The heads turned up today , and they look just like the photos funnily enough......
So, we'll be selling the cam we used this year (hey, it's only done about 30 miles) as it is a profile ground for hydraulic lifters and getting a billet cam most likely something like this one....but specifically for the solid lifters and bigger valves
Profile Actuation Make/Model R/Ratio
1644a Roller Follower Holden V6 3.8 In1.6 Ex 1.6
--------------------------------------------------------------------------
Cam Lift Duration Duration Valve Valve Lift Phase
Adv @050 Clr Lift tdc <)
--------------------------------------------------------------------------
Intake 361 300 249 0.016 0.5616 113 107
Exhaust 361 300 249 0.016 0.5616 098
--------------------------------------------------------------------------
Timing Timing
Adv @ 0.05
Open Close Open Close
Exhaust 77 Bbdc 43 Atdc 53 Bbdc 16 Atdc
Intake 40 Btdc 80 Abdc 19 Btdc 50 Abdc
83 35
Deg Over-lap Deg Over-lap
Intake Centreline 105.5 Exhaust Centreline 108.5we considered it for this year, the extra expense of it having to be cut from fresh stock as opposed to a regrind was the decider on top it being pretty extreme when we had close to stock heads........So that means another set of push rods........
So , we're getting there now. This year we fell short of the 200 mark , let down by an oiling system and lifters that really, were made for grocery getters.... we had more comp , we had a cam designed to make power higher in the rev range, a better inlet and exhaust but we still had stock valves, stock lifters and stock rockers.
For next year we're hoping the motor will still be pulling past 7000rpm, we hoped that this year, but for next year we'll be a little more confident. So with the 2.77:1 diff and the 28inch tyres our co-efficient of speed is about .0301mph per revolution...... 7 grand with no wheel slip will give us a bit over 210, 7200? a bit over 216 and 7500 will get us to 225 or so... I'm thinking 215 would be pretty ambitious for next year......... for 2011 we'll be going down a few steps final drive wise to 2.41:1 and those speeds would translate to about 241,248,259.
Now , I'll be the first to admit that's a
grey area as to whether our motor will pull that ratio .......but when we put the blower on it we might just have a chance....
"
some may say I'm a dreamer"
The Colonel dropped over on the weekend and we went out and stared at the tank, we talked about the way it drove this year....how i'd given it a fair bit of toe-in. We reasoned that was a bad idea....and that the steering train could be better. Currently we have a steering box from a VW van, but when we were building the Rev bought a rack from a 911 that has the pinion at right angles in the centre. The Colonel insists we'd be way better off with it, we rejected it during the build because the boots would hang outside the bodywork. To be dead honest I'm not in any hurry to drive the car the way it was this year at any speed much above what I was doing.....I'm a thrillseeker , but there are limits.
So I'm gonna have a look around at Stilletto racks as well, the 911 rack is fine , but it's big, if we can fit it all inside the tank it would be a whole lot tidier aero wise.
That's it for now folks.....