# Tire-Kicking GVR4s Again \[HELP\] **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [August 13, 2008, 4:11pm UTC](https://forums.speedlife.net/t/tire-kicking-gvr4s-again-help/199030 "2008-08-13T16:11:18Z")\ **Posts on this page:** 1\ **Showing post:** 41
**Author:** ![beat90tsi](https://avatars.discourse-cdn.com/v4/letter/b/43a26b/32.png) [@beat90tsi](https://forums.speedlife.net/u/beat90tsi)\ **Post date:** [August 15, 2008, 5:48pm UTC](https://forums.speedlife.net/t/tire-kicking-gvr4s-again-help/199030/41 "2008-08-15T17:48:51Z")
> [@you tube question](https://forums.speedlife.net/t/you-tube-question/37438/24): > > I’ve never heard of an ISC frying an ECU, and I can’t understand how it would happen. > > But, that’s irrelevant now, nice buy! > > I think the most aggressive cams were the 93-94 stuff. You’re better off going something like HKS 264/272 or so (FP1/Comp equivalent, whatever you can find form some place reputable.) I know AMS did a cam test way back when. I think they made the most power on 264/272 on a small turbo. > > Need to run, but if you need any, post it up. > > Jesse IIRC 90 cams are different, 91-94 are all the same. also, IIRC, that test made the most on 264/264 HKS combo (small 16g maybe?). The 272 had a slightly higher peak, but cost both torque and mid-range hp. The 272s aren’t necessary until the rest of the system is breathing far better than stock. --- _[View the full topic](https://forums.speedlife.net/t/tire-kicking-gvr4s-again-help/199030)._