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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 07-14-2009, 11:58 AM   #1  
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Default 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
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Old 07-14-2009, 12:18 PM   #2  
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search "helper spring" this is very common of the greddy wastegate actuator.
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Old 07-14-2009, 12:23 PM   #3  
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I actually have one do you think it may be not strong enough because it seems very tight with my hand?
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Old 07-14-2009, 12:25 PM   #4  
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you should simply replace the wastegate at this point, you're asking too much out of a 5psi wastegate.
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Old 07-14-2009, 12:33 PM   #5  
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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.
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Old 07-14-2009, 01:58 PM   #6  
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Any one as an idea???
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Old 07-14-2009, 03:04 PM   #7  
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Read this thread I started a little while ago:
https://www.miataturbo.net/forum/t32479/
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Old 07-14-2009, 05:23 PM   #8  
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Speedster, did you seriosly bump this thread after and hour? Man, it's the middle of the day, and that kind of **** 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
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Old 07-14-2009, 07:32 PM   #9  
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I'm extremely happy with my 15 psi Begi actuator. Holds 16 psi all the way to red line.
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