98BirdLS1

I'm new to the whole turbo LS1 thing, but it seems a worthy idea. My friend and I are looking for a challening summer project that isn't impossible but yields some good gains. So we are discussing a custom rear(remote) mount turbo set-up.

From what I've read it is a pretty simple concept, just move the turbo back and extend the piping. My question is what all is involved in it?

The idea is to go from headers to a y-pipe into the exhaust intlet on the turbo. Have a external wastegate mounted and a cone-filter mounted directly onto the intake inlet. The compressed air is then sent back to the intercooler and then through the MAF and into the TB.

So...besides all the piping needed ehxaust, intake and intercooler pipes; the turbo, intercooler, external wastgate, BOV, the couplers and clamps, oil lines and oil pump what do I need?

And how should I go about getting it tuned? Have it dyno tuned on a program like LS1 edit or HP tuners or a mial in tune? Thanks in advanced.

P.S. I know this set-up is nearly identical to the STS set-up, I just want to do it myself. Thanks.

ddnspider

iTrader: (26)

fuel upgrades ie injectors lines pumps....plus the obvious supportive mods that are reccommened like springs pushrods etc

98BirdLS1

If I only push about 3-4 psi I shouldnt need new injectors or a fuel pump should I.

And why would I need new springs and pushrods, I'll be keeping my stock cam??

ddnspider

iTrader: (26)

youre going to run rich with the tune...which means at the very LEAST get a pump like a walboro 225 or something.and im telling you if there was anything to trust another member on its getting hardened pushrods.not sure if your an M6 or A4 but speaking from experience get the pushrods....$75 or $5000 worth of a blown motor.and its always smart to upgrade the valvetrain to handle your new found power.stock springs arent known to be very trustworthy.ive snapped a few pushrods in my day so i know what im talking about

ddnspider

iTrader: (26)

and to be honest theres not much point in boosting 3psi...get a cam and youd make the same power.boost is usually 5-6 psi to start on a stock car.

98BirdLS1

I would get a cam, but turbo has soo much more potential. I figured if I ran 3-4 psi I wouldn't have to mess with as much stuff on the car. Just to get it on there and running, then when I upgrade fuel and drivetrain, and I guess now valvetrain, I could up the boost. Then would be a forged motor and more boost. Kind of a progressive thing.

So with the tune, I'm not sure I understand. Are you saying with the stock tune I would run rich? Or with a custom one that is made for me? Thanks again you've been a big help so far.

ddnspider

iTrader: (26)

if you go boost you will NEED a custom tune,preferrably a dyno tune. and they will give you a rich tune to be on the safe side since its a stock motor....my guess is somewhere in between 12.1-12.6.and yes you are correct about a turbo having more potencial but you didnt state you were planning on upgrading to forged internals and such.to be completely honest if it were me...and it is since im in the process of getting my turbo kit...get 42# injectors and a pump..thats what? say $450?then you can boost 6psi and make some decent power til your ready for all your other upgrades.

98BirdLS1

Okay thanks alot. You've been a big help.

Luke

2000 Tran Zam

iTrader: (2)

ya, not sure exaxtly what else you have done, or if its completely stock, but if you want to go the cheap route, but id plan on opening up the exhuast a little too, at least a cutout, if not full cat back.

what they said it true though, its kinda pointless to run 3-4 psi. id say 5-7 should get you close to 400 rwhp if not maybe a lil more, depending on supporting mods. what are your power goals?

98BirdLS1

How would a cut-out work on a turbo car? I could understand headers freeing up some exhaust flow, but cut-out would completely bypass the turbo??

I'm looking for around 430 rwhp before I would start tearing down the block for forged internals. So with the proper turbo, the fuel upgrades and accommadating boltons would that be possible on 6-7 psi? Thanks Luke

2000 Tran Zam

iTrader: (2)

well, the cutout would be welded on llike any other, should cost no more then 70 bucks or so. you can go with a decent size turbo, cutout, maybe a tb, and ls6 or lsx intake and you will prob get close to your power goals on 5-7 psi depending on the turbo.

ddnspider

iTrader: (26)

it seems like you dont have a bucn of money to spend so heres IMO a quick checklist of things to get and prices
Phamspeed turbo kit with intercooler....$3000
boost gauge/EGT gauge...$200
hardened pushrods....$75
electronic exhaust cutout...$100
ported stock TB...free
ls6 intake...$300
double valve springs/retainers...$150
injectors/pump/lines....$450
total...$4250 ish
plus chances are you'll run into other stuff youll want or need,but theres a rundown of basic upgrades and supportive mods.

98BirdLS1

Okay I think we have some things confused. I think you two are talking about a traditional front mount turbo, where a cut-out would work. I was refering to a rear mount, where a cut-out wouldn't work.

Money is an issue, sort of. I don't mind spending money on good, neccesary parts, but I don't want to drop the cash on a pre-made kit when I can make it myself for much cheaper. The idea would be to make the set-up for under $2800. With my math and the stuff listed in the above posts its more than possible. Just wondering if I am missing anything, thanks again for the help.

ddnspider

iTrader: (26)

give us a breakdown of YOUR parts and cost and then we have something to work with

98BirdLS1

okay this is just a general overview of the items I'm looking at.
Fuel pump 255l/hr.................................140.00
Fuel Injectors 38lbs/hr...........................300.00
BOV............................................... ....220.00
Turbo............................................. ...800-1200.00
FMIC (used from friend)........................50.00
Oil pump and lines (estimated)................250.00
Air filter............................................ ..50.00
Piping and fastners................................300.00
TOTAL............................................. ...2310.00

That still give me a couple hundred dollars to play with stuff like guages, ls6 intake, or any other thing that might pop up along the build. Please remind me of anything else I am missing. Thanks

Luke

ddnspider

iTrader: (26)

injectors are too small get 42#ers.
you need a wastegate
youre going to spend more than that for exhaust and piping etc,plus headers if you want them.youll need a gauge like you said plus some sort of boost controller...ie Eboost.so your looking at about another $750 to $1k

98BirdLS1

Well headers will be something I can do after I get the whole set-up complete just as an LS6 intake. I have a friend who is mighty handy with LS1 edit so retuning it shouldn't be a problem.

I can also get a good deal on piping, alls I would need is the piping from the turbo to the IC to the TB right? And welding will be done by another friend.

You don't think 38# injectors would be enough? I 've read that the stockers could handle 5 psi. I wouldn't run much more than 7 psi after I have EVERYTHING to support it. You've been a big help so far, thanks.

ddnspider

iTrader: (26)

the thing you have to realize is that the small the injectors the harder they have to work at a given PSI, so with a smaller 38#ers they'll have to work harder and be at 100 % duty cylce more than a 42#er would be.and youre correct that ull need piping from the turbo the the IC,then IC to the TB,but you'll also need exhaust piping off the turbo and another pipe off the wastegate...which ull need.im just giving you an honest answer that youre forgetting certain things that ull need and prices your leaving out.if you think you can do it go for it but your gonna skimp on certain things you shouldnt,like when i mentioned the injectors.anything else you need to know?

Silver02Z28

iTrader: (2)

I built my system from scratch. I've noted most of the parts needed, and the hurdles to overcome including oil feed and return. Check it out.

Pro Stock John

iTrader: (34)

I would go 42's at least, 36-39'lbers will work too hard and you will max the smaller ones out faster than you think.