| Silver Bullet 02 | 01-23-2004 10:32 AM |
What is the best SM (autocross) turbo?? SR30? VF23? VF35? Other???
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Just wondering what you guys thing would make the best SM turbo. I'm wanting something that gives near factory spool for the tight courses and more top end for the more open courses. So far it seems that the SR30 probably does the best but it seems all but impossible to get objective info. So... I'm wonderin what you guys would get if you have any choice you wanted.
Supporting drivetrain mods:
Unichip with boost control
IC water spray
STi RA V6 gear set
Quaife front diff
APS CAI and Exhaust
Catless uppipe
Please give reasons for your pick and any numbers that you know for a fact...
Supporting drivetrain mods:
Unichip with boost control
IC water spray
STi RA V6 gear set
Quaife front diff
APS CAI and Exhaust
Catless uppipe
Please give reasons for your pick and any numbers that you know for a fact...
| dwx | 01-23-2004 10:56 AM |
Get an EJ257 short block.
| Silver Bullet 02 | 01-23-2004 11:33 AM |
[QUOTE][i]Originally posted by dwx [/i]
[B]Get an EJ257 short block. [/B][/QUOTE]
If you can sell me a working EJ257 for the price of a turbo then I'll consider that option ;-)
[B]Get an EJ257 short block. [/B][/QUOTE]
If you can sell me a working EJ257 for the price of a turbo then I'll consider that option ;-)
| SLKWrx | 01-23-2004 11:46 AM |
... That'd be one expensive turbo.. :)
On a real note, I haven't tried the SR30, but the 35 and the 23 are both amazing turbos. I have taken them both out in different cars. I'd say the 35 is more capable for the auto-x.. though for a street/SM auto-x car, I'd go for the 23.
On a real note, I haven't tried the SR30, but the 35 and the 23 are both amazing turbos. I have taken them both out in different cars. I'd say the 35 is more capable for the auto-x.. though for a street/SM auto-x car, I'd go for the 23.
| AWMIII | 01-23-2004 04:24 PM |
I had a vf29 it worked well.
| Silver Bullet 02 | 01-23-2004 04:32 PM |
Any dyno plots of cars guys? I'm pretty sure the VF23 spools around 500 rpms later than the stock TD04 which would be bad on most autocross courses.
This link [url]http://www.clubwrx.net/forums/showthread.php?threadid=32017&perpage=20&highlight=sr30&pagenumber=2[/url] shows a VF35 compared to the stock turbo. You have to go to the second page and down about 1/4 page for the dyno plots.
I got an email from an APS distributor in AU who said that the SR30 reaches 1bar at 2800 rpm vs. 2600 rpm for the TD04. I don't know if I believe that or not. If it is true then the SR30 may be the best choice.
For the tight courses I'm thinking a ported and polished TD04 would be best. For national type courses I think maybe the VF35 or VF23 may be better.
I sure would like to see dyno plots for all of the quicker spooling turbos.
This link [url]http://www.clubwrx.net/forums/showthread.php?threadid=32017&perpage=20&highlight=sr30&pagenumber=2[/url] shows a VF35 compared to the stock turbo. You have to go to the second page and down about 1/4 page for the dyno plots.
I got an email from an APS distributor in AU who said that the SR30 reaches 1bar at 2800 rpm vs. 2600 rpm for the TD04. I don't know if I believe that or not. If it is true then the SR30 may be the best choice.
For the tight courses I'm thinking a ported and polished TD04 would be best. For national type courses I think maybe the VF35 or VF23 may be better.
I sure would like to see dyno plots for all of the quicker spooling turbos.
| Kha0S | 01-23-2004 04:36 PM |
The VF34 is always an option...
/Andrew
/Andrew
| EJ20K | 01-23-2004 04:57 PM |
the only turbo with a spool "close" to the stock TD04 is the VF35 ..... ;)
EJ20K
EJ20K
| thechickencow | 01-24-2004 01:49 AM |
[QUOTE][i]Originally posted by Silver Bullet 02 [/i]
[B]If you can sell me a working EJ257 for the price of a turbo then I'll consider that option ;-) [/B][/QUOTE]
Well, the shortblock will cost you less than a SR40. Buy it!
[B]If you can sell me a working EJ257 for the price of a turbo then I'll consider that option ;-) [/B][/QUOTE]
Well, the shortblock will cost you less than a SR40. Buy it!
| BIGSKYWRX | 01-24-2004 10:08 PM |
I've never heard of the SR30 spooling that fast, possible, but you'd think you'd hear about it.
