True "Bolt-On" Exhaust Manifolds

[Ceddy]

What after market exhaust manifolds out there are true bolt-ons?

By bolt-on I mean the turbo flange, is in the exact same position left-right and up-down, and angled the same.

So zero modifications would be needed for the exhaust.

I think the FP manifold is angled out so turbos with large covers will clear the block. I'm not sure about any other ones.


Also at what point does the stock manifold become a restriction? My new turbo maxes out at 52 lb/min, is an upgrade a must?


Thanks for the help.

 

[1gDSM4g63]

I think the FP Manifold it in stock position as oppose to tubular manifolds. If it's is slightly off it would be by a couple of cm and it wouldn't make a difference because they downpipe can shift be of the exhaust flex. Basically a downpipe that has a steel flex can shift anywhere you want.

I'd recommend a FP Race or a port 2g manifold.

 

[KPEclipse]

tubular or fp race is the weapon of choice. the 2g manifold(ported) can flow enough for 500 horse though...if you port a 2g unit you will probably feel the difference with that size turbo...and you may decrease spooltime

 

[tkelly27]

I think most ones that use the DSM flange require no other modifications. I'd go with the FP one or porting the stocker like everyone says.

 

[spooled_u_1st]

Or an evo III manifold.

 

[Ceddy]

Thanks for the replys guys.

I have very little clearance between my flex and oil pan, if the downpipe was shifted at all it would probably hit. I have a lot invested in my O2 housing and downpipe and don't want to have change anything.

I didn't know a ported 2G performed that well. I'll probably try that out as a nice economical solution.

 

[1gDSM4g63]

In your profile it says you have a 16g and I don't know how you setup it up as but you should have no problem. The 16g is a fairly smaller turbo. I mean it is a t3, t4 or super sized 60 trim bolt-on.

 

[Ceddy]

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New turbo is a Holset WH1C(HX-35) in a BEP .55 A/R DSM Flange Turbine Housing
Flows 52 lb/min, fast spooling.

 

[architechnik]

Where's the rest of it?! It doesn't look like there's a turbine housing on that thing. ??

 

[Ceddy]

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[gixrman]

I say the FP cast is your best option.

 

[my98gsx]

I had a few tubular manifolds with a big tubro like yours on it, and they all broke. Like everyone said i would go with the FP race manifold. its by far one of the best parts i bought for my car. I wrote this tech article up a few months ago; check it out:

http://www.dsmtuners.com/forums/art.../304008-forced-performance-race-manifold.html

 

[1gDSM4g63]

Ah I see, a Holset. I went through a lot of fabrication to make my HX40 with a BEP .55 housing to fit. But I switched to a T3 housing after wards because that turbo doesn't deserve to be in a restricted housing or manifold.