Why Less boost in 2nd, 3rd.. gears ?? Help
 

Ok, Heres my problem. Im pushing 8 lbs on stock internal wastegate on dsm t25. (1g dsm BOV) My ride is 92 Honda Civic d16z6.

The Problem:
If I go from a stop, my first gear builds 8lbs (like it should), but after I shift, sometimes 2nd only builds 6lbs, same with 3rd. But.. If I start in second or third (from a roll) it builds 8lbs fine. Am I shifting too fast, and not letting all the pressure out? or is it cause my rpm's are already higher, and its pushing the wastegate open early? Im confused :S

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

internal wastegates are garbage.

try a new actuator.

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

im using a HF mani, so a external will prob out of the question. And I dont kno if another actuator would push the 8lb boost I want.

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

im gonna guess the actuator is on its way out, try to find another one with a similar opening psi

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

bullshit, external with hf mani is totally doable.

told ya.

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

Ditch the wastegate actuator and run a spring! It's a simple yet effective solution.

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

disconext the vac line to the waste gate and see if its any better.
also check for any boost leaks

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

thats right!

Attachment 32919

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

yea right the spring solution cant hold boost steady at all, it varys boost from gear to gear.

I'd try shimming the actuator or putting a helper spring on the arm. But it alot of cases this can be a result from a cracked exhaust housing. The best way to fix this would be a external gate.

Re: Why Less boost in 2nd, 3rd.. gears ?? Help
 

thanks guys, Ill try some suggestions.