Precision turbos?

[ncturbospecv]

I've been considering going bigger for some time now. I have an rb25 and looking for something with decent spool. I came across a few precision turbo's I'm interested in. I've been considering a lightly used sc60 with a .63exhaust side for a decent price and this turbo linked below. I was wondering what kind of spool time i can expect with the sc60 and the one listed below. Any input is appreciated.

http://www.treadstoneperformance.com/pr ... 2FT4+Turbo

[240z4u]

Take a good look at the compressor maps to make sure you aren't going to end up in surge territory like I did with my T3/t04e 60 trim that I had..

I hate to be on the fanboi track, but my HX35 works wonderfully.

[chad b.]

SC series turbos are old technology. People make really good numbers with the new billet wheel PTE's, but the journal bearing centers don't last. A buddy of mine has been through 2 of them in the past year on a street car. If you get one, get the wet center. I think a Bullseye or a Forced Performance is the best turbo on the market. FP's HTA3586 and HTA 3582 are bad mofos. The spool time of a 35R with enough flow to make near 750whp. Boost response between shifts is ridiculous. They will hit 20+psi on a DSM motor by 4,200rpm.

Holset turbos are made for diesel motors (http://www.myholsetturbo.com/index.html).

[240z4u]

Holset turbos are made for diesel motors (http://www.myholsetturbo.com/index.html).

I would still use one over an old technology t3/t4 given the choice.

[ncturbospecv]

Thanks for the replies guys. Only thing i really dont like about the holset's is they're rather big size wise. And the last holset i got the guy lied and it ended up being siezed and i never heard back from him. Does the hx35 really spool as fast as a 30r?

[240z4u]

I couldn't tell you. I have never directly compared them.

IMO Chad is correct though, I would avoid oldshool t3/t4 turbos and get something a bit more advanced. Not sure what your budget is or WHP goal would be though. I don't have any good recommendations.

[ncturbospecv]

i want a turbo good for around 400whp. Kind of trying to stay on a budget for the turbo and plan on going with the rawbrokerage manifold.

[240z4u]

Buy the turbo you will need in the future IMO. IT's quite a bit of work incorporating a new turbo into a system let alone having to do it twice. Plus paying for a turbo twice...

[ST240]

I'm running a billet 6262 T4 .58 on my RB30. Spool is ok, I feel it should be better for such a small rear end. I dont feel its making a ton of power for the boost I'm running; 15 psi, which iver heard is common for them. Ie you need more boost to make similar power to a garrett equivalent. The a/r is choking it above 5000 rpm. I'm swapping it out for a GT35R 1.06 TS T4 this winter.

[Shocker]

I'm running a billet 6262 T4 .58 on my RB30. Spool is ok, I feel it should be better for such a small rear end. I dont feel its making a ton of power for the boost I'm running; 15 psi, which iver heard is common for them. Ie you need more boost to make similar power to a garrett equivalent. The a/r is choking it above 5000 rpm. I'm swapping it out for a GT35R 1.06 TS T4 this winter.

For your displacement that .58 a/r hot side is too small, I bet if you changed hotsides out you would love it. Also you should be full spool below 4k right?

[RRRRB]

i have heard people having issues with the center sections on the JB precision units, however Precision is very good about replacing them, i have a 6265 billet JB on my honda and havent had an issue yet... making over 600whp and running 28+psi been on it for over a year

[ST240]

I'm running a billet 6262 T4 .58 on my RB30. Spool is ok, I feel it should be better for such a small rear end. I dont feel its making a ton of power for the boost I'm running; 15 psi, which iver heard is common for them. Ie you need more boost to make similar power to a garrett equivalent. The a/r is choking it above 5000 rpm. I'm swapping it out for a GT35R 1.06 TS T4 this winter.

For your displacement that .58 a/r hot side is too small, I bet if you changed hotsides out you would love it. Also you should be full spool below 4k right?

Id say full boost is on by around 4k yes. Yeah but finding a hotside for these things is a pain. Sound Performance carries a .86 divided and its outlet is, according to precision, an "industry standard" 3-5/8" v-band. 3-5/8 V-band? Ain't no industry fawking standard I've ever heard of. If they're trying to make oddball s*** so people feel they have to keep using their products, thats unacceptable.

i have heard people having issues with the center sections on the JB precision units, however Precision is very good about replacing them, i have a 6265 billet JB on my honda and havent had an issue yet... making over 600whp and running 28+psi been on it for over a year

I was out in my garage last night and I saw oil leakage coming from the compressor housing . Only two VERY short seasons on this turbo.

[RRRRB]

sorry to hear, talk to precision see what they can do for you..

Im wanting to upgrade the RB to a 6766 here over the winter:)

[StricNyne]

i just bought 6266 from precision, i ama lil worried about your comment on their jb chra

[Coolwhip]

Carlos, tisk! We have them in stock. No love? lol

[ncturbospecv]

Thanks for all the info. After some reading i might just save up a little more cash and get a gt3076 from ricky.

[Shocker]

i just bought 6266 from precision, i ama lil worried about your comment on their jb chra

Your fine ive not heard any wakes about failing units on supraforums, id say any failure prematurely would be from too much oil pressure. I had this issue and was actually binding my shaft up. It was very tough to spin while the engine was running. Now I restricted my -3 feed into a 1/16th restrictor. Problem disappeared.

[chad b.]

I think an s362 extended tip would be a great street turbo for an RB. It would spool quick and make well above your 400whp mark. Plus Bullseye Turbos are super dependable and are a dry center cartridge.

[StricNyne]

shocker, right now i run an4 with no restrictor, what would u recomend ? your setup ?

[ncturbospecv]

I think an s362 extended tip would be a great street turbo for an RB. It would spool quick and make well above your 400whp mark. Plus Bullseye Turbos are super dependable and are a dry center cartridge.

I dont think i want a turbo as big as the s362 but you have got me looking into BW turbos. I was just looking at the s256. Says it can support 450hp with the non extended tip. Do the non extended tips help with spool or only to squeeze a little more power out of the smaller sized turbos?

[chad b.]

Extended tip turbos spool faster. They are comparable to bb units.

[ST240]

shocker, right now i run an4 with no restrictor, what would u recomend ? your setup ?

This is what I am running on my 6262. I would not recommend it however I'm not sure if the leakage is from heat, wear, or lack of restrictor. I'd try at least a 1/8" or 5/64" next time if I ran one again. I think 1/16" (~.063") is too small.

[StricNyne]

mine came in mail today, and they send me wrong compressor housing grrr, i gotta bring it yo my job to see if i gotta fab up some stuff for exhaust looks nice though its the new CEA with billet wheel. everyone at my job is going EFR now too

[Shocker]

shocker, right now i run an4 with no restrictor, what would u recomend ? your setup ?

This is what I am running on my 6262. I would not recommend it however I'm not sure if the leakage is from heat, wear, or lack of restrictor. I'd try at least a 1/8" or 5/64" next time if I ran one again. I think 1/16" (~.063") is too small.

1/16 is not too small with an RB30 that runs 45 psi oil pres at idle and 100psi over 2200 rpms. This is oil pressure dependent, mine was fine with a 1/8 th hole when it was an RB25.

[RRRRB]

ive been using a straight -3 oil feed line on my honda with the 6265 and i havent had an issue... no restrictor and that thing sees close to 100psi oil pressure at higher rpms