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View Full Version : GT2871R - 15 52 trim



hybridynamics
02-15-2006, 11:20 AM
just wanted to share this with you guys since we got some in. looks like it's a pretty easy bolt on affair with them. i'm gonna be testing one on my SR20 car and see how well it performs. it's an exact copy of the HKS GT-RS and a smoking deal. so what is everyone's thoughts on them? here's some pics of it:

specs:
Compressor: 51.2mm inducer/71mm exducer, 52 trim .60 A/R
Turbine: 53.8mm w/76 trim .64 or .86 a/r

http://www.hybridynamics.com/uploaded/2/2871r15-1.jpg
http://www.hybridynamics.com/uploaded/2/2871r15-2.jpg
http://www.hybridynamics.com/uploaded/2/2871r15-3.jpg

jetdriver
02-15-2006, 12:25 PM
Dyno report please. I am really wanting one, but I want to see what they put out compared to the -2. Prices please too.

CA19DET
02-15-2006, 12:38 PM
very interested in the dyno

site says 1075

IKnowNothings
02-15-2006, 12:48 PM
Do you think you could have it dynoed by the end of next week, I have a tax return burning a hole in my electronic pocket?

hybridynamics
02-15-2006, 01:38 PM
Do you think you could have it dynoed by the end of next week, I have a tax return burning a hole in my electronic pocket?




there is no way i'm going to be able to have it dyno'd on my personal car for about another month or so. i'm still working on getting the engine assembled for it. if you can find someone with HKS GT-RS dyno sheets, you'll get a real good idea what it's capable of. i don't see it being all that different from the regular 2871r.

by the way, i updated the price on our site...

97silviarb
02-15-2006, 06:50 PM
Ive got a .86 2871R on my Redtop and I have a friend with the GT-RS. There is a huge difference as far as spool time...my 2871R actually spools faster. The GT-RS actually hardly makes any boost until about 4200+ RPMS and then just suddenly gets a huge surge. Despite what some may have to say about the .86 2871, it is actually quite a fast spooling turbo and has tons more power down low that the GT-RS. Just thought you guys might want to know

boostedS13
02-16-2006, 09:55 AM
Ive got a .86 2871R on my Redtop and I have a friend with the GT-RS. There is a huge difference as far as spool time...my 2871R actually spools faster. The GT-RS actually hardly makes any boost until about 4200+ RPMS and then just suddenly gets a huge surge. Despite what some may have to say about the .86 2871, it is actually quite a fast spooling turbo and has tons more power down low that the GT-RS. Just thought you guys might want to know



Well, the turbine side on this is the same as the standard 2871R.

slammer
02-27-2006, 01:30 PM
sweet, waiting for dyno results...

HIGHMILEHATCH
02-27-2006, 02:57 PM
Ive got a .86 2871R on my Redtop and I have a friend with the GT-RS. There is a huge difference as far as spool time...my 2871R actually spools faster. The GT-RS actually hardly makes any boost until about 4200+ RPMS and then just suddenly gets a huge surge. Despite what some may have to say about the .86 2871, it is actually quite a fast spooling turbo and has tons more power down low that the GT-RS. Just thought you guys might want to know



I find it hard to believe that there is that much of a difference in spool between the two. Are you both running the exact same setups as far as exhausts go? Intake piping? O2 housings? Same intercoolers/pressure drop? There may be other variables attributing to your .86 spooling faster.

SequenceGarage
02-27-2006, 05:29 PM
I have a GT-RS on my S14 SR. Everything on the engine is stock, intake mani exhaust mani head and block are all bone stock on this dyno, and it builds boost around 3250rpm and reaches full boost around 4000-4100rpm. If i had an external wastegate I would be seeing full boost around 3900rpm easy. ALso, i believe i have some small cracks in my intercooler that leak out some air so that may be worth a few rpm as well. (im using a map sensor so the tuning is still on)

On this dyno the dip in the graph is from premature vtc engagement it has nothing to do with the turbo.

Note how much it drops off at high rpm though. I know this is heavilly due to my stock setup but I also feel it is partial to the .64 housing.

http://www.sequence-garage.com/forums/uploads/post-19-1118187200.jpg

I love this setup though the car is so much fun to drive. Only complaint is the crappy wastegate actuator.

