Wastegate creep before desired boost pressure

[Guest]

I found this write-up in the Autospeed tech section along with several other very helpful boost related enhancements. I have an article somewhere on a DIY modification that blocks boost pressure to the wastegate until the desired boost level is reached. I didn't think a whole lot of it because no data regarding performance afterwards was provided to show how much of an improvement would result, to justify the effort that I can recall.

The Autospeed link changed my mind when it's tests on a stock turbocharged engine resulted in reaching the stock boost setting 750 rpm sooner, that's a very significant increase that should take quite a bit of time off a quarter mile track run when you consider boost will come on much sooner between every shift in a manual car. In an automatic only the launch would benefit since boost is generally sustained after that.

The term boost creep is also thought of in terms of exceeding desired boost pressure.

http://autospeed.com/cms/A_1053/article.html

[ForcedFirebird]

It's amazing that adding a 6' length of WG line took 500rpm off.

It's always been said to keep the lines as short as possible and never gave second thought to that "general rule", but now this may be something implimented on the 'Bird

[Joseph Upson]

It's amazing that adding a 6" length of WG line took 500rpm.

It's always been said to keep the lines as short as possible and never gave second thought to that "general rule", but now this may be something implimented on the 'Bird

Speaking of the Bird, when are you going to put "wings" on that thing anyway? I hope you're not waiting on me to finally get my turbocharged-turd (so far) running.

[ForcedFirebird]

Haha. I wish it was that I was only "waiting" for something. Time is my biggest enemy, four kids, two jobs etc...

The lack of progress lately is the mill has been booked up and haven't had a chance to make my turbo flanges. Still have a shopping list of things to buy too, but I'm wanting to at least run this summer 1.5 yrs in the making of my own, and got Loner's done in a few days...makes me jealous at times that I help so many cars go fast all the while mine sits and collects dust.

[loner666]

1.5 yrs in the making of my own, and got Loner's done in a few days...makes me jealous at times that I help so many cars go fast all the while mine sits and collects dust.

Mines been sitting for 6 months now so dont feel to bad. I think Im about ready to tear it apart since I finally changed the oil again and found an unpleastant suprise in it. Im going to pull a couple minor things first to see if I can find the issue before hand but it doesnt look to good. I think I discussed it with you a few weeks ago when I was talking to you about the work I need done