high power N/A LT1/4 strokers
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,437
Likes: 1
From: Gainesville Fl
high power N/A LT1/4 strokers
I used the search but couldnt find exactly what i ws looking for. assuming cost wasnt a huge factor, high how of horsepower can u get a 396 or 406 to? how high can you sin cams in these motors? would it be possible to get 600hp flywheel or 500rwhp from a naturally aspirated LT1/4 motor if it had enough displacement, top of theline heads either from AFR or TrickFlow, the new edelbrock intake manifold portmatched with the heads, 1300cfm monoblade throttle body, and throw enough fuel at it? ie injectors. supposedly the new MSD optispark is making higher rpms a possibility and advanced inductions claims they have heads that can fit on an LT4 that can flow as hgh as 330cfm! is the intake gonna be your bottling factor? would you HAVE to go to a custom single plane design or could you get this power with a new edelbrock air gap LT4 intake manfold? i have seen a little bit about the Hoover car but i saw only that he ran a high ten on all motor. never saw a hp rating.
Melting Slicks
Joined: May 2007
Posts: 2,382
Likes: 2
From: Kathleen FL
I believe its entirely possible to surpass over 400 rwhp on a 383+ cubic inch stroker. Just need deeper pockets, that's all. My former budget Miniram 383 built for about 2 grand loved every bit of the big CC306 cam and Dart iron heads. I was pushing 390 rwhp before I hurt it because of a little oil pump pickup mistake...DOH!!!!!!!!! 
I think 500 rwhp is kinda pushing it. Its not impossible to do it but it demands even bigger pockets than most average people have.
I think 500 rwhp is kinda pushing it. Its not impossible to do it but it demands even bigger pockets than most average people have.
Le Mans Master
Joined: Feb 1999
Posts: 9,938
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
There have been a few guys close to 500rwhp with 396/401 LT1. The new AFR eliminators will help out allot as the heads were the limiting factor before.
I know 12 to 1 comp, Ported to hell AFR 220's and around a 700lift solid roller gave someone 480rwhp or very close to that area with an automatic in a 93 Vette
I know 12 to 1 comp, Ported to hell AFR 220's and around a 700lift solid roller gave someone 480rwhp or very close to that area with an automatic in a 93 Vette
Le Mans Master
Joined: Oct 2004
Posts: 7,706
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From: Everett WA
C4 of Year Finalist (appearance mods) 2019
You might consider checking out www.golenengineservice.com Chad has a good reputation and you can see what he lists his engines for to get some estimate of cost to HP.
Team Owner
Joined: Nov 1999
Posts: 32,782
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From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
This is why I'm looking at a LS1 for my car. An almost stock motor will produce those numbers. Lt1 are just to limited and cost to much and still can't make those numbers.
Le Mans Master
Joined: Jul 2000
Posts: 5,012
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From: OKC OK
You might want to do a couple of searches, I believe this has been discussed a lot. Anyway, you are looking at a ton of money attempting to get 500rwhp, 400-450rwhp is relatively easy. I haven’t seen anyone get there with a drivable hydraulic roller LTx motor, Denny (on this forum) is probably the closest. The only 500+ NA LTx motors that I’ve seen are high compression, big solid roller cams, aftermarket pcm, custom intakes, etc. etc. Mackey is definitely right about the LSx motors.
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
Bluewasp on here is making 440+ rwhp out of a relatively modest 383. Still using LT4 heads, not aftermarket. And a hyd roller under .600 lift on a 112 LSA.
SonnyinVA is making close to 500 rwhp with a much more radical 408 with AFRs and a solid roller.
SonnyinVA is making close to 500 rwhp with a much more radical 408 with AFRs and a solid roller.
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Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
Here's one for sale with 483 rwhp. If it's still available.
http://forums.corvetteforum.com/show....php?t=1733994
http://forums.corvetteforum.com/show....php?t=1733994
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Here's one for sale with 483 rwhp. If it's still available.
http://forums.corvetteforum.com/show....php?t=1733994
http://forums.corvetteforum.com/show....php?t=1733994
My 360 rwhp head and cam car ran that fast for alot less money.
