Jim bailey - 928 International

After 44 posts and 934 views I think we can safely conclude that the Kemp tool works very well indeed ! And still only $59 in our store !

H2

Jim, that's very true, but I'm not sure there is consensues on the issue of whether 32V cars have a reading "higher in the Kempf tool window" than the 16V car has. But since it works in both settings, maybe it's a non-issue... unless you're **** like I am...

H2

FlyingDog

In reference to 16V vs 32V readings...
"They're both in the window." - Jay Kempf.

another notable quote (paraphrased of course)...
"I don't understand the timing belt warning. It doesn't turn on until, like, 1 on the Porsche tool. What's the point warning you that your engine is dead? It's dead. You should know that."

blown 87

Does anybody else think the correct timing belt tension on a 928 is a lot tighter than just about any other belt motor?

Man it sure feels tight, but the 944's feel very tight to me also.

A Volvo and many others are very lose compared to the Porsche's.

Greg Nettles

Gary Knox

Harvey, et al,
Yes - the 5.2 9021 gauge reading compares to ~85-90% of the open window in the Kempf gauge (toward the tight side).

Gary Knox

Vilhuer

It turns on around 4 based on one S4 experiment. 1 would mean small coil spring is dead.

ew928

My tension light was recently tested as lighting around 2. Pretty low. 88 S4 motor.
I've triggered the light on belt flutters. As in higher rpm or drop throttle triggers the light. But on restart, the tension light stayed off.
If the tension light is constantly on, then I'm not sure how long the belt will keep cams and crank in proper adjustment.

Sailmed

I think it's a GREAT tool! I don't know about the tight side or not - and I consistently hit the red line. Sure miss my rev limiter with the Euro
I use it on 16V and 32V engines. Now if we can just get Jay off the slopes to make an instant alignment laser.......

worf928

I had a long conversation with Earl a couple of weeks ago about the Kempf gauge on 32v motors. Earl confirmed that his testing of the 9201 vs. the Kempf gauge showed that the Kempf gauge needs to be at the top of the window to get into the 5.0 to 5.3 range of the 9201 tool.

However, during our conversation, Earl realized that he had not tested lower settings of the Kempf tool vs. the 9201 tool. So, Earl didn't have data that would tell us the 9201 tension at say the middle or bottom of the Kempf window.

I for one would love to know the 9201 tension for the bottom, middle, and top of the window. Even better would be bottom, 1/3, 2/3, and top.

I did watch the ebay auction for the 9201 that was up a few weeks ago. IIRC it went for almost $500. Ouch!

Vilhuer

See message #32 for some data.

https://rennlist.com/forums/928-forum/127171-928-tool-by-kempf.html#post1218779

H2

(photos attached)
Dave,

I tested at the middle of the Kempf window and it was about a 3.0 reading if I remember right. At this setting (before I bought the 9201 tool), I would get the Check Tbelt Tension light when I goosed the car hard or on speed shifts. On cars whose Tbelt tensioner may be a bit different, I suspect the light might not activate as easily. At any rate, general practice seems to verify that a center-of-window setting works OK. I just like to be more precise. Various people I've checked with who have tested against the 9201 have the same experience. However, as mentioned, it must not be enough difference to justify two different Kempf products.

After this, Jay and I communicated and he sent me a new Kempf tool to check. It was the same. Jay is a great guy and his tool is one of the best things that a 928 owner can have. I think it's a must-have.

The problem with using the 9201 for comparison tests is that, if one is not practiced, consistent, and good with the 9201, the readings will be all over the place. Consistent and more easily readings are possible with the Kempf.

I spent more than 4 hours playing around with the 9201 and Kempf to verify the best setting for my car with the gauges. My arm about fell off from turning the engine two revolutions between each test.

I also bought one of the very scarce original Porsche 9131 tools (the one on which the Kempf tool is designed) and compared it with both the Kempf and the 9201 tools and it verifies the above.

Harvey

F451

Earl G and I did the same thing with my Kempf tool on my S4 right before I drove it home across country (just about 1 yr ago). We didn't go for 4 hrs, but we did a LOT of back and forth testing. And my arm just about fell off too.

Earl was good enough to get under there and do some cranking too so I could practice with the Kempf tool.

We found it was very consistent when compared to the 9201 tool.

And my Kempf tool also indicated at the high end of the window when it was dialed in at 5.2 or so. I marked mine with a Sharpie line, but I like the idea of the filed notch, and the white background with black line idea too.

ps: did I already post something like this in this thread? I'm too lazy to go back and check. Oh well...