Semi-Bridge in a Auto FD
09-13-05, 12:05 PM
#3
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I think it's a pretty damn dumb idea, given that the auto can only support a 7k rpm redline and, with a port job like that, your peak power will be above that. Hell, even a streetported motor is wasted on an auto...
09-13-05, 12:12 PM
#5
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Originally Posted by rynberg
I think it's a pretty damn dumb idea, given that the auto can only support a 7k rpm redline and, with a port job like that, your peak power will be above that. Hell, even a streetported motor is wasted on an auto...
09-13-05, 12:52 PM
#6
TRINGLS
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The tranny cannot handle more than 320rwhp. I killed mine in 5,000mi with the M2 and all the bolt-ons. Not to mention as stated the internals of the transmission cannot take high RPM's... although I frequently took mine to 7500-7700rpm. 
~Kris
~Kris
09-13-05, 02:11 PM
#7
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I think the tranny can handle around 320 to 350 HP max if its serviced and in top shape with synthetic oil. before installing the motor have the trans inspected and serviced. the real problem is going to be the stock ECU. you can't run a PFC with the auto tranny so your going to have to keep the boost at a max of 10 psi with the stock ECU. next problem is smog testing I don't think you will pass with the stock ECU. check out my sig I am running 10 psi with all the bolt-ons and my trans is holding up fine for now, but a level 10 upgrade may be in the future.
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09-13-05, 02:22 PM
#8
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You can run a PowerFC on the automatic, you will loose the 'hold' functionality however, just the same as you would using a reprogrammed manual ECU (Pettit, M2, RE-A, etc).
How long will the tranny last again is the question, I would say not very long... I already had 80% of my 5spd swap parts in hand by the time my tranny failed so I wasnt going to waste time with more automatic nightmares.
~Kris
How long will the tranny last again is the question, I would say not very long... I already had 80% of my 5spd swap parts in hand by the time my tranny failed so I wasnt going to waste time with more automatic nightmares.
~Kris
09-13-05, 05:29 PM
#9
Well, Let me just add my 2 cents here!
I`m presently a Auto FD owner and made 402 / 17 psi. at the wheels with consertive bolt on`s. However, a secondary bridge is not wise as the motor will have to run at high RPM`s for max peak performance. Furthermore, your idle vacuum will be sacrificed depending on the size streetport applied. But! single turboing an Auto FD is very wise as you don`t lose any boost pressure during transision during gears.
Keep everything balance (turbo A/R size, intercooler, fuel injector size, intake and exhaust port sizes) and you`ll be fine.
Good luck,
Andre
I`m presently a Auto FD owner and made 402 / 17 psi. at the wheels with consertive bolt on`s. However, a secondary bridge is not wise as the motor will have to run at high RPM`s for max peak performance. Furthermore, your idle vacuum will be sacrificed depending on the size streetport applied. But! single turboing an Auto FD is very wise as you don`t lose any boost pressure during transision during gears.
Keep everything balance (turbo A/R size, intercooler, fuel injector size, intake and exhaust port sizes) and you`ll be fine.
Good luck,
Andre
09-13-05, 06:40 PM
#10
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Originally Posted by andre sinclair
Well, Let me just add my 2 cents here!
I`m presently a Auto FD owner and made 402 / 17 psi. at the wheels with consertive bolt on`s. However, a secondary bridge is not wise as the motor will have to run at high RPM`s for max peak performance. Furthermore, your idle vacuum will be sacrificed depending on the size streetport applied. But! single turboing an Auto FD is very wise as you don`t lose any boost pressure during transision during gears.
Keep everything balance (turbo A/R size, intercooler, fuel injector size, intake and exhaust port sizes) and you`ll be fine.
Good luck,
Andre
I`m presently a Auto FD owner and made 402 / 17 psi. at the wheels with consertive bolt on`s. However, a secondary bridge is not wise as the motor will have to run at high RPM`s for max peak performance. Furthermore, your idle vacuum will be sacrificed depending on the size streetport applied. But! single turboing an Auto FD is very wise as you don`t lose any boost pressure during transision during gears.
Keep everything balance (turbo A/R size, intercooler, fuel injector size, intake and exhaust port sizes) and you`ll be fine.
Good luck,
Andre
09-13-05, 06:56 PM
#11
Rotary Enthusiast
Hey Andre. what did you do to the trans to handle that kind of power? and what ECU did you run to handle 17 PSI ?. I was thinking of getting a PFS PMC to get a little more out of my mods. most auto guys seem happy with them.
Jeff
Jeff
09-13-05, 09:51 PM
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Idle on a secondary bridge
Not too sure honestly about the idle with an auto...however, I do know with a 5 speed, and an electromotive tec II, you can get a lovely "lump...lump...lump" idle at about 900r's.
09-13-05, 11:43 PM
#13
Jeff,
I `m still running the twins. However I've decided to now go single in search of more power. I must say that I `m rather impressed with force induction on an Auto. Things that I have done was to upgrade the valve body and tranny oil cooler but mostly I change my tranny fluid (Dextron V.) every 10,000 miles.
My mod `s are PMC FPS intercooler and Purple computer with latest software (Pink 9.)
twin supra pumps and fuel pressure regulator (static pressure 42 psi)
Remember if you port the intake and exhaust open the exhaust port timing so that the discharge is sooner and slightly port as it closes. Too big of a port will cause overlap of the exhaust gases and bigger turbo lag...that`s why I say to keep it conservative.
Andre
I `m still running the twins. However I've decided to now go single in search of more power. I must say that I `m rather impressed with force induction on an Auto. Things that I have done was to upgrade the valve body and tranny oil cooler but mostly I change my tranny fluid (Dextron V.) every 10,000 miles.
My mod `s are PMC FPS intercooler and Purple computer with latest software (Pink 9.)
twin supra pumps and fuel pressure regulator (static pressure 42 psi)
Remember if you port the intake and exhaust open the exhaust port timing so that the discharge is sooner and slightly port as it closes. Too big of a port will cause overlap of the exhaust gases and bigger turbo lag...that`s why I say to keep it conservative.
Andre
09-15-05, 11:24 PM
#14
Rotary Enthusiast
Hey Andrew. let me know if you want to sell the PFS PMC Computer when you go single. I've been told these are working good for the auto guys. what tranny valve body did you use as an upgrade? If you have'nt installed the 4.3 gears in the rear yet do this as your next mod it makes a big improvement. send me a PM when you can
Jeff
Jeff
09-16-05, 12:00 AM
#15
Jeff,
I`m already ahead of the ball. Fritz Flinn was kind enough to sell me his 4.33 gears and yes it makes quit a difference downstairs. I`m looking to go single by the end of the year for i have everything just waiting for the L?Tx10s and time to do the install, so keep in touch with me and I`ll definitely sell it to you then. A friend informed me that there`s a way to retain the hold function on the tranny. Nevertheless, I`ll keep you posted.
I`ll get the info about the valve body and let you know
Andre
I`m already ahead of the ball. Fritz Flinn was kind enough to sell me his 4.33 gears and yes it makes quit a difference downstairs. I`m looking to go single by the end of the year for i have everything just waiting for the L?Tx10s and time to do the install, so keep in touch with me and I`ll definitely sell it to you then. A friend informed me that there`s a way to retain the hold function on the tranny. Nevertheless, I`ll keep you posted.
I`ll get the info about the valve body and let you know
Andre
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