Torque curve..

[mark030358]

Hi there,
Does anyone have a torque curve for the sprint cam shaft? I have found a QED 420 curve in the archives just want to compare the difference... unless anyone can tell me...

cheers
Mark

[bcmc33]

This is what I have in my archive.

QED worked head with std Sprint cams.xls

(23.5 KiB) Downloaded 452 times

Clearly QED did some work on the head to get these results. The normal Big Valve engine produces only about 110 bhp and 100 lbs ft of torque.

[mark030358]

Brian,
Thanks for that... much appreciated.

And from what I can see the 42 produces far more torque from say 3000rpm and is only a little less upto that point...

cheers
Mark

[bcmc33]

And from what I can see the 42 produces far more torque from say 3000rpm and is only a little less upto that point...

Mark,

This is an interesting comparison between Weber and Dellorto carb set-ups:

QED 420 cams on DCOE & DHLA carbs.xls

(24.5 KiB) Downloaded 443 times

I hope to start-up my QED 420 headed engine sometime next week. I plan to do a 500 mile set of running-in trips over the following week and then get it on the rolling road. I'm interested to see the results.
I am running Jenvey throttle bodies and not carbs so the comparrison will be even more interesting.

[mark030358]

Brian,
Interesting results. I have DHLA's on my Sprint. Any idea of what the jet sizes etc were?

cheers

Mark

[bcmc33]

Brian,
Interesting results. I have DHLA's on my Sprint. Any idea of what the jet sizes etc were?
Mark

A call to QED may be the best option.