KA-T turbo size suggestion question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

240sxfan6882 · 07-27-2012, 06:16 PM

I currently have a t3/t4 50 trim .63 turbo, and it pulls hard up top but I really dont like the overall response of it, so im looking for a smaller turbo.

I came across a Turbonetics T3 turbo that can be built to the following specs:

T3 compressor with Super 60 Trim Wheel
3inch Inlet
Ceramic Ball Bearing with Water Cooling
F1-62mm Turbine Wheel
V Band inlet and outlet
and .65AR turbine housing

The ball bearing option would give it a tad more response, but the overall smaller size would make the biggest difference. My goal is 15PSI and to push around 300-ish HP.

Thanks for any suggestions guys! Much appreciated!

*fliprayzin240sx* · 07-27-2012, 09:02 PM

Get a GT2871R...

shoguner · 07-27-2012, 09:10 PM

Quote:

Originally Posted by 240sxfan6882

I currently have a t3/t4 50 trim .63 turbo, and it pulls hard up top but I really dont like the overall response of it, so im looking for a smaller turbo.

I came across a Turbonetics T3 turbo that can be built to the following specs:

T3 compressor with Super 60 Trim Wheel
3inch Inlet
Ceramic Ball Bearing with Water Cooling
F1-62mm Turbine Wheel
V Band inlet and outlet
and .65AR turbine housing

The ball bearing option would give it a tad more response, but the overall smaller size would make the biggest difference. My goal is 15PSI and to push around 300-ish HP.

Thanks for any suggestions guys! Much appreciated!

Weird... I have the same turbo.
The smaller the Exhaust housing you go the faster it will spool (but could choke out at high rpm)
I am going to get a .48a/r hopefully it will spool faster than 4k lol

Quote:

Originally Posted by fliprayzin240sx

Get a GT2871R...

He has a t3, so he probably has a t3 mani.... why would you suggest a t2???

4x4le · 07-28-2012, 12:36 AM

And ka's hate t2s

Frank_Jaeger · 07-28-2012, 03:09 AM

Quote:

Originally Posted by 4x4le

And ka's hate t2s

Could you send me a pm and elaborate why?

4x4le · 07-28-2012, 07:08 AM

Its just something i have noticed. I believe its due to their larger displacement. They respond to t25s better than the sr but seem to hate it when you run anything bigger than a t25 like when you get into t28s, especially the aftermarket ones.

codyace · 07-28-2012, 07:34 AM

Quote:

Originally Posted by 4x4le

Its just something i have noticed. I believe its due to their larger displacement. They respond to t25s better than the sr but seem to hate it when you run anything bigger than a t25 like when you get into t28s, especially the aftermarket ones.

Interesting. I've always wanted to do a 28RS/2871 Altima for a new daily driver....

4x4le · 07-28-2012, 07:38 AM

there are t3 housings for them

240sxfan6882 · 07-28-2012, 09:56 AM

Actually another thought was for me to go bottom mount with a an SR Tomei manifold converted to KA, with a Comp Turbo with the same specs as the tomei Arms 8270 (which is the largest trim GT2871r foot print turbo I have seen).

For 15psi I would be ok on it, but I agree that if I up the boost the turbo can start to chocke. The KAs flow quite a bit of exhaust compared to SRs due to the longer stroke and bigger displacement.

rcdad123 · 07-28-2012, 04:28 PM

have you thought about a retune. if you can advance or decrease the timing pulled out under boost, it will help spool the turbo faster. the turbo you have now should be spooling at around 3k rpms and full boost by 4500 rpm. t3 .63 exhaust a/r is almost perfect for a 2.4 litter engine. unless your compression is really low.

240sxfan6882 · 07-30-2012, 09:16 AM

Quote:

Originally Posted by rcdad123

have you thought about a retune. if you can advance or decrease the timing pulled out under boost, it will help spool the turbo faster. the turbo you have now should be spooling at around 3k rpms and full boost by 4500 rpm. t3 .63 exhaust a/r is almost perfect for a 2.4 litter engine. unless your compression is really low.

I'm going to remove the intake manifold and block off the EGR, and redo all the hoses in there, and cap off any unused vacuum lines. I will set the timing correctly and get the car dyno tuned here at a shop. I will give it another chance.. plus it will be cheaper than re-doing everything.

Thanks for the input.

silviaks2nr · 07-30-2012, 09:53 AM

my t4 50 trim was way too responsive (.68 hotside) on my motor. Why anyone would want something "smaller" is beyond me. Switch your exhaust manifold (log) and do a full leak test if you want better response.

that super 60 is an okay turbo, very dated though. you could run a billet precision 5758 or borg warner s200 series and make a lot more power and still have good response.

