Precision Billet Turbos

[B-rice]

Simon please post the 5858 would be great. I thought the 5862 would be closer to GT3076. Some god info as im about to make a purchase

[SimonR32]

Simon please post the 5858 would be great. I thought the 5862 would be closer to GT3076. Some god info as im about to make a purchase

Lucky for you and very good timing, I went shotgun in it last night!

[owen1r]

I watched that car last night, sounded awesome I must come have a look if it's down there in the future.

[natett]

have many people had much success with the 6266 turbo on a built 2.6?

coming from my old supra with a stock 3L (no cams etc either) with a 6466, the 6266 on my gtr feels considerably laggier.

It does seem to be the journal bearing (purchased the car with it on) which would certainly effect the transient speeds between shifts but I still thought there would be more lower in the mid range.

I've just completed a full service and its off for a retune this week so ill have a dyno sheet to put up soon

[Joshbigt62r]

How do you think the Precision 5858 bb would would compare to the hta gt3076r with .82 rear or twin scroll t3 1.06.

[B-rice]

Yes I'm interested in this too. Or even the 5862

[HarrisRacing]

Interested in seeing 5862 as well. I have a 2.75L BC stroker build on stock bores (N1 block) and I want something super responsive for pumpgas on the street. I'm not one for E85 or racegas because they aren't really available in the area.

I'm betting my stroker, with Poncams A, ported head, +0.5mm SS valves, etc will run pretty dang good with the 58mm turbo.

[HarrisRacing]

Finally got my car tuned.@19 psi, 93 octane 611/449 tq on precision 6262. Lmk what u guys think

This pretty much has me convinced of the 6262. Are you on a stock stroke and/or displacement?

I have a BC stroker motor on new N1 block (std bores), ported head, SS valves, Tomei Poncams A, etc. I'm going for a nice response build.

Another shop is trying to get me to run their billet (not precision) version of the 6262 and I may take them up on it since he's offering a great price and warranty. He just wants to see what it will make on a good RB26 setup. They have made 640 whp on a stock 2JZ with their 6262 and wanted to see what it would do on a built 2.75L RB26.

What manifold is everyone running?? I don't want to have to change my R32 PS or A/C out to later.

[Run-It-Hard]

Hey guys,

Just picked up a Precision 5858 off a mate that needs a rebuild. It currently has a .63 rear housing and I was curious if anyone has seen any results with this kind of set up on a RB25.

I've seen Rondofj's results with slightly smaller 5558/.63 combo and his car made 286kw with full boost around 3600-3800rpm. So I'm assuming I'd have no issues running a 5858 with the same rear housing ... might make the magical 300kw mark too? (kinda all I want on a unopened RB25 for drift anyway).

My guess is it would be responsive as f**k, just wondering if it'll choke in the top end, and/or cause excess exhaust heat/restrictions etc.

Thanks!

Edit: I saw the 5858 on the RB25 neo on the last page too, very impressive!

1998 R34 GTT

Stock RB25DET NEO
3" metal intake
Z32 afm
Precision 5558 0.63a/r turbo- ported cover
Turbosmart Compgate 40mm off turbine housing
Cooling Pro FMIC
Stock exhaust + intake manifolds
3" dump with plumb back
100 cell metal cat
3" exhaust
Siemens Deka 60lb injectors
Walbro GS3442 fuel pump, direct voltage
Nistune
Yellow Jacket coils

286rwkw @18psi, intake temps getting hot, will change piping and crank boost up later, and post dyno sheet when I have access to a computer

Edited March 24, 2015 by Run-It-Hard

[QUP29]

This is going to be bad ass

[SiR_RB]

I saw that last night

Should go awesome, same HP rating as a 6266 with less lag !

[iruvyouskyrine]

Released April 1st haha, too good to be true? [emoji16]

[SimonR32]

I saw that last night

Should go awesome, same HP rating as a 6266 with less lag !

Less lag will be a stretch, just because the wheela are smaller doesn't negate the fact it's pushing 50hp more of air. Keen to see results though, could be a downgrade/upgrade for me

[SimonR32]

Wound the 6262 up a bit more for racewars this weekend

[iruvyouskyrine]

Hahah the run ID says it all.

But that is a seriously impressive result!

[HarrisRacing]

Wound the 6262 up a bit more for racewars this weekend

Effing-A that is some good power!!! All this on a STOCK bottom?!?!

As a mechanical engineer I LOVE reading data and sorting through turbo selection and compressor maps...none of which Precision provide...but DAMN the numbers don't lie!!! I guess they let their powerbands do the talking. This turbo would be sick on my stroker motor.

I have to ask, why do so many people keep the revs down on their dynos? Am I crazy in thinking mine will go 8-8500 no problem?

Edited April 8, 2015 by HarrisRacing

[jangles]

Effing-A that is some good power!!! All this on a STOCK bottom?!?!

As a mechanical engineer I LOVE reading data and sorting through turbo selection and compressor maps...none of which Precision provide...but DAMN the numbers don't lie!!! I guess they let their powerbands do the talking. This turbo would be sick on my stroker motor.

I have to ask, why do so many people keep the revs down on their dynos? Am I crazy in thinking mine will go 8-8500 no problem?

You'll notice it pretty much makes peak power at 5-5500rpm.....no point revving it to 8k.

[HarrisRacing]

You'll notice it pretty much makes peak power at 5-5500rpm.....no point revving it to 8k.

Green line is power. Power peaks all the way near 7500. Even if the power stays over 600 above this, there is still a reason to stretch the powerband out and have the tune in place for the revs. I am curious if the engines can do it is all...maybe this is too much to ask for the stock bottom end?

[jangles]

Green line is power. Power peaks all the way near 7500. Even if the power stays over 600 above this, there is still a reason to stretch the powerband out and have the tune in place for the revs. I am curious if the engines can do it is all...maybe this is too much to ask for the stock bottom end?

So it is.

A built engine will rev beyond 10k if you want it to...i.e. Massive turbo.

[SimonR32]

Green line is power. Power peaks all the way near 7500. Even if the power stays over 600 above this, there is still a reason to stretch the powerband out and have the tune in place for the revs. I am curious if the engines can do it is all...maybe this is too much to ask for the stock bottom end?

Limiter is at 8800, kicks in around 8500... I'll change around 8500 on the weekend.

I think the dyno was just set to limit at 8000

Edited April 9, 2015 by SimonR32