Date: Fri, 15 Jan 1999 21:30:08 -0800
From: Kenneth Barlow
Subject: [imps] Sport Cam
Hi People
I have just found a sport cam. I know the cam carrier has to have a bit taken off the tops for this cam to work, does any other moderfication need to be done?
I was told that the valves are either longer or shorter in the sport models, is this true? (I know the valves are bigger in sport heads)
All I am asking is, can you put the cam straight into a standard mk2 head (with the cam carrier mod)????
Kenneth
From: Impmann@aol.com
Date: Fri, 15 Jan 1999 04:51:37 EST
Subject: [imps] Re: Sport Cam
Hi Kenneth,
Simple answer yes.
You should fit uprated valve springs (either Terry heavy duty, or the Imp Sport double valve springs), but the difference in clearances should not be a problem.
I hope that helps,
Cheers,
Tim
From: Gary and Carol Henderson
Date: Fri, 15 Jan 1999 23:02:04 +-1300
Subject: [imps] Re: Sport Cam
Hi Kenneth, Tim
Don't the seal-covers & seals on the inlet stems have to disappear? (and hence the need for the head-drain pipe)
Cheers
GaryH
Date: Fri, 15 Jan 1999 09:48:27 -0000
From: Dave Edge
Subject: [imps] Re: Sport Cam
I have done it with a friends std mk2. We didn't worry overly about the oil seals - maybe it will catch up with us ?? The valve clearances just needed adjusting with new shims, we used some from a peugeot 309 (I think) We had the sports cam carrier as well.
Dave
From: Impmann@aol.com
Date: Fri, 15 Jan 1999 06:15:19 EST
Subject: [imps] Re: Sport Cam
Hi Gary,
>don't the seals have to go
No, if you use the standard valve springs, the oil seals can remain. I believe that you can use the seals with the Terry springs too. The double valve springs will foul.....
I've checked the Millington book, and it says that you can use standard valve springs with the sport cam, so my last reply was not quite accurate (sorry- my excuse is, I've got concussion following an accident so the world is spinning gently at the mo!!).
Cheers,
Tim
Date: Sat, 16 Jan 1999 13:33:07 +1300
From: bfoote
Subject: [imps] Re: Sport Cam
Tim-
When I rebuilt my Sport head I chose to retain the valve stem seals. The shroud holds the seal to the top of the valve guide. With double valve springs the shroud will foul the inner spring, so if you want to keep the seals you will need to leave out the inner springs. I am quite happy with single springs as I do not drive hard enough to warrant the others. A Sport engine without seals will smoke at the exhaust even though the oil return pipe to the sump is there to reduce the large volume of oil always present in the cam cover.
Hope this helps.
Brian Foote, New Zealand
From: Impmann@aol.com
Date: Sat, 16 Jan 1999 04:34:33 EST
Subject: [imps] Re: Sport Cam
Hi Guys,
Re this oil seal business......
There must be another type of seal that could be fitted when the double springs are used, such as the little top hats used in the A series? Any ideas?
Although I agree that a Sport uses a bit more oil than a standard car, they don't smoke much unless something is worn out.
Cheers,
Tim
From: Nickcleak@aol.com
Date: Sat, 16 Jan 1999 05:01:52 EST
Subject: [imps] Re: Sport Cam
Yes , those M**I seals !
Ian Carter fitted some AND double valve springs , i think that is a major contribution to my 930 using no oil !
The top of the valve guide needs a minor machining job to fit them ...
Nick
Date: Sun, 17 Jan 1999 20:38:31 +0000
From: Andrew W. MacFadyen
Subject: [imps] Re: Sport Cam
Any Imps I ditched the seals on never smoked or burnrd oil even without an oil drain.
Andy M