Quote Originally Posted by Bill Miller View Post
And the Rabbit GTI was one of the cars that was run through the process during tGR. How'd the 1.4 power factor get justified? And more importantly, where is it documented?
I don't know any specific answers, but the Rabbit GTI should make more gains than either Golf in ITB. It has the WORST exhaust manifold ever installed on a VW - swapping from the toilet bowl single outlet to the later dual outlet gives a 5hp bump on the A2. It has a lower stock compression and thus gains a bit more % wise with the .5 bump. I don't think the solid lifter head has any measureable differences from the later hydro. I would be surprised if it all added up to a 1.4 factor, but could see it being .05 more than the A2.