jaydim

set-up is full port and polish head, 6 angle valve job, ctr cams, jg edelbrock mf, 70mm tb, Golden Eagle sleve, 84mm weisco pistons, pauter rods ect, my power goals are from 650 to 700+hp, but i cant decide to go with the 35r or t67 cause of spool, is there really a major diffrence in spool, just tring to get peoples experinces with this turbos
thanks pps

tony1

Your motor will still have a pretty big powerband with the T67, and it is much more likely to make 650-700whp.

And i'd go with a T4T67 if you don't have a manifold yet. The T4 housing leaves you a lot more options on turbine housings, and they have a v band turbine discharge, which is a big plus.

jaydim

Thanks tony, i all ready have a top mount with t3 flange, so a t67 will be lagy for the street

tony1

Not too laggy, as long as you don't still have a stock redline, it'll be fine.

jaydim

how about in low rpms

tony1

Well, it won't make boost at 3k. There are a lot of things that affect turbo spool. A bigger turbo is going to spool slower and make more power 90% of the time. Just the nature of the beast. There are ways to get more of both power and spool, but they generally involve more exotic turbo setups, like bigger GT turbos and properly build twin scroll manifold setups, which all costs more money. My race car makes 28psi by 5500rpms, and makes over 800whp, neither of which a regular T67 will do.

jaydim

this is the turbo iam planing to get, a friend of mine has a gt35r and at low rpms its all ready starting to wisel
http://www.full-race.com/catal...ae692

ek9t72

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Well, it won't make boost at 3k. There are a lot of things that affect turbo spool. A bigger turbo is going to spool slower and make more power 90% of the time. Just the nature of the beast. There are ways to get more of both power and spool, but they generally involve more exotic turbo setups, like bigger GT turbos and properly build twin scroll manifold setups, which all costs more money. My race car makes 28psi by 5500rpms, and makes over 800whp, neither of which a regular T67 will do. </TD></TR></TABLE>hey tony I know that you are a garrett turbo man ...I got a very similar set up with a t76bb s/trim with a .84a/r with a peak boost top mount with a split turbine housing how much power you think it will make at 30/35 psi

jaydim

or how about this one

http://www.full-race.com/catal...ae692

bseries_ben

is there a resource that shows different spools on different turbos and different setups? i'm looking at putting together a kit for a completely stock itr motor. i was thinking either a gt28r or 35r. i've heard itr's spool quickly, you guys have any idea when these might spool on a stock itr? i've been trying to find graphs of a similar setup but i'm having some difficulty.

under_boost

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bseries_ben &raquo;</TD></TR><TR><TD CLASS="quote">is there a resource that shows different spools on different turbos and different setups? i'm looking at putting together a kit for a completely stock itr motor. i was thinking either a gt28r or 35r. i've heard itr's spool quickly, you guys have any idea when these might spool on a stock itr? i've been trying to find graphs of a similar setup but i'm having some difficulty.</TD></TR></TABLE>

those 2 turbos are not even comparable. one is extremely fast spooling, and the other is a power monster.

you can get the t67 in a dbb chra. you can even run the 35r turbine wheel, with a t67 comp wheel, where lag will be almost identicle to the 35r, and make more power. i would personally run the ptrim turbine. pulling the car to 9500 will give a sweet power band with the t67.

tony1

I wouldn't go so far as to say there is a huge difference in spool between them, and i definitely wouldn't say that the 3567 spools the same as the 35!

bseries_ben

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by under_boost &raquo;</TD></TR><TR><TD CLASS="quote">

those 2 turbos are not even comparable. one is extremely fast spooling, and the other is a power monster.

you can get the t67 in a dbb chra. you can even run the 35r turbine wheel, with a t67 comp wheel, where lag will be almost identicle to the 35r, and make more power. i would personally run the ptrim turbine. pulling the car to 9500 will give a sweet power band with the t67. </TD></TR></TABLE> i'm not trying to rev to 9500 on a stock motor. im not a big enough baller to buy a new $4k motor in less than a year.

by extremely fast spooling, what do you mean? 3k? 4k? when would the powerband on the 28r run out? how about this: if i wanted boost by 4k and only wanted to rev to 8k, would a 28r be the best choice? i want something that spools quickly and it doesn't have to pull forever cause i dont' want to blow up my car so i'll only be revving to 8k and only be running 7-8psi but i'd like to have that 7-8psi full on by around 4-4.5k rpm

basically: is it realistic to expect good boost from 4-8k on a stock c5 w/a 28r?


