adjustable cam pully yes or no?

[keithsw0]

any one using one and are they worth buying

[Boghopper]

I am interested in an answer to this as well.

Can you improve an otherwise standard engine by playing with the cam timing?


Pete

[prj]

"To Improve" is way too vague.
You can make the higher end more responsive at the cost of the lower end and vice versa.
Such is the fate of engines without variable valve timing.

In either case, you will need a remap to take advantage of it.
On an otherwise stock engine, it is not worth it at all.

I would not touch cams until about 350hp.

[Error404]

You'd need to fit an adjustable sprocket to the intake cam too for any really worthwhile tweaking, cam clocking is a dark art unless you or your tuner know exactly what you're doing I'd leave it be

[repo]

You can make the higher end more responsive at the cost of the lower end and vice versa.
Such is the fate of engines without variable valve timing.

I disagree. Standard cams and their timing are not a good compromise. They are timed to meet the emissions and desired fuel mileage, not performance on neither low nor the high revs.

So by reclocking You can gain performance on all ranges (up to a point of course), with cost of emissions and fuel economy.

To answer original question, yes, they are deffo worth buying, but You need to know what You're doing with them. Otherwise it may end up in poor power, ultimately a disaster when pistons hit the intake valves.

[prj]

I disagree. Standard cams and their timing are not a good compromise. They are timed to meet the emissions and desired fuel mileage, not performance on neither low nor the high revs.

So by reclocking You can gain performance on all ranges (up to a point of course), with cost of emissions and fuel economy.

Very well, but someone with an otherwise stock engine would not need to do this...

[Dan]

On a slight tangent, has anyone run cams other than S2, RS2 or 7A? Are there any aftermarket cams that are meant to be a better comprimise (either for road or track driving)?

[Error404]

NM cams are supposed to be a good upgrade with the right clocking, Jamo is running those IIRC, the Repo man has done his for him

[terrybullwon]

Very well, but someone with an otherwise stock engine would not need to do this...

I think it's far to say thats a opinion and not a fact

[prj]

I think it's far to say thats a opinion and not a fact

Sure, I mean people turbocharge honda civic's all the time too...

[terrybullwon]

Sure, I mean people turbocharge honda civic's all the time too...

Sorry how dare I question your far superior knowledge

[Thuppu]

Heh, I just got these today

[prj]

Sorry how dare I question your far superior knowledge

That was uncalled for. You understood exactly what I said, and this just was not needed.

[urs4guy]

On a slight tangent, has anyone run cams other than S2, RS2 or 7A? Are there any aftermarket cams that are meant to be a better comprimise (either for road or track driving)?

Hey Dan

I run custom cams specced for my stroker motor. I also run variable timing and solid lifters on both my cams and the results from tweaking the timing were negligible because of the rather severe nature of the lift and duration of the cams. As far as driving feel, the car has a ragged idle at about 1200 rpm and feels similar to my old Big Block Corvette that I used to run back in the day. Very nice to feel the loping of the motor and then the ultra quick revs as you hit the gas. Unfortunateley we're visiting family for Christmas in SoCal and I can't go out and fire up the urS4 right now ;>(

For anything a little lower on the building level than mine, my guy Dave Jones, uses both 7a cams and has found more benefit from them than the single RS2 exhaust cam.

Hap, wit dakine feelin not from Evahboost, Maguire

[keithsw0]

so on stock cams with 450 ish shall i go for it seen one on ebay 66 quid what do you think mina will be mapping