Cam Considerations
Turbo Mini Forums

Hi Folks,

I need to replace my cam (rebuilding, and my 266 is not worth re-installing). Since I'm in the USA, my choices are a bit limited. I see that the Avonbar Ph2 is highly recommended. I've found the following, which to me seems close in duration/lift:

Elgin 268/278 Camshaft, Hot Street
ID: ELG005
Price: $157.97

Description: This cam has a 268 degree intake and a 278 degree exhaust duration and intake valve lift of .397" with an exhaust lift of .401" with 1.25 rockers. For hot street applications. 9.1:1 compression recommended. Sold outright, no core charge.

Based upon the Ph2 having 264|280 duration and 360"|400" valve lift, is this something worthwhile?

Or would this (originally recommended to me) be better:
Elgin 244/264 Camshaft, mild road
ID: ELG001
Price: $179.00

Description: This cam has a 244 degree intake and a 264 degree exhaust duration and intake valve lift of .327" with an exhaust lift of .327" with 1.25 rockers. For mild road applications, smooth idle.
Sold outright, no core charge.



I'll be using an old 1.3 large-oval pressed set of rockers, and will be going the MegaSquirt/FI route.

Thanks for any help on this!

**************************************
1967 Cooper 's' Turbo build @ www.drjing.com

You need to get the actual timing figures to establish the overlap between the inlet and exhaust durations... I suspect these are nat-asp cams, and a lot different to the ph2.

I have a cam you might be interested in... Will send a PM.

Thank you, Dave. I look forward to your PM!

**************************************
1967 Cooper 's' Turbo build @ www.drjing.com

hi dr,
if your going to run fairly low boost , say 7 psi , and a high compression ratio say 9:1 then the cam can be a normal sort of timing , it will work better at the low boost areas due to less back pressure on the engine .at higher boosts it wont work so well but if your not going to run those boosts theres no point in camming for them .if your going to run a high boost low cr engine . then you need to find a greater spread between the inlet and exhaust lobe ,or lsa , and then you can use a similar lobe to the one you may run on the low boost engine but with a greater lsa ,this sort of cam wont work so well off boost but will be better at the higher boosts due to less exhaust reversion .
regards
robert.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Planning on running 10 - 15 lbs. of boost (at least, I hope to!), so I guess these cams won't work. Dave has a cam I'm keen on, though, and says it should work just fine. Looking forward to putting it all together! :)

**************************************
1967 Cooper 's' Turbo build @ www.drjing.com

Wasnt Mini1071 ( think thats his screen name ) having his cams ground in the US ???

Whilst cams can offer good increases....standard fit n/a cams will also usually work very well in turbo applications. Sometimes more so if you intend using a lot of boost, and will have high EGBP to deal with.

The 244/264 sounds as if it wcould be promising, but as the othes have said, need more info o LSA etc.

the relatively short durations, would mean reduced overlap...which generally with turbos, is a good thing.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

dave would not put you wrong !
so stick with him

also to add:-

imho the phase 2 would be the Better Choice!

although your 1st, first choice in the elgin cam range is excellent