Turn your LT1 into the engine it wants to be.
Have an LT1, but want an LT4? GM Performance Parts has what you need. These LT1-to-LT4 conversion kits bring the most out of your factory LT1 engine. The kits include LT4 cylinder heads with valves and springs, a red aluminum LT4 intake manifold, GM Performance Parts' hot cam with 1.6:1 ratio Bow Tie roller rockers, and all necessary gaskets. The result of all of these mods is 425+ proven horsepower!

tht n how does an ls1 compare to a Lt4

 

False.. your money can be spent in other ways that would smoke that lt4 conversion.

 

Yeah, buy a better cam and valvetrain.

 

the hp # is true... flywheel... which translates to roughly 350-ish at the tires


like others have said, for the same coin, you can piece together a much better package

 

its true for flywwheel HP!!! I though about it. But you see better results out of built LT1 cars for the same $$$$$$$$$$.

 

ported stock LT1 heads will give more hp gain for your $ VS stock LT4 Heads and cam

 

Stock for Stock the LS1 puts out more power.


Here is something interesting to think about..

The Stock LT4 is 330hp, 310tq(something like that)

They claim it to be 425hp with the Intake, Heads, Rockers, and LT4 Hot Cam.
So essentially that Kit when complete is that Stock 330hp LT4 with just the Hot Cam installed after you are done, then magically it's 425hp.

The Hot Cam here is shown to have a 95hp increase..

But that's if you think about it..

 

I had a friend with a 94 Formula and LT4 heads, hot cam, 1.6's, hooker lt's, ORY, loudmouth and an SLP CAI. Car sounded mean but never made good power. I think he dynoed at about 390 flywheel. Buy better parts for the money, LT4 heads are outdated.

 

It's true and false. Reasons being is said though, FWHP vs RWHP. That 425fw to 330rw conversion is a wee bit off though. Even an A4 would still make 370rwhp from 425fwhp (that's using a hypothetical engine that IS making 425). You'd be happier with a different setup, like the LE2.

 

^^You got your math off a little bit bro..

330 at the wheels in an Auto with a 22.5% Drivetrain loss is roughly 425hp at the Flywheel..

You take the number at the Wheels, and divide by [100%-(Drivetrain Factor)], then put a decimal infront of the number that you get cause it's a percentage.

330/(100%-22.5%)
330/77.5%
330/.775(move the decimal cause it's a percentage)
330/.775 = 425FWHP

 

Hmm... I thought A4s weren't that much of a loss Thanks for the clarification though Merv (My math is horrendous even if I knew the right numbers lol)

 

I think the answer is clear haha... wrong way to go. I hate that A4s lose so much to the wheels. I'm probably not even putting 300 down

 

The general rule that I have always seen was 15%-18% for Standards, and 20%-25% for Autos. Math is one of my strongpoints..

 

**** I hate numbers!LOL! Except time slips!

 

^^Lol.. you have to know plenty of them to build an Engine..

 

Basicly
i got 3 grand extra save for car

1000 slp ram air hood (painted)
2000 Cam, heads, intake manifold(installed at my mechanics)

do these numbers make sense

already have CAI ,exhaust, TB and a Tune

goal be as fast as bolt on ls1 w/o using n20

 

haha your right you do!!!!! thats why his car is going to speed inc and hes not doing it himself!!!!! hes a retard with numbers!! hahaha...kiddin AC!! (just a little slow)

 

[QUOTE=the_merv;10496743] The general rule that I have always seen was 15%-18% for Standards, and 20%-25% for Autos. [QUOTE]

agree'd thats what i always heard to use as a rule of thumb. although there is always the na sayers who don't believe that, but as many times as i have read that all over the internet and magazines its hard to deny.

and just incase you were wondering AWD is typically between 25%-30%
although i know several AWD guys who all say that is BS.

 

get a le kit dont buy the lt4 kit do it right the first time

 

False. Not to the wheels at least. Does anyone else think $2k to buy heads and cam and having someone else install it sound a little cheap? I would focus on the motor first and if you have money left over, then worry about the hood.... just my opinion though.