gt2871rs ($1100) or gt25/40r ($950)

the gt25 is rated for 450 hp , and the 28 is rated for 400 hp. I like the design of the 25 better, but I'm afraid of spool up time.

whats everyone think?

** looks at Dan **

the 28rs is a great turbo. Ive seen them with no shaft play on cars with 200 thousand on the clock.

the 25/40 is a great turbo also but not as great of a history life span wise.

personally Id go with the rs. But you know...

Truthfully either one is good for the application you are using. Id go with the 28rs because of reliability and spool time myself....and Ive seen cars with the pig that were pushing more that 400 ...just an fyi, namely nissans. 8)

ya the RS has a lower efficency range which would be better for me.

Rs benefits :

better spool time
still good for 400hp
long life

Rs bad:
cost more

40r benefits:
more hp peak
cost less

40r bad:

longer spool time

Ive seen the rs boost more than 400 hp on many nissans. Also it peaks more psi safely over the rated limit than that of the 40r.(assuming you would push it, or ever felt like it)

I dunno for the small amount that you could go up I dont think it is worth it to get the 40r. Just because it can handle 450 does not mean you will make 450(you know this but Im sure someone is going OMG 450 with just a turbo)

Well, I would say go with the Gt25/40 because in all the reviews that I've read, it doesn't have that bad spool time. What size injectors are you running?

42lb's to start

You shouldn't have too bad spool time then. I'd go with the 25/40 personally but do what you want. And besides, it's got more potential. You won't get 450 out of it but it'll pull harder at top end then the other one.

true but im a long ways away from pulling 20+ psi daily :lol:

zx2 dyno with (9psi and 17 psi) a t3 super 60 http://www.kctuners.com/members/inis/dyno.jpg

super 60 map http://www.kctuners.com/members/inis/Fig5.gif

gt2540r map http://www.kctuners.com/members/inis/gt254...40rcompress.gif

gt2871rs map http://www.kctuners.com/members/inis/GT287...47_2_comp_e.gif

I don't like how that zx2 dyno's its hp way up high. So what would either of those turbo's fix that. Or would it better be best for me to go with something like a gt28rs ?

whoopsy... :oops:

I I didnt catch the 71 in there from the get...lol

I meant the 28rs from what Ive been talking. By far one of my favorite turbos. And if you want reliability I wouldnt listen to dan :P ...dsm....nuff said j/k dan but you know its true.

See the thing with dsms you go balls to the wall constantly because you know its inevitable that you WILL blow your motor, so longevity of a turbo is not a problem. I havent seen a hp dsm with high miles that has ever been on an oem motor(always been rebuilt or replaced)

I think it is all how you want your curve...you want it down low, dont go with something that makes boost late. you want an up high monster get one that has a huge band. its all how your application will fit it.

see thats what I dont want when all done and said. Ya I'd like to have capabilities of boosting 20-30psi daily but on that same turbo I'd like to boost at 7 and be good. I want my curve to be low til 3k-3.5k then wam bam thank you mam and it sky rockets another 150 hp easily....and then to its up to me to tweak more out with tuning and such.

I think I might go with a gt2871rs with a smaller trim (so I'd have 300-380 range insteal of 350-400, or gt2540r is 400-480 range)

Smelly Josh making his smelly points. I SAID GOOD DAY!!! ::tpppp: I disagree btw. Just because the engines will go if a timing belt slips doesn't mean the turbo's are junk. I've always been partial to garrett and some HKS turbos because of the longevity.

the gt25/40r I'm talking about is Garrett turbo , not the HKS

right but what I was saying is that if the turbo will perform long enough for the engine to blow you are golden 8)

I vote for whatever is going to work well for what range you want.

Think I'm going to go with the Garret GT2871R - prt # 472560 - 15

250-385hp 76 trim http://www.turbobygarrett.com/turbobygarre...R_472560_15.htm
other option for the gt2871r is a 300-450 which has a different compressor housing.

I think I'll go with the faster spooling one (less hp) , I figure once I get over 300 whp if I'm having problems making more and I'm already that far I dont think $$ will be my problem lol.