Hondata

Setup:

B18C1- 81mm ~9.5:1cr
USDM P72 ECU
Hondata S300
Hondata Boost Control Solenoid
Hondata 4-bar MAP
RC 750cc Saturated
Walbro 255

Inline Pro Mani
T3/60-1 .63a/r
3" Turboback
Tial 38mm WG- 13psi Spring
New Autometer Digital Electronic Boost Gauge


Issue:
Boost gauges read 13psi at full boost

Hondata reads no more than 8psi

Hondata boost cut set at 10.5psi- Never hits boost cut at any point during pulls


Already Tried:
No boost controller- the Hondata controller was disconnected- no effect
Different Hondata 4-bar- Had another one around the shop, put it on- no effect
Different Boost Gauge- plugged in a mechanical Defi gauge- no effect

Thoughts? Car runs mint, seemingly no vacuum leaks, no stutters, car makes 8psi power levels...am I over looking a vacuum leak? Then why isn't the car stuttering?

A stock map sensor cannot read 24psi. IF your boost cut is set at 10.5 psi and you have a stock map sensor it may not activate the boost cut since the map sensor may not be able to read that high. It may only be able to read to 10.3 or so. Without datalogs and calibrations showing the problem is is hard to tell exactly what the problem might be.

I will attempt to download the tune from the S300 to my laptop and post it later tonight.

Thanks for your input