 408ci with 6.0L heads and a FMS custom cam with 11.8:1 compression many years ago. I think 2003 or 2004. I made 563rwhp/518rwtq in my 2001 Camaro and the same motor went into my 99 FRC and it made 555rwhp/520rwtq with one cutout open. We made a cam change and it should have made more power in the Vette, but only one cutout opened. Here is the dynosheet from back then. I also provided a local mustang dyno of the car with both cutouts working properly.. You can do the math since mustang dyno's dyno lower than dynojets.

VINCE

iTrader: (1)

Just an FYI!! Futrul Motorsports built the motor for nitrous. This was on a 125 dry shot coming on at 4krpm using a nitrous controller..



This next one was after Supra's started catching up on our 40 to 160mph sprints.. As you can see the tq spike was brutal and kept spinning on the dyno. This was a dual stage nitrous setup using the same nitrous controller. The goal was to try and keep the tq below 750rwtq for traction. In the end I actually put down 840rwhp and over 950rwtq with the combo spraying a HUGE dual dry shot. I lost that dynosheet due to Coastals Mustang dyno computer crashing and I never got a copy. I did that just for shiznits and giggles. I could never put that down to the ground. Hell I was never able to put down the one stage. I just got greedy.. That FMS408ci was just nasty!!! I just wish the fast 90 intake could take as much nitrous as the motor.. LOL!!

Automag928

Yes it was!! and I still have the video of that runnin around somewhere...

jeremym

iTrader: (3)

I make 558rwhp 515rwtq with a 414 and TFS 235 heads.

98camaroLS1M6

iTrader: (35)

what's your mod list?

383ss

iTrader: (14)

mine made ~550/515 through an M6/12bolt with a 246/250 FMS cam and heads that flowed 286 @ 600

12.8:1 compression

9secondsflat

i would think that is a slam dunk easy...i make 532/473 with a 383...your going to have more cubes, bigger heads (runner), bigger cam, a tad higher compression....i think your combo will provide you the results your seeking if not more...

VINCE

iTrader: (1)

Did I mention my over 550rwhp NA dyno #'s were done on FMS 6.0L heads? I would think the new FMS heads could produce even bigger #'s..

camarokid94

iTrader: (2)

how streetable are all these 550 12+:1 motors? my old azz little 502hp 490tq 402 is a dream to drive. but if yours are all still "streetable" runnin on pump gas, mine runs great on 91, then id love to do some tricks to hit some more HP as well.

racer7088

We've done many many 550+ rwhp 408s and the guy on top should be there with what he has as long as he has good exhaust and a good tuner easy. The streetabilty is mostly the cam and tuner because obviously the bigger the cam the crazier it gets. The 600+ rwhp stuff is much crazier but with a good speed density tune some are shockingly drivable but only one tuner I know can make that stuff nice. Bigger engines with LS7 style heads can be very nice and easy driving makeing over 600 rwhp.

9secondsflat

keep in mind that if you get bad gas (ie bad 93) you will ping...i have had low end ping and or rattle after filling up at various pumps...that is the down side to having a c/r in the mid to upper 11's...the cure is to make certain you always have a few gallons of gt 100 or higher unleaded at home just to toss in and fix the issue.

racer7088

Yes I agree big time. I never build anything with more than about 11.3 to one and we don't have those problems. Most of our stuff is 11-11.25 or so on true pump gas.