Ok i was wondering what would cause no boost in first gear the turbo spools i hear it the blow off valve goes off but on the boost gauge it shows 10inch's in vac. I've had two different turbo's do the same thing i had tdo5h(14b) and the turbo now is td05-3. My setup is tdo5-3, custom manifold, b18b1, 450cc blacktop injectors, custom boost chip(josheph davis), front mount npr intercooler custom endtanks, custom intercooler piping, dsm blow off valve crushed. In second, third, fourth, fifth, i see boost my waste gate is at 6 psi on the td05-3, on the 14b 8 psi. my vaccum is 20 inch vac on idle.

 

uhm if you hear your bov PSH u have boost.

 

where what do u have the guage vac line hooked to

 

so maybe it's my boost gauge i think it's tee'd to many times and the vac line is garbage maybe swith lines and see what happens right?

 

Hold up. You get boost in other gears and not first? If you got a BOV goin on then your definatly boosting. Check your vac lines otherwise.

 

ya i think my bov is off by a few psi b/c i can hear the bov at even 0 vac when i shift.

 

at 0 vac you still have air moving through your charge pipe and if you shift your bov will open and have air rush past it and psssssh.

 

you also may be hearing your wastegate..

 

make sure u used tephlon tape on ur connections

 

If you have vaccum at wot in first then something is wrong.. either the gauge is reading wrong or you have a restiction some where.