new twins driver

[swankmetal]

really digging them so far, i'll tell you what. got a few ?'s though. my set-up is a 35-40/12cm coupled with a bht3e/23cm on bottom. no external wastegate. i think i will change that when i get a new exhaust manifold though. anyway, my questions are:



1. can you bark twins? or does the big spinner keep that from happening?



2. is there a way to make a bypass for a stock wastegate? i'm getting 10 psi at 65 mph and would like to drop that a little by opening the wg at high rpm's.



3. uhhh, i forgot.



dave

 

[vssman]

I'm guessing the first thing would be to drill out the web in the housing between the front and back passages. I've heard that the w/g only dumps the front 3 cylinders. You could also increase the size of the w/g hole.

 

[swankmetal]

did both of those a while ago. really helped when i was running a single. i'm sure it's doing the same now. thanks for the tip though. i appreciate it.



dave

 

[swankmetal]

just remembered what #3 was. i've read about guys getting a vacuum reading between the turbos until the wastegate opens. i'm not getting any of that. the gauge stays at 0 until about 15 or 20 psi, then it starts coming up quick. just wondering if that's normal, or if it has something to do with the smaller (than what most of you run) exhaust housing on the big turbo. thanks.



dave