sts kit: gt67 vs base turbo(T60?)
07-23-2005, 02:13 PM
#1
Launching!
Thread Starter
iTrader: (1)
Join Date: Jun 2002
Location: San Luis Obispo, CA
Posts: 255
Likes: 0
Received 0 Likes
on
0 Posts
sts kit: gt67 vs base turbo(T60?) i'm going to be ordering the STS kit for my car this week. it's only a bolt-on car (mods in sig) but i'm adding this to it:
918 springs
comp TI retainers
comp chromoly PR
42# inj
racetronix fuel pump
sts kit at 6psi
dyno tuning by sts dealer
I'm aiming for 425rwhp (for now)
with no IC (maybe in a year or so when my wallet recovers)
my car is a daily driver so i want to stay on the safe side of the lower end and rear ends' power limits. should i get the gt67?
I've heard that the spool time is a bit longer (~4k) vs the base turbo (~3k) but that the base turbo falls off after 5k rpm. i'd like to have something that spools quickly (DD) but with my valvetrain/fuel upgrades could i raise the rev limiter and take it to 6600rpm? would this mean i should get the gt67?
Sorry for asking what seems a common question. I've searched, but every post is talking about going for BIG numbers and with different circumstances then mine.
Thanks!
918 springs
comp TI retainers
comp chromoly PR
42# inj
racetronix fuel pump
sts kit at 6psi
dyno tuning by sts dealer
I'm aiming for 425rwhp (for now)
with no IC (maybe in a year or so when my wallet recovers)
my car is a daily driver so i want to stay on the safe side of the lower end and rear ends' power limits. should i get the gt67?
I've heard that the spool time is a bit longer (~4k) vs the base turbo (~3k) but that the base turbo falls off after 5k rpm. i'd like to have something that spools quickly (DD) but with my valvetrain/fuel upgrades could i raise the rev limiter and take it to 6600rpm? would this mean i should get the gt67?
Sorry for asking what seems a common question. I've searched, but every post is talking about going for BIG numbers and with different circumstances then mine.
Thanks!
07-23-2005, 02:42 PM
#2
I've got the first LS2GTO STS kit (pre-release...ready to install and get tuned within the next 1-2 weeks...) and am using the GT67 + I/C...also methanol injection, injectors, fuel pump mods. The updgrade is not only bigger, but it is a better quality turbo as well. I have not heard of much difference in spool up...and these engines have pretty good low end as they sit, anyway.
The best bang for the buck would be to add a methanol kit. There are several out there, and I am trying a kit that hasn't been used on a GTO yet. For $300-400, you can run more boost and timing => more HP. Also, you've got good valvetrain upgrades...if you feel like doing the work, getting CompCams or Ed Curtis to custom grind you a mild turbo cam, you'd love it!
Although I am using the STS intercooler, I would bet you could get a custom spearco or other that would cost a bit less. And I realize that this add'l stuff is "down the road".
The best bang for the buck would be to add a methanol kit. There are several out there, and I am trying a kit that hasn't been used on a GTO yet. For $300-400, you can run more boost and timing => more HP. Also, you've got good valvetrain upgrades...if you feel like doing the work, getting CompCams or Ed Curtis to custom grind you a mild turbo cam, you'd love it!
Although I am using the STS intercooler, I would bet you could get a custom spearco or other that would cost a bit less. And I realize that this add'l stuff is "down the road".
07-23-2005, 03:46 PM
#3
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: West Palm Beach, FL
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
The base turbo does fall off above about 5200 rpm on my car. I would say if you plan on turning the boost up, it makes sense to get the upgraded turbo now, even though the base turbo will work fine at 6 psi. By the way, my intercooler was only $300 off Ebay. Not much $$ to be able to run 8 psi.
07-23-2005, 04:02 PM
#4
Launching!
Thread Starter
iTrader: (1)
Join Date: Jun 2002
Location: San Luis Obispo, CA
Posts: 255
Likes: 0
Received 0 Likes
on
0 Posts
wow $300 for an intercooler? does that include the piping? (if so do you have a list of the parts/bends needed?) thanks! i plan to maybe go 7 or 8 after i get an intercooler in like a year or two. I don't know how much more than that the stock bottom end can take so i'm not looking for huge amounts of boost. but i don't want the car to fall on its face above 5000 but want the boost to kick in below 4000rpm too.
07-23-2005, 04:22 PM
#5
TECH Enthusiast
iTrader: (1)
Join Date: Sep 2004
Location: West Palm Beach, FL
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
Oops sorry, that doesn't include the piping. It cost me $400 to have a shop custom fab the piping for me. Sorry, I should have mentioned that before. If your compression ration is stock, you should be fine with 8 psi. Matter of fact, you'll be in good shape because of the valvetrain upgrades. I had to turn my boost down because I was getting a lot of valve float at 8 psi. But, once I uprgrade that, I'm ready for 8 psi.
By the way, if your planning on turning the boost up, you may want to consider going with 60# injectors from the get go. I have the 42's, and they were reaching there limits at 8 psi.
By the way, if your planning on turning the boost up, you may want to consider going with 60# injectors from the get go. I have the 42's, and they were reaching there limits at 8 psi.
07-23-2005, 04:43 PM
#6
TECH Addict
iTrader: (9)
Join Date: Dec 2004
Location: calallen,tx
Posts: 2,409
Likes: 0
Received 0 Likes
on
0 Posts
i went from a t60 to gt67 turbo also and it made a big diffrence on my truck and would recommend it...also billy at trtturbo has 200$ intercoolers.i even saw where he has the 4" inlet coolers...they work very good
Trending Topics
07-25-2005, 02:18 PM
#9
9 Second Club
iTrader: (2)
Join Date: Jun 2005
Location: Reston, VA
Posts: 2,034
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by NYSS Guy
By the way, if your planning on turning the boost up, you may want to consider going with 60# injectors from the get go. I have the 42's, and they were reaching there limits at 8 psi.
07-25-2005, 04:34 PM
#10
Originally Posted by longrange4u
Your maxing out your 42# injectors... on 8lbs of Boost?
07-25-2005, 07:22 PM
#12
Originally Posted by geegro05
Would one of these OBX IC work on the GTO?
