Turbo + automatic

[Pandemic]

So, I hear that turbos like automatics better... less lag when shifting.

but, a). would you do it to your automatic?
b). how much HP/tq can the tranny take stock?
c). what PSI is safe on stock internals? ( i hear 7psi and under)
d). what specs could be seen with a 5-7psi setup?

[deevergote]

6-7psi could work on stock internals. The turbo you use makes a big difference. Small turbos make heat, heat kills engines.

The Honda automatics aren't very strong when it comes to putting considerable power through them. People have done it, and some have lasted, but I would prepare to replace the transmission just in case. If you boost an automatic, EXPECT to replace it... if you don't have to, bonus! The best way to keep it alive, other than not beating on it all the time, is to run a good fluid (at least Honda ATF, Redline synthetic is usually the ATF of choice for most FI automatic people) and use a transmission cooler.


5-7psi with a decent tune and a properly sized turbo would probably get you around 175-180whp, provided you had other mods to make it work (like a proper sized exhaust... 3" or so is best) Moderate boost on an F22 yeilds H22 power, maybe a little more, and a good deal more torque (which is what the transmission usually doesn't like).

[ExplodingCake]

Level 10 Torque converter.

[Accord R33]

FTS + 5 speed > auto

[Pandemic]

what is FTS + 5spd?

Does an auto tranny reduce turbo lag?

[Accord R33]

FTS = Full Throttle Shift.

Pretty easy to setup in Uberdata/Crome

[deevergote]

An auto tranny does not reduce turbo lag, but it does keep the engine under load during shifts. Normally, a 5 speed transmission requires you to let up off the gas to shift safely, which will let the turbo slow down and need to be re-spooled... in that case, lag may be present. With FTS, you can keep your foot on the gas and keep the turbo spinning when you shift.

[NAiL05]

Auto trannies are nice if you can get them to withstand the abuse. 91accordexr33 had a boosted setup on his car. I think he was running 15z though as I recall. I would think it would be some sort of trans issue since IMO should have been faster. But if you can get an auto trans strong enough to run boost it will be a good competitor.