Vtec plus turbo

D15, D16, D17 and Mini-Me swaps
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Vtec plus turbo

By twc2010
- Mon Sep 13, 2010 2:35 pm #213408 I have a jdm d15b vtec. I was wondering that when i got my turbo would it be okay to add a push button switch for the vtec on my shifter. Just getting suggestions. I just thought that this would be something fun to do.

By AutoXCivic
- Tue Sep 14, 2010 3:51 am #213542
teal_dx wrote:I would leave it alone and let the ecu activate/de-activate vtec. The ecu knows best :thumb:


This.

The ECU is smarter than you and can react to input that you don't know is there.

Get the ECU chipped, get it tuned, and leave it alone.

By Butterzz
- Wed Sep 15, 2010 7:51 pm #213851 Not to mention D series VTEC isn't much to get excited about anyway. Especially if you're boosting.
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By Eg6H2D
- Fri Sep 17, 2010 10:50 pm #214215
Butterzz wrote:Not to mention D series VTEC isn't much to get excited about anyway. Especially if you're boosting.


SMH. it definately helps. YouTube some d16 turbo on the dyno. you'll hear it..
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By 95CivEg
- Sat Sep 18, 2010 6:55 am #214301 yupp(above)

By Butterzz
- Sun Sep 19, 2010 6:45 pm #214477 I own a VTEC boosted D series. It takes my car about 3 seconds to get from 5500 to 8000 rpm if I'm in boost. It definately engages, but it isn't there long enough to make any difference.
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By TrailerTrash
- Mon Sep 20, 2010 3:31 am #214534
Butterzz wrote:I own a VTEC boosted D series. It takes my car about 3 seconds to get from 5500 to 8000 rpm if I'm in boost. It definately engages, but it isn't there long enough to make any difference.


you need a VX tranny :P

By AutoXCivic
- Mon Sep 20, 2010 4:47 pm #214610
Butterzz wrote:I own a VTEC boosted D series. It takes my car about 3 seconds to get from 5500 to 8000 rpm if I'm in boost. It definately engages, but it isn't there long enough to make any difference.


It depends on what the optimum engagement point for VTEC is. If your tuner has any clue what he is doing he'll do three tunes.

1) Full RPM range no VTEC
2) Full RPM range VTEC on

After step 2 then some consideration is in order. The optimum point for VTEC will be when the small lobes stop making power and the big lobes start. The best crossover point will vary between setups. Mine is set to engage at 4800 and there is no VTEC "dip" or "jump" the power is one smooth line from go to redline (which is how VTEC is supposed to function).

3) Final tune done with VTEC engaging to gauge the best point for it to do so.


Or something like that.

By twc2010
- Tue Sep 21, 2010 1:02 am #214684 i also have a vtec air/fuel controller
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