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Originally Posted by Andrew McD
Oh interesting, i've a 986 tip and one thing i've not been all that impressed with is its throttle response. Has it made any difference to the gear changes? Also would you need to change the exhaust as well, or will the gains be seen with the standard backbox?
:-)
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Yes, my car feels like there is alot of "engine resistance", the throttle response is not impressive at all.
The bmc, new aos and ipd plenum has improved the throttle response. I list all 3 mods since I did all the mods at one time and can't tell which one is contributing to what ?
I'm on stock headers, cats and muffler so it does work on standard exhaust system. I'm pretty sure with a decent sports exhaust system, there should be more gains - I've only addressed the intake end of things..
Gear changes, hmmm, my tip seems to be quite quick to change from 5th to 4th to 3rd, but slow going down to 2nd (eg up a hill). Subjectively, the change seems to be faster - probably due to the bigger throttle body (74mm vs 68mm), need to press less hard on the accelerator to get the gears to change.
The bad news - I think the ipd plenum is only available on the 2.7l and 3.2l boxsters.
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