4x4le · 07-30-2012, 10:00 AM

way too responsive sounds like a great problem to have! I understand though depending on what kind of driving or racing you do a little lag can keep you safer though corners but there are many good boost controllers and standalones that control boost that can really allow you to calm your turbo down based on different critera:

tps
rpm
vss

So you can do boost by speed, throttle position, and rpm all independantly

codyace · 07-30-2012, 04:54 PM

Quote:

Originally Posted by 4x4le

there are t3 housings for them

true, but for a nice 10 psi daily driver I can't see how it would be that bad...considering the bottom ends aren't that strong anyway. I do understand the back pressure issue though...but hey, that makes for quick spool! LOL!

07-27-2012, 06:16 PM	#1
240sxfan6882 Zilvia Junkie Join Date: Nov 2004 Location: Los Angeles Posts: 300 Trader Rating: (6) Feedback Score: 6 reviews	KA-T turbo size suggestion question I currently have a t3/t4 50 trim .63 turbo, and it pulls hard up top but I really dont like the overall response of it, so im looking for a smaller turbo. I came across a Turbonetics T3 turbo that can be built to the following specs: T3 compressor with Super 60 Trim Wheel 3inch Inlet Ceramic Ball Bearing with Water Cooling F1-62mm Turbine Wheel V Band inlet and outlet and .65AR turbine housing The ball bearing option would give it a tad more response, but the overall smaller size would make the biggest difference. My goal is 15PSI and to push around 300-ish HP. Thanks for any suggestions guys! Much appreciated!

07-27-2012, 09:02 PM	#2
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Get a GT2871R... __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

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07-28-2012, 12:36 AM	#4
4x4le Zilvia FREAK! Join Date: Nov 2008 Location: Manchester, Tn Posts: 1,253 Trader Rating: (1) Feedback Score: 1 reviews	And ka's hate t2s

07-28-2012, 07:08 AM	#6
4x4le Zilvia FREAK! Join Date: Nov 2008 Location: Manchester, Tn Posts: 1,253 Trader Rating: (1) Feedback Score: 1 reviews	Its just something i have noticed. I believe its due to their larger displacement. They respond to t25s better than the sr but seem to hate it when you run anything bigger than a t25 like when you get into t28s, especially the aftermarket ones.

07-28-2012, 07:38 AM	#8
4x4le Zilvia FREAK! Join Date: Nov 2008 Location: Manchester, Tn Posts: 1,253 Trader Rating: (1) Feedback Score: 1 reviews	there are t3 housings for them

07-28-2012, 09:56 AM	#9
240sxfan6882 Zilvia Junkie Join Date: Nov 2004 Location: Los Angeles Posts: 300 Trader Rating: (6) Feedback Score: 6 reviews	Actually another thought was for me to go bottom mount with a an SR Tomei manifold converted to KA, with a Comp Turbo with the same specs as the tomei Arms 8270 (which is the largest trim GT2871r foot print turbo I have seen). For 15psi I would be ok on it, but I agree that if I up the boost the turbo can start to chocke. The KAs flow quite a bit of exhaust compared to SRs due to the longer stroke and bigger displacement.

07-28-2012, 04:28 PM	#10
rcdad123 Zilvia Addict Join Date: Jul 2011 Location: san diego Posts: 639 Trader Rating: (0) Feedback Score: 0 reviews	have you thought about a retune. if you can advance or decrease the timing pulled out under boost, it will help spool the turbo faster. the turbo you have now should be spooling at around 3k rpms and full boost by 4500 rpm. t3 .63 exhaust a/r is almost perfect for a 2.4 litter engine. unless your compression is really low.

07-30-2012, 09:53 AM	#12
silviaks2nr Nissanaholic! Join Date: Nov 2004 Location: SC Posts: 2,106 Trader Rating: (10) Feedback Score: 10 reviews	my t4 50 trim was way too responsive (.68 hotside) on my motor. Why anyone would want something "smaller" is beyond me. Switch your exhaust manifold (log) and do a full leak test if you want better response. that super 60 is an okay turbo, very dated though. you could run a billet precision 5758 or borg warner s200 series and make a lot more power and still have good response.

07-30-2012, 10:00 AM	#13
4x4le Zilvia FREAK! Join Date: Nov 2008 Location: Manchester, Tn Posts: 1,253 Trader Rating: (1) Feedback Score: 1 reviews	way too responsive sounds like a great problem to have! I understand though depending on what kind of driving or racing you do a little lag can keep you safer though corners but there are many good boost controllers and standalones that control boost that can really allow you to calm your turbo down based on different critera: tps rpm vss So you can do boost by speed, throttle position, and rpm all independantly