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Intake manifold pressure changed with 4 throttle setup

Posted: Thu Nov 15, 2018 9:47 pm
by K20remix
hi all,

recently undergoing a project of my friends car with a 4 throttle intake system setup.

However, we found that the MAP reading changed to higher pressure from stock setting when plug in Hondata FP with last tuned running map as this setup base map for tuning. The idling MAP pressure changed from stock -24.9" to -14.9" after changed to the 4 throttle short runner setup.

Whenever I try to alter the MAP table to index start from -16", the car become jerking seriously and engine stalled.

This is the very 1st time we explore to this kind of setup on VTEC cam engine project..

May I know, is this cause by the short runner 4 throttle setup which is normal?

Would lile to seek for your all guidance..

Million thanks...

Re: Intake manifold pressure changed with 4 throttle setup

Posted: Fri Nov 16, 2018 10:39 am
by Spunkster
Are you using Alpha-N tuning for this?

Re: Intake manifold pressure changed with 4 throttle setup

Posted: Fri Nov 16, 2018 6:55 pm
by K20remix
No, didn't thought of using alpha n
was trying to use MAP