Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

Tighten Greddy Wastegate?

 
Old 03-08-2007, 10:57 PM
  #1  
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Sep 2006
Location: Hong Kong
Posts: 523
Total Cats: 0
Default Tighten Greddy Wastegate?

Hay guys,

when you tighten up your factory Greddy wastegate, how many turns were you able to tight up?

Cheers,
Mimime is offline  
Old 03-08-2007, 11:17 PM
  #2  
Junior Member
iTrader: (2)
 
Join Date: Jul 2006
Posts: 482
Total Cats: 0
Default

till it bottoms
rappadan is offline  
Old 03-08-2007, 11:28 PM
  #3  
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Sep 2006
Location: Hong Kong
Posts: 523
Total Cats: 0
Default

I went to check if there is any slack from the pin and rod, it was holding tightly without slacks. Should I still be tightening it up alittle more than?
Mimime is offline  
Old 03-08-2007, 11:48 PM
  #4  
Guest
 
Join Date: Mar 2006
Location: So Cal
Posts: 407
Total Cats: 0
Default

you are probably tightening the wrong part... the bottom part with the nut should be tight all the way down. you also need to turn the END of the wastegate actuator the area with the hole in it. Tighten that down all the way also
krayzrac3r is offline  
Old 03-08-2007, 11:57 PM
  #5  
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Sep 2006
Location: Hong Kong
Posts: 523
Total Cats: 0
Default

I hope this photo would make it clear!

krayzrac3r: is this the part we are talking about?
- I have to loosen the part(2) in order to tighten up part (1).
Attached Images
File Type: jpg
DSC00049(s).JPG (23.0 KB, 111 views)
Mimime is offline  
Old 03-09-2007, 08:50 AM
  #6  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,610
Total Cats: 2,314
Default

backwards:

loosen the nut all the way. (dont spin the rod that goes into the wastegate can.)

pull the pin off.

back the end as far in as possible, so the entire rod is shorter.

you should almost have to pull the rod forward to put it back on.

put the cotter pin back, tighten the nut snug up against the end.
Braineack is offline  
Old 03-09-2007, 10:54 AM
  #7  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 29,309
Total Cats: 2,914
Default

Originally Posted by Mimime View Post
- I have to loosen the part(2) in order to tighten up part (1).
A: Loosen the nut (1) while holding the rod (0) with pliers to prevent it from turning.

B: Remove the locking clip from (2) and detatch (2) from the pin.

C: While holding the rod (0) with pliers, turn (2) clockwise onto it, to effectively shorten the assembly.

D: Re-attach (2) onto the pin, and re-install the clip.

E: While holding the rod (0) with pliers, re-tighten the nut (1).

It's critical that the rod is not allowed to rotate or you risk tearing the diaphram inside the can.

You want to get the assembly to the point where there is no play in it, and it takes just a bit of stretching to get (2) back onto the pin. One-half turn past touchdown, essentially. Tightening beyond this point will increase boost, which is better done by way of a boost controller.

If you have a handheld vacuum pump, attaching its output to the WG can nipple will make re-installing (2) onto the pin a bit easier, as you can pressurize the can to release tension from the rod.
Joe Perez is offline  
Old 03-09-2007, 11:55 AM
  #8  
Guest
 
Join Date: Mar 2006
Location: So Cal
Posts: 407
Total Cats: 0
Default

couldnt have said it better myself guys. This was soo frustrating when I did it the first time. Everyone said tighten it and I was tightening it the wrong way. So ya braineak is right, you need to have it soo tight where you need to pull it a little out for it to go into the designated place. Car will easily boost 9-10 psi with it tightened down.
krayzrac3r is offline  
Old 03-09-2007, 12:14 PM
  #9  
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Sep 2006
Location: Hong Kong
Posts: 523
Total Cats: 0
Default

When I check the tension, the rod was holding firmly on the pin. I need to put the rod away from the WG to get some slack. Is that Ideal?

I went on the dyno today, DYNO PACK. My Boost gauge had 0.3 bar, but when my car was hook on the dyno, it was recorded with only 0.1-0.2 bar. That's Less than 3 psi!