Modified by bseries_ben at 12:01 PM 5/1/2007

96 GSR-T

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bseries_ben &raquo;</TD></TR><TR><TD CLASS="quote"> i'm not trying to rev to 9500 on a stock motor. im not a big enough baller to buy a new $4k motor in less than a year.

by extremely fast spooling, what do you mean? 3k? 4k? when would the powerband on the 28r run out? how about this: if i wanted boost by 4k and only wanted to rev to 8k, would a 28r be the best choice? i want something that spools quickly and it doesn't have to pull forever cause i dont' want to blow up my car so i'll only be revving to 8k and only be running 7-8psi but i'd like to have that 7-8psi full on by around 4-4.5k rpm

basically: is it realistic to expect good boost from 4-8k on a stock c5 w/a 28r?


Modified by bseries_ben at 12:01 PM 5/1/2007</TD></TR></TABLE>

start another thread

bseries_ben

yeah, sorry to jack your thread, guy. i talked to the owner of my local shop today and decided on a gt2876r. should hit full boost by about 3700 and go all the way to 8k w/no problems. /thread jacking

under_boost

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">I wouldn't go so far as to say there is a huge difference in spool between them, and i definitely wouldn't say that the 3567 spools the same as the 35!</TD></TR></TABLE>

you don't think there is a huge difference in spool between a 35r and a 28r? there is at least 1500+ rpm difference. i know you've been rocking a 42r in a race car...but jeez man.

the 3567 and 35r i mention lag, not spool. if you're talking about boost onset, there is ~maybe 300rpm difference. lag, defined after a shift, there should be none noticable between the 2.

and ben, i was referring to the op revving to 9500...not you.

bseries_ben

ahh, right on

tony1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by under_boost &raquo;</TD></TR><TR><TD CLASS="quote">

you don't think there is a huge difference in spool between a 35r and a 28r? there is at least 1500+ rpm difference. i know you've been rocking a 42r in a race car...but jeez man.

the 3567 and 35r i mention lag, not spool. if you're talking about boost onset, there is ~maybe 300rpm difference. lag, defined after a shift, there should be none noticable between the 2.

and ben, i was referring to the op revving to 9500...not you. </TD></TR></TABLE>

Where did you get 35r and 28r? We're talking about a 35r and a T67p.

And your definition of "lag" (defined after a shift) is what is called transient response....

96 GSR-T

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">

Where did you get 35r and 28r? We're talking about a 35r and a T67p.

And your definition of "lag" (defined after a shift) is what is called transient response....</TD></TR></TABLE>

Correctamundo!

under_boost

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">

Where did you get 35r and 28r? We're talking about a 35r and a T67p.

And your definition of "lag" (defined after a shift) is what is called transient response....</TD></TR></TABLE>

i responded to a post which asked the difference between a 28r and a 35r. in turn, it appeared you were responding to the post about the 28r and 35r.

regardless of what you would like to call lag...between the 2 turbos (3567 and a 35r) you won't notice a difference. should i be more clear? initial spool (from say...3k) yes, there will be a difference. i wasn't referring to this, as the only time you should measure the pull is on a dyno. i don't know any drag OR street cars which would run WAY out of the power band like this. do you?

tony1

Well, "lag" in my mind is about when the turbo starts making respectible boost, rpm wise. As in during a 4th gear dyno pull, which one will make target boost quicker. Transient response is how fast the turbo responds to transients, lol, as in after a shift.

you're right on the 28 vs. 35 thing, we were talking about two different things, and i agree, the 28 and 35 are not even similar.

I don't agree that you won't see a difference in "lag" between the two, the 35r will spool faster than the 3567, or have less "lag", however you want to look at it. It will also have worse transient response than the 35r.

jaydim

i think iam going to go with the gt35r, thanks pps

IT'S ME DAVID

iTrader: (1)

get the t4/t67 thats what im going with

sc4dr

He's got a t3 flange. I'd like to try the t3/t67bb myself.

IT'S ME DAVID

iTrader: (1)

get the t3/t67 H.o then..suppos to make 700hp