500rwhp Possible?
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Instructor
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500rwhp Possible?
Anyone know if it's possible to get close to 480-500 rwhp N/A on a somewhat streetable LTx? I'm thinking a 396 with solid roller/big cam, compression ratio in the 11's, AFR 215 heads, race/100+ octane tune, etc..... or the like???
Large Impressive Member
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From: Good health is merely the slowest possible rate at which one can die
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It's certainly possible. How truly streetable it might be would be a subjective matter depending on what someone considers streetable.
Melting Slicks
Joined: Mar 1999
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From: Rochester NY
For the LTX stroker motor to make 480-500rwhp. You goona need a 240+ duration @.05 and a hair over .600 lift. Also you would need a 220cc heads that flow in the 300+cfm and a 12:5 c/r
Phil Tobin used to post here few yrs ago. His 93 LT1 401ci stroker solid roller cam 242/242 @.05 .600+ lift and AFR 220cc heads with additional port work. And a 12.5 c/r . 3" B&B exhaust with long tube header. This car run on pump gas and drove to work daily and also run in the 10s @128mph in the 1/4 mile. His latest dyno were exactly 500rwhp
Phil Tobin used to post here few yrs ago. His 93 LT1 401ci stroker solid roller cam 242/242 @.05 .600+ lift and AFR 220cc heads with additional port work. And a 12.5 c/r . 3" B&B exhaust with long tube header. This car run on pump gas and drove to work daily and also run in the 10s @128mph in the 1/4 mile. His latest dyno were exactly 500rwhp
Thread Starter
Instructor
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awesome!......I've heard of well ported 210 afr's and lt4's flowing over 300 cfm as well.....12.5 might be a little high for me, though, If I ever do the build....I'm looking to be able to throw some nitrous in on top of it all.
Last edited by YellowFvr1; Feb 11, 2006 at 04:32 PM.
Burning Brakes
Joined: Apr 2005
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From: JUPITER FLORIDA
Originally Posted by Bruce
For the LTX stroker motor to make 480-500rwhp. You goona need a 240+ duration @.05 and a hair over .600 lift. Also you would need a 220cc heads that flow in the 300+cfm and a 12:5 c/r
Phil Tobin used to post here few yrs ago. His 93 LT1 401ci stroker solid roller cam 242/242 @.05 .600+ lift and AFR 220cc heads with additional port work. And a 12.5 c/r . 3" B&B exhaust with long tube header. This car run on pump gas and drove to work daily and also run in the 10s @128mph in the 1/4 mile. His latest dyno were exactly 500rwhp
Phil Tobin used to post here few yrs ago. His 93 LT1 401ci stroker solid roller cam 242/242 @.05 .600+ lift and AFR 220cc heads with additional port work. And a 12.5 c/r . 3" B&B exhaust with long tube header. This car run on pump gas and drove to work daily and also run in the 10s @128mph in the 1/4 mile. His latest dyno were exactly 500rwhp
Former Vendor
Joined: Jun 2001
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From: St Marys PA
Originally Posted by YellowFvr1
Anyone know if it's possible to get close to 480-500 rwhp N/A on a somewhat streetable LTx? I'm thinking a 396 with solid roller/big cam, compression ratio in the 11's, AFR 215 heads, race/100+ octane tune, etc..... or the like???
You can do it, but it will require some RPMs to produce the power and it will not be very streetable. 500rwhp is about 600hp at the crank, and your getting into big stroke motor combo power. Don't get me wrong it can be done, but again its going to be a maintenence nightmare.
I would look for something with more inches, in an aftermarket block to achieve what your looking to do. 400+ CI motors are more than capable of making those numbers, but will need to be still put together pretty good to make those numbers.
Thread Starter
Instructor
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yeah 475 rwhp wouldn't be too shabby of a goal if I just stayed with a well built 396 and 11 or less compression.......end goal is for 700+ rwhp on nitrous, but I'd rather not go bigger on nitrous than a 250 shot total (dual stage).
