Installation and Q&A for S&H Stealth Twin kit 05-10

[TexasBlownV8]

Locate the intercooler pipe with the 2" v-band flange mount. The S&H bov comes with an 11psi spring installed for stock vac 20-22. Kit also includes a 9psi spring for less vacuum setups 16-19 vac.

How can you tell the difference in the 2 springs? One is definitely stiffer and thicker than the other.

 

[JeremyH]

The less stiff spring is the lower value.

 

[TexasBlownV8]

The less stiff spring is the lower value.

The weaker spring is for the lower vacuum, that is the one that was already in the bov. With the car apart, it is impossible to test which one to use now. But with my cams, especially at idle, vacuum is well under 20, and closer to 14-16.

 

[JeremyH]

Every setup will vary on what spring works best, after its running at warm idle perform the test to see if it operating correctly for your setup and go from there. For now I would leave the softer spring in.

 

[TexasBlownV8]

OK, will have to try it and see then!
The softer one is in there for now.

 

[JeremyH]

Yeah I see around 16vac at idle and valve didn't open with the 11psi spring so I put in the 9psi and it fully opens.

 

[TexasBlownV8]

Just a parts list note:
the 2 couplers that go on the turbo discharge ports are 2" in diameter. There were no clamps that properly fit that size; the 2-1/4" clamps are ok for the other side, but the turbo side really needed 2" clamps instead, or at least the 2-1/4" clamps provided would not clamp down far enough for proper fitment. I obtained a pair of 2" clamps and they did fit properly around the turbo discharge hose; just being a little picky about what clamps are used where so as to make proper and solid slip-free sealing.

 

[JeremyH]

We found the opposite, that the 2" clamps were a tad to small and hard to get started and that the 2 1/4" work better. That's what we all use and include in the kit. As long as it works for ya!

 

[jdlatil]

Trying to make a decision on kit, but trying to make sure there no issues.
Is there any using the twin turbo kit on 2007 Mustang Gt with the TREMEC MAGNUM XL six speed? I'v seen some pretty tight spots with regular 5 speed.
What is the current wait time for building twin set up?

 

[JeremyH]

It was built around a tr6060 6 speed, have not fitted it to that trans. 6-8 weeks.

 

[Cody Phillips]

I’m having trouble routing my throttle body intercooler pipe. If I go right side of oil filter it hits my harmonic balancer but can’t fit anywhere else