Print Page - How Much should an Extenal Wastegate Open?

Title: How Much should an Extenal Wastegate Open?
Post by: antnicuk on March 21, 2006, 08:53:17 PM

I changed the pipe going to my wastegate to a bigger one and it made no difference, i am still having massive boost creep.

I have examined the wastegate and plumbed it into a compressor ( with a bleed valve) and the piston only goes up about 1/2 an inch and could still go up another half inch but doesnt no matter how much air i stick in it. When i put 30 psi in to it most of it bleeds off down the shaft and it only holds 9 psi with the piston only half way up.

I can push the piston up with my hands so i know it goes up all the way just not by air pressure.

Any ideas or does anyone have an HKS 50 mm wastegate knocking around that i could try to see if it makes any difference.

I\'m getting very frustrated now :Hammer :Hammer :Hammer

Title: How Much should an Extenal Wastegate Open?
Post by: Mr J.T on March 21, 2006, 08:59:29 PM

i might be able to help u, see wat i got in the garage pm me about it if i aint got back to u tomorrow

Title: How Much should an Extenal Wastegate Open?
Post by: antnicuk on March 21, 2006, 09:04:09 PM

will do, many thanks

Title: How Much should an Extenal Wastegate Open?
Post by: memski on March 21, 2006, 09:19:52 PM

I\'ve got a HKS racing wastegate you can try (which I assume is a 50mm iirc) the only problem is the spring is a 1.3bar one. You\'re welcome to give it a go with your spring if you like? Have you checked the diaphragm on your wastegate?

Title: How Much should an Extenal Wastegate Open?
Post by: antnicuk on March 21, 2006, 10:06:40 PM

Hi,

i have checked the diaphram and it seems fine.

That would be great, where abouts are you in kent, i could collect to make life easier , i should only need it for a few days, if it works and you are looking to sell it i may be interested.
Is it an original HKS one? Mine is an SS autochrome copy.

regards
Tony

Title: How Much should an Extenal Wastegate Open?
Post by: memski on March 22, 2006, 06:21:43 PM

It\'s a genuine HKS wg I\'ll be using until my car\'s ready (soon hopefully), so won\'t be selling. If you can transfer your spring, or use mine if you run over 1.3bar ;)

Pm and we\'ll sort something out.

Title: How Much should an Extenal Wastegate Open?
Post by: antnicuk on March 22, 2006, 08:47:50 PM

Nemski, pm sent

Title: How Much should an Extenal Wastegate Open?
Post by: Gord.R on March 22, 2006, 08:53:19 PM

HI Mate

Have had the wastegate apart and checked both the spring and the diaphram..even the most minute hole in the diaphram could affect it...it seems to be a common thing on the greddy wastegates...our supra had a serious boost problem turned out to be a split diaphram...

If ya still having probs...i have a hks 50mm w.g i bought for the supra...i can send that down for you to try if required...

Cheers

Gord

Title: How Much should an Extenal Wastegate Open?
Post by: Gord.R on March 22, 2006, 08:54:51 PM

Btw... i would sell it ...dont want much as its not much use to me now...

Title: How Much should an Extenal Wastegate Open?
Post by: antnicuk on March 22, 2006, 08:58:16 PM

Hi Gord
could you email at antnicuk@ntlworld.com
cheers
tony

Title: How Much should an Extenal Wastegate Open?
Post by: Gord.R on March 22, 2006, 09:06:21 PM

Sent :Thumbsup!

Cheers

Gord :cheers

Mazda Rotary Club

General => General Technical => Topic started by: antnicuk on March 21, 2006, 08:53:17 PM