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View Full Version : Power Mods which turbo would you go with GT42R OR borg s300


getherdone
10-24-2009, 03:59 PM
Let me know what you guys think :goodjob:. i know the gt42 is like 1200 more but i heard there almost the same.
Master Shake
10-24-2009, 04:33 PM
what are your power goals? cause those things are capable of support like 1k hp.
crashtke
10-24-2009, 04:34 PM
I love the Bullseye Borg Warners and they are what I designed my rotated kit around for the Subarus. The spool is faster than comparable garretts and they can put out some serious power. What whp are you shooting for?
getherdone
10-24-2009, 05:12 PM
hp goals are around 650 to 700
crashtke
10-24-2009, 05:33 PM
What car/motor is it? I would guess the Bullseye S366 would get you to those goals. Just give them a call. David is great. I used to use another company that sold the Borg warner stuff and I will never switch. Bullseye has been great and really taken care of me. Customer service is top notch and they will stand behind their products.
getherdone
10-24-2009, 05:40 PM
What car/motor is it? I would guess the Bullseye S366 would get you to those goals. Just give them a call. David is great. I used to use another company that sold the Borg warner stuff and I will never switch. Bullseye has been great and really taken care of me. Customer service is top notch and they will stand behind their products.
built gsr
crashtke
10-24-2009, 05:49 PM
1.8 liter motor though? Or are you swapping something in?
getherdone
10-24-2009, 06:15 PM
1.8
crashtke
10-24-2009, 07:09 PM
The way I calculate it either the 372 or the 374 running a PR of 3.8 and ramping up as you go towards redline. That should put you in the meat of the compressor map. But I would ask David at Bullseye. He has been working with these turbos longer than I have and may have actually put one on a 1.8 in that hp range before.
getherdone
10-24-2009, 07:11 PM
The way I calculate it either the 372 or the 374 running a PR of 3.8 and ramping up as you go towards redline. That should put you in the meat of the compressor map. But I would ask David at Bullseye. He has been working with these turbos longer than I have and may have actually put one on a 1.8 in that hp range before.well i got the gt42r now and the guy said it had a gt35r hot side. so i was wondering if its gonna be a waste of time to use it
B18c1Turboed
10-24-2009, 07:13 PM
MY old 42r on gsr motor...
crashtke
10-24-2009, 07:21 PM
S372 on a honda dyno

http://www.bullseyepower.com/testdata/td_JasonHunt.asp
crashtke
10-24-2009, 07:25 PM
well i got the gt42r now and the guy said it had a gt35r hot side. so i was wondering if its gonna be a waste of time to use it

What AR is the housing? If it is a standard t3 housing you are limited to around 700-750 max and that is pushing it to the limits. I honestly would switch to a t4 housing and open it up.
B18c1Turboed
10-24-2009, 07:33 PM
What AR is the housing? If it is a standard t3 housing you are limited to around 700-750 max and that is pushing it to the limits. I honestly would switch to a t4 housing and open it up.

Depends on what the use of the car will be... If its a street driven car, keep it the way it is. If not time too upgrade it...

I love my s372 turbo. It made amazing power at low boost here my last year dyno chart on the gt42r turbo , was about 38psi
getherdone
10-24-2009, 08:10 PM
^^^for some reason i ant see the dyno chart
getherdone
10-24-2009, 08:11 PM
What AR is the housing? If it is a standard t3 housing you are limited to around 700-750 max and that is pushing it to the limits. I honestly would switch to a t4 housing and open it up.
the cold side says a/r.60 hot side says a/r .70
crashtke
10-24-2009, 09:19 PM
.70 would be a great street turbo, and should make 600's I would think.

On the chart above what is the red run vs the blue one? And why the breakages in the chart?