striker754

iTrader: (53)

Is it fine just to upgrade the rods and pistons and keep the stock crank? Will it handle a t76 turbo setup?

ALso, can the factory pcm be used? I am more familiar with lt1s than ls1s but learning more everyday. I know the lt1 pcm didnt really work with a non linear boost source like a turbo

Thanks guys

NoGo

iTrader: (2)

You'll be fine with the stock crank.

Send the crank out to get nitrated (be sure that they keep the reluctor wheel in place) and your good to go.

The Factory PCM for the LS1 is your best bet up to about 800-900 HP. After that injector size and injector drivers become an issue. However, with a little creativity you could get the factory PCM to work for 1000+ HP.

striker754

iTrader: (53)

read around a little bit and it looks like you can get a 3 bar map sensor for the ls1? Is speed density easiest? do you have to do anything special to use it?

I will definately be below the limits you gave for the pcm.

NoGo

iTrader: (2)

Up to about 500ish HP I would just keep the factory MAF setup and tune accordingly.

Above 500ish a turbo setup usually fares better with Speed Density.

The faster your turbo setup spools the more you are going to want to go with Speed Density.

6techniques

iTrader: (7)

look up Na$ty-TA on the boosted list (amongst others), he's running a factory PCM (with a few additions of course) and he's running very impressive times in a STREET car.

Also like NoGo said you'll be fine with the factory crank, which has been proven to hold 1000+rwhp.

striker754

iTrader: (53)

how does the ls1 fare with a t56 and turbo? does it bog? PS: this is going in an RX7

camarols1

iTrader: (17)

There are quite a few guys over 1K HP with the stock crank, so you should be fine
with a rod / piston upgrade.
The factory PCM can be used with up to 60lb injectors high-impedance injectors.
If you plan on making more power than 60's can handle, you will have to run a Acceleronics driver box for big low-impedance injectors.

6techniques

iTrader: (7)

I dont think bogging is a common issue (or even an issue at all for that matter) with the t56's. with the right clutch setup and upgraded hydraulics, you'll be fine.

striker754

iTrader: (53)

sorry for all the questions guys but for some reason the search function does not work. How hard is it to do a speed density conversion? If I remember right the LT1 pcm had an option to switch to it, does the ls1?

I have a friend with a wrecked in the rear a4 00 camaro that I planned to grab the ls1 from. Should I still go for this since all I will be using is the block and crank? I will have to get everything balanced. Any machine work that should be done to the block while it is apart? Anything problematic with the ls1s? Or just get the assembly balanced and make sure the heads are flat

eagle 6.125 hbeam rods fine? block need any clearancing?

camarols1

iTrader: (17)

If you are staying stock displacement you will not have to clearance anything.
The Ls1 can accept a 4.0 stroke with little to no clearance issues.
The LSX engines are far superior to the Gen1 ant LTx engines.
Get the optional rod bolt upgrade and have everything balanced.
Tell the builder that you will be boosting the engine and how much ultimate HP
you want to make in the future and he will set the ring end gap accordingly.
500HP will get old quick, so plan on building it for more now while everything is apart.
Start with low boost until you get used to it, then you can crank it up later.
The stock heads can make well over 700HP under boost.
Just get the turbo kit, real valve springs, and a good fuel system and you are set.
You will need a professional tuner for the SD tune, or you can try it yourself
with HP tuners etc.
You will be way ahead of the game if you at least have a shop set you up with a safe base tune. Then tweak the tune if needed as you go.
Good luck!

striker754

iTrader: (53)

any necessary machine work I should have the machine shop do besides balance my rotating assembly and make sure my heads are flat? I don't want to pay for things I don't need.

2000 Tran Zam

iTrader: (2)

not entirely true... I'm on stock pcm with 75 lb rc engineering injs which as I know of are the bigest u can g before u use a converter box.

I'm running a 3 bar SD tune on stock pcm and it has very good streetability (before I blew it ullp )

what horsepower level r u trying to reach? stick with stock cubes and go up to a 76 trim turbo and u should be fine. if u want 600rhwp or so u can even go pt61 or something...

plan on getting a12 bolt and good clutch tho.

striker754

iTrader: (53)

I think I want to make probably around 700rwhp or so. maybe more, who knows.


the turbo has a 4" outlet, what size exhaust should I run? Will 3" be sufficient? Im not sure if it will. 3.5" tubing is just a weird size and hard to find stuff in and 4" is so damn big

2000 Tran Zam

iTrader: (2)

3 inch supports 1000rwhp from what ive seen so you should be ok with that.

camarols1

iTrader: (17)

2000 Tran Zam
How is your idle with the big high impedence 75lb injectors? How much fuel pressure?
I was concerned that the response of the big high impedence injectors would
be sluggish around town, so I picked up the 96lb/converter box kit.
Maybe I will rethink this plan if yours is nice around town....

2000 Tran Zam

iTrader: (2)

drivability like i mentioned is pretty much just like a cammed car.

it idles fine, not really much bucking or surging, and feels pretty nice when you floor it


I think we are at 58psi fuel pressure, but we've got a FPR on there too.

Depending on the situation I might actually be getting rid of these injectors and picking up the 96#s and converter box cause im limited to 9xxrwhp or so.

So I'm gonna talk to my tuner and if we can get away with the converter box and bigger injectors with not much changing to the tune(extra money, lol) then ill prob get rid of these so I can get my 1xxxrwhp number ive wanted, lol.

I hear it all has to do with the tune for idle drivability...

These inj's work great, I just wanna see if I can squeeze more power out of it with the rest of the fuel system I have.

striker754

iTrader: (53)

I'm thinkin around 700rwhp-750rwhp is what I want. I'm still not sure what size injectors I would need. Some folks say huge others say relatively small. What do you guys think? Get the acceleronics box and 96lb/hr?

I dont want to buy too small of injectors.

Also what fuel pumps are you guys using? I will need to figure something out in the rx7