Installing adjustable camgear...

[peter møller]

Any thoughts on this. Can they be installed without any hazzle, i´m kinda conserned that the timing may be off too much. But i was hoping to be able to install them when doing the timingbelt replacement, without being able to have them fine tuned any day soon.

[JonT]

Hi Peter, i would expect that is you set them to 0, centrally or how ever they are marked, then they would be the same as stock.

[BenR]

Vernier pulleys, eventhough they have a 'zero' marking, rarely actually time in at the same stock timing figures.

If you are not going to at least check the timing on the engine when installing them, then i wouldnt bother.

The easiest method is to measure lift at TDC.

[peter møller]

Thanks all....you just said what i thought, so i´m guessing i´m not all wrong then.

[alimonos]

BenR Wrote:The easiest method is to measure lift at TDC.

Can u be more specific Benr???

[BenR]

Most people time in cams to the peak angle method, where you measure maximum lift at say, 110 degrees ATDC.

This method is flawed and inaccurate in my opnion as you have to take the average of both sides of the cam nose.

The method i use is to measure the lift at TDC. Set the engine to TDC, and set the intake and exhaust cams to the value they should be reading at TDC. This is more accurate because there is no space for error as you are measuring the flank of the cam lobe. The only thing you have to make sure of is that you are at the true TDC.

Use a DTI to measure lift on the bucket, and make sure you are measuring at the same included angle of the valve so you dont induce a lift ratio.

When i time in a cam i ignore the marking on the pulleys, they mean nothing, i only reply on the lift figures.

[peter møller]

BenR Wrote:Most people time in cams to the peak angle method, where you measure maximum lift at say, 110 degrees ATDC.

This method is flawed and inaccurate in my opnion as you have to take the average of both sides of the cam nose.

The method i use is to measure the lift at TDC. Set the engine to TDC, and set the intake and exhaust cams to the value they should be reading at TDC. This is more accurate because there is no space for error as you are measuring the flank of the cam lobe. The only thing you have to make sure of is that you are at the true TDC.

Use a DTI to measure lift on the bucket, and make sure you are measuring at the same included angle of the valve so you dont induce a lift ratio.

When i time in a cam i ignore the marking on the pulleys, they mean nothing, i only reply on the lift figures.

I think i´ll leave the actual cam timing to a pro shop with a dyno. I was just curious to hear if i could go all wrong on timing and lift by installing at Zero degree setting on the camgear, and then adjusting the timing afterwards.
But very interesting reading there BenR....all new stuff to me.

[BenR]

in that case you can time into zero then..........then get them setup after by someone who can...no problems!