Vernier pulley set up
Discussion
I'm finished with my engine build and need my vernier pulleys set up. Can anyone suggest a good reliable company to optimise the set up of them please? I don't mind travelling a bit, I'm near Portsmouth. I just want a company that know exactly what they are doing and not just guessing, and there to take your money no matter what. It's a high spec cosworth engine, although I wouldn't have thought it would have to be done by a cosworth specialist. Surely any high performance tuner could set the verniers up properly. Any help would be much appreciated.
Thanks
Vincent
Thanks
Vincent
Edited by cossievin on Monday 9th August 23:04
He'll suggest Mark @ MAD. Mark knows his stuff and is one of the best. I tried him, he didn't seem too interested in doing it. Despite me wanting other work doing. I think maybe because he didn't build he didn't want to set it up. Otherwise he would've been my first choice. He's only an hour or so away also.
I did mine myself and found it quite easy. First attempt took ages as I was triple checking, but since then its second nature now for any engine.
You'll need a dti gauge, timing wheel and a bit of time. Basically you find TDC, if no mark on the crank pulley you can work it out using the gauge and rod down the spark plug hole, once found ... reset your timing wheel to 0 deg.
Once that is done work out your dwell length on the cam, find centre and then make sure crank is at correct degree for full lift on the cam ... repeat for second cam. Full lift degree normally comes with the cam's paperwork.
I can send you a full step by step instruction if required, PM me.
You'll need a dti gauge, timing wheel and a bit of time. Basically you find TDC, if no mark on the crank pulley you can work it out using the gauge and rod down the spark plug hole, once found ... reset your timing wheel to 0 deg.
Once that is done work out your dwell length on the cam, find centre and then make sure crank is at correct degree for full lift on the cam ... repeat for second cam. Full lift degree normally comes with the cam's paperwork.
I can send you a full step by step instruction if required, PM me.
nlldavies said:
I did mine myself and found it quite easy. First attempt took ages as I was triple checking, but since then its second nature now for any engine.
You'll need a dti gauge, timing wheel and a bit of time. Basically you find TDC, if no mark on the crank pulley you can work it out using the gauge and rod down the spark plug hole, once found ... reset your timing wheel to 0 deg.
Once that is done work out your dwell length on the cam, find centre and then make sure crank is at correct degree for full lift on the cam ... repeat for second cam. Full lift degree normally comes with the cam's paperwork.
I can send you a full step by step instruction if required, PM me.
Easy ?You'll need a dti gauge, timing wheel and a bit of time. Basically you find TDC, if no mark on the crank pulley you can work it out using the gauge and rod down the spark plug hole, once found ... reset your timing wheel to 0 deg.
Once that is done work out your dwell length on the cam, find centre and then make sure crank is at correct degree for full lift on the cam ... repeat for second cam. Full lift degree normally comes with the cam's paperwork.
I can send you a full step by step instruction if required, PM me.
So how did you determine what cam position settings made the best power ?
A dti gauge, timing wheel etc will never tell you that. The only way is on a dyno.
As others have said, give Mark Shead a shout, or perhaps Karl Norris of Norris Motorsport.
Julian Godfrey is another option, or perhaps Mountune.
stevieturbo said:
nlldavies said:
I did mine myself and found it quite easy. First attempt took ages as I was triple checking, but since then its second nature now for any engine.
You'll need a dti gauge, timing wheel and a bit of time. Basically you find TDC, if no mark on the crank pulley you can work it out using the gauge and rod down the spark plug hole, once found ... reset your timing wheel to 0 deg.
Once that is done work out your dwell length on the cam, find centre and then make sure crank is at correct degree for full lift on the cam ... repeat for second cam. Full lift degree normally comes with the cam's paperwork.
I can send you a full step by step instruction if required, PM me.
Easy ?You'll need a dti gauge, timing wheel and a bit of time. Basically you find TDC, if no mark on the crank pulley you can work it out using the gauge and rod down the spark plug hole, once found ... reset your timing wheel to 0 deg.
Once that is done work out your dwell length on the cam, find centre and then make sure crank is at correct degree for full lift on the cam ... repeat for second cam. Full lift degree normally comes with the cam's paperwork.
I can send you a full step by step instruction if required, PM me.
So how did you determine what cam position settings made the best power ?
A dti gauge, timing wheel etc will never tell you that. The only way is on a dyno.
As others have said, give Mark Shead a shout, or perhaps Karl Norris of Norris Motorsport.
Julian Godfrey is another option, or perhaps Mountune.
All cams provide maximum power at full valve lift. In my case it was 102deg for the cams in my cosworth. Using the summary above I then set the engine up with this figure.
This might explain a bit better http://www.kentcams.com/info/technical.html. See "Cam Timing".
However, I do agree that some engine builders will tinker with the cam timing to squeeze as much as possible out of the cams perfomance. The exhaust cam on mine was adjusted to increase scavenging, but the benefits were minimal and not worth the agro of valve clipping.
Nige
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