When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Wow 😳 very impressive numbers! The only thing left to do is some more sharktuning, this will further improve performance.
I sharktuned my GTS last year on the open road with my son on the laptop modifying the EZK cells. You can feel the power gain instantly when you have dialed in the optimized numbers. (Loui Ott X-Pipe, 24 lbs/h injectors, GT cams, PEMs in both ECUs)
Wow 😳 very impressive numbers! The only thing left to do is some more sharktuning, this will further improve performance.
I sharktuned my GTS last year on the open road with my son on the laptop modifying the EZK cells. You can feel the power gain instantly when you have dialed in the optimized numbers. (Loui Ott X-Pipe, 24 lbs/h injectors, GT cams, PEMs in both ECUs)
Very nice and impressive work!
There are some "tricks" with Colin's Cams.....because of the "wide LSA" and the valve openings and closings, which we "learned" a couple of engines ago. We took over three different sharktuner maps to the dyno, which we had worked up. Only one of them worked as well as this combination....and in the end, we decided that this "stock" map was really "safe" and worked just as well. If you look at the WOT fuel mixture, it's pretty obvious we made some changes. You don't get "straight lines" without some effort......
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
Yes - I bought it from him in 2005. It's got the correct rear bumper cover now.
And, I’m pretty sure it was bought by Garth from the right coast. I have a few circa ‘99 pictures of it.
Owner at that time told me he was an electrical engineer. IIRC Garth found that out the hard way.
My GTS is now back home in Portland. My wife and I drove it back about 3 weeks ago. Sorry I didn't post an update sooner, but it's been a busy September.
Greg drove the car about 300 miles to sort things out before we picked it up. During that time he Shark-tuned and dyno'ed the engine, aligned the suspension on his new system, and cleaned the whole car.
I had asked Greg to look over the rest of the car and fix anything seriously wrong, as we planned to drive straight back from Orange, CA. He had already replaced the cooling fans and the bulk of the AC system (discussed earlier), so I was relieved that he had found little else to fix. The biggest problems he found were a loose shift rod coupler and a loose drop link in the rear. The torque tube, transmission, differential, suspension, etc. all appear to be in good shape. After all the surprises in the engine compartment, this was great news.
Greg did say the transmission was a little notchy, and recommended Sta-Lube gear oil to correct this. He then offered to change the transmission oil (at no charge) before we left. I agreed and it was done in 15 minutes.
We spent a couple hours at Performance Motorwerks picking up the car. It was nice to finally meet Greg and his family, and to get a look at his amazing shop. While we were there, Greg answered all my questions and gave me lots of tips. After a test drive, we headed back to Portland.
First drive in 3 years
We would have liked to drive up the coast, either in CA or OR, but instead drove straight back up I-5 because of time constraints.
The engine runs and sounds great. It's smooth and responsive, with obviously more power. It also sounds less raspy than I remember. A gentle push on the gas in 5th at 65mph would quickly take us up to 85 or 90. Not a lot of curves on this route, but the areas around the Shasta and Siskiyou Mountains provided some fun.
We had no mechanical problems and ZERO oil consumption over the 1000 mile trip. Back in Oregon, it passed DEQ with the best readings I'd ever gotten .
I wanted to post some pictures of the car now that it's back home, but the weather hasn't been cooperating lately. So I'm going to go ahead with this post, and will put up some pictures when I get a chance.
Congratulations Tom, it’s good to hear you have the car back again and the thread is another test image to the quality and thoroughness of the work Gregg and his team does. It sounds like your car underwent a ton of labor hours and your car was definitively worth the investment! I cant wait to see it in person again.
08-14-2019, 12:13 AM
Can't wait to drive it!
