can a 402 do over 500 rwhp?
can a 402 do over 500 rwhp? can a 402 do over 500 rwhp with a ton of torque? im trying to decide and staying na or go with an ati on a stock ls1. id prefer na.(maybee with a hundred shot on top 
) the car is a 02 camaro m6, mostly driven on the street with light to light runs and some spirited moments on the highway.any suggestions?
) the car is a 02 camaro m6, mostly driven on the street with light to light runs and some spirited moments on the highway.any suggestions? why would a vette make less power then a camaro w/a 402ci? the rapid 402 did make 553hp,but it was on a 10bolt w/342 gears,electric water pump things like that that gives more hp#'s. a 12bolt w/some gear will take 20hp off that # real quick. i'm looking at rapid for my new motor build up this winter.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Originally Posted by mike c.
98Z28 COBRA KILLER-does your 402 have bad driveability? what were the #'s on your 402ci?
that we have had to deal with for the last few days here in South Florida.I am saying that you can put a blower on a stock long block with a stock cam (drivability) thru some opened up intake and exhaust and run 500 rwhp no problem.
402 with a good sized cam (say a 240/248 or so), afr 225's or an etp equivalent, fast 90/90, 1 7/8th kooks will get you there. I say go 402 as you can hit 500 rwhp on a stock internal ls1 but even with a real good tune and fuel system you will eventually need to get a forged 346 to up the boost, so then you looking at $6000 for the ds1c with the 8 rib setup and then another $3600+ for a forged 346/347 short block, then a set of good heads, etc...My vote is for forged 402!
TECH Apprentice
Joined: Sep 2005
Posts: 370
Likes: 0
From: DFW, TX
well since i had a P1 charged '04 Z06 518/459 i would say that drive ability with the blower is not more streetable. there is a ton of unuseable power after 4k RPMS. it comes in late. also my motor blew 2k miles after the insall. IMO your stock LS1 will not last, forge your bottom end if your going to put a blower on it. Im now building a 403 with everything that will be put on it and into it we are expecting 530/490 on 93 octane. 238/.621 112 cam, 6spd, 3.42's, aluminum flywheel.
Originally Posted by black_knight
To answer the first poster:
402's ROUTINELY go over 500 RWHP. 550 is more the norm. Anyone making under 500 with a 402 has something strange going on.
402's ROUTINELY go over 500 RWHP. 550 is more the norm. Anyone making under 500 with a 402 has something strange going on.
As far as FI vs. big cubes big cam. I think that the best setup (wish I had done it) would be to get yourself into a 9:1 compression forged 402/408 with a medium cam (high 230's dur 114 LSA) and then slap a turbo on it. After all, it's only money .
. 
Originally Posted by 11 Bravo
550rwhp is in no way more the norm that 500 on a 402. Those motors that make outrageous numbers may be more visible because they get the 5 page threads in the dyno section, but the average guy building a 402 should be happy with 500, and not be dissapointed if it makes a little less than that in the real world.
And if you have less than 500rwhp with a 402, then as I said something strange is going on. Something that can and in most cases should be corrected. Again, that is with an M6 and dynojet. Show me a 402 making under 500 and I'll show you a combo that is not optimized.
Originally Posted by KAOS
not to hijack what about a 383? with all the right parts, would 500+ be a problem