jus tuned my b16a today @ 10psi, Tial 38mm WG. Has a large line going to the intake manifold and it is NOT been tapped into. No boost controller. It is spiking to 14+psi at times.

i hear the compressor housing is the best and also not the best for vacuum. but more say DO it, but i want more critism before i do this. thanks


wade

 

Use the compressor housing you weenie

 

ok didnt help. monday we are putting a diff WG on and seeing if thats the deal. We have had a few tials fail, so i hope this is the issue also!

 

What manifold? Wastegate dump routed back to your downpipe? You did your tuning at 10psi, so does that mean this problem just came up?

 

WG is dumped below pan. nice big dumptube, no restriction. yes the guys at the shop i work at tuned my car. that isnt an issue. i have a Neukin V V manifold

 

So you don't have boost creep on the dyno, but you do on the street? Strange. Double check your pressure source and fittings on the wastegate, make sure nothing is loose I guess. If not that, take the wastegate off and test it.

 

may just need to richen it up a bit as it goes into boost, could be extra heat caring over and causing it to spike, orr could be overly rich and fuel burning in the manifold causing extra heat and the spike. or... it could be that you are wadel and your car hates you.

 

tial 44mm goes on to test once i return from my trip

 

Probably just boost creep due to manifold design, it's not uncommon at all...

 

yea i figured. I am going to get a 38mm to 44mm tial flange adapter while i am out in TX or AZ and put it on once i get home and borrow a friends 44mm gate and see how that goes b4 i spend 300+ on a gate that MIGHT not fix my problem. i cant wait to find out... i just wonder with the 38mm flange being on the manifold still if it will be a restriction for the 44mm gate thats AFTER it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Probably just boost creep due to manifold design, it's not uncommon at all...</TD></TR></TABLE>

the gate is venting off all four in the collector, its a decent size ID pipe leading to the gate's flange. Granted it is perpendicular to flow, but still the exh manifold is at least 1.5X the pressure the int manifold is so I would think as soon as the gate opens youre going to gate off pressure quickly. We're not even talking about running low boost on a huge turbo when creep is most common. This is only a T04E-60trim.

Fuel is a rock solid line 11.5:1 from 5-8k rpms

 

i just say, its wade and therefore he's freaking out and his wadel factor of 1.2 affect boost creep.

 

well got the 44mm flange and stuff, gate will be on this tuesday or wednesday.... if no luck..... be checkin on ebay for some stuff!

 

thank you Mr.Tial 44MM my new friend!