Possible Boost Issue's?

[LandryPoole]

Ok, when I was a 2bar, and stock MEMCAL, my stock boost guage would pegg up at the top, and do it rather quickly. Now, with the 3bar and ultimate, it only goes up half way, while the boost guage goes to 16psi, however, it just seems like it is taking longer for the boost to build up than it should. On the highway for instance, if I stand on it, it take about 3 to 4 seconds before the boost hits 16psi. Is this normal, or do I have a problem? I checked all vaccuum lines by isolating them with a crimping tool, and still no change. The stock boost guage does not read like it did. Also, I did blow a vaccuum line off, and when I did, I smelled the convertor like rotten eggs. I'm thinking that is just the extra fuel that hit it, without boost that made that smell, but was wondering if maby it is stopped up now. I am reading 20 on the vacuum when idling, and I'd think that is pretty good. Please help. I'm at witts end. :rant:

 

[jwaller]

Re: Possible Boost Issue's?

the stock boost gauge should only be used for wasting idle time, it doesnt work right to begin with and it's even further off with a 3 bar chip.

always use a real (mechanical) boost gauge for taking measurments.

 

[Flyin Ryan]

Re: Possible Boost Issue's?

With a 3bar map sensor your stock boost gauge's needle will not peg so don't be concerned with that... and like John said the factory gauge is useless to begin with invest in an autometer or something

 

[LandryPoole]

Re: Possible Boost Issue's?

I have the autometer, but was curious about the factory guage not working as it use to. So am I then to understand that the factory guage will not pegg with a 3 bar chip then? If so, I'm happy again. Further, is it my truck, or does the factory turbo just not spool up that fast? if I'm in second gear, it will spool, but sometimes shift before reaching 15psi, and then when it gets to 16psi, it bounces between 14psi and 16psi. Is this normal with the factory boost controller?

 

[QUICK STORM]

Re: Possible Boost Issue's?

that would be a result of the ultra crappy internal wastegate which has terrible boost control

 

[Black Knight]

Re: Possible Boost Issue's?

always use a real (mechanical) boost gauge for taking measurments.

Now by (mechanical) you mean like T-ing into the brake booster line right??
Man reading that back I feel like an idiot, but I really can't answer that, when you say mechanical I don't think vacuum, I think like oil pressure. OK go ahead laught AT me :rotf: !!!

 

[QUICK STORM]

Re: Possible Boost Issue's?

Now by (mechanical) you mean like T-ing into the brake booster line right??
Man reading that back I feel like an idiot, but I really can't answer that, when you say mechanical I don't think vacuum, I think like oil pressure. OK go ahead laught AT me :rotf: !!!

mechanical meaning yes "T"ing into the brake booster line. my blitz boost controller has a digital display of boost as well, that would be the electrical part.

 

[Flyin Ryan]

Re: Possible Boost Issue's?

I have the autometer, but was curious about the factory guage not working as it use to. So am I then to understand that the factory guage will not pegg with a 3 bar chip then? If so, I'm happy again. Further, is it my truck, or does the factory turbo just not spool up that fast? if I'm in second gear, it will spool, but sometimes shift before reaching 15psi, and then when it gets to 16psi, it bounces between 14psi and 16psi. Is this normal with the factory boost controller?

Yes that's correct the factory gauge now is completely useless with the 3bar where as before with the 2bar it was something cool to look at but not go off of.. .

Stock trucks with stock turbo setup should spool pretty quick.. and the difference in boost each time would be the result of a crappy or possibly sticking factory wastegate.. do a search on here for boost control or wastegate adjustment and you'll see tons of info about this.

 

[LandryPoole]

Re: Possible Boost Issue's?

Cool, would a catalytic convertor cause the spool time to be slow? It is the only verible that I have not checked, althought from static to 20in. of vacuum, is lightning quick, which usually means the cat. is good to go.???