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Engine Specific Info and Questions => IDI Engine => Topic started by: dieselherb1 on May 08, 2012, 07:03:24 am

Title: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: dieselherb1 on May 08, 2012, 07:03:24 am

Put a GT15 from a 98 TDI spools real fast but 25psi almost instantly. Now blown HG will have to resurface head. How can I control boost on this thing? And if manual control,which one and from where? Thanks

Title: Re: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: nathan_b on May 08, 2012, 08:17:29 am

wastegates stuck shut, you need to free it up, and use a manual boost controller.

Title: Re: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: CRSMP5 on May 08, 2012, 10:18:28 am

on mine i used a air pressure regulator for say an air tool/paint gun in a garage/body shop.. run mine 18-21psi... less then that you feel it surge on my set up..

Title: Re: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: dieselherb1 on May 08, 2012, 02:02:16 pm

Where did you install the reg? The wastegate on the gt15 is vacumn. controlled how did you use a pressure reg.?

Title: Re: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: CRSMP5 on May 08, 2012, 07:26:05 pm

i think you better look at it again... its not vac.. its pressure.. yea the tdi used vac stuff to activate and all.. but it still uses pressure to open the wastegate.. using a "blow gun" give it a little pressure to see if it moves... or a hand vac pump to see if it moves.. mine moved via blow gun method..

now newer vnt is vac operated.. so think your confusing stuff..

Title: Re: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: R.O.R-2.0 on May 09, 2012, 11:24:06 am

As was mentioned, a VNT turbo is vacuum operated.. (GT15VNT)

but the straight up GT15, is wastegated, and pressure operated..

25psi is WAY TOO MUCH for a GT15.. lucky you didnt explode it..

Title: Re: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: nathan_b on May 09, 2012, 12:07:20 pm

Quote from: R.O.R-2.0 on May 09, 2012, 11:24:06 am

As was mentioned, a VNT turbo is vacuum operated.. (GT15VNT)

but the straight up GT15, is wastegated, and pressure operated..

25psi is WAY TOO MUCH for a GT15.. lucky you didnt explode it..

crsmp5 ran like 30psi on his k03 and it survived, I think

Title: Re: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: CRSMP5 on May 09, 2012, 01:30:37 pm

28 max was what i saw... have it set to 18-21 range...

Title: Re: GT15 Turbo on 1.6TD now blown HG How to control boost?
Post by: R.O.R-2.0 on May 09, 2012, 05:16:57 pm

Quote from: nathan_b on May 09, 2012, 12:07:20 pm

Quote from: R.O.R-2.0 on May 09, 2012, 11:24:06 am

As was mentioned, a VNT turbo is vacuum operated.. (GT15VNT)

but the straight up GT15, is wastegated, and pressure operated..

25psi is WAY TOO MUCH for a GT15.. lucky you didnt explode it..

crsmp5 ran like 30psi on his k03 and it survived, I think

25 sustained is still too much.. 18 is reasonable, but anything more, and the drive pressure goes off the charts, as demonstrated by the OPs blown head gasket..