I am now playing a serious waiting game... I just ordered The 75mm throttle body and th ignition upgrade kit from troyer, also waiting for my XCAL2 I cant wait! I already have TP Underdrives, and AF1 in the garage. I am going to make a day out of it. Ignition, Throttle body, Clean plenum, Underdrives, AF1, and XCAL2 all in one day. I am also going to run a 1/4 mile with my Gtech pro and get 0-60 and horsepower estimates. Then I will run a 1/4 afterwards, all with premium of course. I will post the time differences.

 

dont forget to port and polish your upper intake manafold to match the new larger throttle body

 

Is there a process to doing it??

 

Hi Kickin,

What he's talking about is basically "port-matching." When you compare how the 75mm TB mates up to where the stock 67 mm unit mated previously to the stock throttle body "elbow," you will see that for absolute maximum effect, the throttle body "elbow" can use some routing out so as to match the larger diameter of the new 75mm TB. You can easily do this with a dremel tool. Then if you want to go even further, you can continue to polish up inside the length of that elbow.

Now the only thing that has potential for adding more power is the port-matching, so that the opening of the elbow matches the 75mm diameter of the new throttle body - continued to hog out all throughout the entire elbow results in minimal gains by comparison, though it is something that a number of people do - and it certainly can't hurt. If time is a factor, pick up a spare TB elbow from a junkyard vehicle, and work on it in your spare time - meanwhile you can run around with the new 75mm TB bolted right up to the stock elbow - then once you get the port-match & polishing work done on the other elbow, just swap them out & pick up a few more ponies!

Have fun,

 

Thanks mike!!! A big thanks to Crystal too, I got my stuff today!!! Shipping was fast! Now all Im waiting on is my XCAL2 . I will be putting everything on next weekend. I cant wait!!

 

Finally got all of the stuff on, cant wait for my tuner!!! Sent worksheets back Aug 23.... Anyway, I can spin my 33's with a 3.55LS rear end for about a foot now . Havent tried to brake tourque it yet ....

 

Hi Kickin,

Glad to hear your parts are coming in & the performance is increasing!

Some tips on the G-Tech & testing methods in general - make sure your G-tech Pro has the latest firmware download, and then make sure to also recalibrate it each time you break it out for use - otherwise they can get a little brain-whacked. We've found they are most accurate when you calibrate them prior to each use cycle. And of course, remember that comparing performance on different days doesn't give you proper back-to-back test results - to get that kind of result, the before & after has to be done on the same day within a narrow time frame, with temperature, humidity & barometric pressure recorded, as you'll never get two different days with identical conditions, and small variances in any of those areas will have a significant impact on the performance of any computer-controlled vehicle, even more so than older carbureted vehicles. This is just some quick general FYI stuff, you may already be aware of, but just in case.

Good luck & have fun!