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Old 09-09-2009, 10:27 PM
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Post 09 Fit Engine / Tranny Durability?
So I am seeing alot of interest in boosting L15A engines but can the cylinder sleeves and pistons handle the extra pressure? It seems that step one towards boost should be getting your engine sleeved and rebuilt to accomodate high boost?


Regarding the transmission, I am interested in an automatic for the paddle shifters (I do not own a fit yet), but I am wondering how much HP and Torque can be safely put through a low end paddle shifted transmission like that. Don't get me wrong I would love to have a fit but it is essentially an econobox, and I must wonder how much power the tranny can handle.


I am not planning on a massively built car but is 140-160 hp safe through a stock auto tranny? Is is possible to upgrade the auto tranny and retain paddle shifting?
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Old 09-13-2009, 10:14 PM
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No one has anything to say about the fit engine or tranny?
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Old 09-15-2009, 12:53 PM
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buttered corn is an unknown quantity at this point
from what i've heard. sleeves are good up to 10psi. rods and pistons are good up to 19psi.

but i'd keep it at 10psi max for dd.
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Old 09-21-2009, 03:00 AM
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Bump out of concern for the tranny.


Would increased HP and Torque be ok with the stock L15A tranny? (Auto - using paddle shifters)



Thanks in advance if an engine guru can advise me.
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Old 09-21-2009, 02:50 PM
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buttered corn is an unknown quantity at this point
depends how much you are adding. I know for sure if you want to turbo @6psi ~165whp, you'll prolly want a new clutch, stock one will slip.

I haven't heard too many complaints about the tranny.
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