Fastest Spooling Small Turbo
05-31-06, 12:20 AM
#26
Senior Member
Join Date: Mar 2006
Location: Louisville, Ky
Posts: 675
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by uhh
Only difference between a t28 and a gt28r is the inconel exhaust wheel; doesnt make much of a difference. The ball bearing t28 and the gt28r might share different wheels but both are capable of the same power/spool times. Just higher efficency in the gt28r. That is all speculation since I have yet to have either apart next to each other
A gt28rs is very efficent but produces significantly less torque then a gt28r is capable of but barely anymore peak power. Personal oppinon, gt28r or a gt2871R. The 2871r will have the ability to give more peak power but with the same torque curve of the 28rs
What do you mean by lag? It gets thrown around so much incorrectly, just want to see what you actually mean
A gt28rs is very efficent but produces significantly less torque then a gt28r is capable of but barely anymore peak power. Personal oppinon, gt28r or a gt2871R. The 2871r will have the ability to give more peak power but with the same torque curve of the 28rs
What do you mean by lag? It gets thrown around so much incorrectly, just want to see what you actually mean
Correct, but isn't the GT series 28 a dual ball bearing whereas the normal 28 is not?
I think the GT28R is actually the disco potato that was hailed with praise in SCC a few years back, with a better flow rate and less spool time. I thought about using a GT28R for an autoX turbo setup. Lots of low end for getting around corners and impressive top end for its size. I think they said it is worth about 250 - 300 whp.
But that was a long time ago and I might not be remembering that correctly.
05-31-06, 12:20 AM
#27
Needs more Displacement.
Join Date: Jun 2005
Location: Louisville, Ky
Posts: 1,329
Likes: 0
Received 0 Likes
on
0 Posts
Use the stock turbo, keep the TMIC, heat wrap the manifold and housing. Ceramic coat the wheel and housing, full 3" exhaust, no intake/open turbo, port the exhaust in the housings, upgrade the bov (stock bpav leaks alittle)
GT28RS
http://www.importperformanceparts.ne...-garretts.html
http://www.turbobygarrett.com/turbob...S_739548_1.htm
GT28RS
http://www.importperformanceparts.ne...-garretts.html
http://www.turbobygarrett.com/turbob...S_739548_1.htm
Last edited by idsigloo; 05-31-06 at 12:22 AM.
05-31-06, 03:00 AM
#30
No, you're right, I'm talking about turbo lag, and not boost threshold.
Using the stock turbo, I wasn't able to corner as I wanted because I felt it sluggish at the entrance, as I used the throttle. I'm looking for something that spools rediculously quick. I'd also like it to have a big rpm range, in case I fall out of the powerband and am not in a place to shift.
Using the stock turbo, I wasn't able to corner as I wanted because I felt it sluggish at the entrance, as I used the throttle. I'm looking for something that spools rediculously quick. I'd also like it to have a big rpm range, in case I fall out of the powerband and am not in a place to shift.
05-31-06, 03:16 AM
#31
Needs more Displacement.
Join Date: Jun 2005
Location: Louisville, Ky
Posts: 1,329
Likes: 0
Received 0 Likes
on
0 Posts
The stock turbo spools ridiculously quick... If your at 3k rpms coming out of corner then downshift to a lower gear so your at a higher rpm. Anything smaller and you'll be in boost at idle.
05-31-06, 10:23 AM
#33
Originally Posted by idsigloo
Use the stock turbo, keep the TMIC, heat wrap the manifold and housing. Ceramic coat the wheel and housing, full 3" exhaust, no intake/open turbo, port the exhaust in the housings, upgrade the bov (stock bpav leaks alittle)
GT28RS
http://www.importperformanceparts.ne...-garretts.html
http://www.turbobygarrett.com/turbob...S_739548_1.htm
GT28RS
http://www.importperformanceparts.ne...-garretts.html
http://www.turbobygarrett.com/turbob...S_739548_1.htm
what ever you do, don't listen to this guy.....Open turbo with no filter??? yeah your just asking to fire something threw the turbo and into your motor. Then you get to replace both.
