ballaudi

I was wondering if it is true that if you put on a turbo head and cam if it actually gives you significant gains especially ported and polished. Does anyone know?

StormChaser404

But it's a mild gain. Frankly, you just don't have the compression to get any big gains without a turbo... The head you want is a NF head, which is the "big valve" head that works with CIS-e. Don't get an NG head, it needs 9injectors in the head, rather than in the manifild.

Alpine 87.5

Between the NF and the NG? Do they come from different cars? Is the NF aftermarket, or can I take it from another engine and put it in my 4k?

Russ
85 4kq

StormChaser404

Both are stock 130 hp Audi engines, 2.3ltr, 10:1 compression. The only real difference is the location of the injectors, NG is in the manifold, NF is in the head (like most CIS cars). The NG came on the 1987.5 CGT and 1988-1990 Audi 90. The NF came on the later 5000.

ddg=shinebox racing

<img src="http://pictureposter.audiworld.com/41804/head2.jpg">

cuatrokoop

You got them backwards, but that is the difference ;-)

StormChaser404

Opps yeah.. NG = Injectors in manifold, NF = in head...