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Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI Power Enhancements

TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old June 13th, 2018, 17:06   #16
Mike_04GolfTDI
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I just put some black INA lifters in my engine a few days ago and nothing weird happened.
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Old December 14th, 2019, 10:44   #17
Cjensan
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The video linked is my video.

The large spring inside the lifter, in addition to the 3 piece piston design results in a hydraulic lifter that runs a valve lash of around 0.014".
The diesel motors are too loud for you to hear much of a difference.
As mentioned in the video they were installed in a 1991 928GT with heavier valve springs (seat pressure around 90#). With them installed the idle was not consistent, and the car was not making the same power as before.
The car was also noticeably louder at idle and sounded like a solid lifter engine with the lash set too large.
Upon removing that large spring (not the small spring which keeps the check valve ball in place) the engine was back to being properly quiet and back to making full power.

The factory cam grinds have a ridge in them that is around 0.011" and you see numerous companies offering up a "true hydraulic grind" on the cams. The factory added this spring in an attempt to help reduce wear by having the hydraulic lifters maintain a valve lash like you would have in a solid profile grind. But the solid profile grinds use an entry ramp followed by a quietening ramp. The factory VW grind has something like an entry ramp, but no quietening ramp to follow it.

So if you are using a factory camshaft that has never been reground with a proper hydraulic grind, then use the lifter with the spring. If you are running a cam with a hydraulic grind you will see more life and likely an increase in power from removing the spring from the lifter.
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Old December 14th, 2019, 11:45   #18
Yourbuddysatin
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Reviving old threads is getting popular.
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Old December 15th, 2019, 04:57   #19
Markus L
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So what's wrong with bumping 1Ĺ year old thread with more detailed information?
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Old December 18th, 2019, 15:02   #20
PakProtector
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At some point, I will be doing a BEW cam. While this one has my attention, I think I am going to see if any other info comes to light to explain why this is such a threat.
cheers,
Douglas
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Old December 19th, 2019, 19:29   #21
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I took the spring out, engine is quiet, so meh! Lol.
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Old December 19th, 2019, 19:29   #22
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Quote:
Originally Posted by Markus L View Post
So what's wrong with bumping 1Ĺ year old thread with more detailed information?
Exactly.
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Old December 22nd, 2019, 15:38   #23
Blownvette
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Quote:
Originally Posted by turbovan+tdi View Post
Exactly.
Especially when the poster is a very well experienced cam installer. Wish he was on the east coast of the USA and I could have him install my stage 3 v10tdi cams. I know he got his when I got mine and canít wait to get them in!
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Old February 27th, 2020, 01:20   #24
toefuk
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Hi all,
I did head gasket job last saturday but things get wrong.
Head was rebuild (grinding/valve guides/etc.).
I checked timing twice after installation. It was fine. Than I disconnected IP (VP37) and start cranking to get oil in the system and in the lifters. After 10-15 seconds of crancking pistons starts to hit valves.
I checked timing again but it was OK.
Then I swaped to old lifters and pistons stop to hit the valves, so I connected the IP connector and engine starts ok.
What should happen?
Now I have power loss and white smoke during cold start. So I think that valve(s) are not sealing well now.
Hope that conrods are OK.
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Old February 27th, 2020, 03:28   #25
Yourbuddysatin
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Probably bent valves.
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