Thinking About A Cam
Joined: Feb 2008
Posts: 6,465
That's good to hear. I was planning on using 150lbs manly springs, 3/8th pushrods, and a double roller timing chain with a tensioner if I can reuse the old tensioner. I know it's not exactly necessary when he chain is new, but I'd like to have it for when the chain starts to stretch.
You can't reuse the stock tensioner either. Some people used to try way back in the day and it caused more problems than it solved. May be some aftermarket solution, but everyone ive seen run a double over the last 10+ years has been just installing it as is without.
Joined: Aug 2018
Posts: 68
From: S.Jersey
I probably should note, that comment is based on LS cams and the quality does vary by manufacturer. Not that 3800 cams are any different, i just don't know how common it is on this platform (likely because most just do the dot to dot).
Ultimately there's very little impact of it being a little off for the average joe unless its got ultra tight PTV or is an all out build.
If you're getting a Rollmaster keep in mind the chamfer issue. There is a known interference issue between the back of the sprocket not matching up to the US crank snout radius causing the crank sprocket not to seat all the way. It needs some light machining to correct to make sure the chain isn't riding at an angle and eating itself.
In terms of hammering the sprocket on, I wouldn't. You'll never see a pro engine shop beating on something with a hammer to make it fit. Its one thing to tap something into place to overcome a light drag but if its so extreme of an interference that you're literally hammering it like a nail, then its not right. Id try using either heat or cool (in moderation of course, not talking about getting it cherry red) depending which part you're applying it to to dimensionally change it slightly to allow it to go on.
My concern with legimtiate hammering is inducing stress or causing a dimensional change in the sprocket. Even if you never plan to remove it, the last thing you want is that sprocket coming apart or wearing at the chain. Just my .02
Ultimately there's very little impact of it being a little off for the average joe unless its got ultra tight PTV or is an all out build.
If you're getting a Rollmaster keep in mind the chamfer issue. There is a known interference issue between the back of the sprocket not matching up to the US crank snout radius causing the crank sprocket not to seat all the way. It needs some light machining to correct to make sure the chain isn't riding at an angle and eating itself.
In terms of hammering the sprocket on, I wouldn't. You'll never see a pro engine shop beating on something with a hammer to make it fit. Its one thing to tap something into place to overcome a light drag but if its so extreme of an interference that you're literally hammering it like a nail, then its not right. Id try using either heat or cool (in moderation of course, not talking about getting it cherry red) depending which part you're applying it to to dimensionally change it slightly to allow it to go on.
My concern with legimtiate hammering is inducing stress or causing a dimensional change in the sprocket. Even if you never plan to remove it, the last thing you want is that sprocket coming apart or wearing at the chain. Just my .02
Last edited by 2004DaleJr.SS; Sep 1, 2020 at 04:41 PM.
Joined: Feb 2008
Posts: 6,465
Surprises me that they dont at least mention it. No doubt plenty of people run it as is with zero issues, but clearly some people have issues so youd think they'd at least note to take a look when installing.
Joined: Aug 2018
Posts: 68
From: S.Jersey
any valve float. I'm nervous about running a double chain. My car will never see the track. Just looking for a strong street car.
Last edited by 2004DaleJr.SS; Sep 2, 2020 at 01:44 PM.
Joined: Aug 2018
Posts: 68
From: S.Jersey
Bumpin check this out. Here is a quote from ZZP about the Rollmaster timing chain.
"Hmm, interesting. Its not an issue we have honestly. We have a customer who put over 30k on a turbo build recently come in for small upgrade. He has had his roll master since 2009. And it still makes the same power. it sounds like people are making a big deal out of nothing.
But if its the route you want to dog, I do understand. It would just suck to have you do all this work and then get beat by a car with a turbo and a cam."
Makes me wonder.
"Hmm, interesting. Its not an issue we have honestly. We have a customer who put over 30k on a turbo build recently come in for small upgrade. He has had his roll master since 2009. And it still makes the same power. it sounds like people are making a big deal out of nothing.
But if its the route you want to dog, I do understand. It would just suck to have you do all this work and then get beat by a car with a turbo and a cam."Makes me wonder.
Last edited by 2004DaleJr.SS; Sep 2, 2020 at 03:09 PM.
Joined: Feb 2008
Posts: 6,465
Bumpin check this out. Here is a quote from ZZP about the Rollmaster timing chain.
"Hmm, interesting. Its not an issue we have honestly. We have a customer who put over 30k on a turbo build recently come in for small upgrade. He has had his roll master since 2009. And it still makes the same power. it sounds like people are making a big deal out of nothing. But if its the route you want to dog, I do understand. It would just suck to have you do all this work and then get beat by a car with a turbo and a cam."
Makes me wonder.
"Hmm, interesting. Its not an issue we have honestly. We have a customer who put over 30k on a turbo build recently come in for small upgrade. He has had his roll master since 2009. And it still makes the same power. it sounds like people are making a big deal out of nothing.
But if its the route you want to dog, I do understand. It would just suck to have you do all this work and then get beat by a car with a turbo and a cam."Makes me wonder.
No doubt there are plenty of people who have just slapped them on and had no issues as clearly there is variability there with tolerance. So it's odd for them to give an example of a single person with relatively low mileage, but high age (not like it wears just sitting there). Also odd that they mention it makes the same power - its not like timing chain wear would cause reduced power over time (if it was indeed wearing on that one specific car).
Bottom line though, I think there are 2 takeaways:
-You can still run some aftermarket cams with a single chain. Even a mild cam turbo 3800 can make good power, so unless it's a hardcore track car, I wouldnt be super worried about just running a fairly mild cam.
-Its a fairly easy thing to inspect for if you really want a bigger cam and have to run a double roller. Either the sprocket seats ok and the chain runs parallel, or its not and needs some light machining.
Thread
Thread Starter
Forum
Replies
Last Post
2004DaleJr.SS
Engine/Transmission/Performance Adders
2
Dec 20, 2018 03:17 AM