I'm about to buy a set of camshafts for my 4age 20v blacktop there going to be 272 with 8.5 lift .would i have to change the springs ? and is that the best profile for hill climbs as i want a lot of bottom end power

Edited April 22, 200917 yr by srad

valve springs should be fine if your staying within the standard rev limit.

 

as you may have already found 20v's do tend to lack bottom end grunt, a short diff ratio/smaller tyre diameter would help keep revs up.

 

i would have thought and in my experience that i don't use the bottom end revs (below 4,000) at all on hill climbs or the power dies. i am running a 290degree cam tho :hmm: but its great fun

Edited April 23, 200917 yr by tas_ae71

valve springs should be fine if your staying within the standard rev limit.

 

as you may have already found 20v's do tend to lack bottom end grunt, a short diff ratio/smaller tyre diameter would help keep revs up.

 

i would have thought and in my experience that i don't use the bottom end revs (below 4,000) at all on hill climbs or the power dies. i am running a 290degree cam tho :y: but its great fun

 

either thats a matter of opinion or you have driven engines with a worse setup than mine. I find my engine and a friends have stacks of low down power. Did the 20's you drove have a good tune with an aftermarket ecu?

I'm about to buy a set of camshafts for my 4age 20v blacktop there going to be 272 with 8.5 lift .would i have to change the springs ? and is that the best profile for hill climbs as i want a lot of bottom end power

 

 

Hi there mate just wondering what brand cams your going to go for i'm looking at getting a set for my silver top!!