[GSXfs600]

Have you read my comparison from a long time ago comparing the Motion Pro and the Morgan? I asked the same question.

Tmod

I like my old Motion Pro with the glass tubes. Has been working really well for about 23 years.

[hardlydangerous]

Hardly can correct me if I'm wrong here:

I think the only sych tool that you can actually calibrate is the new Motion Pro tool.
I think by calibrate he might have meant check each stick against a the same vacuum source to ensure they read the same. Adjustment isn't possible but noting the delta is.
Considering that the exercise of synching has little to do with actual vacuum levels but consistency I would have to agree that making sure you have that consistency is very important..

exactly

I tested my merc sticks and they are off slightly and not adjustable as they use a single reservior.

I use the motion pro because its so easy to read, adjustable so it can be calibrated, does not jump around like the merc sticks and safe to use if fluid did happen to get sucked into the engine.

i tested the analog guages with a single manifild to all 4 and they were all off. 1 was way off. And they were not adjustable. That was a waist of $600. the shop i was working for at the time replaced it with a digital set, I stuck with the old yellow motion pro unil I got the new merc free unit

like I said I would be very interested to hook up a carbtube to a manifiold and test the calibration just for ****s and giggles. who knows maybe they are that good.. but with one flawed unit just on this board alone kinda makes me wonder.

[Tmod]

exactly

I tested my merc sticks and they are off slightly and not adjustable as they use a single reservior.

I use the motion pro because its so easy to read, adjustable so it can be calibrated, does not jump around like the merc sticks and safe to use if fluid did happen to get sucked into the engine.

i tested the analog guages with a single manifild to all 4 and they were all off. 1 was way off. And they were not adjustable. That was a waist of $600. the shop i was working for at the time replaced it with a digital set, I stuck with the old yellow motion pro unil I got the new merc free unit

like I said I would be very interested to hook up a carbtube to a manifiold and test the calibration just for ****s and giggles. who knows maybe they are that good.. but with one flawed unit just on this board alone kinda makes me wonder.

I did test it with a common ported manifold and that is how I came up with one of them were out of tolerance.

Tmod

[Black_peter]

Hardly.
That was what kind of started this whole thing. After getting some technical data from Motion Pro I decided that it was the superior tool. Tmod was good enough to get some side by side comparisons.

I don't know where the data I posted is but for those interested the NEW Motion pro uses a proprietary glycerin mixture as the measuring fluid and a sort of balance volume to allow calibration and to make up for the lower density of the fluid.
While the fluid would only be available from Motion Pro at this time Hg is virtually impossible to get.

[RHarmon73]

a/f screws???

Can someone show me a picture or tell me where the air/fuel mixture screw is located? A picture would be best.

[arsenic]

http://katriders.com/vb/showthread.php?t=120385

Post #4