Will .64 AR Make power through 8k ?

[1.8turboterror]

I know this question can't be answered exactly but anyone with a bigger turbo should be able to get me a close answer thank you. By the way its a precision sp6262 billet ball bearing with a .70 a/r. compressor and debating on a .64 or .82 v band in out exaust turbine housing I think the .82 will be laggy but i dont want the .64 to fall off to fast at top end heres a video of my new turbo with the exaust housing im selling

http://www.youtube.com/watch?v=1sQ6louQaYM

[boost_boy]

I know this question can't be answered exactly but anyone with a bigger turbo should be able to get me a close answer thank you. By the way its a precision sp6262 billet ball bearing with a .70 a/r. compressor and debating on a .64 or .82 v band in out exaust turbine housing I think the .82 will be laggy but i dont want the .64 to fall off to fast at top end heres a video of my new turbo with the exaust housing im selling

http://www.youtube.com/watch?v=1sQ6louQaYM

You say you have a built engine, correct? Do you have the right cams installed to accompany your goals? Good question, what is your goals? Because you're saying you want top end and don't want the turbo to fall off, but I think you should be more concerned witht the engine first.

Back to your turbo, looks like a pretty nice unit that does not use water jackets, but air-fin cooling. If you're looking to score some extra power on the rollers, the .82 is the way to go. But if you're looking to retain some driveability and not have such a laggy car, then a .48 or a .6? would suffice. Why are you selling .63 housing for a .64 housing? Be careful at what you wish for with this "quote" top end you speak of. The negative results could result in you never posting again in this forum or ever again. Just a friend and a enthusiast that has gone down the road you speak of and have nearly met his maker .

P.S. The housing you speak of will support you forcing your engine to rev at or around 8000rpm as long as the rest of your engine's components is supportive as well. Dee
Modified by boost_boy at 12:20 AM 4/11/2010

[1.8turboterror]

Thank you man for the advice after reading what you have too say I am going to go with the .64 a/r. and the reasoning for me selling the .63 a/r. is because I am having a custom front mount turbo manifold made and would like v-band in and out v-bands make life so much easier my whole exhaust is already v-band so if im having a custom manifold made and getting rid of the cheap one I had i might as do it right the first time. And thanks for the response man. I think the .64 a/r. will be more fun to drive also.

[float_6969]

Yea, I'd say .86 is out all together. I'd look at either a .64 or .48.

[mbmbmb23]

..... Back to your turbo, looks like a pretty nice unit that does not use water jackets, but air-fin cooling.....

Modified by boost_boy at 12:20 AM 4/11/2010

That's a ported shroud/anti-surge housing.

[roast]

That's a ported shroud/anti-surge housing.

Yep, ported shroud/anti-surge as well as air-fin cooling (look where the coolant lines are supposed to be)

[mbmbmb23]

Yep, ported shroud/anti-surge as well as air-fin cooling (look where the coolant lines are supposed to be)

Yeah you're right.....I watched the video (instead of just googling the turbo)...the turbo looks sweet but I doubt the fins do much besides look aggressive. I guess ceramic ball bearings don't need water jackets to cool them?!?

[1.8turboterror]

"Precision Turbo Dual Ceramic Ball Bearing TurbochargerThese units feature an air-cooled, ball bearing center housing rotating assembly. Dual, angular contact ceramic ball bearings are utilized for maximum durability and an increased thrust load. These units require the use of a 1/8” NPT to -4 AN male fitting on the oil feed side, which can be purchased separately from Precision Turbo (PFT047-3039). At this time, we do not feel it is necessary to use an external oil feed restrictor fitting. At the minimum, we recommend the use of a -10AN oil drain flange/line. This flange can be purchased separately from Precision Turbo (PTP074-2008). Water cooling is not required on these units.***This unit has been sealed for quality purposes. Do not remove the factory oil feed restrictor fitting, or damage may result***If you have questions about this, or any of our other products, please contact us directly at (219) 996-7832."

[croustibat]

i know that the biggest gt2871r with .64A/R does not hold its pressure that high. It still gives a lot, like 1.8bar on a ported head with 260 10.25mm cams , but that pressures falls to 1.4bar at his new redline (9000rpm) .i dont know how this and your turbo are related though.

[1.8turboterror]

i know that the biggest gt2871r with .64A/R does not hold its pressure that high. It still gives a lot, like 1.8bar on a ported head with 260 10.25mm cams , but that pressures falls to 1.4bar at his new redline (9000rpm) .i dont know how this and your turbo are related though.

Did the pressure fall off Or surge? and does power drop at 9k or still climbling I would like to see a dyno chart if available thanks bro.