Too much cam noise?
Discussion
Luckyone said:
ukkid35 said:
Great news!
Hope to see you and the car at a PH or TVR meet one day soon.
Thanks, we're booked in for the TVRCC 50th bash at Millbrook, I was hoping it would be running by then! Hope to see you and the car at a PH or TVR meet one day soon.
Are you (or any one else) going?
Jhonno said:
Tanguero said:
I am down for Millbrook - looking forward to seeing what the 4.7 will do!
How is your 4.7 doing? Have you managed to address the numbers "issue" yet?
Tanguero said:
I am down for Millbrook - looking forward to seeing what the 4.7 will do!
That will be interesting to see! There was something about testing your car up to 100mph, I hope that's not the speed limit or it could be a bit tame, unless it very twisty. Or kids are very excited to see our "racing car" on the racing track, it's been a garage ornament for just about all their lives so far & the older one on is 5 now!
I've been a bit distracted my other half's nice cars again:
Still that's gone now & not really missed all that much, funny how you can have a fast car that's not fun to drive!
So back to the Cerb, I'm glad to say it's still sounds lovely with no more nasty noises
The ECU is playing tricks now but that's for a different thread.
If you haven't read though the rest of the this old thread, lets just say I've got lots of AJP8 cams!
In the end I got two new chill cast cams, but when I found they were the same as the old cams I had in it to start with (as far as profile went) I just put my good old cam back in with the other new one. Some time later rang up to say I wanted to send the other new one back, the Cerb was back together & running well by this point, my supplier then told me that although the profile of the lobes was the same they had phasing tweaked on the new chill cast cams so I had miss matched cams after all. But he said if it was running ok I should just forget about it & send the cam back.
I didn't really like the idea of it not being right after spending so much time on it, but couldn't face stripping it down again. So as it was running I just left it.
Then recently it occurred to me I had the ideal checking took doing noting tucked away in the work shop I'm slowly building:
It's not in use yet so don't diss me for the state of it but please do point out any flaws in my logic for checking the phasing of the cams.
I had first checked my old duff cam (no pics of that being checked but it was the same way) I marked the pulley wheel of the lathe where the DTI showed the cam lobe was at its peak & the body of lathe at the same point. Then I checked the other lobe for that cylinder & marked the pulley where it lined up with my mark on the lathe body. To be sure I lined up my marks again & rotated the cam in the chuck so it was at peak for a different cylinder, then rotated it all to check the other mark & they matched perfectly.
So then I swapped to the new chill cast cam (the pics). This time I made a new mark on the body of the lathe when the lobe came to the peak, I then rotated it all so the other lobe was at its peak for the same cylinder, the second mark I'd made on the pulley wheel for the other cam lined up perfectly with the new mark I'd made for this cam.
So the marks on the lathes pulley wheel show the exact distance between the lobes for one cylinder & they match exactly for both my old cam & the new chill cast
So if the size of the lobes is exactly the same, the lobe shape is exactly the same & the phasing for one cylinder is exactly the same, as far a the engine can see they are the same right?
Still that's gone now & not really missed all that much, funny how you can have a fast car that's not fun to drive!
So back to the Cerb, I'm glad to say it's still sounds lovely with no more nasty noises
The ECU is playing tricks now but that's for a different thread.
If you haven't read though the rest of the this old thread, lets just say I've got lots of AJP8 cams!
In the end I got two new chill cast cams, but when I found they were the same as the old cams I had in it to start with (as far as profile went) I just put my good old cam back in with the other new one. Some time later rang up to say I wanted to send the other new one back, the Cerb was back together & running well by this point, my supplier then told me that although the profile of the lobes was the same they had phasing tweaked on the new chill cast cams so I had miss matched cams after all. But he said if it was running ok I should just forget about it & send the cam back.
I didn't really like the idea of it not being right after spending so much time on it, but couldn't face stripping it down again. So as it was running I just left it.
Then recently it occurred to me I had the ideal checking took doing noting tucked away in the work shop I'm slowly building:
It's not in use yet so don't diss me for the state of it but please do point out any flaws in my logic for checking the phasing of the cams.
I had first checked my old duff cam (no pics of that being checked but it was the same way) I marked the pulley wheel of the lathe where the DTI showed the cam lobe was at its peak & the body of lathe at the same point. Then I checked the other lobe for that cylinder & marked the pulley where it lined up with my mark on the lathe body. To be sure I lined up my marks again & rotated the cam in the chuck so it was at peak for a different cylinder, then rotated it all to check the other mark & they matched perfectly.
So then I swapped to the new chill cast cam (the pics). This time I made a new mark on the body of the lathe when the lobe came to the peak, I then rotated it all so the other lobe was at its peak for the same cylinder, the second mark I'd made on the pulley wheel for the other cam lined up perfectly with the new mark I'd made for this cam.
So the marks on the lathes pulley wheel show the exact distance between the lobes for one cylinder & they match exactly for both my old cam & the new chill cast
So if the size of the lobes is exactly the same, the lobe shape is exactly the same & the phasing for one cylinder is exactly the same, as far a the engine can see they are the same right?
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