Building for response, gt35r too laggy for me?
Thread Starter
Senior Member
Joined: Feb 2009
Posts: 290
Likes: 1
From: Victoria B.C.
Building for response, gt35r too laggy for me?
Looking at going to a bigger single (for my upcomming build, either s5 streetport or s6 streeport) but worried about losing the response I get. I'm basically at looking for a new build to give me what I have now (stock ht18(s5) with a tuned 13bt(s5)) but with more power. Top end is lacking due to the small turbo.
People seemed to concerned with high hp numbers whereas I like the fact that I have boost on demand with no wait. I've driven a bunch of SR20 and RB20 powered cars and the are all laggy, with that automatic shifter feel to them when you press on the gas (even in stock form)
I've gone from an n/a rotary to my turbo one and frankly didnt notice any lag what so ever. Although, my car wasn't purchased stock so i dont know what it is like stock, all i know is that this ht18 is too small and the motor gets chocked off after 5500rpm :P.
Basically looking for a good middle ground, but everything I read and hear and search for ends up with "gt35r" or something equivalent. So I'm thinking about getting a divided t4 flanged turbo with smaller AR I guess? Any suggestions? (as for numbers are concerned, i'd be happy with a responsive 300-400hp car
)
People seemed to concerned with high hp numbers whereas I like the fact that I have boost on demand with no wait. I've driven a bunch of SR20 and RB20 powered cars and the are all laggy, with that automatic shifter feel to them when you press on the gas (even in stock form)
I've gone from an n/a rotary to my turbo one and frankly didnt notice any lag what so ever. Although, my car wasn't purchased stock so i dont know what it is like stock, all i know is that this ht18 is too small and the motor gets chocked off after 5500rpm :P.
Basically looking for a good middle ground, but everything I read and hear and search for ends up with "gt35r" or something equivalent. So I'm thinking about getting a divided t4 flanged turbo with smaller AR I guess? Any suggestions? (as for numbers are concerned, i'd be happy with a responsive 300-400hp car
)
57 trim to4E mated to a P trim wheel in a .84 T4 housing, in my experience 1 bar by 2700rpms, and flat torque curve to 6700rpms, and only slightly trailing off from there. Makes 380rwhp @ 1 bar. Got tons of them in stock here, along with most every other Garrett turbo..
Thread Starter
Senior Member
Joined: Feb 2009
Posts: 290
Likes: 1
From: Victoria B.C.
Basically, if I'm at 3000-4000rpm in vacuum and hammer the throttle, there shouldnt be a wait time for the turbo to kick in. Basically, acts like an n/a. Which, my setup does at the moment. You wouldn't be able to tell my car was boosted until you let off the throttle and heard the BOV. I'm pretty sure this is 50/50 turbo size(mine is too small) and rotary "magic". (I have owned an n/a FC, and am comparing the response feeling from my current (newer) turbo fc to that. Also I have driven a streetported FD with stock twins that were working properly and it was identical in feel, just more power form the FD :P)
57 trim to4E mated to a P trim wheel in a .84 T4 housing, in my experience 1 bar by 2700rpms, and flat torque curve to 6700rpms, and only slightly trailing off from there. Makes 380rwhp @ 1 bar. Got tons of them in stock here, along with most every other Garrett turbo..
Even my large 1.06 AFR T3 turbine in my GT35R Fd takes off like a rocket at 3k. That is with stock ports.
For better response, use a smaller AR turbine.
Your turbo/setup/tune just sucks!
For better response, use a smaller AR turbine.
Your turbo/setup/tune just sucks!
Joined: Oct 2001
Posts: 6,279
Likes: 728
From: Florence, Alabama
"By laggy I mean throttle response. I dont care when I get full boost by, as long as the throttle response is there."
sure. i understand exactly what you mean. you will be seriously happy when you stand on the right pedal w a GT35 type setup. lag/ throttle responsiveness will not be an issue.
the only issue is your grin might just lock up your face muscles.
if a grin last more than 4 hours call your doctor.
also some good advice above as to turbo selection...
hc
sure. i understand exactly what you mean. you will be seriously happy when you stand on the right pedal w a GT35 type setup. lag/ throttle responsiveness will not be an issue.
the only issue is your grin might just lock up your face muscles.
if a grin last more than 4 hours call your doctor.
also some good advice above as to turbo selection...
hc
Joined: May 2005
Posts: 2,745
Likes: 0
From: North Bay, Ontario
Go with Turblown's recommendation, but in Ball bearing to increase transient response. You will be very pleased! And being T4 it will still give you room to grow quite easily when you're looking for "just a bit more"
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On a 12A
13psi @ 3000rpm
19psi @ 3950rpm
It is wicked responsive and fast especially in such a light car. All it is is a v-trim compressor on the front of a factory hitachi. If I want to do an overtake, I can do it in either 4th or 5th even at such a low speed as 80kph/50mph. Cruising on the highway it is on boost instantly. If I come to a hill the turbo spools by itself and might require 1mm extra throttle to hold even accelerate up a steep hill at high speed.
