I submitted the request to have the 510 cam superseded for several reasons. The most important one was that the new cam I used in '97 is no longer legal today because the SCCA Competition Board knows it and all my competitors knew it because I advertised the coating sponsors all over my car. The cam was coated.
The truth is that I only listed the SCCA Appeals # 93-60-MW (supplied to me by Ryan Williams)in my request stating that VW set the Precedence to use a superseded cam as the stock cam was NLA. I made no sugestion that the "G" cam is illegal or be denied as the legal cam.
The "G" cam represented a change from 0.405 lift to 0.423 & the duration went fron 225 degrees to 283 degrees.
In my request the cams lift would remain the same as the late 510 cam and there would only be a + & - 8 degrees duration adjustment. My main reason is to have the ability to at least be able to use a new camshaft. The "G" Cam would still have more lift and duration.
The data below if correct does show that the ITC VW's benefited by a 0.018" lift increase and 58 degrees duration improvement.
http://www.autotech.com/cam_vt.htm
The following data is listed on Autotech site. As to it's accuracy I am only assuming it is correct.
8 VALVE CAMSHAFTS
Perhaps the most important thing to remember when searching for that "perfect camshaft" is this:
Don't be mislead by the numbers! The lift and duration of a camshaft are not the only features that make a cam behave the way it does. Things like ramp profile, lobe center, and nose shape all affect a cam's behavior. It is virtually impossible to determine exactly how a cam will perform, or where it makes power, just by looking at the numbers. Ultimately, all of a camshaft's design aspects play a role in how it will perform.
Solid Lifter Camshafts
From 1975 to the middle of 1980, the specs of the original cam were 0.405 inches lift with 225 degrees duration at .050" check clearance. On later cars, including the Rabbit GTi and Jetta GLi models, the cams were made more docile for pollution control and had a lift of only 0.387 inches, with slightly less duration than earlier.
European GTI Camshaft
What we consider to be the best all-around street cam for solid lifter engines. Originally used on the European Golf 1 GTi, this cam is called the European "G" cam (is also sometimes called the "N" cam) featuring a 0.423" lift and a duration of 283 degrees (225 degrees at 0.050" check clearance). Power gains are seen from 2000 up to 6500 rpm, netting an 8 to 10 horsepower gain. SportTuned valve springs are not required, but are highly recommended for the best top-end performance.
Lifetime warranty from Autotech.
European GTi Camshaft 10.109.423 $119.95
I did however request that if approved I wanted it listed on the spec line.
I do feel that I should refrain from any additional comments.
I have added my email address if anyone wishes to contact me directly.
Regards,
Harry
[email protected]
[This message has been edited by Harry (edited October 24, 2003).]
