ok, im new to the forced induction, im planning on getting a twin kit made by ls1turbo,(same kit that firehawk123 had) the kit has the upgraded turbos that are good to 620 a peice, i do not plan on coming even near maxing them out. wht i do plan to do, is to build a nice setup as a DD but be a insane weekend warrior. now u gotta understand there aernt many cars around here that are power houses. the baddest car i have seen around here is a ls1 vette with a rear 67 rear mount. lays about 600. but i just wanted to kno if i get the kit and install it, what psi i should run and what would be a good hp limit to make my tranny last for a little while. as well as the stock 10 bolt thanks,

 

Run no more than 8psi on stock engine.Course that don't really mean much since more important to know what power you get at x psi. It will be different depending on the turbos flow ratings. You have to watch tune like a hawk on stock engine. Stock pistons are crap.. Remember you don't just bolt on a kit. You need to tune the car for the turbo...afr needs to be way richer and timing needs to be way lower. And you need immediate fuel system upgrades. If you are going past 600rwhp later than might as well get a good fuel system like twin intank with bigger lines, rails, boost referenced reg. I am getting one from Lonnnies. I have been keeping the car out of boost and not going wot to break in engine and just had 60 pound injectors in there.
You will also need bigger injectors for now you could run 60s but really you should get a lot bigger ones so you are ready for later on. 60s can work for the stock engine. When you get new engine or build the stock motor then get 80s or bigger if you want to run e85 if its available.Wish it was where I live.

You didn't say if you have m6 or auto? If auto then you need a 4l80e or turbo 400 or turbo 350 if you don't want overdrive and you need a built one of those big bucks..getting one from FLT stage 5 for my build. If you are m6 you will for sure need a good clutch start doing research but likely a twin of some sort..mcleod, tex, spec, something along those lines. Stock t56 might last but build one is better idea.
Rear end will last a bit as you won't have traction until you run something like real drag radials like et street radials. My turbo car laughs at nittos. Especially when the roads are cold and you don't really heat up the nittos. Traction kills the rear end and wheel hop. You can fight wheel hop with suspension mods. Of course when you do rear end eventually you will need very strong driveshaft.
And of course to go much over 600rwhp you will need forged engine with minimum forged rods and pistons,stock cranks are pretty strong. But past 1000rwhp would for sure be looking at stronger everything and past 1200 rwhp or so would be looking into LSX block.

 

thanks for all the info, brought up somethings that i hadnt thought of. such as the fuel system. what i plan to do is get the big injectors so i have room to grow. as for the tranny i am auto. what i was wondering was if i ran my car at say 6 psi(for now) and made around 525 or so, how long do u think the stock tranny would last? as well as if it would help to have a converter? i figured my stock rear would do ok for now since my 275 prolly wont hook the best. also i was wondering if the stock ls6 intake would be sufficient? thanks again

 

Not sure would get a converter right now.If you blow tranny then it could take out converter. Not sure how long stock tranny would last. They are not very strong really in stock form. This is why FI builds get expensive pretty quick. You up the power in one area and other areas need to be beefed up. Even 52rwhp is lots on a stock 4l60.

A built 4l60 can work of course but better options are turbo 400 or turbo 350 if you don't want overdrive and 4l80e if you do. And even those need to be built up.
t56 can stand up stock to reasonable power levels with a good clutch.

As for injectors you still might wind up buying them twice if you have to go up to low impdedence later say for e85 or huge power goals.

The back should be ok if you can't hook it up or don't get wheel up. Nittos don't hook that great when its colder out and if you don't heat them up pretty good. I can spin my nitto 275 right now in the colder temps..mid 30 F wit 325 hp in my 96z with 3.42 and 2800 vig without even trying.

Autos also help save the stock rear ends.

I would do trans first. a stock 4l80e would hold for a bit ,better than 4l60 of course ,then maybe upgrade to built one when you do up engine and up the power.
I wouldn't waste money on building up a 4l60 for big turbo use. Turbo 400 could also do you as well that is cheaper route then 4l80e but no overdrive..up to you.

 

oh and I expect to be upgrading my 60 pound injectors to 80 high impedence or 96 or even 120 low impedence as soon as start taking the power levels much past 650rwhp which is likely where am at now at 7.5 psi with my combo on the m6. Am expecting around 600rwhp when go to the auto. I just put in 60s to get me off the ground.

 

dont expect the stock tranny/rear end to last long at all...on 6psi pushing close to 525ftlbs the tranny lasted 1.5 hours with only one hard run. lol

 

If you plan to be around 525rwhp you'll need a built 4l60e ASAP. A lot of people burn there's up at just 400rwhp. A upgraded fuel system is needed. 42lb injectors and a in-tank pump is the limit up to 550rwhp. The stock 10 bold should hold if you don't have a sticky tire and do not race the car. Otherwise a 12 bolt will be needed.

Go past 550rwhp and your already on borrowed time with the stock bottom.

 

yea ive never been to the track and if i were to go i wouldnt launch it hard i would just roll out, my car does have a brand new 10 bolt in it that the lady who owned it b4 me installed, buy i kno it probobly still isnt sufficient, so what ive decided to do is shoot for 550 hp and with 80pound injectors, and upgraded pump. and then work on my drive train from there, i had a few questions about the tranny, i could go the route of trading my 60 in any getting a stage 3 or 4, but what i would like to do would be to run a 400, but im not sure how all the sensors would be hooked up and how it would tie into the main harness. thanks

 

You could swap to a 400 if you want. A lot of people have. Look in the trans section.

 

Before you get in too far you need to figure out a budget and we can help you from there. You're going to be over double what your figuring once you start upgrading or breaking stuff. FI isn't cheap to start with....once stuff starts breaking it's even worse. I haven't heard much on the gen tt kits either. I think APS stole some of their glory.

 

ive already checked the credability of the kit and ive herd all good things about them, and was told the turbos were a good brand. so now im just worried about what will brake first?