G_RIDE

are there any issues with running a un-divided manifold with a divided tubo housing. I know there is a performance loss there but I figured I could always upgrade the manifold at a later date when i save a little money. I just dont want to ruin the divided turbine housing

nik

I plan on doing the same. 1.15 A/R divided housing on a HKS cast manifold (undivided). I have seen pics of setups like this... I Imagine there will be some losses of efficiency, but it will have to do for now unless it will lead to some kind of of failure.

aruba

are u running a gt42
that turbo is pretty big
how the hell do you fit that in the engine bay
am waiting on the my gt42 with a 1.01 but am not sure i iwll be able to use my hks cast manifold
i just think i need to make a custom one were the turbo sits all the way forward
any body with pics would be great

jimmyv13

I am wondering this also...I have an HKS log manifold and I need to replace my on-center housing with a tangential. I found the turbine that I want, but it's divided. What are the ill affects toward running this set up?

RacerXtreme7

iTrader: (2)

Your spool will be slower and your top end suffers. In otherwords, they'll be losses in effiency. Furthermore, eventually the divider in the turbine housing will develope cracks and will also warp. Best thing to do is to do it correctly the first go around. If you want to run a non divided manifold, get a non divided turbine housing. Turbine housing can be had cheap new from Garrett dealers and even cheaper if found new or used on forums and or eBay (ok cheap is a relative term, but doing it once is cheaper then twice espcially when you can sell the divided one before you ruin it redering it useless and having to re-do all the plumbing). It is however, ok to run a divided manifold with a non divided turbine. It wont spool as quick as a compairable sized divided turbine, but at least you wont hurt the turbine or manifold. But again, as cheap as turbines are, why do it half assed?

Side note. I've seen this many times, someone saying they'll replace the manifold at a later date. They end up getting the car running and are dissapointed with the lack of response. Then they realise that all the plumbing (downpipe, wastegate, intake disscharge/intercooler pipes, turbo inlet pipes, oil feed, oil drain, water lines etc) need to be reworked or replaced costing an *** load more of money to put in the manifold they originally wanted. So they get tired of their non responsive car and sell it rather then invest more money in it. My suggestion is to do it right the first time. It'll save you in the long run and you'll be happier with a car that responds like it should. Its sad to see a laggy car making marginial power levels when theres set ups were you can have very responsiveness makin over 400 at the wheels.

~Mike.............

Zero R

iTrader: (1)

You can do it, and do it without losing much, but you need to run a collector first. Then cut it back in the shape of a C about .5 to .75" chamfer/radius the edges DO NOT KNIFE EDGE IT. It wont crack, it will help retain spool. All that said, If the option exists to go the right way, just go about it the right way. Fully divided manifold with a divided turbine housing is a nice setup on rotaries.

-S-