APS Turbo Specs.
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Originally Posted by MRC Motorsports
And have you yet seen any APS equiped car make over 700WHP which would equal 800CHP? Nope..Not even APS has done it with t
heir standard turbos..
heir standard turbos..
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Originally Posted by Gunmetal-Z
The Single Turbo kit uses a larger Turbo then? Interesting they would do that . . .
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Did anyone ever confirm the exact specs of the APS TT Ball bearing Turbos? Im looking into upgrading my compressor housings when the built block goes in and need help figuring out exactly what i need.
Rob
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The guys @ Blouch showed me a new billet wheel they have that can be installed in the APS housings - $300 per turbo. It may be worth a call to Hal, he was getting CHRA info on the APS turbos a while back, so he may know or the guys at Blouch may know too. Also, you could try and PM Blinkerfuild on here, he has had the original BB kit and the extreme kit and knows his shizz.
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i ended up sticking with the original aps modified gt2871r and made 600whp on a dyno dynamics on e85. it was also over 100 degrees outside. should translate somewhere close to around 680whp on a dyno jet. i really like the power curve, but turbos are maxed out on airflow. made same numbers with c16.
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Isn't HP calculated from TQ?
Something like - HP = (TQ * RPM)/5250
If so... and TQ is the same, why would HP be any different?
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it is, but in most cases it takes more boost to make the same TQ from E85 and the turbos start to run out of breathe before they start making rwhp (above 5252) or atleast i know thats the case with most E85 GTRs and i would assume it is with the relatively small APS turbos we have
#37
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The ball bearing standard APS turbos are 49.2mm inducer GT2871R (Garrett CHRA PN 446279-31) in modified T25 .64AR turbine housings. I came across compressor housing info once but can't find it again. If I recall correctly, they were from some model of Nissan Skyline.
I confirmed this via measuring inducer and exducer on both the compressor and turbine wheels.
I am 90% confident the APS Extreme kit ball bearing turbos are GT3076R (Garrett PN 700177-7). They are in a .86AR T25 turbine housing with the same compressor housing, modified for size difference of the wheels.
I did not disassemble my extreme kit turbos to measure the wheels, but did the best measuring the inducer of the compressor and exducer of the turbine with my dial calipers.
It could also be possible that the compressor and turbine wheels had a little machine work done to them to get them to fit the housings. I did not confirm this.
As for seeing more torque on the corn burning GTR's, you are seeing the results of boost bleeding off because the compressor can't keep up with demand, or the drop in engine VE because the turbine drive pressure is getting high. The E85 allows taking the turbos to their limit. This can be magnified with alcohol fuels because of the larger exhaust mass.
I confirmed this via measuring inducer and exducer on both the compressor and turbine wheels.
I am 90% confident the APS Extreme kit ball bearing turbos are GT3076R (Garrett PN 700177-7). They are in a .86AR T25 turbine housing with the same compressor housing, modified for size difference of the wheels.
I did not disassemble my extreme kit turbos to measure the wheels, but did the best measuring the inducer of the compressor and exducer of the turbine with my dial calipers.
It could also be possible that the compressor and turbine wheels had a little machine work done to them to get them to fit the housings. I did not confirm this.
As for seeing more torque on the corn burning GTR's, you are seeing the results of boost bleeding off because the compressor can't keep up with demand, or the drop in engine VE because the turbine drive pressure is getting high. The E85 allows taking the turbos to their limit. This can be magnified with alcohol fuels because of the larger exhaust mass.
#38
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I called my bro today and asked why he went with E85 on his supra, aside from being cheaper he said it makes more HP than c16. For the reasons above and they speculate ethanol having a cooling effect which helps with the higher IAT seen in boosted cars.
/endderailment
/endderailment
#39
Guys any idea what the standard GT2871r turbos max out at in boost?? Im running 11-13psi at the moment and my tuner says there only good till 16psi?? Im sure people have run them higher on here??
If they are ok to 17-18 psi I may fit the stiffer forge acctuator springs and re tune to 17-18psi. ??
Thanks.
If they are ok to 17-18 psi I may fit the stiffer forge acctuator springs and re tune to 17-18psi. ??
Thanks.
#40
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Guys any idea what the standard GT2871r turbos max out at in boost?? Im running 11-13psi at the moment and my tuner says there only good till 16psi?? Im sure people have run them higher on here??
If they are ok to 17-18 psi I may fit the stiffer forge acctuator springs and re tune to 17-18psi. ??
Thanks.
If they are ok to 17-18 psi I may fit the stiffer forge acctuator springs and re tune to 17-18psi. ??
Thanks.
right now I'm running 15psi @ 3k RPM tapering off to 13psi higher up in the RPM
just on wastegate spring with Forge Actuators
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