You can see I've started to play with some decent boost (1.5bar / 22psi). In reality I'm spinning the 'fck' out of that turbo. To put it into perspective, my engine is drinking an entire 044 worth of E85, and there is that much hot airflow my charge temp rises to 82degC (200degF) when traveling at 124mph/200kph
You could 'take on my lesson' and use either something like a
GTX3071R w/ divided T3 1.06 exhaust housing
GTX3576R w/ divided T3 1.06 exhaust housing
If you want response in my opinion use a turbo 'critically sized' and then boost the living daylights out of it.
13psi @ 3000rpm
19psi @ 3950rpm
It is wicked responsive and fast especially in such a light car. All it is is a v-trim compressor on the front of a factory hitachi. If I want to do an overtake, I can do it in either 4th or 5th even at such a low speed as 80kph/50mph. Cruising on the highway it is on boost instantly. If I come to a hill the turbo spools by itself and might require 1mm extra throttle to hold even accelerate up a steep hill at high speed.
You can see I've started to play with some decent boost (1.5bar / 22psi). In reality I'm spinning the 'fck' out of that turbo. To put it into perspective, my engine is drinking an entire 044 worth of E85, and there is that much hot airflow my charge temp rises to 82degC (200degF) when traveling at 124mph/200kph
You could 'take on my lesson' and use either something like a
GTX3071R w/ divided T3 1.06 exhaust housing
GTX3576R w/ divided T3 1.06 exhaust housing
If you want response in my opinion use a turbo 'critically sized' and then boost the living daylights out of it.
Joined: Mar 2001
Posts: 31,837
Likes: 3,234
From: https://www2.mazda.com/en/100th/
57 trim to4E mated to a P trim wheel in a .84 T4 housing, in my experience 1 bar by 2700rpms, and flat torque curve to 6700rpms, and only slightly trailing off from there. Makes 380rwhp @ 1 bar. Got tons of them in stock here, along with most every other Garrett turbo..
On a 12A
13psi @ 3000rpm
19psi @ 3950rpm
It is wicked responsive and fast especially in such a light car. All it is is a v-trim compressor on the front of a factory hitachi. If I want to do an overtake, I can do it in either 4th or 5th even at such a low speed as 80kph/50mph. Cruising on the highway it is on boost instantly. If I come to a hill the turbo spools by itself and might require 1mm extra throttle to hold even accelerate up a steep hill at high speed.
You can see I've started to play with some decent boost (1.5bar / 22psi). In reality I'm spinning the 'fck' out of that turbo. To put it into perspective, my engine is drinking an entire 044 worth of E85, and there is that much hot airflow my charge temp rises to 82degC (200degF) when traveling at 124mph/200kph
You could 'take on my lesson' and use either something like a
GTX3071R w/ divided T3 1.06 exhaust housing
GTX3576R w/ divided T3 1.06 exhaust housing
If you want response in my opinion use a turbo 'critically sized' and then boost the living daylights out of it.
13psi @ 3000rpm
19psi @ 3950rpm
It is wicked responsive and fast especially in such a light car. All it is is a v-trim compressor on the front of a factory hitachi. If I want to do an overtake, I can do it in either 4th or 5th even at such a low speed as 80kph/50mph. Cruising on the highway it is on boost instantly. If I come to a hill the turbo spools by itself and might require 1mm extra throttle to hold even accelerate up a steep hill at high speed.
You can see I've started to play with some decent boost (1.5bar / 22psi). In reality I'm spinning the 'fck' out of that turbo. To put it into perspective, my engine is drinking an entire 044 worth of E85, and there is that much hot airflow my charge temp rises to 82degC (200degF) when traveling at 124mph/200kph
You could 'take on my lesson' and use either something like a
GTX3071R w/ divided T3 1.06 exhaust housing
GTX3576R w/ divided T3 1.06 exhaust housing
If you want response in my opinion use a turbo 'critically sized' and then boost the living daylights out of it.
I thought my billet 3586 T3 1.06 was too small but for the street it is always right there no matter what gear or RPM (assuming its not at 2k in 5th). Made over 470 @23psi.
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