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
My 396 makes decent power but haven't had it dyno'd again lately after a rebuild and a few more tweaks last year. It has gone 11.03@126mph in the 1/4 with the 6-speed in full street trim just drag radials. Also went a few 128mph. The car weight is around #3450 with me in it.
It drives pretty good on the street and with the auto, and got 18mpg for the 2 hour drive to Carlisle with the cruise set @75. I'm sure it would be much better with the 3.45s.
I still use LT4 castings that are profesionally done. I use a Edelbrock LT4 intake also. I expect the car to go high 10's in the fall all N/A. I break enough parts with this power level and couldn't imagine another 75-100rwhp. But I have been thinking solid roller
It drives pretty good on the street and with the auto, and got 18mpg for the 2 hour drive to Carlisle with the cruise set @75. I'm sure it would be much better with the 3.45s.
I still use LT4 castings that are profesionally done. I use a Edelbrock LT4 intake also. I expect the car to go high 10's in the fall all N/A. I break enough parts with this power level and couldn't imagine another 75-100rwhp. But I have been thinking solid roller
Last edited by RichS; Aug 30, 2007 at 07:29 AM.
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,437
Likes: 1
From: Gainesville Fl
My 396 makes decent power but haven't had it dyno'd again lately after a rebuild and a few more tweaks last year. It has gone 11.03@126mph in the 1/4 with the 6-speed in full street trim just drag radials. Also went a few 128mph. The car weight is around #3450 with me in it.
It drives pretty good on the street and with the auto, and got 18mpg for the 2 hour drive to Carlisle with the cruise set @75. I'm sure it would be much better with the 3.45s.
I still use LT4 castings that are profesionally done. I use a Edelbrock LT4 intake also. I expect the car to go high 10's in the fall all N/A. I break enough parts with this power level and couldn't imagine another 75-100rwhp. But I have been thinking solid roller
It drives pretty good on the street and with the auto, and got 18mpg for the 2 hour drive to Carlisle with the cruise set @75. I'm sure it would be much better with the 3.45s.
I still use LT4 castings that are profesionally done. I use a Edelbrock LT4 intake also. I expect the car to go high 10's in the fall all N/A. I break enough parts with this power level and couldn't imagine another 75-100rwhp. But I have been thinking solid roller
Le Mans Master
Joined: Feb 1999
Posts: 9,938
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Mine 396 is very streetable, and with 425rwhp and 3275 ran a traction/track limited 11.6's at 119's (1.7 60' times werent great) with an automatic, 2800rpm stall and 3.75 gears.
My alignment wasnt helping me at all with 60' times, and I know it would have run a little better with the rear being set up for drags. Regardless, the speed shows mid 11's, and I cant complain.
My cam is very mild, 230/236 544/555 lift.
My alignment wasnt helping me at all with 60' times, and I know it would have run a little better with the rear being set up for drags. Regardless, the speed shows mid 11's, and I cant complain.
My cam is very mild, 230/236 544/555 lift.
Melting Slicks
Joined: Jul 2004
Posts: 2,695
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From: Chicago Illinois
Is your true goal rwhp or is it your 1/4 mile times? IMOP dyno #s are just that. Track times speak much louder. How many times do you see a high hp car that cant plant that power. Ive never seen a 500 rwhp LT car!
Melting Slicks
Joined: Jul 2004
Posts: 2,695
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From: Chicago Illinois
Thats what Im talking about! You have a great combo there and still have money in your pocket! Jonescap is another guy whos 330rwhp car will be dipping into the 11s shortly.
Safety Car
Joined: May 2002
Posts: 4,659
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From: Toronto ontario
I put down 478.9 rwhp on a Mustang dyno. 388 ci NA LT4. Solid roller with <.600 lift 115 lsa.
Only track times mph was 127.8 mph.
ET definitely doesnt speak for power. ET is garbage. ET is for those to know how much you changed the suspension for grip and launch.
Only track times mph was 127.8 mph.
ET definitely doesnt speak for power. ET is garbage. ET is for those to know how much you changed the suspension for grip and launch.
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,437
Likes: 1
From: Gainesville Fl
after reading about the trans am on advanced inductions website, i am pretty impressed. looks like it is very possible to get over 500rwhp if you use high enough quality heads and a cam to match