The reason that you don't use a split turbine on an open collector is basic airflow and HP. Because of the design of a manifold, the airflow directed at the plate is never even, even in my manifolds, which are as symetrical as physically possible with the merge collector, with the gas directed at an agle accross the face of the split, the air can't make a decision which side to go up. This is probably a bad example of what I'm trying to at, but basically, the air is turbulent, and in most instances (as in not very well designed manifolding) the air will try and be forced more to one side of the split, effectively halving the cross sectional area the exhaust gas tries to pass through, kinda like putting a tiny rear housing on your turbo. One of the companies i deal a lot with that has a 8sec turbo hemi, has tested many different turbos and housings over the years, and picked up 72rwhp and 9 MPH just by changing from a 1.32 split rear on his P trim T66 to a .96 single entry on his single entry manifold, as the .96 is smaller in equivelent size, so all of that power was due to better gas flow, it also picked up 900rpm of spool up time. Basically, airflow will never be even in a divided housing, with an open collector. 6BOOST

some pics of Kyle's work.

more

yet more

Thanks mate Can't wait to see how it performs, I'll arrange the tuning for you monday, I love that low mount manifold, I'm gunna call it the "Twister" Hope your happy with it all mate, feel free to call me anytime for help. 6BOOST Some original photos have not been recovered yet.

no probs, did the inlet this arvo, just enough room to clear the ps pump. 4" inlet rocks! i can fit my damn fist in it!

looks good grantos hurry up now and get it running.......... gtr's Some original photos have not been recovered yet.

Don't forget to put at least a CM or 2 of stright where it goes on the front of the turb so you can get a hose clamp on there and it stays there............. Reliably!!! 6BOOST Some original photos have not been recovered yet.

lookin good Grant was hopin to hav my motor n box back in this weekend but doesnt look lik i will havent drained the oil from the convertor yet will do that 2moro tho and finish rebuildin teh motor so u runnin a 35R Grant? good luck wit it mate looks lik another great manifold Kyle cheers Troy

Na, not 35R, just a baby with small rear, its all about response, not power. 6BOOST Some original photos have not been recovered yet.

yeah, gt3082r, only 600hp rating. pic of heat shield as well.

that looks fantastic grantos, very impressed. you guys have too much money, throw some my way.

nice grant Some original photos have not been recovered yet.

Very nice kyle.. love how you clean those welds up. i bet that collector is a bitch to make Some original photos have not been recovered yet.

cant wait for mine Some original photos have not been recovered yet.

Quote: Originally Posted by BADVLSL love how you clean those welds up. Its called TIG welding.......

actually ryan its call GTAW Some original photos have not been recovered yet.

TAFE nerd Some original photos have not been recovered yet.

hahaha homeschool boy! Some original photos have not been recovered yet.

Is that a problem Mr All Boys School prefect?? Some original photos have not been recovered yet.