1G-350Z

I agree, It would be impressive if they can get a GT25R compressor housing which is good from 250-290 hp depending on the trim... To flow like a 35 compressor housing which supports around 410hp... APS is very particular about there product. I'm sure we will have a viable explaination...

Sharif

May be the turbos shipped in there kits are different? Hmmm

MardiGrasMax

iTrader: (8)

Whats the most HP any one has gotten out of the stock APS turbos, regardless of other supporting mods? Has any one gotten 800bhp/680whp or even close?

1G-350Z

Nope Nope I don't think anyone has reached 800 crank HP on stock APS/Garrett TT's... Jullian from MRC maxed the Turbos out 530whp, and I herd someone else hit around 550whp.... From what I have herd these turbos can't flow enough to support 680-710 whp... If this is true APS's credibility has been shot

Brandon@Forged

http://*********.com/zwiki/Air_Power...rbocharger_Kit

(350z-t e c h is the url)

They list two (or three) different models of Garrett turbos on APS' own site.

tig488

iTrader: (18)

supposedly APS has a shop car with the TT kit putting down mid 700s to the wheels, who knows if they use the same turbos or not.

1G-350Z

Yea exactly, Till this day no one can tell me why the APS TT's looks exactly like a GT25R.... It might be because that the APS turbos are GT25R's which will never flow enough to support (APS's claim) 800bhp! If I'm wrong I'd like some concrete evidence, idicating otherwise...

barthelb

Marluci-has over 700whp. He doesn't post much but i believe that is with the stock APS turbos. I havent seen a dyno but that was what he said, bigbri knows him well so maybe he may know.

mraturbo

iTrader: (1)

After APS contacted VRT to become a dealer, I spoke to both Peter and David.

For their TT set-ups, they said they are using GT28s which is why it was interesting to speak to converse for those are the exact turbos we use in our VRT cars using the JWT kit.

NOTE: To my experience, there is No Way you can flow enough air through GT28s to make even 800 crank horsepower. No Way!

So if APS has a 700 or 800 horsepower car, they are not using Gt28s and their stock TT set-up. They must be using another set-up for sure.

Now, if I am wrong and they are using GT28s, I would absolutely love to see a parts kit, boost level, fuel and timing map, and dyno sheet to prove I am wrong because VRT nor JWT can make that kind of power from stock GT28s. Someone please prove me wrong!

I will eat my words if you can.

Warmly,

Michael

calimarc

Subscribed

Sharif@Forged

iTrader: (92)

Each GT28R can easily flow 300hp worth of air, and with two of them, that is 600hp (at the crank). APS has been a bit secretive about the AR, trim, and other features of there turbo. But a run of the mill GT28R (twin) will only flow enough air for 600 crank hp, or roughly 31 lb/min worth of air (each).

Based on the 20psi APS cars pushing 600whp or so, its doubtful the stock APS turbos are going to flow 700whp or more worth of air, becuase the peak effeciency of the GT28R is about 16psi, with only a minimal increase in mass airflow when pushed to 20psi.

mraturbo

iTrader: (1)

Well said.

M

failsafe306

iTrader: (38)

So is APS flat out LYING when they say each turbo can push 400hp, for a total of 800 crank hp?

MadBoost

iTrader: (12)

No, after seeing numerous Garrett BB cartridges mounted to custom machined T04B and T04E covers over the years and it is hard to say that a standard GT28 cover could not be machined to fit a 2871 compressor wheel which means the exducer is at 71mm. But a 2871 doesn't differentiate between cartridges with the 71mm exducer and varying inducer sizes which off the top of my head include the 49mm and 53mm. Garrett's new nomenclature doesn't account for this. I can't think of the compressor wheel in the GT28r right now but I would think it is close to 48mm inducer and 60mm exducer. I have seen a T04B cover on the GT28r cartridge (31#/minute) and have seen that same cover machined for a 57mm inducer and 76mm exducer (55#/minute) cartridge. Companies like Precision, Innovative, and Turbonetics do this type of machining to make most of their turbos. I think it can be done with garrett made compressor covers and if not, APS has the aluminum casting capability to make their own covers to their specs.

Tom
www.OZOC.org

Sharif@Forged

iTrader: (92)

I dont think they are being dishonest, as there would be no reason to. I think they may have manufacturered some kind of custom turbo setup for their kits, and the specs are unpublished. I was just pointing out what a typical standard GT28R will flow.

There is only one way to find out....someone...please run these turbos to 700whp please.

1G-350Z

I think there are lying.... Untill we see a Stock APS TT's run around 700whp


Sharif: Always so PC....

captj3

iTrader: (1)

Check with MRC he just posted 600 + rwhp on his aps tt at 18 + psi. I think his injectors ran out of fuel at this point. So with the proper set up I don't think they are far off.

failsafe306

iTrader: (38)

Okay, fine, I guess I will....

Sharif@Forged

iTrader: (92)

He just turned up the boost, but did not dyno it. It was a seat-of-the-pants dyno.

mraturbo

iTrader: (1)

On our GT28s with the JWT, we found that after 15.5 lbs, the turbos made no more power regardless of what the timing, fuel, or voltage. No changes for the air flow was maxed out with the 53 mm blades.

APS kits owners - Turn up your boost, give it some more fuel, and get them on the dyno - PLEASE.

Would love to see if these turbos can reach 700-800 WHP.

M

ht4

iTrader: (1)

Are people making the mistake of confusing the amount of air a turbo is capable of flowing with the amount of air they can shove through the restrictions of the intercooler, plenum, intake runners, heads and valves?

The APS turbos are likely capable of moving sufficient air mass to support Garrett's power claims. I think it is also likely that we would have a very difficult time getting that much air into the engine except at very high boost and that we could never get 100% effeciency out of the intake track.

Turbo makers (like garrett) base their claims on the amount of air the turbo can move at a particular pressure, not the amount of air it can get into the combustion chamber of a particular engine (like the VQ).