the reason i ask is that I'm running low on funds to complete my turbo project...i have the .35 bar tial wastegate (5psi) and was going to get a boost controller so that I can run 7psi. If i were to just get the .45 bar wastegate instead (assuming I can exchange it since its still in box) would I be able to skip the boost controller or would I still need it to control boost spikes? thanks for any info

 

If money is tight, then get it later. A boost controller will make maximum boost come sooner though. Build your own MBC, it's easy.

 

Yes, I went to Lowe's and for i thinke $2.10 i made my own....but i made mine different, i used two springs, one bigger than the other, and used the bigger spring on the wastegate side, then put the ball bearing, then the small spring on the vac source side. worked great 100% of the time.

 

Post a diagram of it please!!

 

yah I'm interested also.

 

Hehe, ill try, but im no artist....

 

it goes like that.

The right side of the picture, you connect it to the vac source. and the left side connects to the vac line from the wastegate.

*oh yeah, its copyrighted, patent pending *


[Modified by CDooMe2, 8:25 PM 8/1/2002]

 

actually go here... http://www.c-speedracing.com/howto/mbc/mbc.html

 

like my crop job....c-speed has the normal way....mine way is a tad different

 

just curious but why did you decide to use the smaller spring also?

 

Hehe, well, when i first made it....I didnt like the way it felt. so i took it out, and just sat there and looked at it. Then i thought, Ok, with just one spring....the spring is pushing the bearing to one side while in vac. Then when you boost, it pushes the spring backwards. well dont ask me why, but i decided to put a smaller spring on the other side....but...it works good...and very smooth. no justification of why i tried it....just did, and it worked....hehe i wont lie...just pulled it out of my ***.....

 

Is it going to seal right on the boost side, since it has that spring in the way?

 

Yep, seals perfect.....

 

*** now to anyone who tries this....I havent seen this anywhere else, so maybe im just weird, and got some weird fittings....this way works by far the best for me. It may or may not work for you, Just please be very careful if you guys try this, and watch your boost gauge very very closely. i dont want anyone blowing up their **** ***

 

My question is, with these self made versions...say i've got it put on and I'm about to try it the first time. Well, it has no settings or numbers on it telling you how much to turn and which way for a certain psi. So how the heck do you know when you first put it on that you havent accidentally set it to run 25psi? Then you start your motor up and take her for a spin and end up having to walk home? I mean, there is absolutely no point of reference to go by.


[Modified by KC GSR, 8:54 AM 8/2/2002]

 

yah... same question here

 

By a weak spring, and hope that you can shut the engine down fast enough to avoid spitting all your engine parts out your oil pan!

LOL

Well, I like to do things right, so I would never use a device like that. Its either the correct wastegate for me, or a boost controller.

 

thats what i'm thinkin. Plus I figure, i've spent close to 3 grand anyway when everything will be all said and done...why shortcut at the very end and ruin it all because I didn't want to spend the extra 70 bucks to get a turboxs boost controller or something, even if money is tight. I'll probably get the other wastegate.


[Modified by KC GSR, 11:05 AM 8/2/2002]