Join Date: May 2000
Location: Columbus, Ohio USA
Old combo - stock block/edel 6037's/e-cam/1.7's/cobra intake/full exhaust/zex 125 shot.
New combo - 8.5:1 306/gt-40y's/stock cam/1.7's/cobra intake/DIY Holset WH1E setup at 5psi.
I can tell you that my new turbo setup at only 5psi seems to be a little quicker than my old setup with better heads/higher compression/and the 125 shot. This project was my first experience with a welder and as such I still have some pre-turbo leaks to get under control, so I know there is more response in the setup, but as it stands, I have 3-4psi of boost the instant I step on it, and have full boost a split second later from 2800 on. I had my window switch setup for 2500-5500 on the spray, so the added power has roughly the same power band. Only drawback I've had so far is mostly due to gearing (3.73's/tremec) and my leaky first stab at welding/fabricating the crossover. Between the two, first gear doesn't really load the motor up enough to get boost until 5000rpm. I'm gonna go back to the stock 3.08's next year which should help that. Most of the racing I do is from a roll though, so it doesn't bother me, every other gear has full boost by 2800 rpm.
One other thing people seem to forget when comparing turbos to other power adders is PART THROTTLE BOOST! This makes the car just feel stronger in general on the daily commute. Even if you don't actually get into boost, from a quarter throttle or so on, the car will pull harder for a given amount of throttle as compared to n/a. In third and 4th gear I can get 3psi at half throttle at almost any rpm. Makes for a nice surge of passing power without having to open her up. Plus, you can rip on it all day and not have to fill your bottle. I also can't remember how many times a random race came up where I fell victim to bottle pressure, as in 600psi + zex 125shot = is this thing on?
This biggest question if you want the power is really money. If you can afford to go turbo, I would definately choose it over nitrous. If a long-term savings plan is in order for a turbo kit, then you already know nitrous is fun and cheap. That would probably be my determining factor.
-DSS low comp. 306/GT-40Y/Cobra U/L
-DIY Single Turbo - Holset WH1E @ 7psi intercooled
Last edited by Powershift95GT; 11-12-2005 at 05:19 PM.