Is this good for a 500FWHP LT1?

350 LT1 Block Bored And Honed (030) To 383 Notched For Clearance
Clevite Cam And Main Bearings
JA Forged Pistons (11.8-1)
Eagle Connecting Rods 6.0
Scat Crank
Ported And Polished LT1 Heads Gasket Matched
Resurfaced Heads (010)
Zero Decked
Three Angle Valve Job
1.6 Crane Rocker Arms
Crane Dual Valve Springs With Shims
CC306 Camshaft (230/245 - 1.6RR=544/577 total lift)
(Hardened) Push Rods
Ported Intake Manifold Gasket Matched
52MM Throttle Body
Accel 36# Injectors
Walbro 255 Fuel Pump
Accel 300+ Ignition
Dynospark Distributor
Balanced Engine Assembly
Extra Volume Oil Pump (20%)
PCM For Less Custom ECM
Hooker Headers
Underdrive
A/C Delete
160Thermo
Ram air-cold air

 

No.

Rich

 

For starters ditch the gasket matching, thats a quick way to a ****ty combo. Get your heads professionally ported by someone who does a lot of LT1 heads ,like lloyd or AI. Secondly with a high volume pump your need a higher volume pan as well, Either go with a canton pan designed for high volume pumps or stick with standard volume high pressure pump. and the last bit from me you're gonna need more than 36 lb injectors to feed 500 hp, look at at least 39# injectors.

 

Depends on wether you are talking rear wheel, flywheel, flywheel with ZERO accessories.

Might make 500 flywheel with zero accessories then again A LOT of LT1 do but they are not tested like that.

One popular engine vendor has a 520hp longblock known to only put 370-390 down through an A4. He is honest, just no accessories not even a waterpump, dyno headers rather than something that fits a car, tune could be such that it would self destruct under the load of a car.

That said I think you need to do more research on your combo, several part there I see that I would rather not see.

 

I was hoping for 500 at the motor, not at the wheels. I know I would need way beyond what I mentioned for that. I thought what I had would put me in the "neighborhood"...

 

With Ai 200cc or LE3 heads, 12.5 to 1 compression, more cam, 42 lb injectors and a 58mm throttlebody It will make it no sweat. You need a custom grind cam.

I dont see where what you have, properly assembled and tuned wont get very close to 500 FWHP, it is a 383.


David

 

basically people are making very close to 500FWHP with just heads and cam even more so with a stick. if you consider a 410rwhp a4 car is making around 512FWHP with a 25% drive train loss most well done and thought out H/C car get 410rwhp. also get rid of the scat crank and pick up something like a compstar it might cost more but will be well worth it when balancing. you figure you pay $600 a budget forged crank and then pay 100-200+ in balancing.

 

People that says 500 hp and means fwhp, normally run "3/4" race cams too.

I thought everyone used RWHP as the prime way to talk HP

 

There is no where near 25% hp loss in an A4 drivetrain unless there is a very loose, non lock-up converter, The motor is question doesn't have enough head/intake flow, compression, or cam to make 500hp. At least not IMHO. YMMV.

Rich

 

I know i think stock its around 20-22% i used 25% as the extreme case say if using a big stall and a 12 bolt or 9".

In reality out of all the parts listed almost none make power. the a/c delete is good for a few the cam is ok but small for a 383 and the headers and RR are about the only other things. What would be best if he went into detail about the heads who will be porting them and such what trans- gears, stall, the 52mm TB is a waste go with 58. the 36# injectors would probably be ok but can go bigger. 11-8 compression is that what these pistons are rated at with a SBC 383 with 64cc head chambers or did you calculate it. if that just there rating expect to be well over 12 with lt1 heads milled and a decked block. Also should look at the DCR.

Best advice to give would be to throw away that whole list and start over. do some research first and check out other peoples set-up if you want 450RWHP ask the people who have made it questions.

 

OUCH! Man, you make it seem like I'm a deaf and blind mute trying to walk across an imaginary bridge inside a tunnel that isnt there. I did do some research with guys making between 4 and 500HP. I'd like to direct your comment to them to see what they say...

 

There are lot of 500hp NA LT1's out there, to judge by what you read on the net. Funny, you don't see many of them on the dyno. It takes better heads than the typical ported LT1 castings, a better intake than the LT1 with a larger throttle body than is used with an LT1 manifold.

And so on. Look at the LS series heads and compare the flow to worked over OEM LT1 castings. There ARE plenty of LS based engines in this range because the heads are so much better.

Rich

 

If you are talking engines then it's crank horsepower.

I'll have to agree with Rich on this thread. 500 crank horsepower might not be do-able with the heads you describe. I think a pretty good set of ported heads would be required for 500 crank HP. That 306 cam has shown to make very good power though. So if your heads are handled by a known good porter then you'll have the 500hp (at the crank).

25% drivetrain loss is realistic on some cars. Maybe the F-body is more like 20% with an automatic. I figure 25% drivetrain loss on an Impala SS.

Karl

 

ditch those heads and cam and go with the LE3 heads with a LE4 cam, or the AI 200cc combo.

 

That would be a lot more like it. There are a lot of little things that make hp, but the heads, intake, and cam are where all the air has to come from. If the airflow isn't there, the power will not be either.

Rich