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 Post subject: Camshafts for G13B twin Cams
PostPosted: Wed Oct 26, 2016 9:42 pm 

Joined: Sun Apr 13, 2014 12:06 pm
Posts: 15
Location: Melbourne
Hi Everyone,

I am wanting to put some hot camshafts in my Mk1 GTI , type 3-4. (mark 1 gti, 86-88)

My cylinder head flow heaps with a potential of @195bhp, but I am chasing @130-140bhp so I can maximise the torque.

I have some specifications for a camshaft profile. But I would appreciate some feedback on other camshaft profiles that others have been using.

One camshaft I am looking at using has;
0.427" lift
74-50 ex
54-70 in
104 degrees phase
304 degrees advertised duration

The second camshaft profile has the following specifications;
0.303" lift
73-34 ex
34-73 in
no details on the phase
287 degrees advertised duration or 239 degrees duration at 0.050" lift (hydraulic)

Any suggestions on camshafts that are equal or close to these profiles?
Also, brands and where I can buy them.
Also, are billet blanks available now?



 Post subject: Re: Camshafts for G13B twin Cams
PostPosted: Thu Oct 27, 2016 6:58 am 
User avatar

Joined: Sat Jul 31, 2004 3:38 pm
Posts: 1072
Location: Qld.
Sticky post in the Technical Forum:
START HERE - Technical FAQ-1986~99 Swift
Engine - CAMS:
GTi CAM Spec's

Full spec's of the Tighe Engineering GTi CAMS
suprf1y talking about CAMs and the meaning of spec's

DOHC CAM Timing - diagram and links to to the manual pages

These are mostly advertised spec's (and the @ 50 will be in brackets if known).

The 1044. 800C, 817C and 793C CAMS are up in the advertised duration you've listed.

3Tech were still doing exchange reground cams - contact them to see if they have a suitable race spec profile. Click the links for Tighe Engineering (Australia) and Piper RS (UK). Waggot and Camtech have done GTi regrinds in the past but I don't have contact details or know if they still do them. New billets are rare now so most will be talking reground profiles.

Motrosport / Dyno - you will see some of the cam profiles used and the end result on the dyno.

Harris Motrosport would be someone to talk to and maybe organise cams for you - they are building and racing MK2 and MK3 GTi's. Youtube for a couple of clips of their cars running.

Where did the spec's you've listed come from and a link to them if possible would be good.

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