Originally Posted by Black EX-R6
For my next tech question regarding my future purchase......
As you know I am thinking of changing the cam in the xbgt I am buying. I have decided to keep the heads that are on it as they are same cast as the original GT ones. Apparently I need to change springs to suit the cam I am getting.
How much do stage two cams go for? Part price only. I am looking at buying something with rev range 2500-5500rpm as advised and want low end power more than top end so it accelerates faster during every day driving conditions. I have already got a quote of around $800 labor only to have new cam put in so if I add this to the price of the cam I will have my final install price for the new cam.
I know the car currently has a 600 holley on it.
I've got a complete camshaft kit with springs, retainers and locks. Here are the details:
Hydraulic Camshaft Kit: Blue Racer (bought by Crane) WG-1044K
Duration .050": 234*/244*
Lift at Valve: .562"/.588"
Valve Timing Details:
IVO: 10* ATDC
IVC: 44* ABDC
EVO: 59* BBDC
EVC: 5* BTDC
Dual Coil Springs: WG-1523
Max Lift: .620"
Outer Springs: ID: 1.060" OD: 1.460" RATE: 270#/Inch
Inner Springs: ID: .700" OD: .970" RATE: 133#/Inch
Installed Height: 1.850" (85-95#)
Coil Bind Height: 1.250" (235-255#)
This cam is a good 2500-6500 cam with strong mid-range and good, broad torque across the RPM band when used with a good dual plane or a small single plane inlet manifold, Tri-Y or 4-into-1 extractors. All parts are completely brand new and in the box. It may have lifters in it, but I haven't looked at it in a good while, so I can't remember.
It sounds like a "good enough" cam for your application. I don't want to come across as a salesman, as that is definitely not my purpose here. I have it just sitting on the shelf, and I'm not very likely to use it anytime soon as I am really a solid flat or solid roller cam bloke.
Desktop Dyno figures suggest:
382 HP @ 6000 RPM w/dual plane and 600 CFM carburetor
387 TQ @ 4500 RPM
430 HP @ 6000 RPM w/single plane and 750 CFM carburetor
409 TQ @ 5000 RPM
...both assume 10.5:1 compression ratio, small tube extractors with mufflers and 4V cylinder heads.
Ported (PowerHeads.com) Aussie 2V heads should be:
418 HP @ 6000 RPM w/dual plane and 600 CFM carburetor
399 TQ @4500 RPM
476 HP @ 6500 RPM w/single plane and 750 CFM carburetor
428 HP @ 5000 RPM
...as you can see, the cam makes excellent power in a hydraulic package. What is harder to see from peak numbers is that it makes broad power across a wider range due to the increased LSA.