View Poll Results: What do you want?
GT35/40
74
73.27%
T-78
28
27.72%
Multiple Choice Poll. Voters: 101. You may not vote on this poll
Gt35/40 V.s. T-78
09-23-02, 09:46 PM
#76
Part out my Car
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well from posting that a while ago i have already left both of those turbos in the dust and made up my mind to be different and go with the new t70 bb from inovative. This is going to be my winter project, if the funds are avalable. Just thought i would update it. Ohhh ya the reason i chose this turbo is because itll make more power than a t78 but i think it can spool like the gt 35/40, time will tell.
Marc
Marc
09-24-02, 01:35 AM
#77
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having experienced both of these turbos on my car.. i would say without a doubt the GT35/40 is a much better choice for the "majority" of future and current single turbo owners.. The GT35/40 screams through the rev-band while the "lags" a bit
i perfer the GT35/40 over the T-78 if i had to chosse between the two..either way both turbos are sweet!
i perfer the GT35/40 over the T-78 if i had to chosse between the two..either way both turbos are sweet!
10-03-02, 04:50 PM
#79
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lag on the t-78 isnt that bad at all. If your cruising around at 40 mph in 4th gear and you stab it, of course you going to lag, but once you down shift your making boost and your going to stay in boost. Do you guys not like to down shift??? Its part of racing you know. I would perfer the gt70 myself.
10-03-02, 06:25 PM
#81
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ANYONE considering a T78 (or any other GReddy product) should check out my post on the damaged T78 turbine. https://www.rx7club.com/forum/showth...hreadid=120275
Essentially GReddy does not sell turbo parts, just entire turbos. None of the big shops I've talked to can rebuild this turbo due to lack of parts. This is much the same argument people use when dumping on the RX6. I have contacted numerous shops and turbo specialists and no one can rebuild it. Innovative called the T78 a piece of crap. I remember Gordon saying something to the extent Innovative didn't have anything superior to offer. How about either a full bb 61 or 66? Heck, I'd call a few places to find out if you can get Garrett parts for the 35/40 as well. Those XS T04 kits are looking better by the minute. Man am I pissed. Thanks for letting me vent :-)
Michel
Essentially GReddy does not sell turbo parts, just entire turbos. None of the big shops I've talked to can rebuild this turbo due to lack of parts. This is much the same argument people use when dumping on the RX6. I have contacted numerous shops and turbo specialists and no one can rebuild it. Innovative called the T78 a piece of crap. I remember Gordon saying something to the extent Innovative didn't have anything superior to offer. How about either a full bb 61 or 66? Heck, I'd call a few places to find out if you can get Garrett parts for the 35/40 as well. Those XS T04 kits are looking better by the minute. Man am I pissed. Thanks for letting me vent :-)
Michel
10-04-02, 12:59 AM
#82
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making 15 psi at 3600 rpm's, do you guys drive around turning about 2500 rpms or something??? How bout a Innovative T-76?? I like to race from 45-50 mph rolls, I guess that why I would rather have a big turbo(not saying that the gt 35/40 is small) BTW what do you think its going to cost to rebiuld the gt35/40??just curius
Whats the power band like on top end??
Whats the power band like on top end??
10-04-02, 05:36 AM
#84
Senior Member
Originally posted by 93redFD
what the web site for the innovative turbos????
what the web site for the innovative turbos????
10-04-02, 08:55 AM
#85
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Originally posted by ttpowerd
poweraxel, do you recommend the GT 3540 for track use. Not drag strip or street but what turbo would beat it at the track, if any?
poweraxel, do you recommend the GT 3540 for track use. Not drag strip or street but what turbo would beat it at the track, if any?
12-05-02, 07:00 PM
#93
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Originally posted by tk5dan
Does anyone have an update on the cheapest way to get the GT 35/40?
Does anyone have an update on the cheapest way to get the GT 35/40?
12-06-02, 07:50 PM
#94
Mad Man
93red, if you mix the large GT40 compressor with the smaller GT40 turbine, you are very close to a T66 Q trim 1.00 ar. A GT42 is larger than a T66 in every regard. I am working with a shop, and Garrett to produce a hybrid GT40, or a GT40/42 to produce a turbo capable of 550-600rwhp on a 2 rotor. The goal is full boost by 4000-4250rpm, we shall see... Unfortunately all of these turbos are very hard to come by. here is a quote from me, on NO Pistons forum,
"The more research I do the more I think I'd like to put a T66 in my car. At the same time I'd like to take advantage of the relatively low cost, and great performance of the Garrett GTBB series Turbos. With this in mind I've been comparing the specs on various GT turbos to the Turbonetics Q trim T66. I am basing this on a 1.00 ar T66 since I know of a couple of guys who are using it on a T66 with good results. A GT40 comes the closest, although the compressor turbine pairing in the Garrett catalog seems to use a larger turbine than the T66 with a comparable compressor.
