Dave Robsons Challenger R/T

Anonymous · Post by **Anonymous** » Mon Jun 15, 09 9:21 pm

super looking car dave,the dash looks the biz

Dave-R · Post by **Dave-R** » Mon Jun 15, 09 9:21 pm

Mick70RR wrote:Looks great Dave. Did you refit the overdrive switch and lights in your own bracket, and what's the other switches for?

Yes. Made a bracket.
The rocker switches are windscreen fan on/off and speed setting. No heater of course but even cold air up the screen will help clear it if it starts to mist up. I used to have them labled but can't get letraset the right size these days.

Mick70RR · Post by **Mick70RR** » Mon Jun 15, 09 10:32 pm

It's a brave man who drives a car in this country without a heater. Switches look nice, maybe get hold of one of those dyno machines for the text, been a few years since I used letroset.

Mick70RR · Post by **Mick70RR** » Mon Jun 15, 09 10:36 pm

Or Dymo.

http://uk.farnell.com/dymo/18486/labels/dp/6578378

mopar_mark · Post by **mopar_mark** » Mon Jun 15, 09 10:52 pm

Mick70RR wrote:It's a brave man who drives a car in this country without a heater.

Come for a ride in mine then, it's more of a case of a 'brave man that drives without AC'

Jeff · Post by **Jeff** » Mon Jun 15, 09 10:55 pm

Dave wrote:
Mick70RR wrote:Looks great Dave. Did you refit the overdrive switch and lights in your own bracket, and what's the other switches for?
Yes. Made a bracket.
The rocker switches are windscreen fan on/off and speed setting. No heater of course but even cold air up the screen will help clear it if it starts to mist up. I used to have them labled but can't get letraset the right size these days.

might be able to help you there dave

Philth · Post by **Philth** » Wed Jun 17, 09 6:53 pm

Superb work, Dave! Your Challenger has the perfect 'stance'.

Jon Connolly · Post by **Jon Connolly** » Sun Jun 21, 09 12:35 pm

Yep well done

Top car, lovely workmanship and attention to detail

Richard · Post by **Richard** » Mon Jun 22, 09 7:11 pm

That looks great Dave, love that trans am look. You've got a lot to be proud of there, I know it's not been easy for you recently.

Anonymous · Post by **Anonymous** » Tue Jun 23, 09 7:47 am

Lovely piece of motor you have there Dave. A credit to you. Always liked that car. Tough as a pit bull with a flick knife. Got the best possible engine too. 440+6's rock

Dave-R · Post by **Dave-R** » Tue Jun 23, 09 8:46 am

Richard wrote:That looks great Dave, love that trans am look. You've got a lot to be proud of there, I know it's not been easy for you recently.

Praise indeed from a master car builder!

Dave-R · Post by **Dave-R** » Tue Jun 23, 09 1:43 pm

Update on tuning.

I have done a series of tuning tests now.

At idle (in gear @ 800rpm) I currently have;
14.5 AF ratio and 8 inches of vacuum.

Driving in top gear at 2000rpm (only on the center carb) I have 13.7 to 14.0 A/F ratio and 16 inches of vacuum.

At 4000rpm (outer carbs should be open some) I have 13.2-13.4 A/F ratio and around 17-18 inches of vacuum.

Plans next are to go up one jet size on the center carb, add a fraction more initial timing (going to try 19 initial and 36 total), go a touch richer on the idle mixture, and change from a 4.5 power valve to a 6.5.

Ivor · Post by **Ivor** » Tue Jun 23, 09 2:06 pm

Blimey Dave, that;'s probably better than 75% of the cars currently on the road already...very impressive

Dave-R · Post by **Dave-R** » Tue Jun 23, 09 3:42 pm

It is much easier with the data recorder and wideband sensor.

I did have 12.7:1 ratio on the center carb and dropped two jet sizes to get 13.7 for better mileage and cleaner plugs at low rpms around town. But with the outer carbs not being quite rich enough i will go one jet up to even things out a little more. I would like to get around 13.1 with all carbs open and don't really want to drill out the secondary plates any more.

Jim · Post by **Jim** » Wed Jun 24, 09 8:59 am

Top work Dave!

Tough stance. That car is just right.
I look forward to seeing it again at the Nat's.