Try to keep the pressure on - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 07-14-2009, 12:58 PM   #1
Newb
Thread Starter
iTrader: (1)
 
Join Date: Dec 2006
Posts: 40
Total Cats: 0
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
SPEEDSTER44 is offline   Reply With Quote
Old 07-14-2009, 01:18 PM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

search "helper spring" this is very common of the greddy wastegate actuator.
Braineack is online now   Reply With Quote
Old 07-14-2009, 01:23 PM   #3
Newb
Thread Starter
iTrader: (1)
 
Join Date: Dec 2006
Posts: 40
Total Cats: 0
Default

I actually have one do you think it may be not strong enough because it seems very tight with my hand?
SPEEDSTER44 is offline   Reply With Quote
Old 07-14-2009, 01:25 PM   #4
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

you should simply replace the wastegate at this point, you're asking too much out of a 5psi wastegate.
Braineack is online now   Reply With Quote
Old 07-14-2009, 01:33 PM   #5
Newb
Thread Starter
iTrader: (1)
 
Join Date: Dec 2006
Posts: 40
Total Cats: 0
Default

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 is offline   Reply With Quote
Old 07-14-2009, 02:58 PM   #6
Newb
Thread Starter
iTrader: (1)
 
Join Date: Dec 2006
Posts: 40
Total Cats: 0
Default

Any one as an idea???
SPEEDSTER44 is offline   Reply With Quote
Old 07-14-2009, 04:04 PM   #7
Supporting Vendor
iTrader: (3)
 
Join Date: Jul 2006
Location: San Diego
Posts: 2,863
Total Cats: 485
Default

Read this thread I started a little while ago:
https://www.miataturbo.net/forum/t32479/
ThePass is offline   Reply With Quote
Old 07-14-2009, 06:23 PM   #8
Elite Member
iTrader: (7)
 
samnavy's Avatar
 
Join Date: Apr 2006
Location: VIRGINIA BEACH, VA
Posts: 6,020
Total Cats: 175
Default

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
samnavy is online now   Reply With Quote
Old 07-14-2009, 08:32 PM   #9
Elite Member
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

I'm extremely happy with my 15 psi Begi actuator. Holds 16 psi all the way to red line.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
Recommended Tire Temp for best friction thumpetto007 Race Prep 4 09-27-2015 06:16 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:38 AM.