Turbo sizes

[98koukile]

I've heard so many different things about which turbo to use but people seem to leave out their applicationOn a KA-T which is the turbo of choice for quick response and low lag?I would assume a KA can spool a bigger turbo faster than a SR can but I don't have any experience with either engine turboedFeel free to add another turbo or edit the trim, just looking for some people who have some R&D under their belt

[andyo]

I'm also turboing my ka some time soon. I'm planning on going T28, besides I already have my T25 flange mani. I've heard that most people running T25/T28s on their Ka's end up dissapointed with their results leading them to switch to T3's. how is that? It 'd be great if you guys with more exp. give us some advice.

[S13FX]

Here you go Bro.

Turbo 101

There is also a recent post flying around here where C-Kwik has written up a totally awesome write up on choosing the right turbo for the right application. When I get some time Il search for it, and post in here.

That link above however is a freakin awesome article WDRacing did a while back which will answer A Lot of questions too.

As to your question. It all depends what you want out of your set up. I Personally used a precision GT32 turbo and love it, I hit instant 5psi boost at around 3k rpm, and it just pulled like a mad man from there.

[S13FX]

I'm also turboing my ka some time soon. I'm planning on going T28, besides I already have my T25 flange mani. I've heard that most people running T25/T28s on their Ka's end up dissapointed with their results leading them to switch to T3's. how is that? It 'd be great if you guys with more exp. give us some advice.

The problem with a T25/T28 setup is that you cant get much power out of them. What happens to those people is they get bit by the boost bug, and usually on a KA, with a T25/T28 it's very hard to break the 300rwhp.

Where as with a T3 setup you can get a smaller turbo at first, and when you get bit by the boost bug it's way too easy to upgrade for more power.

[98koukile]

Well I was looking at the 2871's which are good to about 350-400 depending on trim. I just think for daily driving a big top mount turbo might be lacking the response I want

[nissanfanatic]

Ball bearing 50trim should put full boost at about 3400rpm with a .63ar backhousing..

[Florida240sx]

holset turbo....

[myRed240]

My GT32 isn't laggy at all. I hit my wastegate-spring-limited 7psi at 3100 rpms max. All this on my lovely automatic trans...

It's responsive enough in traffic, but then again, I don't floor it from light to light. Not here in CA where it costs me $3.63/ gallon.

BTW, the GT32 is a 52 trim w .63 A/R backhousing.

[lrb_2000]

I hit full boost (10psi) on my GT35 (.63 a/r turbine) around 3700rpms on my stock motor... I guess that's quite a bit of lag, but I love turbo lag. The power hits so hard when it finally spools, and still get great gas mileage because I'm never in boost.

[nissanfanatic]

That is definitely a little excessive for a GT35 if it is dual ball bearing.

[nissanfanatic]

IMO, T4 manifold.

T04E 50trim w/.58ar turbine housing. Anywhere from stock-450whp with boost at around 3600rpm.

[WDRacing]

One thing you guys need to remember is that the turbo doesn't just consist of the friggin compressor. If I mate up a .48 AR exhaust housing to a TO4R compressor I don't have a turbo thats good for 850WHP. I have a POS because of the restrictive exhaust housing.

The T2 series flanges ARE 2 FRIGGIN small for decent power on the KA24.

The T3/TO4 series is the smallest you'll want to go...ever. If you want instant boost, get a .48AR exhaust housing.

WD

[Florida240sx]

You be on tomorrow night WD? I need some of your knowledge. Talked about it in the past with you before. Also relates to another thread in here...

[extreme135]

I am running a .48 exhaust on my T3 and like WD said you surely will not be making tons of hp on it but I can say that it is a fun turbo I can hit 17psi by 3200 rpm and 10psi by 2700, and still made well over 300whp, though my next turbo will have at least a .60 exhaust just for a little more top end.

[WDRacing]

Lag is all relevent to the driver...

My Skyline didn't hit real boost till 4800-5100ish. Now thats some friggin lag. But it was still pretty damn fun as far as I'm concerned.

Big turbo = more power = more lag.

For instance, I bet Cory could pick up 30WHP with a TO4R or similar sized turbo. But he'd also net some lag to go with.

[98koukile]

I'm thinking that I can get a turbo with low lag 10 psi before 3000rpm and then after i build the motor I can go for more power. Could I use S13 cams to make more power or do I need something like crower cams?

[nissanfanatic]

Oh I plan on it WD. I'm guessing 30whp-ish gained back with larger compressor and turbine, then some more with good tuning on a standalone, and I should be over 400whp on 14psi.

[eazye2000]

I'm looking to go T3 myself.I have a GT28RS and it's fun as hell on the street considering almost zero lag.But alas, I have a built motor running a 'mediocre' sized turbo for the KA.

Not to threadjack, but if anyone has or know's of a good T3, let me know!

[boznuttz]

T3 Super 60s .60/.48 seem to be a pretty popular all around turbo for the buck while avoiding much lag. Boost threshold is decent.
Modified by boznuttz at 9:38 PM 5/29/2007