383 Stroker - How much HP?
Thread Starter
Pro
Joined: Sep 2004
Posts: 652
Likes: 0
From: Katy Tx
383 Stroker - How much HP?
I am looking at potientially purchasing a 99 vert with a 383 stroker kit done by Thunder Racing. The guy selling doesn't currently have the documentation from them, but is going to get it. He said he thought it had 600 HP and close to a 1000hp with a nitrous shot. I think these numbers are quite far fetched, though I don't know what kind of numbers the car should put up. I don't know how large a shot on nitrous it is set up for, but the guy says he has never used it (bought the car with it and just keeps it in for show). But as far as a build 383, what are some numbers to expect from the car.
I understand it can probably very pretty drastically depending on exactly what is in the car, but just looking for a HP range. The car definitly doesn't have any kind of FI either.
Thanks.
I understand it can probably very pretty drastically depending on exactly what is in the car, but just looking for a HP range. The car definitly doesn't have any kind of FI either.
Thanks.
"AlohaC5" Senior Member
Joined: Jun 2003
Posts: 3,562
Likes: 44
From: Madison, AL
My C5 is at East Coast Supercharging (ECS) where they are building me a 383 stroker along with the installation of a few items to keep her cool when I'm running her hard at the track. Should be ready in 3 weeks. I will post my hp and tq numbers then. I would be very happy to see 600 HP, however, I'm not sure how realistic that is.. I hope to see 525 to 550.
Racer
Joined: Jul 2005
Posts: 290
Likes: 0
Well MTI and a few others are building some 408's and a few 422's. The 422's are seeing around 450rwhp and the rwtq is in the high 400's. So I would assume a 383 would see rwhp in the mid to high 400's. If I were you I wouldn't go with anything smaller than a 408 stroker. Check out MTI and see some of the customer rides they have built. You might be sorry if you don't............ 
Le Mans Master
Joined: Aug 2003
Posts: 7,188
Likes: 1
From: New Blue 9.80 @ 142MPH stock motor
St. Jude Donor '03-'06-'07-'08
Originally Posted by AlohaC5
My C5 is at East Coast Supercharging (ECS) where they are building me a 383 stroker along with the installation of a few items to keep her cool when I'm running her hard at the track. Should be ready in 3 weeks. I will post my hp and tq numbers then. I would be very happy to see 600 HP, however, I'm not sure how realistic that is.. I hope to see 525 to 550.
If you put in the blower pistons and have it forged then add a Novi 2000 plus the Alchy to help prevent detonation and finally depending on the heads/cam you use - you could be looking at 700+ RWHP. Of course you can do it stages and make multiple trips to ECS.
PS I forget to mention headers/fuel management system.
Le Mans Master
Joined: Jul 2002
Posts: 6,147
Likes: 32
From: Dallas TX
I think he means 600flywheel hp.
A 383 usually makes from 480-510rwhp which translates to about "600hp"
Its also possible he has it setup for a 300shot of nitrous which would be around 800rwhp meaning about 950hp.
Its not that farfetched.
A 383 usually makes from 480-510rwhp which translates to about "600hp"
Its also possible he has it setup for a 300shot of nitrous which would be around 800rwhp meaning about 950hp.
Its not that farfetched.
Le Mans Master
Joined: Jul 2002
Posts: 6,147
Likes: 32
From: Dallas TX
Originally Posted by 00'Vette
Well MTI and a few others are building some 408's and a few 422's. The 422's are seeing around 450rwhp and the rwtq is in the high 400's. So I would assume a 383 would see rwhp in the mid to high 400's. If I were you I wouldn't go with anything smaller than a 408 stroker. Check out MTI and see some of the customer rides they have built. You might be sorry if you don't............
more like 550
Racer
Joined: Jul 2005
Posts: 290
Likes: 0
Originally Posted by kumar75150
they better be making a lot more power than 450 and i think they are
more like 550
more like 550
Dude your smoking crack..........you would only see those kind of numbers from a 422 or 427! (They might be pulling them from 408's too, but I don't know!) You would be lucky to see 525 from the motor of a 383! You could put a hefty nitrous setup on a 383 motor and get ungodly numbers, but if you want 600hp from your motor alone, you will have to search for more than the 383 has to offer! Just the simple facts my freinds..............
Go to the big vendors and see what they have built for there customers! You'll see what I'm talking about!