06-01-06, 11:40 PM
#36
Junior Member
Join Date: Jul 2004
Location: Australia
Posts: 45
Likes: 0
Received 0 Likes
on
0 Posts
Thats interesting, I have a s5 with a, you guessed it, s5 highflow turbo, largest t04 internals you can fit without changing covers, and ported wastegate, and at that rpm range I usually have full boost.
It will start spooling at about 2500 - 3000 (depends on gear) and holds it all the way through the rev range.
It will start spooling at about 2500 - 3000 (depends on gear) and holds it all the way through the rev range.
06-02-06, 01:35 AM
#38
Junior Member
Join Date: Jul 2004
Location: Australia
Posts: 45
Likes: 0
Received 0 Likes
on
0 Posts
Another thing to note, I did have a turbo/mild port done to my engine, so that helps spool and hold boost better, but my car is fairly flat under 2500rpm, but the porting helps a lot IMHO.
Do you have a boost controller, and if so what type?
If you don't it could be the progressive way the turbo setups on an FC come on boost.
Compared to say my friends 180sx (240sx) with an SR20DET when it comes on boost its got a throw to it when boost comes on. Whereas my car is very linear and even though it gets to say 12 psi at 7000rpm earlier on, say 4000rpm i only seeing around 4-5psi. So it just keeps building boost instead.
An electronic boost controller may help, on most you can set how they come on boost (smooth and linear or rough and all at once).
Or (please don't start a fight about this) do you have a blow off valve? High revs + lots of boost, throttle snaps shut, turbo slows down, then WOT, turbo has to spool again? Used to happen to me when my stock BOV started to die and I ran more boost. 3rd to 4th full boost, lost all cos the BOV was rooted.
Sorry for the long *** post!
I may be way off though....
just a thought
Do you have a boost controller, and if so what type?
If you don't it could be the progressive way the turbo setups on an FC come on boost.
Compared to say my friends 180sx (240sx) with an SR20DET when it comes on boost its got a throw to it when boost comes on. Whereas my car is very linear and even though it gets to say 12 psi at 7000rpm earlier on, say 4000rpm i only seeing around 4-5psi. So it just keeps building boost instead.
An electronic boost controller may help, on most you can set how they come on boost (smooth and linear or rough and all at once).
Or (please don't start a fight about this) do you have a blow off valve? High revs + lots of boost, throttle snaps shut, turbo slows down, then WOT, turbo has to spool again? Used to happen to me when my stock BOV started to die and I ran more boost. 3rd to 4th full boost, lost all cos the BOV was rooted.
Sorry for the long *** post!
I may be way off though....
just a thought
06-02-06, 01:45 AM
#39
Needs more Displacement.
Join Date: Jun 2005
Location: Louisville, Ky
Posts: 1,329
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Bukwild
what ever you do, don't listen to this guy.....Open turbo with no filter??? yeah your just asking to fire something threw the turbo and into your motor. Then you get to replace both.
06-02-06, 02:54 AM
#42
Lives on the Forum
How fast do you need to spool the turbo???
There's a delicate balance between turbo spool and top-end power.
Once will always suffer when you're sizing turbos.
A GT35R with the smaller 0.86(?) turbine A / R should spool like a **** on a 13B.
If not, dropping down to a smaller GT30R should get the turbo to spool in the 2,xxxRPM range.
I agree - if you're worried about turbo lag, why not go SUPERCHARGER???
-Ted
There's a delicate balance between turbo spool and top-end power.
Once will always suffer when you're sizing turbos.
A GT35R with the smaller 0.86(?) turbine A / R should spool like a **** on a 13B.
If not, dropping down to a smaller GT30R should get the turbo to spool in the 2,xxxRPM range.
I agree - if you're worried about turbo lag, why not go SUPERCHARGER???
-Ted
06-02-06, 01:12 PM
#43
Theres something wrong with his turbo. If you want ridiculous spool, a simple hybrid with a free flowing filter and TID along with a 90mm exhaust and you'll be cruising along and in boost. Say bye to gas mileage. Want faster spool yet? street port and run high comp rotors. Then litterally you'll be in boost all the damn time. (don't believe me, talk with BlueTII and or Kevin from Rotary Ressurection). I have yet encountered any auto X track in a stock TII were I fell off boost (with an aftermarket exhaust). You need to fix your turbo or learn to drive differently. That or do a V8 swap or super charger *cringe*.
~Mike............
~Mike............
