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Model specific boards => Golf mk2 => Topic started by: Harooshum on 05 October 2003, 16:55

Title: bigger inlet manifold
Post by: Harooshum on 05 October 2003, 16:55

I have seen a flowed inlet manifold for sale for my '91 16v.  It is a 50mm item, and should be a straight swap for my old one.  It was a standard item manifold which I think has been BORED out.

Someone told me that by doing this to my STANDARD 16v, this will increase pressure on the head, and blow the head gasket when accelerating hard.

I cant see this being a problem simply by allowing more air to the injectors!!! Can anyone shed a light on this???

Harry

Title: Re:bigger inlet manifold
Post by: golfvr6 on 05 October 2003, 18:30

It won't make the head gasket blow. You will just get more air into the cylinders which should be a good thing as long as the fuel mixture is set up correctly.

Title: Re:bigger inlet manifold
Post by: Harooshum on 05 October 2003, 19:21

Exactly what I thought!  Are there any downsides to using this new manifold?  Coz I thought it would only be worth doing in conjunction with polished/ported head and polished/ported exhaust manifold.

I plan to leave the rest of the engine pretty much standard, so this manifold should just give me a power increase, and I wont lose any reliability?

Harry

Title: Re:bigger inlet manifold
Post by: golfvr6 on 05 October 2003, 19:31

Pretty much yeah.

Title: Re:bigger inlet manifold
Post by: mk1 on 05 October 2003, 20:07

The 50mm manifold will give more power at high rpms, the smaller (46mm?) was used to increase torque at lower engine speeds. Fueling will not be a problem as the flow meter measures the amount of air the engine is using and fuels accordingly and you will not be near the max flow of the fuel system.

Title: Re:bigger inlet manifold
Post by: golfvr6 on 05 October 2003, 21:25

Yep, just don't turbo it without lowering the compression ratio.

Title: Re:bigger inlet manifold
Post by: Harooshum on 05 October 2003, 22:19

it was an ebay auction item. I waited till the last 7 secs before the auction end, and placed a bid.  Then, someone bid 3 seconds after me!!!!

DAMN IT!

Lost it! I'm sure it will cost more than ?50 to have mine bored out, was a wicked item tho!

Harry

Title: Re:bigger inlet manifold
Post by: golfvr6 on 05 October 2003, 22:24

Don't worry mate, i doubt it was that good!