Exaust and backpressure

[GoLfMan]

With my 1976 3 door golf which i am doing up to race, i was thinking of a 2 1/4inch stainless steel engine to outlet system. does anyone know what the 'right' kind of exaust and back pressure is needed for best performance

[Golf Loon]

That sounds quite large. What size engine is it? If you dont have enough backpressure, you`ll lose heaps of go. I`m thinking 2.5inch for my 2L 16v
That size with a 1.6 would be no good though.

[Anonymous]

yeh sorry i forgot to say... its a 1600 carby.... yeh i think ill just leave the stock piping in there and put on a new muffler... do you think that will work at all?

[GoLfMan]

yeh sorry i forgot to say... its a 1600 carby.... yeh i think ill just leave the stock piping in there and put on a new muffler... do you think that will work at all?

that again is my post i keep forgettting to log in

[Golf Loon]

1600

Has it got extractors? They make the 1600s howl, especially if you drill out the main jet in the carby, or replace it with an auto one.

[GoLfMan]

no i havent got extractors atm... stock as a block . but i have a carby that i got off my renault 15 (which is going to wreckers tommorow cos it has so much rust) and the carby is a double barrel (both barrels 41mm ) webber. but the manifold bolt pattern doesnt match up. will i be able to fit this carbi on?
i was wanting extractors

[Golf Loon]

If you can cut and weld up a golf inlet manifold, you might be able to make it fit. i think its alloy though, hard to weld.
I`ve got some brand new extractors, which dont fit my 16v. 200bucks never been on a car.

[GoLfMan]

well ill take my car to Volkspower to see what they can do, and to see if the carbi is worth putting on. im a Melbourne man. extractors you say? would they fit a mk1?

[Golf Loon]

The extractors are made for a Mk1. I paid 300 for them, but have now got a 16v, so dont fit my car. Bargain $200 postage $40approx

[GoLfMan]

Ill think about it .... thanks

[GoLfMan]

im seriously thinking about those extractors but CV Joints and wheel bearings are first. with the exaust i was thinking just leave the stock piping and put a free flowing muffler on it. would that do any good?

[Golf Loon]

The golf exhaust is so basic that it couldnt really restrict flow even stock. The worst bit is the manifold and downpipe which strangle it. Thats why everyone goes extractors in the end. FLOW = GO

[GoLfMan]

hmm sounds good. have you still got those extractors that you wanna sell? cos i want them as soon as i get the money. also that webber your seeling for the golf. the delorto can i trade you a downdraft weber double barrel 41mm for that??

[TassieGTi]

Carby

The Renault carby will make a great improvement.I have a 2 barrell manifold and an 2 into one adaptor if needed.
Better still I have a side draft dellorto and manifold.
If you use a 1600 motor don't go bigger than a 2 inch system, the original twin manifold downpipes are quite efficient and there are very small gaines by using extractors but 2 ich system and free flow muffler certainly gives a noticable improvement.

[GoLfMan]

i should take some fotos , so this adaptor can you chuck some fotos my way???.. you have twin delortoes and manifold how much do you want for them?