Miata Turbo Forum - Boost cars, acquire cats.

Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   DIY Turbo Discussion (https://www.miataturbo.net/diy-turbo-discussion-14/)
-   -   Try to keep the pressure on (https://www.miataturbo.net/diy-turbo-discussion-14/try-keep-pressure-37072/)

SPEEDSTER44 07-14-2009 11:58 AM

Try to keep the pressure on
 
I have 1.6 1990 with greedy set up

440 inj
emb
td04h-19t
o2clamp `
rx7 maf
fmic
low compression pistons
2.5 exhaust
mbc

went to the dyno yesterday and tried to push it to 15 psi but i had problem, the boost goes right to 15 and then drop to 11 psi.
I had to turn the screw to 18 psi to get 14 at the end....

Can somebody tell me what wrong i'm sure it's not normal.

Thanks

Braineack 07-14-2009 12:18 PM

search "helper spring" this is very common of the greddy wastegate actuator.

SPEEDSTER44 07-14-2009 12:23 PM

I actually have one do you think it may be not strong enough because it seems very tight with my hand?

Braineack 07-14-2009 12:25 PM

you should simply replace the wastegate at this point, you're asking too much out of a 5psi wastegate.

SPEEDSTER44 07-14-2009 12:33 PM

Do you have an idea of what kind of waste gate i should replace it(something) that is not to much fitiing if it's possible and where can i get it.

SPEEDSTER44 07-14-2009 01:58 PM

Any one as an idea???

ThePass 07-14-2009 03:04 PM

Read this thread I started a little while ago:
https://www.miataturbo.net/forum/t32479/

samnavy 07-14-2009 05:23 PM

Speedster, did you seriosly bump this thread after and hour? Man, it's the middle of the day, and that kind of shit makes you look like douche. I wouldn't even consider bumping my own thread for a response until at least 24hrs.

Wategate actuators can be had thousands of places. Ebay for cheap-chinese knockoff stuff, or you can go for a quality piece... ATPTurbo comes to mind:
Page 1: atpturbo.com

levnubhin 07-14-2009 07:32 PM

I'm extremely happy with my 15 psi Begi actuator. Holds 16 psi all the way to red line.
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