Turbonetics T66 specs(assuming I am reading their catalog correctly)
compressor;
90mm wheel,2.58minor,3.584 major=52 trim
turbine;
78mm, 2.693 minor, 3.111 major=75 trim, 1.00ar
Garrett GT40 Ball bearing
82mm 50 trim compressor, 77mm 73 trim .94 ar turbine
or
88mm 54 trim compressor 77mm 84 trim 1.34ar turbine
QUESTIONS;
How will the first Garrett option spool compared to the T66, and how will the ultimate HP compare?
Should I try to get the larger Garrett compressor with the smaller Garrett turbine (almost the same as a T66 Qtrim) ie
T66-- 90mm 52 trim compressor, 78mm 75 trim 1.00ar turbine
GT40-88mm 54 trim compressor, 77mm 73 trim .94ar turbine
Does anyone know if the dispacement recomendations in the Garrett catalog are based more heavily on compressor or turbine sizing?
Garret lists the suggested displacement for a GT35 @ 2.5L-3.2L, and a GT40 @ 3.5L-5.0L, and since a GT35/40 uses a GT40 compressor I am guessing the displacement recommendation relates more to turbine size(yes?)
I'm still thinking the 35/40 is a bit small for 550rwhp, Comments? (am I completely lost?)
Thanks, Carl"
The search continues......
"The more research I do the more I think I'd like to put a T66 in my car. At the same time I'd like to take advantage of the relatively low cost, and great performance of the Garrett GTBB series Turbos. With this in mind I've been comparing the specs on various GT turbos to the Turbonetics Q trim T66. I am basing this on a 1.00 ar T66 since I know of a couple of guys who are using it on a T66 with good results. A GT40 comes the closest, although the compressor turbine pairing in the Garrett catalog seems to use a larger turbine than the T66 with a comparable compressor.
Turbonetics T66 specs(assuming I am reading their catalog correctly)
compressor;
90mm wheel,2.58minor,3.584 major=52 trim
turbine;
78mm, 2.693 minor, 3.111 major=75 trim, 1.00ar
Garrett GT40 Ball bearing
82mm 50 trim compressor, 77mm 73 trim .94 ar turbine
or
88mm 54 trim compressor 77mm 84 trim 1.34ar turbine
QUESTIONS;
How will the first Garrett option spool compared to the T66, and how will the ultimate HP compare?
Should I try to get the larger Garrett compressor with the smaller Garrett turbine (almost the same as a T66 Qtrim) ie
T66-- 90mm 52 trim compressor, 78mm 75 trim 1.00ar turbine
GT40-88mm 54 trim compressor, 77mm 73 trim .94ar turbine
Does anyone know if the dispacement recomendations in the Garrett catalog are based more heavily on compressor or turbine sizing?
Garret lists the suggested displacement for a GT35 @ 2.5L-3.2L, and a GT40 @ 3.5L-5.0L, and since a GT35/40 uses a GT40 compressor I am guessing the displacement recommendation relates more to turbine size(yes?)
I'm still thinking the 35/40 is a bit small for 550rwhp, Comments? (am I completely lost?)
Thanks, Carl"
The search continues......
12-11-02, 04:56 PM
#95
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At my mechanics a GT3540 is making 488rwhp@22PSi with a full restrictive exhaust. He has done a 10 sec flat quarter.
GT3540's would be the best for track work. U dont see that many track cars with HUUUGGGEE power as u cant put it down and u have to wait for lag and v8's etc will cane u out of a corner. With it spooling hard at only 3500rpm it would be perfect for track.
GT3540's would be the best for track work. U dont see that many track cars with HUUUGGGEE power as u cant put it down and u have to wait for lag and v8's etc will cane u out of a corner. With it spooling hard at only 3500rpm it would be perfect for track.
12-27-02, 12:38 AM
#96
Mad Man
Phatdex, any chance of seeing that dyno? Anyone gone to 25psi? Phatdex, should we use the +15% on the 488? Is that car running gasoline? What sort of mods? Any additional info greatly appreciated. Anyone running a GT40/42? Thanks in advance, Carl Byck
12-27-02, 05:38 PM
#97
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This was on a dyno dynamics dyno in Aus, so I guess u need to add 15% for a dyno jet figure. So for dyno jet i guess it would be around 540rwhp or something.
I dont have the sheet as i dont know the guy, just what my mechanic says he got. i am guessing it is running on C-16 because aus fuel is max 98RON so its pretty crap. So I would say 116RON C-16 was used but I dont really know. I am basing that on the fact my mechanic said i would need to use C-16 to run mine on 20PSI.
I dont have the sheet as i dont know the guy, just what my mechanic says he got. i am guessing it is running on C-16 because aus fuel is max 98RON so its pretty crap. So I would say 116RON C-16 was used but I dont really know. I am basing that on the fact my mechanic said i would need to use C-16 to run mine on 20PSI.
12-27-02, 05:41 PM
#98
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Ummm, the car is an RX2, it has a 13B extend port with GT35/40 (obviously) It has 4X1000cc injectors. It is dowelled. Thats about it. 2mm seals. And a microtech computer. With bar and plate intercooler.
12-28-02, 04:58 PM
#100
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um extend port is a turbo port or I THINK what u guys call street port. Just slightly bigger EXTENDED ports. So no need to bridge etc etc. Basically what most ppl do to their turbos unless they go crazy and bridge it.