Gt28
Mar 21, 2008, 01:01 PM
#16
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Revmoto you seem to know quite a bit about this turbo. What do you think the possibility would be on e85? If you could get to 28lbs or even a little more, I think this would be punchy like a ****
Mar 21, 2008, 01:18 PM
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what kind of bost do you think the 1.8ts and svts and such are running? I saw that sr20s are running like 25lbs, but is 25lbs on a 2.0 sr20 going to perform the same as 25lbs on the 2.0 4g63?
Mar 21, 2008, 01:35 PM
#19
I've used the HKS 2510 (small turbine 28), the GT28, GT28RS and the GT2871-15. All of these were on a VW 1.8T with T25 housing. Obviously, that housing won't be ideal at all for the 2.0 Evo. The GT28RS was the best all around turbo I used for the smaller 1.8T, but I decided to step up to the next step and try the 2871-15. It's a 52 trim which is situated midway between Garretts 48 trim and their 56 trim. On the 1.8 motors, the 56 trim was too much and too much lag. As soon as the 52 trim came out, I bought it and replaced my 28RS. It had a little more lag but bearable. The VW transmission does not allow fast shifting AT ALL, but I took the car to the track one time to see what we could do and with ABSOLUTELY granny shifting it, I got a 13.3 at 107mph. Each shift took at least .6 seconds. The mph tells the power story. On a dynojet, it put down 343 whp and 357 wtq I believe. I found an older dyno sheet with the 28RS. I really don't believe that this turbo would be worth changing out the stocker, unless it was the 56 trim 2871.
The dips after the peak torque were what we believed at the time to be boost cut. No way to 'flash' it like we do the Evos, at least at the time. The above graph was made with 25 lbs of boost. Also, remember, the 1.8T is a 10.5 (if I remember correctly) compression motor. Quite a bit higher than our Evo's.
The dips after the peak torque were what we believed at the time to be boost cut. No way to 'flash' it like we do the Evos, at least at the time. The above graph was made with 25 lbs of boost. Also, remember, the 1.8T is a 10.5 (if I remember correctly) compression motor. Quite a bit higher than our Evo's.
Last edited by 9sec9; Mar 21, 2008 at 01:43 PM.
Mar 21, 2008, 01:42 PM
#20
I've used the HKS 2510 (small turbine 28), the GT28, GT28RS and the GT2871-15. All of these were on a VW 1.8T with T25 housing. Obviously, that housing won't be ideal at all for the 2.0 Evo. The GT28RS was the best all around turbo I used for the smaller 1.8T, but I decided to step up to the next step and try the 2871-15. It's a 52 trim which is situated midway between Garretts 48 trim and their 56 trim. On the 1.8 motors, the 56 trim was too much and too much lag. As soon as the 52 trim came out, I bought it and replaced my 28RS. It had a little more lag but bearable. The VW transmission does not allow fast shifting AT ALL, but I took the car to the track one time to see what we could do and with ABSOLUTELY granny shifting it, I got a 13.3 at 107mph. Each shift took at least .6 seconds. The mph tells the power story. On a dynojet, it put down 343 whp and 357 wtq I believe. I found an older dyno sheet with the 28RS. I really don't believe that this turbo would be worth changing out the stocker, unless it was the 56 trim 2871.
The dips after the peak torque were what we believed at the time to be boost cut. No way to 'flash' it like we do the Evos, at least at the time.
The dips after the peak torque were what we believed at the time to be boost cut. No way to 'flash' it like we do the Evos, at least at the time.
Mar 21, 2008, 02:45 PM
#21
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That dyno sheet looks promising, more or less flat up top which I would take over a sharp drop anyday. Especially considering like 9sec9 said, reflashing wasn't available at the time. I think you guys are probably right about the gain vs cost.....but still it would be nice to see someone do it so we KNEW on an evo what's capable of the 28
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Alfriedesq
Evo Engine / Turbo / Drivetrain
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Nov 4, 2003 10:32 PM
