Dave Robsons Challenger R/T

Dave-R · Post by **Dave-R** » Mon Jul 13, 09 8:52 am

Some updates from the weekend.

I was having some overheating problems with the trans so fitted a better cooler unit. This has worked as the trans now runs at 160F.

The temp modification I made to the timing stop in the MSD dizzy, in order to suss out the size I needed, was starting to fall apart so I had to make a new permanent bush of the correct diameter.
I found some unused nylon fuel bowl screw washers that were just about the right size. So I stacked two together and nipped them up tight.

I am using one light silver and one heavy silver spring.

This resulted in 18 degrees initial and 36 total. Half of it is in by 1500rpm and the rest by 3000rpm. That will do for now.

I also fitted a 6.5 inch power valve, went up one jet size on the center carb to #65s, and increased the idle mixture a bit.

The car now idles stronger but is a bit too rich (12.4:1) until 3500rpm. So I think I need to go down one jet size again and open up the outer carb jets a touch more.

I wish I had been able to figure out a way to fit throttle position sensors on the carbs because knowing when they open would make things easier.

Ivor · Post by **Ivor** » Mon Jul 13, 09 9:22 am

With all that university technology available to you Dave I would have thought you would have sorted that in no time.

Pencil cam under the bonnet pointing at the carbs with a 12 volt inspection light so the camera can see what's going on, bnc lead running in through the window with a monitor sitting on the passenger seat and go for a blast!

I'll get me coat.

Dave-R · Post by **Dave-R** » Mon Jul 13, 09 11:11 am

Actually. You have me thinking there.

A microswitch and a light would probably do in a pinch......

MrNorm · Post by **MrNorm** » Mon Jul 13, 09 11:53 am

Ivor wrote:Pencil cam under the bonnet pointing at the carbs with a 12 volt inspection light so the camera can see what's going on, bnc lead running in through the window with a monitor sitting on the passenger seat and go for a blast!

Actually that is pretty much my future plan for checking out a few things under the hood. Cheapo webcam (I have one anyway but £10 should get one) to a laptop (already have one) on front seat via USB. Cost - next to nothing.
Might not even need a light.

Ivor · Post by **Ivor** » Mon Jul 13, 09 12:00 pm

Blimey!

They don't say I'm good for nothing!

Luckily, on the Barracuda I'll be able to see the carbs through the windscreen

db · Post by db » Mon Jul 13, 09 2:36 pm

Bit o lateral thinking there Ivor, well done!!

Dave-R · Post by **Dave-R** » Mon Jul 13, 09 5:29 pm

Maybe I was going slightly uphill on the lower rpms and downhill on the higher rpms?

I will have to do more tests and do them along the same stretch of road. Not easy with all the traffic around here.

Idle in gear (and out in traffic) vacuum sometimes goes down from 8" to 7" too. That 6.5 inch power valve might be too close a rating?

Anonymous · Post by **Anonymous** » Mon Jul 13, 09 5:34 pm

All that is way to technical for me dave,if it works i hoon it if it doesn't i kick it and it goes back in the garage lol

the dodge · Post by **the dodge** » Mon Jul 13, 09 7:39 pm

strokerblue72 wrote:All that is way to technical for me dave,if it works i hoon it if it doesn't i kick it and it goes back in the garage lol

thats why you'll never have a 12 sec car!!!

good stuff Dave looking forward to seeing your car at the nats

Dave-R · Post by **Dave-R** » Mon Jul 13, 09 9:35 pm

Yeah I will be there for sure now the trans is behaving. But 250 miles is a long way to go and i will be much happier if I can get the carbs tuned as good as possible before then. That way i can just drive it and chill out and if it does not run the numbers I will not care as long as everything is working as it should.

This could be the last time I drive this car up the strip. So i want it to go well.

Guy · Post by **Guy** » Mon Jul 13, 09 11:01 pm

Dave wrote: This could be the last time I drive this car up the strip. So i want it to go well.

Whys that Dave

Anonymous · Post by **Anonymous** » Mon Jul 13, 09 11:14 pm

Guy wrote:
Dave wrote: This could be the last time I drive this car up the strip. So i want it to go well.

Whys that Dave

Thats a daft question............................

...............cause hes giving that 440 monster to me thats why!!!

Dave-R · Post by **Dave-R** » Tue Jul 14, 09 9:02 am

Guy wrote:
Dave wrote: This could be the last time I drive this car up the strip. So i want it to go well.

Whys that Dave

Seriously thinking of jacking the whole hobby in. Or maybe just sell the Chally.
It depends on how much fun I have in the next few weeks. Plus I could REALLY do with the money from selling the car. I have been in a very tight financial spot since I had to have all that time off work. I am getting sick of the stress and worry. I don't need it.

It does seem daft after finally getting the car where I want it. All that hard work etc.

But I am tired.

AllKiller · Post by **AllKiller** » Tue Jul 14, 09 9:12 am

Its the dpressing calm before the storm Dave.....

Finances thats one of the reasons my car hasnt really gone any quicker in the last few years, And probably wont this year

.. and there has been a few times ive thought why am i doin this ? ...

...a few blats down the 1/4 and you'll be right back there in the Hot seat.

Full respect to your commitment, and that sodding long drive to Race your car

Anonymous · Post by **Anonymous** » Tue Jul 14, 09 9:34 am

Oi Robbo.......dont be taking nonsense or I will give you slap!!

Mopar is in your blood mate. We all go through bad times now and then but I will take more than an illness to bring you down, chin up Dave enjoy the Nats and then concentrate on getting stronger and stronger.

Maybe this will motivate you now listen carefully............If you even dare try to sell that car I will buy it.........just imagine the hardship it would have with me your pride and joy..........now then that should stop you selling the car haha!!!