Turbo matching for SR

[bri96se]

Does anyone have any experience or know of anyone that has a GT30R on their SR? If so at what rpm does this turbo start to spool.

[steve shadows]

Does anyone have any experience or know of anyone that has a GT30R on their SR? If so at what rpm does this turbo start to spool.


a better question or stage of questions would be this...


a. what do you want to do with the car?
b.where do you want power to come on (response) this is different than simply asking where a turbo spools up.
c.what compressor wheel will make the most hp for me and my applications.

now the gt30r and gt40r seriese of garrett high performance turbos are very good options both require aftermarket or custom manifolds and external wastgates, although theres is aversion of the gt30 with internal external is highly reccomended.

Im currently runing a pretty "special" custom turbo that is basically a carbon copy of the precision turbo sc61.

Spool up is also based on how much boost your trying to spool up to what powerband your looking for your question is very general and misdirected...


heres a better idea get back to me on the board reply and let me know what your trying to do your peak hp, and where you want the turbo to start making power. You can make a turbo or get one that will be just as efficent and spool up at about the same rpm as the gt30, also ball bearing does not mean the turbo will spool up faster than its turbine and compressor housing and comp wheel will allow. Some people are under the false assumption that if you have a ball bearing center section two exactly alike turbos will spool up 1000-1500rpm differently thats BS. Ball bearing only helping turbo response not actual rpm spool up, it is the design of the turbine wheel and housing as well as the compressor wheel that decides this. :spank:

-steve

[bri96se]

Auctually I am only looking to have a setup for only about 375-350 whp that will start spooling around 2500-3000 rpm. I don't know if that is feasable or not because the displacement of the SR is 2 liters. If this isn't the right turbo for this setup any advice would be helpful.

[christopher]

Sport Compact Car Magazine did a story on Turbo Mapping last year, I bet you could find it archived on their website. I would read that, it may be helpfull.

[HiPSI]

Auctually I am only looking to have a setup for only about 375-350 whp that will start spooling around 2500-3000 rpm. I don't know if that is feasable or not because the displacement of the SR is 2 liters. If this isn't the right turbo for this setup any advice would be helpful.


don't count out the Garrett GT25R. will bolt to stock manifold and make the power levels you're looking for with decent spool times. for the power levels you want external gate is a must, and you can have an external gate flange welded to the stock manifold to make this work in this case or of course get the inevitable aftermarket turbo header for it with an external gate flange already on it (depending on what you're looking to spend on it all).


spool times will also depend on what modifications your engine has done to it. i have a friend with a GT25R and his car comes alive about 4000rpm, but he has cams/slight bore increase etc. so his engine doesn't breathe the same as a stock SR.

[bri96se]

I wanted something with a wider power band. I know that there are some other things involved in making a turbo reach it full potiental. I just wanted to know if the gt30r was a good starting point. If the GT30R is too big for the SR, for the response that I am looking for, how about the GT28RS. Also are the turbo specs on the garrett web site under rated because according to their website the gt25r is only good for 250 hp.

[VitaminT]

The GT25R on garrett's site is not the same one mentioned above. The one spoken about has a T04B compressor housing and flows way more air than a GT28RS(disco potato). I did some math based on SCC's info a few weeks ago and found that for 350-400HP the GT25R (mentioned above) and the HKS 3037 would be about the best if looking for a ball bearing turbo.

I should note that any turbo making 350+ or anywhere near that is not going to spool at the wished "2500-3000". Sure it might start making some boost there, but it will not reach the sweet spot until about 4K.

I believe that the HKS 3037 is a T25 flange and will bolt up to the stock or modified stock manifold where as the GT30R will require a T3 setup. Also keep in mind that ALL T3 manifolds I have seen for sale are top mount (probably needed for the size anyway). This is going to require more than just a new manifold, but a downpipe extension, oil/water lines, custom hotpipe and more.

For your goals I would recomend the GT25R in .86A/R form that was already said.
You can get one at cheapturbos.com and
http://www.store.yahoo.com/phase2motorsports/gagtnfrgrsh.html

[bri96se]

Does anyone have any experience with the HKS GT2835R?

[DuffMan]

Does anyone have any experience with the HKS GT2835R?

GT30 is too big to spool up that fast, and GT28RS won't likely hit 350whp. Maybe it could barely but it wouldnt be ideal.

GT25R with the T04S compressor would be a good match, and probably the HKS GT2835 but the HKS is pretty rare in the US (also expensive) and not a lot of people have experience with it.

GT28RS would be a good turbo, if you were to settle for say 325whp as a maximum.

[VitaminT]

I know of a guy that is making about 350whp on a 2540R. You may also want to look at the HKS GT-RS, but like the guy said above the HKS turbos are pretty expensive and a little harder to find.

[Pudula]

I went with the gt2871r...it is supposed to be able to spool by 2300rpm with high flow everything (Intake/exhaust manifold/exhaust/downpipe/straight pipe). It is supposed to be capable of 400whp but as for personal experience, my motor is going in this weekend and hopefully fully functional soon thereafter. I'll let everyone know, believe me...

Ryan

[bri96se]

Thanks for all of the insite. Vitamin T, at what rpm does the the guy with the 2540R start to spool?

[bri96se]

Thread Bump

[VitaminT]

Hey dude, I'm not real sure. I will try to find out for you. Keep in mind as well that the HKS GT-RS is suposed to be very similar to the 2540R, but with better spool due to better turbine/compressor matching.

[DuffMan]

I went with the gt2871r...it is supposed to be able to spool by 2300rpm with high flow everything (Intake/exhaust manifold/exhaust/downpipe/straight pipe). It is supposed to be capable of 400whp but as for personal experience, my motor is going in this weekend and hopefully fully functional soon thereafter. I'll let everyone know, believe me...

Ryan


I'm interested in hearing about how this turbo performs when you get everything finished. Should be a good compromise between the GT25R with TO4S compressor and the aforementioned GT28RS. Can I ask how much you paid for it?