Exhaust Manifold

J-O · Post by **J-O** » Fri May 21, 2004 12:33 pm

Hi!

As anyone here installed and aftermarket exhaust manifold?

If yes, is it worth getting this part, what gain did you get?

Finally, what compagnies makes these for Polo 1.4 16V (i know supersprint does)...

J-O · Post by **J-O** » Sun May 23, 2004 10:15 am

Erik@aat · Post by **Erik@aat** » Fri Jun 04, 2004 10:53 am

Benefits of a manifold depend very much on the car you're fitting it to. There should always be a gain from an after market manifold, unless it's badly made/designed. I've seen figures of 15bhp from manifolds, which frankly I find a little absurd although I've seen a 1400 gain 7bhp from one of our Sorg manifolds ~ usually I'd say you will do well with a 4-5bhp increase.
Sorg manifolds are staniless steel so should last for the time you have the car but unless you're really going to tune the engine etc I'd spend the money on alcohol and take aways

Post by **Josh_PoloGTi** » Fri Jun 04, 2004 11:47 am

Erik

I like your way of thinking!

daffy · Post by **daffy** » Fri Jun 04, 2004 12:21 pm

would that be on the 75hp model or the 100hp model?

KarlM · Post by **KarlM** » Fri Jun 04, 2004 8:00 pm

from what I've heard it isnt worth investing in a manifold anyway - because of the way VW engines move under acceleration it will crack. If someone reckons it wont crack get a written reciept.

*I found this out while talking about 2l golf engines, but i would assume its the same for all VW engines

4paws · Post by **4paws** » Fri Jun 04, 2004 8:21 pm

ive heard that too, only heard of the problems on a golf as dont know anyone with one on a polo

hardhitter · Post by **hardhitter** » Fri Jun 04, 2004 8:39 pm

I've heard plenty of stories of golfs cracking the exhaust manifolds (especially stainless ones). Its a different car with different circumstances (so don't assume it's the same) for a start the manifold is at the back of the engine. Golfs need uprated engine mounts to stop it happening.

With a polo, providing the engine mounts are fine and you have a flexi on the exhuast it will be fine. It depends how restrictive your existing manifold is and what other mods you will be doing to say if it's worth having one or not.

4paws · Post by **4paws** » Sat Jun 05, 2004 5:56 pm

fair point

GroovyCarrot · Post by **GroovyCarrot** » Sat Jun 05, 2004 11:54 pm

Is it true that mk2 manifolds were deliberately restricted for some reason? Can't remember where I heard that, probably someone on here.. anyone know of this?

Tahrey1043 · Post by **Tahrey1043** » Sun Jun 06, 2004 4:14 pm

Re: manifolds cracking under acceleration. That would explain why my exhaust manifold gasket keeps falling to bits every 9000 or so miles!

Re: restriction on mk2 air boxes.......... i havent any knowledge on that at all, but speculation wise - some GT/G40 mk3 boxes were apparently restricted (to keep it off the limiter so much), and so there's precedent for it. Plus a rev limiter wasn't standard mk2 equip, so something to knock the top-end power off is probably a smart idea even if it hurts the performance a little

chubbster · Post by **chubbster** » Wed Jun 16, 2004 1:09 pm

@J-O .....Criz has had one done dont know which make it is or if its custom, u should ask him. his cars in the rides section. hes claiming 130 out of his 6n 16v with other stuff on it as well. PM im sure he'll be able to help u