I think the 24/28/29 series w/ 46.7mm compressor sides and P18 exhaust (ball bearing as well) or the 35 slightly larger compressor w/ a P15 exhaust would fit the bill nicely.
I've seen some good dyno's w/ the 35 and while none of these will be as fast as the TD04- they're getting close w/ pretty significant torque gains.
Your gearing will make up some ground for the little additional lag.
Someone was getting a 35 rebuilt (coated as well) w/ a ball bearing center, was going to cost, but I bet that would be a dandy.
Big Sky
I think the 24/28/29 series w/ 46.7mm compressor sides and P18 exhaust (ball bearing as well) or the 35 slightly larger compressor w/ a P15 exhaust would fit the bill nicely.
I've seen some good dyno's w/ the 35 and while none of these will be as fast as the TD04- they're getting close w/ pretty significant torque gains.
Your gearing will make up some ground for the little additional lag.
Someone was getting a 35 rebuilt (coated as well) w/ a ball bearing center, was going to cost, but I bet that would be a dandy.
Big Sky
| Templar | 01-24-2004 11:47 PM |
Just remember, either don't spray the IC on course, or don't get caught doing it. :D
| exhacker | 01-25-2004 06:07 AM |
[QUOTE][i]Originally posted by Templar [/i]
[B]Just remember, either don't spray the IC on course, or don't get caught doing it. :D [/B][/QUOTE]
You can spray with an external bottle (like a iced-down pest sprayer) from what i understand.... check the rules, but i think this is acceptable to do before and after your runs.
Try out a ported TD04... you might be surprised with the results. From what i understand, it simply widens the powerband by shifting the torque peak lower in the RPMs, but peak HP remains virtually the same as stock.
[B]Just remember, either don't spray the IC on course, or don't get caught doing it. :D [/B][/QUOTE]
You can spray with an external bottle (like a iced-down pest sprayer) from what i understand.... check the rules, but i think this is acceptable to do before and after your runs.
Try out a ported TD04... you might be surprised with the results. From what i understand, it simply widens the powerband by shifting the torque peak lower in the RPMs, but peak HP remains virtually the same as stock.
| cdvma | 01-25-2004 09:04 AM |
I'd say port and polish your exhaust ports and the turbo exhaust housing. It will spool faster than any of those turbos and will give you a nice powerband for very cheap. I dont see how any more power than the stock turbo on an auto-x can help more than a good set of tires. I'd say port & polish and tires.
| Uber Wagon | 01-25-2004 01:19 PM |
Isn't conebasher a 2.5L with an SR40? From the looks of the APS website even the SR50 was spooling up better than the VF39 on the stock STi.
For us 2.5L folks maybe an SR40 or even an SR50 are the way to go....
For us 2.5L folks maybe an SR40 or even an SR50 are the way to go....
| dwx | 01-25-2004 01:42 PM |
On a 2L I really liked the VF29. I tried both a SR30, VF29, and a iON Stage 1 turbo. All of them spooled just about the same, around 2900-3000 rpm to hit full boost, on my car at least. The SR30 is a nice turbo and the car was fast with it, but it's just not worth the price premium over the VF29. It was almost twice the cost of the VF29 at the time. VF35 and a VF29 would also be similar. I made around 260whp/255ft-lbs on Godspeed's dynapack with the VF29.
On the STI the SR40 looks like a good choice. The SR50 I think is still laggy, even on the 2.5. If you do proper mods and use non-stock boost control then the VF39 is going to spool faster than either of them. You can't really compare the graph of a bone stock car to one with modified tuning/boost control/mods/etc.
On the STI the SR40 looks like a good choice. The SR50 I think is still laggy, even on the 2.5. If you do proper mods and use non-stock boost control then the VF39 is going to spool faster than either of them. You can't really compare the graph of a bone stock car to one with modified tuning/boost control/mods/etc.
| camz911 | 02-10-2004 01:29 PM |
if you're talking autocross, why would the sr50 even be an option?
obviously you want a fast spooling turbo that will still pack a decent punch. I've got an Ion stg0 dyno tuned to 246whp. The thing spools really really fast with an upp and dp. anyways, its your car, do what you want.
obviously you want a fast spooling turbo that will still pack a decent punch. I've got an Ion stg0 dyno tuned to 246whp. The thing spools really really fast with an upp and dp. anyways, its your car, do what you want.
