Camshafts 4age 20v Blktop

[srad]

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, 2009 by srad

[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 :hmm: but its great fun

Edited April 23, 2009 by tas_ae71

[Sam_Q]

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?

[offroader..]

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!!