camelsx

ive read that some mods have to be made to fit this turbo into s13 sr. wat r they or were can i find info on these

-JB-

forums.nicoclub.com there is a search function on that site.

Silverbullet86

there are no mods needed. The GT28RS has a T2 flange so it bolts on your bone stock SR20. For the price, it would be better to get a GT28R for 300-400 dollars less and make similar power. For the same price as a GT28RS, you can get a GT2871R which is bigger than the RS. Some have made 400WHP with the smaller .64 version.

Fabrik8

I like the GT28R (GT2560R) a lot, it's slightly smaller than the -RS (GT2860RS), but with really fast spool. So you'll lose a little bit of ultimate power potential, but you're getting better response in trade. I think it's one of the best low-mid power lever turbos for <2L engines on the market.
For comparison, the B16 and B18 Hondas I've driven with the GT28R (I haven't driven a -RS Honda) dynoed between 275-310, and it looks like the -RS Hondas are around 300-350. This is with normal/no mods and moderate boost levels, I've heard of people getting more power than that but I'm skeptical. That's pretty much apples-apples comparison; I know you have a SR20 but the relative sizing should be roughly the same.

I've been seeing a price difference of around $250, close enough to still make it a tough choice between power and crazy response.

camelsx

my goal is anywhere from 300 to 320. so i was shyin away from the gt28r due to wat i had read about its max output being about 300. and i didnt wanna push it to the limit. but Fab.. brings up a good point about the response time. and i figure the 71 gives me room to go for mor hp if i decide to go bigger later on. but then again with the rs i can get up to 350 which is more then enought in my eyes.cant make up my mind. all good inputs though appritiate.

Fabrik8

You'll hear different opinions about your dilemma. Some people will say to go a little bit bigger so you'll have some headroom if you want more power later. Some will say to size the turbo according to what you want now. I like to size according to your power goals now, so you'll get the best performance (spool time, etc) at the level you're at. I like to go with the smallest turbo that will do what it needs to and not be overtaxed. That's just my personal philosophy, because I'm more into response and street able, readily usable power. Your needs and wants may be totally different obviously, especially if you're building a track or strip car.

The difference between a 2871 and 2860 won't be very big, but it will still exist. You can always sell a turbo if you want to go larger, and it often works out that if you someday want more power, you may want to go even bigger than the 2871. Then it would be pointless to have gotten the headroom and not used it.

I'm not trying to make up your mind for you, I'm just trying to get you to think about the different pros and cons of going either way.

drifterJERRY

remember the associated mods with a turbo that size. injectors, ECU, fuel pump, FMIC, MAF. its not a bolt on and run if you want to keep your motor. to truely get benefit cams and (depending on version of SR) and intake manifold. the exhaust manifold is also something to be considered but i am not gonna get into tubular/log discussion. also, get some braided oil/water lines...it makes life a while lot easier.

Silverbullet86

^