Making only 113 rwhp, running super rich... AFR 10-11 richer as it goes up in RPM.

Last edited by Mimime; 03-09-2007 at 12:56 PM.
Mimime is offline  
Old 03-09-2007, 12:19 PM
  #10  
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Sep 2006
Location: Hong Kong
Posts: 523
Total Cats: 0
Default

There are the DYNO results:

Last edited by Mimime; 08-31-2007 at 03:49 PM.
Mimime is offline  
Old 03-09-2007, 01:15 PM
  #11  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 29,309
Total Cats: 2,914
Default

Originally Posted by Mimime View Post
When I check the tension, the rod was holding firmly on the pin. I need to put the rod away from the WG to get some slack. Is that Ideal?
You don't want any slack on the rod. Ideally, it's just on the tight side of making firm contact.

With slack, the wastegate flapper is partially open all the time. This means you're loosing bost, and perhaps more importantly you've got hot exhaust gas passing through the wastegate constantly. That's what burns up exhaust valves, and I imagine it'd have a similar effect on a wastegate.
Joe Perez is offline  
Old 03-09-2007, 01:36 PM
  #12  
Senior Member
 
Join Date: Mar 2006
Location: Ireland
Posts: 534
Total Cats: 0
Default

Anyone recommend a good replacement for the Greddy one ? Only need 8 - 10 psi....yup, that's all !
Fergus is offline  
Old 03-09-2007, 01:43 PM
  #13  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,610
Total Cats: 2,314
Default

Easiest thing to do it give it some preload with the amount of tightness, and then use a Manual boost controller to raise it from there.
Braineack is offline  
Old 03-09-2007, 02:30 PM
  #14  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 29,309
Total Cats: 2,914
Default

Originally Posted by Fergus View Post
Only need 8 - 10 psi....yup, that's all !
Famous last words.
Joe Perez is offline  
Old 03-09-2007, 03:47 PM
  #15  
FHS
Senior Member
iTrader: (2)
 
Join Date: Oct 2004
Location: Los Angeles, Ca.
Posts: 502
Total Cats: 0
Default

When I was running 11 psi, I had to install a helper spring to keep the wastegate shut. Wasn't a complete fix, but it made a huge difference.

Pics here:

http://www.cardomain.com/ride/590477/2
FHS is offline  
Old 03-09-2007, 04:12 PM
  #16  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,610
Total Cats: 2,314
Default

helper spring is a must for a greddy kit trying to maintain a steady pressure above 7psi to redline.
Braineack is offline  
Old 03-09-2007, 04:16 PM
  #17  
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,651
Total Cats: 111
Default

would an EBC controller running closed loop get rid of the droop?

That was my plan....
__________________
DIYAutoTune.com Tech Support
10AE-T|BEGi S4|MSPNP-Pro EMS|Enthuza Duals|6UL|Etc
Track Rat|2001|VVT|MS3-Pro EMS|Enthuza|Exocet in Progress

Originally Posted by concealer404 View Post
Buy an MSPNP Pro, you'll feel better.
Ben is offline  
Old 03-09-2007, 04:26 PM
  #18  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,610
Total Cats: 2,314
Default

maybe, since it's run off a map sensor it can regulate it better. the problem is the wastegate spring is weak, so it will boost high, then gradually drop from 16psi to like 9psi. the helper spring helps maintain a flat 16psi to redline, or very close to.
Braineack is offline  
Old 03-09-2007, 07:32 PM
  #19  
Junior Member
iTrader: (1)
 
Join Date: Oct 2004
Location: Haarlem ,the Netherlands
Posts: 453
Total Cats: 0
Default

Why is that??? my greddy set boost to 15 psi and drops back to 12.(stock dp,fm manual boost controller)
Do we need a larger wastegate can?? btw without boostcontroller it's @ a standart 6psi... Never messed with tightning the wastegate...
greddymx5 is offline  
Old 03-09-2007, 09:40 PM
  #20  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,610
Total Cats: 2,314
Default

the can is just weak, throw a helper spring on it and it should hold 15psi better.
Braineack is offline  

Thread Tools
Search this Thread
Quick Reply: Tighten Greddy Wastegate?


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.