jhilb

iTrader: (4)

I am trying to do a twin setup for an LS1 based street rod. It will be remote mounted. But it's not too far from the engine. I would say the turbo units would be through about 3.0 feet of piping after the header collector.

Initially I will not blow more than 8psi because the LS1 is completely stock. But I want to have capacity for around 800rwhp once I start dropping my stock compression ratio.

I was originally advised to go with a P-trim compressor in the .68 range. Being pretty new to turbos and their technology I decided to pick up an ebay special for fitment purposes.

What I want with was a used Garrett T04B. Compress .60 A/R, Turbine 1.15 A/R. P trim.

I am wondering because it is remote mounted (kind of), if this was not my best choice. After a lot of thinking I am a little worried about lag.


Thoughts? Suggestions? I probably didn't pick a bad turbo (I think), but I wonder if there is a better (responably priced) turbo for my application? Before I start fabbing up my pipes I thought I would get a little more input on this please.

Thanks,
Jeff

BigJls1

I think that turbo has a t3 turbine wheel. call a garrett disbitor and have him look up the numbers, I'll bet it has a t4 flange but a t3 wheel from some sort of large diesel.
If it does have a t3 wheel your in bad shape, It will choke your motor after about 3k rpm. If by chance it has a t4 wheel your in better shape but not much over 500 hp. you could try swaping out the compressor wheel and housing for to4s or to4r but that will end up costing you aroud $500. I say look in to a 62-1 or a TE67/T4 these can be found in the $ 800 to 900 range.
the t67 should be good for 700 whp, I think, if not its close. A lower price unit that will make ok hp is the 60-1 which can be found in the $ 600 to 700 range.

jhilb

iTrader: (4)

Good thing I started asking now me thinks.

Yes, your correct, it has a T4 flange.

Are your recommendations for twins? So a two TE67's then? What A/R's should I be looking for?

Thanks,
Jeff

BigJls1

no I was thinking single with the te67 and 60-1. In a single te67 I would go .96 a/r, based on what I have read about other setups in here.
About the twins, if you did get another turbo just like the one you have you will need to replace those turbine houseing with some t3 in the .63 range. housing are about $180 each. so $360 your not in bad shape for twins, but twins are more expensive to mount......two oil lines, two intake pipes, two wastegates (most of the time), twice the silcone couplers, ect.
I bought three of the turbos you have (well more than likely) and finally just put the t3 turbine housings on them and am gettin ready to run twins, I wish I were not so far comited to twins as I found that a single would have been alot cheaper. What is the data tag on the turbo, they are probally: RE 34something something.

BigJls1

https://ls1tech.com/forums/forced-induction/865959-67mm-700hp.html

read this on a the 67. then make him an offer, he should go to a 76

jhilb

iTrader: (4)

Data tag on turbo is missing, fell off. Compressor housing is marked M9, 407754. Turbine looks to be marked M1.

I just want to make sure I understand this correctly. Your saying go with a .63 Turbine housing, so it spools quicker?

I wish I could do a single but the pipe routing would make it difficult. It'll be easier for me to pipe for twins.


Thanks,
Jeff

BigJls1

Right if you go twins with the t04b's get some .63 turbine's if your going to only be 3' off the collocter. if your going to be farther back like behind the rear axle go with .48 housings. These housings are all assumeing that your turbo(s) has stage 3 wheels wich it should. Do you have TWO of these turbos?

BigJls1

EDIT: just reread your first post and relized you said you have twins in the work. sorry to waste your time with the single bs. so as far as twins the above post should answer that.

jhilb

iTrader: (4)

Thanks. So we are saying that my 1.15 turbine A/R will give me great flow on the top end, getting to the top end will be difficult? That is, because it'll take a lot of air to move the turbine, it's gonna lag a bunch. So I should go with something in the .6 - .7 range (to allow a little room on the top end to hit 800rwhp).

So Basically, my T04B choice is all wrong... ?

I only have one of these turbos currently. I purchased it so I could start fitting my piping.

OK, so if I was do purchase the turbos all over again, twins, trying to make about 800rwhp on a LS6, what should I be looking for ideally?

Thanks,
Jeff

ABeasst

iTrader: (5)

I DEFINITELY would not run TWO rear mounts with a 1.15 housing. Some people have trouble spooling one rear mount with that size exhaust housing. I'd go with some .68/69 housings to get you good spool.

BigJls1

jhilb your to4b will support 400 hp per turbo at about 15 psi max , so thats 800
yeah they will work great. You will have alot of trouble spooling them with 1.15 housings. go with .63 there is not a bunch of choices .48,.63 , .84, .96. ect. there is no .69 or .68 for t3's


Honestly you have to spend alot of money to get reliable 800 hp, the cost of two new turbos will not be a very big percentage in the end. just buy new housings for the turbos you have and drive it till every thing else can handle 800 hp, if you make it that far another $1000 on turbo upgrades aint nothing.

as far as mock up those turbos have a t4 flange.
the .63 housings do not come with a t4 flange on a t3 wheel, so your new flanges will be t3. you cant really even mount them yet.

BigJls1

my choice would be a 60-1/t3 60 trim .63 turbine housing stge 3 wheel. should be good for 500hp each. this turbo is not to pricey. if you have a big budget my vote: garrett gt35. wow

jhilb

iTrader: (4)

Dang, back to the drawing board. Thanks guys.

Jeff

jhilb

iTrader: (4)

Let's say I do go with a new exhaust housing ... around .63 or so. Is that something I can replace myself or will I need a shop to do it?

Jeff

BigJls1

should bolt right up. First to need to find out exactly what you have. I have been asuming that your turbos are the same as mine, call a garrett distributor, or post a pic.

jhilb

iTrader: (4)

Thanks. Pics coming. Not sure how thrilled a distributor would be since I didn't buy it from them.

I think I found some .58 housings on ebay. Based on the bolt pattern it looks like they will bolt up. But I wasn't sure if there was something special to assembling/disassembling these things.

Thanks,
Jeff

Here is the housing I found....

http://cgi.ebay.com/ebaymotors/Turbo...em320217701066

Description of my turbo ... "The turbo compressor side has a .60 a/r and the turbine side has a 1.15 a/r. The compressor wheel is 2.13" or 54mm and the turbine wheel is a P-trim for high exhaust flow. The turbine side is tang divided for better exhaust flow and has the standard T4 flange for the inlet. "

Here are my turbo pics....

BigJls1

yeah that turbo is just like mine. 3" inlet, 2" discharge. t4 flange t3 wheel.

that housing will not fit your turbo its for a bb housing and a t4 wheel. dude there is no .58 for your turbo from garrett. If you call a distributor and tell them you bought a used turbo and you want to buy a turbine housing they will help IT's THERE JOB. you need a t3 housing. you have a t3 wheel.

i have done it three times. 180.00 plus shipping.

jhilb

iTrader: (4)

Understood. Thanks.

Sorry beat a dead horse...

If you were in my position, you'd probably ditch getting the new housing... rather look for a 60-1 or a GT35 is sounds like?

That is what I am probably going to do then. I can't believe I basically got the complete opposite of what I really needed. ARgh.

So I should be looking for twins of something .48-.6 exhaust (turbine) A/R, 0.60 compressor A/R, and a P-trim or better.

Thanks again.
Jeff