t25ish ka-t?

[nismofly]

ive noticed pretty much everybody has a t3 in some way for their ka-t's....

well when i was thinking sr i had decided on a garrett gt2871r, now that ive decided on turbo ka instead i was wondering what people thought of this on ka-t or if i have to start researching again...

[Structure240sx]

that would be a great turbo to use. one guy on ka-t.org will be upgrading to that soon.

faster spool up like a t25 but with more top end

[nismofly]

yeah thats what brought me to it...

ok good then im going to start assembling parts around that turbo...sweet

thanks

[Nismo_Freak]

That turbo would be ideal for a 350rwhp KA-T

I think I'd honestly go with the 0.63 a/r GT3071R if I was to build a KA-T but that is my personal opinion.

[nismofly]

people are getting 350whp out of this on the sr...would it be the same on the ka? or are you saying because it would need less boost on the ka than it would on the sr so it would peak sooner?

[Nismo_Freak]

people are getting 350whp out of this on the sr...would it be the same on the ka? or are you saying because it would need less boost on the ka than it would on the sr so it would peak sooner?

Eh?

If it makes 350whp on an SR it will make 350whp on a LS1.

Turbo is the limiting factor in airflow.

An SR at 10 psi would flow the same as a KA at a lower pressure... mainly because the KA consumes more air per revolution.

I think the GT3071R offers acceptable boost response with a greater range of ability.

[WDRacing]

You can't compare the SR with the KA, but you can use a flow chart to see if it will produce enough volume without becoming a heat pump to make good power.

I've seen the GT2835R make 410 on a RB25 GTS-t. So the 2871 should do very well.

Also look into the 3037 and 3030. If I were going with an expensive GT turbo, I'd buy the GT3037 and I'm pretty much a genious so...lol.

[Nismo_Freak]

You can't compare the SR with the KA, but you can use a flow chart to see if it will produce enough volume without becoming a heat pump to make good power.

I've seen the GT2835R make 410 on a RB25 GTS-t. So the 2871 should do very well.

Also look into the 3037 and 3030. If I were going with an expensive GT turbo, I'd buy the GT3037 and I'm pretty much a genious so...lol.

Or you can buy a GT35/40R for less and have the same benefit as the GT3037 without the HKS name.



GT2835R and GT2871R are two different animals Brian.... I've seen 460whp on a SR with a GT2835R.

[WDRacing]

I think the GT35 or 40 would lag alot more then he's looking for Alan. The GT35 isn't anything more the a T3T4 anyway.

[WDRacing]

For the record, HKS makes REALLY good turbo's.

[Nismo_Freak]

For the record, Garrett makes HKS some REALLY good turbo's.

[nismofly]

haha

i guess what i was saying is i thought the ka, being a larger engine with the same turbo, i would think would make more power at the same boost level...

but as you said it would be good for a 350 whp ka, not comparing it to the sr

[Nismo_Freak]

I think the GT35 or 40 would lag alot more then he's looking for Alan. The GT35 isn't anything more the a T3T4 anyway.

Weaksauce.

However I do think the GT3071R is a better turbo.

You are smoking crack if you think the GT35 is remotely close to a T3/T4.

[goshoryukenx]

GT35, 40, 42R (from left to right???)

[nismofly]

i think its from right to left, not left to right

[WDRacing]

I meant GT30 you ****stick

[WDRacing]

i think its from right to left, not left to right

Definitly...lol.

[WDRacing]

I LOVE YOU BRIAN

[goshoryukenx]

Haha.

[Nismo_Freak]

I LOVE YOU ALAN

[Nismo_Freak]

haha

i guess what i was saying is i thought the ka, being a larger engine with the same turbo, i would think would make more power at the same boost level...

but as you said it would be good for a 350 whp ka, not comparing it to the sr

Well... yes the KA will make more power on the same turbo at the same pressure.

The reason is, as I stated before, the KA at x PSI consumes more airflow than the SR at x PSI.

Now you could get technical and complain about cam flow, head flow, etc. but think of it as a general guideline.

[nismofly]

ok Alan, looking at the GT3071R, how much more time would you think it would be to boost, because i do like that one as well...

ive heard that the bigger the turbo the less reliable it can be...let's say im going for 350whp, as reliable as possible, and best possible spool...would the GT28 or the GT30 be more reliable all other thing equal at that pressure...im not sure how much it would be, i know 340-350 on the sr is right around 20psi on the GT28...

[Nismo_Freak]

ok Alan, looking at the GT3071R, how much more time would you think it would be to boost, because i do like that one as well...

ive heard that the bigger the turbo the less reliable it can be...let's say im going for 350whp, as reliable as possible, and best possible spool...would the GT28 or the GT30 be more reliable all other thing equal at that pressure...im not sure how much it would be, i know 340-350 on the sr is right around 20psi on the GT28...

GT3071 provides about 16 PSI by 3900 or so on the SR. On the KA I'd cut a good 300 - 400 RPM off of that, the KA is an energy monster if you got stock cams.

The GT3071 would actually be more reliable than pushing a GT2871R simply because of the greater efficiency you can run the compressor at to make the same power.

[Def]

The GT3071 would actually be more reliable than pushing a GT2871R simply because of the greater efficiency you can run the compressor at to make the same power.

GT3071R and GT2871R use the same compressor wheel. The turbine is different(T3 vs. T25), so you have a better speed match between the turbine wheel and compressor wheel for the GT3071R. So it takes less exhaust power to power the compressor wheel if that's what you meant.

[nismofly]

im definately real interested in the GT30 now, thanks for bringing that up

[Nismo_Freak]

GT3071R and GT2871R use the same compressor wheel. The turbine is different(T3 vs. T25), so you have a better speed match between the turbine wheel and compressor wheel for the GT3071R. So it takes less exhaust power to power the compressor wheel if that's what you meant.

2871R comes in two trims one is the 3071R compressor's 56 trim and the other is the 48 trim.

Plus the larger housing helps to promote better flow at higher shaft rpm.

And yes, the turbine is a better match as stated.

[nismofly]

oh and if it has any relevance one of the things i saw was when looking for manifolds i really liked the phatka-t.com mani, and im hoping to match their mani and downpipe set with this turbo

[UncleBen]

Very informative thread, nismo keep it updated as to what happens w/ that phatka-t.com mani and downpipe being matched w/ the 3071 turbo.

[nismofly]

sure thing, will do