| TeamEAD | 11-08-2005 12:13 PM |
Stay away from the sr30. For multiple reasons. If you are going to build a motor, sleeve it to hold over 20 psi and only use race gas in it then the sr30 is perfect. If you're keeping stock internals then go with the 35 or an fp green or something like it.
| KCRex | 11-08-2005 03:30 PM |
I use an 8cm 18g in my SM auto-xer. Works pretty well, would be even better with the RA gearset (or a 2.5)
| jmott | 11-08-2005 04:26 PM |
On a 2.0L motor, I wouldn't go bigger than the stock turbo unless you can drive in such a way as to keep it spooled (left foot braking while staying on the gas a little)
| Homemade WRX | 11-08-2005 05:31 PM |
I'm trying to think of what tuner posted it. I think it was i-speed but it was of one of there "stage 2" blocks and a stock td04 and the thing would have been a pretty awesome auto-x set up...
edit: [url]http://forums.nasioc.com/forums/showthread.php?t=861367[/url]
edit: [url]http://forums.nasioc.com/forums/showthread.php?t=861367[/url]
| Silver Bullet 02 | 11-08-2005 05:52 PM |
Wow... this thread has been revived after over a year...
I almost bought a VF35 and a bigger intercooler but after looking at the dyno plots I felt the 35 would still have less power under 3000 rpm and a lot of our courses keep you under 3000 rpm long enough for it to be a big consideration.
I dreamed of a stroked 2.5 with torque to spare and lots of breath for to spool up a decent sized turbo quickly... but instead I got married and don't have the time for auto-x anymore so I'm selling my car :huh:
[url]http://forums.nasioc.com/forums/showthread.php?t=869101[/url]
I almost bought a VF35 and a bigger intercooler but after looking at the dyno plots I felt the 35 would still have less power under 3000 rpm and a lot of our courses keep you under 3000 rpm long enough for it to be a big consideration.
I dreamed of a stroked 2.5 with torque to spare and lots of breath for to spool up a decent sized turbo quickly... but instead I got married and don't have the time for auto-x anymore so I'm selling my car :huh:
[url]http://forums.nasioc.com/forums/showthread.php?t=869101[/url]
| Pacobeagle | 11-08-2005 06:00 PM |
my current setup is the USDM Sti shortblock on WRX heads and a VF22. I also have the Sti-Ra gearset. I'll shortly be purchasing a Quaife rear diff and the front as well.
| TyrannoSullyRex | 11-08-2005 06:03 PM |
A BMW with a twin-screw supercharger (and a surreptitiously reinforced rear subframe).
Wait, what was the question?
Wait, what was the question?
| Silver Bullet 02 | 11-08-2005 06:05 PM |
[QUOTE=Pacobeagle1]my current setup is the USDM Sti shortblock on WRX heads and a VF22. I also have the Sti-Ra gearset. I'll shortly be purchasing a Quaife rear diff and the front as well.[/QUOTE]
The Quaife is great in the front but will probably give you less than the stock diff performance in the rear. Quaife's rely on at least one tire having traction. If one tire loses most of its traction then it won't send much torque to the other side. A properly setup WRX will lift the inside rear tire in a turn rendering a Quaife useless. You need a clutch type if anything or just stick with the stocker.
Sorry for veering off post but just wanting to save you some $$ and disappointment
The Quaife is great in the front but will probably give you less than the stock diff performance in the rear. Quaife's rely on at least one tire having traction. If one tire loses most of its traction then it won't send much torque to the other side. A properly setup WRX will lift the inside rear tire in a turn rendering a Quaife useless. You need a clutch type if anything or just stick with the stocker.
Sorry for veering off post but just wanting to save you some $$ and disappointment
| Butt Dyno | 11-08-2005 07:49 PM |
Ver8 twinscroll setup + VF36/37?
If you're gonna run SM, why screw around :)
If you're gonna run SM, why screw around :)
| TeamEAD | 11-08-2005 10:34 PM |
I like your style ButtDyno!
| Homemade WRX | 11-08-2005 11:33 PM |
[QUOTE=ButtDyno]Ver8 twinscroll setup + VF36/37?
If you're gonna run SM, why screw around :)[/QUOTE]
why screw with that...get anti-lag...it's just waiting for you to hit the gas... :devil:
If you're gonna run SM, why screw around :)[/QUOTE]
why screw with that...get anti-lag...it's just waiting for you to hit the gas... :devil:
| hyp36rmax | 11-09-2005 01:17 PM |
my desktop has plans for a 2.5L + TD05 Super16G + Crower STG2 Cams, concensus on this? :-)
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