Drifting
Joined: Apr 2005
Posts: 1,509
Likes: 1
From: Lafayette CA
I have a 382 Katech-built forged stroker, 11.6:1, 224/228 114lsa cam, stock Z06 heads, TPIS long tubes, Borla X-pipe, Corsa cat backs, stock cats, and Halltach A/F. Dyno'd at about 425rwhp and about 450rwt. So depending in the drive train loss factor used, I guess that puts it at about 500fwhp??? To get 600 I think you'd need some pretty high flowing heads and a much larger cam (which wouldn't pass smog) and bigger injectors/fuel pump. My bet is that the 600hp is a bit of an exaggeration. But I'm no expert.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Pro
Joined: Sep 2004
Posts: 652
Likes: 0
From: Katy Tx
Thanks for the info guys.
I was considering trading cars with him straight up - his is a 99 with 20K miles and all the engine work and mine is an 02 that is all but stock with 30K miles. Paint and interior wise, our cars are about identically kept. He had some damage done to his left leg and is selling cause he has a hard time with the clutch now, mine is an auto so we were talking about a swap. I was really considering it, cause the car looks great and has the stroker kit, but I am just scared of what kind of abuse it could have seen with that nitrous, etc. This guy is the 3rd owner and the 1st owner had all the work done, so I believe this guy has not abused the car, but have no idea what was done by the first two owners.
I guess in the end I will stick with what I have, it is trust worthy and I know where it has been. My wife is scared of a car with that much power also, so that isn't a plus either. I guess I am pretty much gonna stray away from the deal cause the guy really doesn't know the history of the car and I use mine as a daily driver so I need dependability. Just isn't a smart move I guess.
Thanks again.
I was considering trading cars with him straight up - his is a 99 with 20K miles and all the engine work and mine is an 02 that is all but stock with 30K miles. Paint and interior wise, our cars are about identically kept. He had some damage done to his left leg and is selling cause he has a hard time with the clutch now, mine is an auto so we were talking about a swap. I was really considering it, cause the car looks great and has the stroker kit, but I am just scared of what kind of abuse it could have seen with that nitrous, etc. This guy is the 3rd owner and the 1st owner had all the work done, so I believe this guy has not abused the car, but have no idea what was done by the first two owners.
I guess in the end I will stick with what I have, it is trust worthy and I know where it has been. My wife is scared of a car with that much power also, so that isn't a plus either. I guess I am pretty much gonna stray away from the deal cause the guy really doesn't know the history of the car and I use mine as a daily driver so I need dependability. Just isn't a smart move I guess.
Thanks again.
Former Vendor
Joined: Feb 2004
Posts: 9,615
Likes: 13
From: Burlington NC
Never say never. We built a race car that went over the pond. It made 586 to the wheels, that was 5 years ago. It was a 382 ls1 using non ZO6 heads. Not a street motor at all. It was very crazy fast and lasted 2-3 years before it's first rebuild.
Street 425-475 to the wheels, any more and they are streetable.
Randy
Street 425-475 to the wheels, any more and they are streetable.
Randy
Melting Slicks
Joined: Jul 2005
Posts: 2,734
Likes: 0
From: Vacaville California
just so you all know i have a C6 with a ls2 (366ci) making 493 rwp N/A and there is more in it for sure.... at 15% thats around 560-570hp
i think 600 at the crank is possible with a 383.
I could go with even bigger heads in my car and easily get another 15+ hp. (which i just might do)
i think 600 at the crank is possible with a 383.
I could go with even bigger heads in my car and easily get another 15+ hp. (which i just might do)
Racer
Joined: Jul 2005
Posts: 290
Likes: 0
Originally Posted by rmitchell242
just so you all know i have a C6 with a ls2 (366ci) making 493 rwp N/A and there is more in it for sure.... at 15% thats around 560-570hp
i think 600 at the crank is possible with a 383.
I could go with even bigger heads in my car and easily get another 15+ hp. (which i just might do)
i think 600 at the crank is possible with a 383.
I could go with even bigger heads in my car and easily get another 15+ hp. (which i just might do)
Well ****........maybe with the technology they have out now and the efficiancy of these motors.......it is possible.
How streetable do you think it would be the 383 would be? I was planning on having a 408 or something like that built and hoping for around 500-550rwhp N/A and then throwing a 200-250shot on it for the drag strip visits 
. Thats a ways off though.
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
Originally Posted by rmitchell242
just so you all know i have a C6 with a ls2 (366ci) making 493 rwp N/A and there is more in it for sure.... at 15% thats around 560-570hp
i think 600 at the crank is possible with a 383.
I could go with even bigger heads in my car and easily get another 15+ hp. (which i just might do)
i think 600 at the crank is possible with a 383.
I could go with even bigger heads in my car and easily get another 15+ hp. (which i just might do)