435 cam timing?
Discussion
Bobby Shaftoe said:
Yeah the Kent 214 is a 111 Lobe Seperation Angle as well as being installed straight up @ 111 degrees intake centerline angle.
Seems a bit off of them not to give you the information on the phone!
116 or 118 Lobe seperation would seem to be overly wide for a RV8 108 to 112 seems to be the sweet spot depending on capacity.
As a rule of thumb you'd want to time the cam up anywhere from straight up to 4 degrees advanced, so on a 112 LSA you'd install on a 108 to 112 intake LCA.
Who actually grinds the cam? If its kent or piper they've both been very helpful to me over the phone in the past, might be worth a call.
Cool, just come off the phone from 'Kent Cams' [very helpful] and he seems to think they should be timed at 116 degrees otherwise they can lose brake servo.Seems a bit off of them not to give you the information on the phone!
116 or 118 Lobe seperation would seem to be overly wide for a RV8 108 to 112 seems to be the sweet spot depending on capacity.
As a rule of thumb you'd want to time the cam up anywhere from straight up to 4 degrees advanced, so on a 112 LSA you'd install on a 108 to 112 intake LCA.
Who actually grinds the cam? If its kent or piper they've both been very helpful to me over the phone in the past, might be worth a call.
so even more confused
Never thought it would be so difficult to get basic information on a cam fitted as standard
carsy said:
You not putting in a new cam Mac ? on this re build.
Not exactly mate, I've had so much conflicting advice on cams that are completely at odds with each other. I took the TVR 435 out of the car after it had done only about 5k miles and is as new, I replaced it with a piper 285 of which I've ran since [nice enough pull from 3-5k revs]. Now After going around in many circles having taken in much advice which is wide varying come to the conclusion that the original 435 is suited to a turbo having a wide LCA [less overlap] and many conversions have been done with the 'standard' 435. Though some say the 435 is an aggressive cam, but from what I remember it was pretty much non-eventful and had no steps in performance throughout and seemed linear. Not skimping in any way, just going with what I 'think' is a known quantity. If I'd had a definitive answer on an alternative, I'd have gone with it and paid accordingly.macdeb on Wednesday 12th March 16:56[/footnote]
Edited by macdeb on Wednesday 12th March 19:41
Bobby Shaftoe said:
I wonder if the TVR435 is the same cam as the Kent Cams 885, in the current KC catalogue its described as a direct replacement for the OE TVR 5.0 camshaft. It's got lots intake and exhaust duration but a really wide LSA to reduce the overlap.
Exactly, that was line of thinking. Out of interest what is the dial in for that.Bobby Shaftoe said:
I wonder if the TVR435 is the same cam as the Kent Cams 885, in the current KC catalogue its described as a direct replacement for the OE TVR 5.0 camshaft. It's got lots intake and exhaust duration but a really wide LSA to reduce the overlap.
That sounds like the TVR885 cam to me...Bobby Shaftoe said:
I wonder if the TVR435 is the same cam as the Kent Cams 885, in the current KC catalogue its described as a direct replacement for the OE TVR 5.0 camshaft. It's got lots intake and exhaust duration but a really wide LSA to reduce the overlap.
That sounds like the TVR885 cam to me...ChilliWhizz said:
This is one seriously confusing thread.
Mac, buy another cam, one that has the instructions in the box FFS
Bloke, confusing? You wanna hear some of the conversations I've had. I have been asking which one since June last year! [other thread which I bumped and e mails unanswered] and wanted to buy the 'right' cam from someone, anyone, but for some reason the information isn't forthcoming and I aint begging, and my reasons for going with the 435 is it seems the only one used that I know of with similar conversions and what else do I have to go on? Mac, buy another cam, one that has the instructions in the box FFS
Seems I'll go it alone and see how I get on and any experiences I have, I will gladly pass on
[even if it means a cam change come winter].Edited by macdeb on Thursday 13th March 16:48
Edited by macdeb on Thursday 13th March 19:45
Bobby Shaftoe said:
Did he tell you what the Lobe Seperation angle of the Cam is? If it's been ground 116 degrees LSA, then installing at 116 would be 'straight up' in the Yank parlance. Up to 4 degrees advance, ie install anywhere from 112 to 116 degrees intake centerline, just don't install with any retard, ie a figure higher than 116.
Do you have the lift and duration figures for this cam?
I think half the problem is the terms LSA and LCA get used interchangeably, which adds to the confusion.
Mac thats pretty much there IMO Do you have the lift and duration figures for this cam?
I think half the problem is the terms LSA and LCA get used interchangeably, which adds to the confusion.
Sardonicus said:
Bobby Shaftoe said:
Did he tell you what the Lobe Seperation angle of the Cam is? If it's been ground 116 degrees LSA, then installing at 116 would be 'straight up' in the Yank parlance. Up to 4 degrees advance, ie install anywhere from 112 to 116 degrees intake centerline, just don't install with any retard, ie a figure higher than 116.
Do you have the lift and duration figures for this cam?
I think half the problem is the terms LSA and LCA get used interchangeably, which adds to the confusion.
Mac thats pretty much there IMO Do you have the lift and duration figures for this cam?
I think half the problem is the terms LSA and LCA get used interchangeably, which adds to the confusion.
that's where I'm at given everything so far. Thanks blokes for at least trying to help. much appreciated. Gassing Station | Chimaera | Top of Page | What's New | My Stuff