Standard Pullies

[cammmy 1]

Hey Guys

 

Im starting the process of putting my BakerBM verniers on. They have two presets, #2 and #4.

 

My car has the #4 inlet pulley on it atm. Just wondering if I should look at setting the cam pulley to the #2 setting?

 

#3 pulley is used on the XU9J4Z inlet cam to advance the cam timing 3 degrees (crank)... Later XU9J4 engines were fitted with #4 pulley on the inlet. This advances the inlet cam by a further 5 degrees to a 106 degree centreline

 

Quoted from - http://www.taylor-eng.com/xu9j4/16v_overview.html

 

If I have read this correctly the #4 pulley is 8 degrees (crank) advanced compared to the #2 pulley. This would give less overlap and higher mid-range torque with a decrease in the high end? If I reverted the timing back to the #2 setting, the torque curve would be pushed up the range with losses in the lower/midrange areas?

 

Would the #2 setting be more suitable for a car that is going to be used for competition, rather than as a daily d?

Edited January 11, 2011 by cammmy

[rodionski 3 1 Cars]

You are correct.

[cammmy 1]

Sweet. Will set them both to #2 to start with once they are on.

[DRTDVL1345402287 0]

Cam - just don't make your car too peaky, remember the drive i took you on? i need more mid-upper range power to make the car go faster, i would work on getting a lower larger flatter peak power range than have a higher smaller peak power range, unless your on a track you will want more overall area under the curve.

[petert1345402284 0]

Be cautious! As soon as you move away from standard pullies you should be using a dial indicator to set up the cams.

 

[cammmy 1]

It's only a 4 degree difference so I can't imagine it would make a huge difference. If it's no good I can just change it back

 

Hey Peter, These are the pullies.

 

 

The timing hole is not present though so I will be using dial gauges for the initial setup, then using the presets to change between factory timings.

[welshpug 1,657]

timing hole is present, I can see it in the picture? and the text in the picture says so too

Edited January 13, 2011 by WELSHPUG

[cammmy 1]

They were removed from the ones we got as BakerBM thought we should be using dial gauges rather than relying on that hole. He reckons they are not accurate enough.