LS2 Pushrods

[bothur]

Looking for some advice here, I am just about to give the green light to one of the local shops to carry out a cam/spring upgarde on the VE Maloo. But a litte confused as one shop says to replace the pushrods and the other doesnt, is this necessay or not ? Also can anyone advise what the standard cam is in my VE LS2 Maloo ?

[boggers007]

Looking for some advice here, I am just about to give the green light to one of the local shops to carry out a cam/spring upgarde on the VE Maloo. But a litte confused as one shop says to replace the pushrods and the other doesnt, is this necessay or not ? Also can anyone advise what the standard cam is in my VE LS2 Maloo ?

Its absolutely necessary, wrong length pushrods means car runs like a pig and could cause damage depending on the size of the cam vs size of stock pushrods. My advice the shop that says no id stay away from.

[peter b]

It is recommended to change pushrods with the camshaft as an aftermarket cam may require a different length pushrod to get the correct lifter preload. Get it wrong and lifters will be noisey

[peter b]

Its absolutely necessary, wrong length pushrods means car runs like a pig and could cause damage depending on the size of the cam vs size of stock pushrods. My advice the shop that says no id stay away from.

In quite a few cases depending on size of camshaft standard pushrods are ok it isn't absolutely necessary if all you are doing is sliding a cam in and not shaving heads but I would highly recommend it. For an engine that doesnt have shaved heads realistically your only looking at a pushrod 25 to 50 thou shorter or longer depending on the cam of course

[bothur]

I am leaning towards the VCM 21 cam kit that includes pushrods, so I would assume that the pushrods in the kit are the correct ones, or should there be process of measurment to decide to correct pushrods only once the cam has been fitted ?

[peter b]

VCM have already worked out what length pushrod is needed buy the kit you wont look back

[bothur]

Thanks Guys, does anyone happen to know what the standard cam is in the LS2 VE Maloo ?

[peter b]

this has been covered before i believe do a search i cant remember the specs of hand

[The_Senator]

Its absolutely necessary, wrong length pushrods means car runs like a pig and could cause damage depending on the size of the cam vs size of stock pushrods. My advice the shop that says no id stay away from.

So one of Perths biggest and well known performance shops says that there is not need to change lifters - and it's all internet BS..

Another well known shop says it's up to the individual, it's good insurance and if you can stretch the budget then do it - but it's not really necessary..

Others say "a must"... and "you have to factor that in when going for a cam"

So - in this whole world of internet - what really is the go? Is it hearsay that you MUST change them.. Internet myth turned into fact?

Who would you beleive.. Shops that turn out 30+ cam installs a month - or internet hearsay?

I'm not saying anyone is right or wrong - just pointing out how there are so many opinions on what you MUST and SHOULD do..

[boggers007]

So one of Perths biggest and well known performance shops says that there is not need to change lifters - and it's all internet BS..

Another well known shop says it's up to the individual, it's good insurance and if you can stretch the budget then do it - but it's not really necessary..

Others say "a must"... and "you have to factor that in when going for a cam"

So - in this whole world of internet - what really is the go? Is it hearsay that you MUST change them.. Internet myth turned into fact?

Who would you beleive.. Shops that turn out 30+ cam installs a month - or internet hearsay?

I'm not saying anyone is right or wrong - just pointing out how there are so many opinions on what you MUST and SHOULD do..

I think it just comes down to insurance, lifters, pushrods, springs etc all easy to change when doing cam's etc but much more damaging later on if you dont and stock stuff breaks. I know shops may do heaps and know there stuff but u could be the poor bastard that has a lifter collapse or watever.

[peter b]

The need for differing length pushrod is determined by the camshaft and if the heads have been shaved. In a lot of cases where it is just a cam swap it isn't a necessity it is beneficial yes but wont do damage. If the heads have been shaved then it simple you need a shorter pushrod

[macca_779]

Any can with even moderate lift is going to run a smaller base circle than stock. This results in less preload on the lifter. Sometimes you can get away with it, but generally an extra .025 thou more rod minimum is a good idea. Regardless though you should always measure to know for sure regardless of what one shop assumes will be correct.

[vzmaloor8#150]

So a big cam with stock pushrods, unshaved heads will cause valvetrain noise?

[peter b]

So a big cam with stock pushrods, unshaved heads will cause valvetrain noise?

can do yes. Sometimes you get away with it most times no

[vzmaloor8#150]

How do u work out wat length push rods r needed then?

[VendeTTR]

I ran a 228/230 comp camshaft in my ls1 for over 2 years and 50k of use with stock pushrods, stock timing chain, stock lifters etc. All that was changed was the valve springs. No issues or added valvetrain noise. If I could have afforded to change them all at the time I would have though

[peter b]

I ran a 228/230 comp camshaft in my ls1 for over 2 years and 50k of use with stock pushrods, stock timing chain, stock lifters etc. All that was changed was the valve springs. No issues or added valvetrain noise. If I could have afforded to change them all at the time I would have though

It comes down to how aggressive the camshaft is. Some cams the ramp rate is more gradual and can get away with stock pushrods. Some have a more aggressive cam and need different length pushrods

[vzmaloor8#150]

I don't want to hijack the thread, but am intrigued now wondering if I should do my pushrods. The cam is a 238/240 with 620 odd duration and 114 lsa if I remember correctly. Std roller rocks nitrated double springs double link timing chain. I have noticed a fair bit of valve train noise.

[peter b]

I don't want to hijack the thread, but am intrigued now wondering if I should do my pushrods. The cam is a 238/240 with 620 odd duration and 114 lsa if I remember correctly. Std roller rocks nitrated double springs double link timing chain. I have noticed a fair bit of valve train noise.

Well yes but it isn't an easy thing of just saying put xxx length pushrod in it. You will need to work out the rocker geometry and adjust accordingly. If you have never done this I recommend you take it to your performance workshop