T-88 or T-78?
04-10-08, 05:17 PM
#1
Rotor or no motor
Thread Starter
iTrader: (24)
T-88 or T-78?
Hey guys
I m about to order my turbo kit but im stuck between t-78 and t-88
does anyone have a dyno graph ?
i ve been reading different capabilities from site to site. Any owners can give me any experience feedback?
Thank you
Con
I m about to order my turbo kit but im stuck between t-78 and t-88
does anyone have a dyno graph ?
i ve been reading different capabilities from site to site. Any owners can give me any experience feedback?
Thank you
Con
04-10-08, 09:21 PM
#4
04-10-08, 09:53 PM
#5
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04-11-08, 03:20 PM
#11
“No school like the old school”
Speaking from experience I like my T78, 450rwhp with less than 20 PSI isn’t shabby.
I was also looking at GT35r kits but to be honest I was not impressed when I saw some in person. All the hype on the forum was also a bust being most of the HP numbers are good but not the “second coming “people expected. The Greddy is a very complete kit and not just a collection of various parts from different manufactures. I also went with a Greddy FMIC and you can decide if you like how well this kit went together.
[img=http://img80.imageshack.us/img80/3521/33001ow8.th.jpg]
The GT40r or RD85 are a better comparison to the T78. The GT35r is a nice turbo but I question the comment about price of rebuilds. A T78 will set you back $500 or so, I can’t imagine a new cartridge for a Garrett turbo would be cheaper? Do some searches on GT40r and RD85 both at great turbos.
Zinx is right about the T88, that’s a huge turbo and the majority of guys that run them drag race. T78 also tend to be strong on the strip, but guys like Fritz Flynn have been road racing T78’s for years with great results.
However I do agree about how the new turbo’s out perform the older non ball bearing ones, but I wouldn’t dismiss the old ones as an option. If they were so outdated they wouldn’t be selling them anymore.
You’re supporting mods, like fuel injectors, fuel pump, engine porting, ECU and the IC you have will have a big effect on how the turbo can perform. Tell us what else you have and what your HP goal is and what type of driving you will be doing. And dont forget 3/4 of the people that give advice here dont even have a single turbo Rx7
Speaking from experience I like my T78, 450rwhp with less than 20 PSI isn’t shabby.
I was also looking at GT35r kits but to be honest I was not impressed when I saw some in person. All the hype on the forum was also a bust being most of the HP numbers are good but not the “second coming “people expected. The Greddy is a very complete kit and not just a collection of various parts from different manufactures. I also went with a Greddy FMIC and you can decide if you like how well this kit went together.
[img=http://img80.imageshack.us/img80/3521/33001ow8.th.jpg]
The GT40r or RD85 are a better comparison to the T78. The GT35r is a nice turbo but I question the comment about price of rebuilds. A T78 will set you back $500 or so, I can’t imagine a new cartridge for a Garrett turbo would be cheaper? Do some searches on GT40r and RD85 both at great turbos.
Zinx is right about the T88, that’s a huge turbo and the majority of guys that run them drag race. T78 also tend to be strong on the strip, but guys like Fritz Flynn have been road racing T78’s for years with great results.
However I do agree about how the new turbo’s out perform the older non ball bearing ones, but I wouldn’t dismiss the old ones as an option. If they were so outdated they wouldn’t be selling them anymore.
You’re supporting mods, like fuel injectors, fuel pump, engine porting, ECU and the IC you have will have a big effect on how the turbo can perform. Tell us what else you have and what your HP goal is and what type of driving you will be doing. And dont forget 3/4 of the people that give advice here dont even have a single turbo Rx7
Last edited by Nuvolari; 04-11-08 at 03:40 PM.
