Jeff_Jeske

iTrader: (66)

I'm tuning a friends EVO8 old school BB FP Black but w/o surge ports / 2.0L / S2 / 110 leaded ....

When starting a pull from 2k rpms in any gear the car starts to accelerate then it feels like it pauses for a second before to boost kicks in and it takes off like a raped ape.

This happens in every gear, it feels almost like a full second of a stead state transition before rapidly building boost. The only config change from the last tuning session was a shift from HKS 272 to GSC S2 cams.

I tried trimming timing adding timing as well as fuel adjustments but there was no change in spool up behavior.

Any ideas on what would cause a dead spot in transition?

roni4g63

iTrader: (1)

If you have messed with timing and fueling and have not noticed a difference, its most liekly mechanical, id check the wastegate and make sure its not loose or anything funky like that, and maybe a boost leak test

kaj

iTrader: (60)

Mine used to do that, but it was the comp wheel hitting the housing. Turbo was toast. Hopefully your friend doesn't have that problem.

Good luck, brotha!

Aby@MIL.SPEC

iTrader: (161)

why no surge ports?

what boost level are you targeting?

would be good to see the boost vs rpm trace