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Bench Racer
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From: Palm Beach Gardens FL
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Originally Posted by Bruce
...Phil Tobin used to post here few yrs ago. His 93 LT1 401ci stroker solid roller cam 242/242 @.05 .600+ lift and AFR 220cc heads with additional port work. And a 12.5 c/r . 3" B&B exhaust with long tube header. This car run on pump gas and drove to work daily and also run in the 10s @128mph in the 1/4 mile. His latest dyno were exactly 500rwhp
Le Mans Master
Joined: Apr 2000
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From: Manassas VA
If I was going to try to go 500+ hp on a LT series engine and streetable I would look at adding a blower.
But as stated above, streetable is a very subjective thing. In my mind, if it wont pass emissions its not streetable. At least around here.
But as stated above, streetable is a very subjective thing. In my mind, if it wont pass emissions its not streetable. At least around here.
Le Mans Master
Joined: Jul 1999
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From: Phoenix AZ
Well, I'm at 466 RWHP right now with my 383 LT4, and that's with a hydraulic cam, with some better headers and 1.65 shaft rockers I should be able to get up to 480 RWHP pretty easily...here was my last dyno;
Melting Slicks
Joined: Nov 2000
Posts: 2,469
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From: Winchester Ontario
That's on a Mustang dyno too. Ever thought of hitting a dynojet for comparable numbers, since everyone seems to compare the dynojet numbers.
Any guesses as to what a dynojet would read it at? Since I've heard about Mustang dynos reading like 8-10 % less than dynojet, that 466.5 would seem like 500 + rwhp already.
Any guesses as to what a dynojet would read it at? Since I've heard about Mustang dynos reading like 8-10 % less than dynojet, that 466.5 would seem like 500 + rwhp already.
Le Mans Master
Joined: Jul 1999
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From: Phoenix AZ
If you want the best top-end you can get for an LTx engine then you should look into the AFR 215CC rasied runner heads, they flow just a little over when I'm currently running right out of the box, and can probably be made to go around 340CFM on the intake side. The only downside to them is that you'll need a custom intake made up to work with them...
I haven't been on a dynojet since I got the car tuned...it'll probably be a while until I get on another one too! I've done about 30+ dyno runs getting the engine to where it is, so I'm just going to take a break for a bit. There's still a lot left in the engine though, and I've got some more plans for it!
I haven't been on a dynojet since I got the car tuned...it'll probably be a while until I get on another one too! I've done about 30+ dyno runs getting the engine to where it is, so I'm just going to take a break for a bit. There's still a lot left in the engine though, and I've got some more plans for it!
Racer
Joined: Dec 2003
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From: Double Oak TX
Originally Posted by Bruce
For the LTX stroker motor to make 480-500rwhp. You goona need a 240+ duration @.05 and a hair over .600 lift. Also you would need a 220cc heads that flow in the 300+cfm and a 12:5 c/r
Phil Tobin used to post here few yrs ago. His 93 LT1 401ci stroker solid roller cam 242/242 @.05 .600+ lift and AFR 220cc heads with additional port work. And a 12.5 c/r . 3" B&B exhaust with long tube header. This car run on pump gas and drove to work daily and also run in the 10s @128mph in the 1/4 mile. His latest dyno were exactly 500rwhp
Phil Tobin used to post here few yrs ago. His 93 LT1 401ci stroker solid roller cam 242/242 @.05 .600+ lift and AFR 220cc heads with additional port work. And a 12.5 c/r . 3" B&B exhaust with long tube header. This car run on pump gas and drove to work daily and also run in the 10s @128mph in the 1/4 mile. His latest dyno were exactly 500rwhp
Very good drivability but a lot of tricks like friction coating/thermo coating, welded n ported intake, etc.
Sheet metal intake being tweaked and new headers in the works. If not 500 rwhp........close enough. Easier said than done as it taken a lot of trial and error to get it to where it's at now.