04-11-08, 10:14 PM
#12
Rotor or no motor
Thread Starter
iTrader: (24)
im trying to reach solid 550whp
i have full ported engine with ceramic ianetti seals ceramic coated manifolds
1600cc secondary /850 primary
3row SMIC ( thinking of getting a v mount
greddy rad
greddy oil coolers
Re-amemiya throttle body and AST
Aeromotive fuel pressure regulator and 280lh supra TT fuel pump
T-78 is a non ball bearing turbo?
its a pump gas but its 98 and 100 octane.. almost like the racing gas
i have full ported engine with ceramic ianetti seals ceramic coated manifolds
1600cc secondary /850 primary
3row SMIC ( thinking of getting a v mount
greddy rad
greddy oil coolers
Re-amemiya throttle body and AST
Aeromotive fuel pressure regulator and 280lh supra TT fuel pump
T-78 is a non ball bearing turbo?
its a pump gas but its 98 and 100 octane.. almost like the racing gas
04-11-08, 11:42 PM
#14
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Garrett GT design where being used by John Deer and Detroit Deisel, Diesel engine heavey equipment manufacturers for years before it was introduced to pertol in ball bearing. Those wheel desings have been around almost the same time as mitsubishi TD series.
04-12-08, 06:50 AM
#15
T78 are non ball bearing . I am shooting for 550hp at 25psi, and I think I am there once I turn up the boost. But untill I get my LSD, and race axels its not a good idea.
I think your better off with the T78 , R85 or GT40R to reach those numbers. Go "V" mount !!!!! I like my FMIC but if I did it again I would get a V mount. Your porting will help also. I recall a guy in MD "FDVirgin" ? that recently had PFS built him a half bridge , w/T78 and hes at 550hp+ at 20psi (I think )
Do you have two fuel pumps or just one ? Oh and all my numbers are on 93 pump.
Have you thought about removing your AC and PS ? I dont miss either at all, and its a hell of alot easier to work on my car now.
I think your better off with the T78 , R85 or GT40R to reach those numbers. Go "V" mount !!!!! I like my FMIC but if I did it again I would get a V mount. Your porting will help also. I recall a guy in MD "FDVirgin" ? that recently had PFS built him a half bridge , w/T78 and hes at 550hp+ at 20psi (I think )
Do you have two fuel pumps or just one ? Oh and all my numbers are on 93 pump.
Have you thought about removing your AC and PS ? I dont miss either at all, and its a hell of alot easier to work on my car now.
04-12-08, 10:23 AM
#19
Rotor or no motor
Thread Starter
iTrader: (24)
T78 are non ball bearing . I am shooting for 550hp at 25psi, and I think I am there once I turn up the boost. But untill I get my LSD, and race axels its not a good idea.
I think your better off with the T78 , R85 or GT40R to reach those numbers. Go "V" mount !!!!! I like my FMIC but if I did it again I would get a V mount. Your porting will help also. I recall a guy in MD "FDVirgin" ? that recently had PFS built him a half bridge , w/T78 and hes at 550hp+ at 20psi (I think )
Do you have two fuel pumps or just one ? Oh and all my numbers are on 93 pump.
Have you thought about removing your AC and PS ? I dont miss either at all, and its a hell of alot easier to work on my car now.
I think your better off with the T78 , R85 or GT40R to reach those numbers. Go "V" mount !!!!! I like my FMIC but if I did it again I would get a V mount. Your porting will help also. I recall a guy in MD "FDVirgin" ? that recently had PFS built him a half bridge , w/T78 and hes at 550hp+ at 20psi (I think )
Do you have two fuel pumps or just one ? Oh and all my numbers are on 93 pump.
Have you thought about removing your AC and PS ? I dont miss either at all, and its a hell of alot easier to work on my car now.
my SMIC greddy 3 row gives quick response, a lot quicker than the FMIC ...i would never put the FMIC on my car with all that piping. i thinking of a Vmount as i have said
I only have one fuel pump the 280lph denso supra TT model
04-12-08, 12:07 PM
#20
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I had the T88 34D and loved it. Went 10.8's on 20psi and made decent power. Dan Schecter is still running the older greddy turbos and running in the 9s consistently.
The greddy turbos tend to smoke, I've seen a lot of them having to be rebuilt for smoking. Right now 2 of my friends who have Greddy turbos have to get them rebuilt. I sold one that I thought was not smoking, guess what, it was.
I really liked the T88 34D over the T78 but nowadays I would just get a newer turbo.
Anthony
The greddy turbos tend to smoke, I've seen a lot of them having to be rebuilt for smoking. Right now 2 of my friends who have Greddy turbos have to get them rebuilt. I sold one that I thought was not smoking, guess what, it was.
I really liked the T88 34D over the T78 but nowadays I would just get a newer turbo.
Anthony