m20b25 turbo manifolds?

[matt0300]

Ok so what's the best bang for your Buck on these? My mind is lubed and ready to be raped with knowledge.

[blueapplesoda]

best bang for your buck? I like the revshift adapter the best for the low boost build.

you got OBX adapters which are real nice, but its an adapter.

You got cxracing manifolds which are ehh~~ alright, not equal length runners, but clears everything* (some have fitment issues) no problem.

you got chinese equal length 3-2-1 manifolds that are better than the cxracing manifolds, but you have to figure out some provision for the oil cooler lines/oil filter (relocation kit)

you got TCD's cast log manifold. its a cast iron log manifold ~ eh.

then you got Jon's 666 fab manifolds.

you got revshifts manifolds and adapters.

did i forget any? all depends on what your budget is and what your goals are...

Derek
DedericMS

[The Humjet]

Cheapest manifold would have to be an m21 manifold notched to fit onto the m20. But they do make the turbo sit close to the valve cover.
I wouldn't both with any ebay manifolds. Even the CX racing manifolds don't fit well.
Revshift adapters are pretty good aswell and flow enough for most people's power goals. I'm actually going for the revshift adapter. The full split pulse manifolds are very good aswell but aren't cheap which isn't what you want.

[acolella76]

I'm thinking about have someone just fab me an adapter similar to the revshift one. Doesn't look too difficult and i'm fairly certain it'll be cheaper.

[JTapper]

I'm thinking about have someone just fab me an adapter similar to the revshift one. Doesn't look too difficult and i'm fairly certain it'll be cheaper.

Not once you pay for the labor and the flanges...

[John@Revshift]

We offer a full lineup of manifolds and adapters to fit just about anyones budget :D

We have the M20 Turbo Adapter for someone who wants to turbo on a budget. We recommend getting one setup for a divided house (Twin-Scroll) as it provides excellent spooling at a low cost.

http://www.revshift.com/shop/turbo-manifolds/bmw-e30/turbo-adapter-bmw-e30-1983-1991.html

We also have full manifolds

http://www.revshift.com/shop/turbo-manifolds/bmw-e30/turbo-manifold-bmw-e30-1983-1991.html

And for people who want serious power we have our full Split-Pulse manifold setup for two wastegates.

http://www.revshift.com/shop/turbo-manifolds/bmw-e30/twin-scroll-manifold-bmw-e30-1983-1991.html

[MonkeyMadness]

Not once you pay for the labor and the flanges...

Not true.
those are easy to build. In fact it kills me to see them sold for so much as it is..

------------------

Low buck bang 524td manifold
Notched or running a Monkeymadness adaptor kit so you don't have to jerry rig the bolt up and do portmatching
for better flow
(Now Offered with all hard ware needed)

http://www.r3vlimited.com/board/showthread.php?t=194426

[blueapplesoda]

thats pretty cool. I like those adapters, but if you are going for any useable amount of power, those 3/524td manis SUCK BALLS. You have to remember that these manifolds were meant for a 2.4l diesel engine that revved out at 5100 rpm. If you want any kind of power, you'll need something that flows. That's where I believe adapters work better.

[LowR3V'in]

Bang for the buck for me would probably be old style header
for like $180 since I can weld on a wastegate provition myself and make a brace.

The new cx racing one is reaaaall shit. Take a good look at that hunk of gargabe. don't buy it.

TCD is just too expensive for a hunk of iron that limits your
turbo selection. $600 :)


Obx adaptor is $250 and comes with wastegate provision so depends on your budget.

Revshift adaptor is going to be the best value for the money imo.
You're going to pay like $360 for a stainless, split pulse, with wastegate provision.
Not a bad price at all.

The china stuff is pots and pans and will need to be braces or it WILL crack.
Pay $100 more for a quality adaptor that also has split pulse.

Hope this helps and good luck.

[The Humjet]

Watched my bosses car on the dyno just tuning his base tune and you could see in such a short time that his quality built stainless steel turbo manifold was glowing bright red.
It makes you think if that was an ebay manifold with that thin gauge steel it would've completely disintegrated in no time. If you can't fabricate yourself then get a quality product like the revshift adapter will be enough for anything less than 400hp

[matt0300]

I'm shooting for 400hp

[John@Revshift]

Twin-scroll adapter mated to a HX35. will flow enough air to make over 400HP.

Should have just enough CFM to make 460 on an m20.

[e30newbie1212]

I too am looking into this and have all but made up my mind on the Revshift twinscroll adapter. What is the wait time for this piece while we have Revshift in the thread? Sorry OP, I don't mean to thread jack

[John@Revshift]

Current build time on a twin scroll adapter is 3-4 weeks. We are working hard to get the build time down significantly.

[e30newbie1212]

Good to know, better then I was thinking! As soon as i find my Holset, I will be ordering mine :) thanks!