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+--- Thread: 617.952 turbo boost adjustment guidance (/showthread.php?tid=2219)
617.952 turbo boost adjustment guidance - Rocket88 - 02-03-2011
Can someone please guide me to step by step technically detailed instructions for cranking up the turbo boost??
Thanks in advance.
RE: 617.952 turbo boost adjustment guidance - larsalan - 02-03-2011
under the airbox you will find the wastegate.
![[Image: wastegate.jpg]](http://i88.photobucket.com/albums/k176/larsalan/wastegate.jpg)
open that housing by removing the 'tang' it's like 2 coils worth of a metal slinky jambed in the outside of that housing.
Not bad to get out but a b!tch to put it back in. Inside there will be a bolt with 2 nuts on it the outer nut retains the position of the inner one. So you need to separate the 2 as they will be jambed together. Tightening the inner nut will raise the amount of boost in the intake before it is wastegated.
then, lock the 2 nuts back together and put the tang back in. I believe they say one turn in like 1 psi. I have cranked mine up and now get either 10 or 10.5 psi on my gauge.
more here and here
http://www.benzworld.org/forums/w123-e-ce-d-cd-td/1259636-om617-ip-fuel-boost.html
http://www.dieselbombers.com/diesel-engine-conversions/62678-om617-chev-pickup-conversions.html
are you sure you need/want more boost?
RE: 617.952 turbo boost adjustment guidance - Rocket88 - 02-03-2011
(02-03-2011, 11:12 AM)larsalan under the airbox you will find the wastegate. [img]It's a legit question. At 62 yrs of age I can take all the thrills I can get.
are you sure you need/want more boost?
RE: 617.952 turbo boost adjustment guidance - garage - 02-03-2011
(02-03-2011, 11:21 AM)Rocket88(02-03-2011, 11:12 AM)larsalan under the airbox you will find the wastegate. [img]It's a legit question. At 62 yrs of age I can take all the thrills I can get.
are you sure you need/want more boost?
I think what larsalan was getting at is, if you feel you need to crank up the boost, you probably have already adjusted your IP for more fuel right?
RE: 617.952 turbo boost adjustment guidance - larsalan - 02-03-2011
Yes, I am getting at the fact that 11psi may not give more power than 8psi.
RE: 617.952 turbo boost adjustment guidance - ForcedInduction - 02-03-2011
(02-03-2011, 11:32 AM)larsalan Yes, I am getting at the fact that 11psi may not give more power than 8psi.
It will, 11psi is the factory spec and more boost is needed to get the same power if you live above sea level.
RE: 617.952 turbo boost adjustment guidance - Rocket88 - 02-04-2011
(02-03-2011, 11:12 AM)larsalan under the airbox you will find the wastegate.
Thank you!
I worded my inquiry as specific for turbo when I seek the whole picture so as to do it wisely.
I gather there may not be a simple 1, 2, 3, stepwise, plain language succinct recipe in print here for hot rodding the 617 turbo engine by cranking up the turbo boost and fuel input.
From browsing around it seems
- one monitors exhaust gas temp so you do not overdo it
- adjust ip for upping fuel input before turbo adjustment
- the balance that with boost increase
RE: 617.952 turbo boost adjustment guidance - winmutt - 02-06-2011
(02-03-2011, 11:21 AM)Rocket88QOTD(02-03-2011, 11:12 AM)larsalan under the airbox you will find the wastegate. [img]It's a legit question. At 62 yrs of age I can take all the thrills I can get.
are you sure you need/want more boost?
RE: 617.952 turbo boost adjustment guidance - winmutt - 02-06-2011
(02-04-2011, 09:03 AM)Rocket88(02-03-2011, 11:12 AM)larsalan under the airbox you will find the wastegate.
Thank you!
I worded my inquiry as specific for turbo when I seek the whole picture so as to do it wisely.
I gather there may not be a simple 1, 2, 3, stepwise, plain language succinct recipe in print here for hot rodding the 617 turbo engine by cranking up the turbo boost and fuel input.
From browsing around it seems
- one monitors exhaust gas temp so you do not overdo it
- adjust ip for upping fuel input before turbo adjustment
- the balance that with boost increase
Adjusting the pump is covered in the sticky. The turbo is only good till about 14psi. You should get a egt sensor but I dont think the stock pump can push enough fuel to "overdo it". What can happen is bad injection timing and that can "overdo it".