• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Hi guys. It's been a while.
#1
Hi to all new and old alike.

The old horse has been behaving itself. Not that I drive it much.
I'm enjoying it a lot more since I put in an AOD.

I'm in Sunbury, Vic so getting anywhere from my town requires freeways.
Guys, the time has come to get rid of the boat anchors, aka, 2v open heads.

(the car is an Mcode but somewhere along the line the PO swapped it out for a 351 2V/FMX)
Looking at chi 2V heads and roller rockers.

Need to hear from guys with alloy heads. What comp are you getting.
chi has them in 60cc and 67cc.

cam is
https://www.enginemaster.com.au/crane-ca...50-cr52442

I hope to stick around a bit more these days... I'm getting itchy fingers again.

[Image: Image3.png]
Jim
  Reply
#2
(08-07-2018, 11:26 PM)JimNiki Wrote: Hi to all new and old alike.

The old horse has been behaving itself. Not that I drive it much.
I'm enjoying it a lot more since I put in an AOD.

I'm in Sunbury, Vic so getting anywhere from my town requires freeways.
Guys, the time has come to get rid of the boat anchors, aka, 2v open heads.

(the car is an Mcode but somewhere along the line the PO swapped it out for a 351 2V/FMX)
Looking at chi 2V heads and roller rockers.

Need to hear from guys with alloy heads. What comp are you getting.
chi has them in 60cc and 67cc.

cam is
https://www.enginemaster.com.au/crane-ca...50-cr52442

I hope to stick around a bit more these days... I'm getting itchy fingers again.

The Chi 2V heads ought to wake her up nicely.


You will need to determine whether your pistons are dished or flat top to calculate a compression ratio and select a chamber size.

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
  Reply
#3
pistons are flat top hypers?

I dread that the new hi comp heads will hit the valves to the pistons but if the current heads aren't doing it with the current setup, why should they?

Also love to hear from anyone who's gone to a different rocker ratio than stock. (and why)

[Image: Image3.png]
Jim
  Reply
#4
You will not have valve to piston clearance problems with that cam but, it still needs to be checked. I'd also look at the AFD heads. Chuck
  Reply
#5
I am running AFD heads and love them. Here is a link to them. https://www.afdheads.com/collections/cle...nder-heads
I am running Harland sharp roller rockers at 1.73. And a full comp roller cam.

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]




                                                                                             
  Reply
#6
DonC has posted a dynamic compression calculator that I had good luck with.


AFD or CHI, when you drop down into the 60cc range your static compression ratio will be somewhere in the 11:1+ range. Be sure to pair a camshaft with your head and head gasket choice that gets you in a dynamic range that is pump gas happy.... Unless you are okay filling up at the airport.
  Reply
#7
(08-08-2018, 04:41 AM)JimNiki Wrote: pistons are flat top hypers?

I dread that the new hi comp heads will hit the valves to the pistons but if the current heads aren't doing it with the current setup, why should they?

Also love to hear from anyone who's gone to a different rocker ratio than stock. (and why)

Assuming zero deck clearance you will be at around 10.5:1 with the larger chamber head.

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
  Reply
#8
very happy with the 10.5 comp. I'm leaning towards the 67cc now .ta.

I can get the AFD heads for $400 cheaper than the chi.
One thing that confuses me is the Aussie website state that the ports have been raised but the US distributor says they will bolt straight on?

For those with the AFD heads, were they a straight bolt on to your existing exhaust/inlet manifold/headers?
Does the CI (complete) package come with one piece stainless valves?

Thanks guys...

Jim

[Image: Image3.png]
Jim
  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  What are your guys thoughts on the new convex sport mirror assy OMS 27 1,069 09-21-2018, 04:04 PM
Last Post: jeremycfr
  How do you guys mount a license plate to front of a 73 NG8264723 4 835 06-12-2017, 08:41 PM
Last Post: mpbsr
  Need help guys. JimNiki 17 2,203 07-23-2016, 09:27 AM
Last Post: OMS
  Long time no see guys! Sumit 17 2,329 05-18-2015, 12:00 PM
Last Post: timachone
  What you guys think of my combo for engine. exceso 8 2,644 05-10-2015, 08:06 PM
Last Post: Spike Morelli
  A few 71's at Good-Guys Show 71mach1lady 9 1,451 03-16-2015, 04:14 PM
Last Post: 71mach1lady
  Mach 2013 Good-Guys Nashville 71mach1lady 2 738 12-20-2014, 06:22 PM
Last Post: jb73Mach
  Duraspark Upgrade Guys mdan575 1 906 11-26-2013, 02:18 PM
Last Post: Mister 4x4



Users browsing this thread: 1 Guest(s)