This run was at 16psi with no boost controller only the wastegate

CA19DET
03-07-2006, 01:10 PM
any updates or new dynoes etc, i want to order a .64 A/R one ver soon with teh HKS actuator from you guys and was looking for some more info to compare this and the GT28RS,

hybridynamics
03-07-2006, 01:19 PM
any updates or new dynoes etc, i want to order a .64 A/R one ver soon with teh HKS actuator from you guys and was looking for some more info to compare this and the GT28RS,




no updates yet. i've been too busy working on the rb26 car to get anything done on my sr car.

tincan
07-18-2006, 12:46 AM
Any new experiences with this turbo? And why does this turbo not get the widespread use of the 48 or 56 trim ones?

sr20xs
07-18-2006, 01:47 AM
" it's an exact copy of the HKS GT-RS "
so Garrett are now using the HKS designed wheels? I thought HKS designed their own wheels (which Garrett made for them) but used Garrett housings. Is this untrue?

]

pwhitersxs
07-18-2006, 02:07 AM
I made 330 whp and 330 ft-lbs of torque with this turbo @ 20 psi. Spool is pretty decent, but not as good as a stock t25. Jason tuned it at hybridynamics.

vutony
07-18-2006, 02:32 AM
I made 330 whp and 330 ft-lbs of torque with this turbo @ 20 psi. Spool is pretty decent, but not as good as a stock t25. Jason tuned it at hybridynamics.

Thats dam low for boostin at 20psi....wats ur setup.

IKnowNothings
07-18-2006, 02:41 AM
do you have cam or an intake manifold on it?
what octane gas are you using?
i also thought it would make a little more than that

pwhitersxs
07-18-2006, 03:57 PM
Stock intake manifold
Stock cams
93 pump

How do you figure thats low? Thats right inline with everyone else on these boards. The timing is very conservative on the tune as well.

I was having problems with keeping steady boost as well, so the peak pressure was 20 psi.

champa
07-18-2006, 05:10 PM
unless this turbo spools like a t25 it would only be worth it if the cost difference between this and the other 2871 turbo is huge.

KB240SR
07-18-2006, 06:38 PM
A new intake manifold and some 264 duration 10.5mm lift cams will help a huge bit. 330whp is good for using stock everything.

240Shorty
07-18-2006, 08:04 PM
330 is about the most your gonna get with stock cams and manifold as far as i know. I had a t3/t4 57 trim with 19psi and could only net 330whp, then i switched to a 30R and 20psi and yielded the same damn numbers(330whp). Now that i have cams and everything else under the moon 330whp was made on 12psi and only 6500rpms.

Nikeboy355
07-18-2006, 09:04 PM
" it's an exact copy of the HKS GT-RS "
so Garrett are now using the HKS designed wheels? I thought HKS designed their own wheels (which Garrett made for them) but used Garrett housings. Is this untrue?

]
Garrett of Japan makes the turbos for HKS...

vutony
07-19-2006, 01:10 AM
Stock intake manifold
Stock cams
93 pump

How do you figure thats low? Thats right inline with everyone else on these boards. The timing is very conservative on the tune as well.

I was having problems with keeping steady boost as well, so the peak pressure was 20 psi.

Thats why i asked wat ur setup is.......people with this turbo usually have upgrades to the motor...

pwhitersxs
07-19-2006, 02:35 AM
I also have a cometic headgasket and head studs if that helps.
hybrid intercooler
hks hipower exhaust

Cams definitely help the engine to put down bigger numbers, but I am happy with the car now. I finally got it to where I want it, now I just hope my luck is good and it lasts.

IKnowNothings
07-20-2006, 04:51 AM
Stock intake manifold
Stock cams
93 pump

How do you figure thats low? Thats right inline with everyone else on these boards. The timing is very conservative on the tune as well.

I was having problems with keeping steady boost as well, so the peak pressure was 20 psi.
i must have made wrote the last post wrong. What i meant is the output would be a little low if you had cams and an intake. Thats why I ask.

legend4life
10-02-2006, 11:52 AM
Besides the GT-RS dyno above, does anyone have any dynos of the GT2871R - 15 52 trim ?