Cam gears

I m going in for a set of HKS 264 In/Ex cams. Is it a necessity to install adjustable cam gears or should the stock ones be ok. I suppose you cant adjust timing with the stock one but does it run fine???

Anyone???

I m going in for a set of HKS 264 In/Ex cams. Is it a necessity to install adjustable cam gears or should the stock ones be ok. I suppose you cant adjust timing with the stock one but does it run fine???

I have the same set up in my engine and I have the stock cam gears.

Oh ok. so no adjustments made to timing then?

Yes they need to be setup, no real point in fitting an aftermarket Cam unless its timed as per manufacturers Timing Card Spec or you could end up loosing power - and the only way to adjust the timing is using Adjustable gears.

Mine are currently zero'd out (is this the same as fitting them to stock gears?), how much benefit is there to tweaking these? Anyone have any data from mapping sessions?

Just to show how important it is to setup cams, heres the important Timing data for HKS exhaust Cams

The Info indicates when the Valve will open to 1mm of lift

Exhaust Cam size---- opens to 1mm (before bottom dead centre)

256 ---- 41 degrees

264 ---- 46 Degs

272 ---- 50 degs

280 ---- 55 degs

Now assuming a Stock cam is around 38 degrees, if your running a 264 exhaust cam which is set as stock, then your exhaust cam timing is 8 degrees out

Yes they need to be setup, no real point in fitting an aftermarket Cam unless its timed as per manufacturers Timing Card Spec or you could end up lossing power - and the only was to adjust the timing is using Adjustable gears.

That's interesting. I should look at investing in a set of these in this case

Bear in mind that stock cams may well be off from the ideal setting just due to production tolerances.

A skimmed head or block WILL need adjustable cam pulleys to get the timing spot on though, as the timing belt geo has changed. How spot on you need it is down to how much you want to spend and how perfect your ambitions.

Bear in mind that stock cams may well be off from the ideal setting just due to production tolerances.

 

A skimmed head or block WILL need adjustable cam pulleys to get the timing spot on though, as the timing belt geo has changed. How spot on you need it is down to how much you want to spend and how perfect your ambitions.

Chris which brand would you recommend I go for, as you fitted the HKS 264's I bought

A skimmed head or block WILL need adjustable cam pulleys to get the timing spot on though, as the timing belt geo has changed.

And something thats often overlooked

Any, they are all much of a muchness. They are nice to have, but only as good as the care taken in setting them up. Don't think they'll find you another 50 BHP though

Any, they are all much of a muchness. They are nice to have, but only as good as the care taken in setting them up. Don't think they'll find you another 50 BHP though

It means I'll have to remove my chrome stock ones

It's not the bhp increase I'm looking for. I just don't see the point in having aftermarket cams if they're not set up properly. I'll have a look around and I'll order some soon. Thanks for your help guys

Chris which brand would you recommend I go for, as you fitted the HKS 264's I bought

JUN pulleys would be my choice.

http://img8.imageshack.us/img8/4995/juncamgears.jpg

Sounds good. The purple on the HKS would ruin my engine bay colour scheme

Can you PM me a delivered price and rough ETA please Nic. Thanks.

I ve come across threads such as this where people seem to get the best power on HKS cams at stock position.

What sort of gear do people use to time their cams up? Seems like there is a myriad of stuff out there but a lot of it is for pushrod engines and you have to have access to the front and back of the crank, which is a tad impractical if you're just testing different cam degree settings...