I have a hx35/hx55 twin set up and on the hx35 I have a 12cm exhaust housing and was wondering if I put my stock exhaust housing on would it help out with spooling and boost?

 

What exactly are your spooling and boost problems? Any larger on the secondary turbine housing will hurt spool. The 12 is hurting top end however, as it's a major bottleneck.

 

Isn't the purpose of the primary/larger turbo was to cover the deficiencies in the smaller turbo at higher rpm's? Granted, the smaller one is still feeding the larger one, so is that why the restriction? I seem to recall Stomp running an HX35/HT3B setup, so it can't be that bad!

 

It spools good I know that I need more fuel but the boost is what I dont get it will only make around 38psi under full load. I would of thought that the twuns would do better than that. Th e hx35 as a single was making around 42 or so.

 

Photo of your set up please... Is there a gate on the HX-35.. how is it running now?
What is your big turbo making for PSI @ 38# boost?

 

Hmmm...something is wrong, you should be seeing 60+

 

fuel makes boost, are they clearing up the fuel?

 

Thats what I was thinking and was hopeing you guys would help me out and tell me what i could do to fix it.

 

yes it does the hotest it ever gets is around 1150 and its a pre turbo egt in the back three side of the manifold.

 

bigger injectors!

 

Or a boost leak. When you get on it do you hear a high-pitched squeaking kind of sound? If so, you have a leaker. I'd go and recheck all your boots a 3rd and 4th time, just to be sure.

 

No more boost leaks I had one and fixed it. So if I got some 6/14 or 6/16 and put that stock exhaust on should I be around the 50-60 psi range?