Shimming Wastegate

1988gte · 11-14-2005, 10:26 AM

my car would only hit 4 to 5 lbs so i shimmed it now goes over 8 (i think, needle above 8 lbs) its like a new car. i think it can hang with my mach

. oh not to highjack but isnt are cars stock boost around 8 lbs anyways? on that note any reason why i was only hitting 4lbs? sorry not highjacking thread. heres this website http://www.supras.nl/index.php?optio...d=43&Itemid=59

Bullz_EyE · 11-14-2005, 04:41 PM

No, you didn't jack the thread dude, this was an old thread I bumped, it's cool. That link you posted is pretty good info, it also suggests shimming is "safe". But it's articles like this that still make me question how safe it is. As for stock boost, it's 6psi. I've heard automatics, on average, are a little lower.

1988gte · 11-15-2005, 05:39 AM

my car is a five speed any suggestion on why?

Bullz_EyE · 11-15-2005, 05:46 AM

What kind of gauge are you using?

1988gte · 11-15-2005, 06:19 AM

stock guage

Bullz_EyE · 11-15-2005, 09:51 PM

It's possible that your stock gauge is inaccurate. It's also possible it could be a close representation of your actual boost? What breathing mods have you done?

As for the topic, no one else wants to chime in here?

joel w · 11-15-2005, 10:22 PM

personally i would recomend an aftermarket gauge, incase you ever blow a waistgate vac/boost reference line like i did.. I looked down and i was at about 20 psi... and stock gauge pegs at 8 so youd never know it if it ever happened to you.

and i like to adjust boost inside cab with moddified manual air regulator, but thats just how i roll... bleeder valves work pretty good too and way cheap...so will the washers just dont over do it...

ryemann32 · 11-16-2005, 03:09 AM

wow what a diffrence i thought i would shimm this turbo while i wait for my new stuff to get here,what a blast on my way home from work, only takes about 20 minutes to do to,i only put in 3 washers but they looked alittle bigger than normal so i only put in the 3, my stock gauge would bary when i laid into it would let loose even easier thanx for the thread was lots of fun

Luin Haden · 11-16-2005, 03:34 AM

The factory boost is 6.7

1988gte · 11-16-2005, 08:47 PM

Bullz_EyE everything is stock but the shims. Just had to try it out. What is a good aftermarket?

11-14-2005, 10:26 AM	#1
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	my car would only hit 4 to 5 lbs so i shimmed it now goes over 8 (i think, needle above 8 lbs) its like a new car. i think it can hang with my mach. oh not to highjack but isnt are cars stock boost around 8 lbs anyways? on that note any reason why i was only hitting 4lbs? sorry not highjacking thread. heres this website http://www.supras.nl/index.php?optio...d=43&Itemid=59 Last edited by 1988gte; 11-14-2005 at 10:30 AM.

11-16-2005, 03:09 AM	#8
ryemann32 3" Exhaust Join Date: Nov 2005 Location: surrey bc canada Posts: 102	i shimmed mine today wow what a diffrence i thought i would shimm this turbo while i wait for my new stuff to get here,what a blast on my way home from work, only takes about 20 minutes to do to,i only put in 3 washers but they looked alittle bigger than normal so i only put in the 3, my stock gauge would bary when i laid into it would let loose even easier thanx for the thread was lots of fun

11-16-2005, 03:34 AM	#9
Luin Haden Stock Join Date: Aug 2005 Location: Sparta, MO Posts: 22	The factory boost is 6.7 __________________ -Luin Haden Sparta, MO Owner of a 1990 Targa Top 5 speed Turbo Supra It isnt pretty now, but just wait.

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11-14-2005, 04:41 PM	#2
Bullz_EyE 3" Exhaust Join Date: Oct 2005 Location: San Diego, CA Posts: 238	No, you didn't jack the thread dude, this was an old thread I bumped, it's cool. That link you posted is pretty good info, it also suggests shimming is "safe". But it's articles like this that still make me question how safe it is. As for stock boost, it's 6psi. I've heard automatics, on average, are a little lower.

11-15-2005, 05:39 AM	#3
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	my car is a five speed any suggestion on why?

11-15-2005, 05:46 AM	#4
Bullz_EyE 3" Exhaust Join Date: Oct 2005 Location: San Diego, CA Posts: 238	What kind of gauge are you using?

11-15-2005, 06:19 AM	#5
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	stock guage

11-15-2005, 09:51 PM	#6
Bullz_EyE 3" Exhaust Join Date: Oct 2005 Location: San Diego, CA Posts: 238	It's possible that your stock gauge is inaccurate. It's also possible it could be a close representation of your actual boost? What breathing mods have you done? As for the topic, no one else wants to chime in here?

11-15-2005, 10:22 PM	#7
joel w Lexus & 550's Join Date: Aug 2005 Location: In the shadows Posts: 506	personally i would recomend an aftermarket gauge, incase you ever blow a waistgate vac/boost reference line like i did.. I looked down and i was at about 20 psi... and stock gauge pegs at 8 so youd never know it if it ever happened to you. and i like to adjust boost inside cab with moddified manual air regulator, but thats just how i roll... bleeder valves work pretty good too and way cheap...so will the washers just dont over do it...

11-16-2005, 08:47 PM	#10
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	Bullz_EyE everything is stock but the shims. Just had to try it out. What is a good aftermarket?