Well...that was about the best thing you could have said. You took away my doubt that you were unsure. I think the 50 trim .63 ar is the best option for you. If you want, there still is the option of the GT3251e which is a better turbo than the 50 trim, but does cost another $200. It will make more power and still spool fast enough to have a ton of fun on the street. I ran a variant of it..the GT3255b. It's a perfect turbo for a GSR. If you want, i can post the graph and you can somewhat extrapolate that out for your setup. Let me know...if i dont respond to this thread (fat chance since i'm bored with class atm) you can always PM me for the graph

 

Yea man for sure post the graph so we can have a look I think it will help other ppl too since there are a few more that seem like they want to do something similar. im currently getting the 50 trim for $500 I will pay $200 more for a better fit but i suspect 500 is under priced even for the 50 trim and i should stick to that deal.

 

The Shodan steered me toward the 3251 when I was searching for a turbo, but I didn't have the cash, after reading Shister's remarks I kind of wish I had gotten it now. Anyway, he set me up with a Borg Warner 50 Trim T3/T04B .55 A/R and a stage 3 exhaust wheel. At least I'm pretty sure thats what I got, I bought it 6 months ago and still haven't gotten the swap completely done yet. My goal was 300 whp on a stock LS and good spool time. There was a guy on here with the same exact turbo and he saw 12 psi by 3800 rpms.

 

wow thats does sound like a pretty badass setup. How much did you get your turbo for if you dont mind me asking? anyone know how much I can get the 3251 for? (other than from garrett where i know its probbaly 800-1G). the 50 trim is a good price and im leaning toward that.

 

Thought I'd say hey.. I won't say too much until needed, but the 3251 is a bit pricey compared to what most H-Ters look for in a smaller, more matched application. But you see threads here about $2K 62mm "billet" turbos, so who am I to judge. But the beauty in the 3251 is the usable powerband that it covers without resorting to the ball-bearing systems. Here is a graph of one on a stock LS from like 04-05 from a customer that took the plunge, and wreaked havoc on a lot of people on an LS. His name was Justateg, and his old posts are still here somewhere (or Google it).





This was on a bone stock LS, making over 257whp but an even nicer 220ft/lbs at about 10psi on a 2.5" exhaust system and a stock catalytic converter

 

wow those curves are beautiful, nice and consistent. That is definatly what im looking for. Just have to weather the price is right. Setup looks very nice too...sleeper

Thanks for showing up Shodan ive heard alot about you. What do you think about the T3/T04E 50 trim .63 A/R as a second choice?

 

That would be preferable over a 57 trim. The 50 trim actually seems to be a much better torque match-maker on applications that are not VTEC based. You should see how those work on Cavalier 2.2 and 2.4 Ecotec engines. They actually lose power on the 57 trims. If you don't ever plan to go any further than 400whp, even a .48 could work if it is a 50 trim turbocharger, but you will not get the curve like shown above.

 

what do you think about porting as opposed to going Vtech? how does that affect the choice of turbo you would choose? probably need more flow right..

 

im in rthe exact same situation.. im buying aturbo from someone he knows its a 50 trim but doesnt know the a/r but it is a stg 3 wjeel i want power when i want it. i steered away from the 57 .63ar bc of the fact that on an ls you have low end torque to begin with and thats where its going to be..

reliable & quick. not fast just quiick. once i find out the ar on this turbo i will let u know

 

Idunno most B series i know of have very little low end torque. I think we make most of our power mid to high end. Do you know what stage 3 wheel means?

 

no i dont. but my friend who im buying it said it pushes more air through there and thus the turbo didn't fully spool until 4500ish. whcih i find hard to believe if he doesnt know the hotside

im skeptical about buying this thing

 

he said he made 235hp on 9psi on a stock block b18b1

 

porting the head of a turbo car doesn't net the benefits like an NA application, because you're not scavaging air into the combustion chamber. Remember, you're "force feeding" air to the combustion chamber which has different turbulence effects. There's really only a 20cfm difference b/w a PnP head and one that is not. At least that's what we've found with VTEC heads (please note the spelling, its not a phone). hehe.

Simply porting an LS head will not change the turbo choice

 

I think your better off going with a vtec head down the road than porting the LS. vtec heads have much better flow to begin with and more cam options. With better rod bolts and block girdle on your ls the extra 2k revs would be nice.

After researching for my own setup I decided to go with the 50 trim/.63a/r and have been very happy with it. I makes a good powerband and holds power over 8k on my b16. This was for my daily driver and I also wanted a fun streetable turbo. compared to the 57 trim the compressor map is much better and it honestly doesnt flow that much less than the 57.

 

When i was looking around for a better turbo to replace my 60 trim, i talked to TheShodan...after seeing the results people had with the GT3255b, i had to get one. It was the best decision i ever made.


Not that it's a great comparison for your setup, but heres my graph of my stock block GSR at 10.5psi with the GT3255b

 

wow that does look like a nice setup.

Hey what do you guys think about getting a thicker that stock head gasket to lower my CR? what will this do to the way the car runs while not boosting? less power?

 

I loved my gt3255e when i had it on my integra. Had it on a b16 first, then hydro locked that, then had it on a ls/vtec setup.
On the b16 If I remember correctly, I made 273whp at 7 psi. It was fun and spooled very fast with a 3" open downpipe and a ramhorn.

 

WOW! what else did you have done to that engine my man!

 

hey kprashad, i've been looking around at different setups, AFI has a nice street setup that I think we both are looking for. Have you already bought all of your turbo stuff? and just looking to upgrade the turbo??

 

jdm b16 with usdm gsr head, so compression was high. thats probably why it made that power at 7psi.

 

i was going to say thats incredible lol

 

Don't bother getting a different head gasket. Your compression is fine the way it is. If anything, it's a tad low for most stock block setups. Mine was a 10:1...idk what an LS is stock

 

Yea i made the mistake of buying a shitty turbo...now that i know a little more I want to upgrade and do it the right way. I have an SLS ramhorn manifold so far that im happy with that ill keep.

 

I think a USDM is 9.2 and JDM is 9.4...

 

That's plenty low enough... Did you ever decide on a turbo??