i dont know if there are any six pack tuning experts on here - but i would i thought you could change the power valves ( i guess the outboard carbs have a power valve?) and put a lighter spring in the diaphragm ?
my '69 Plymouth
Moderator: Moderators
No power valves or enrichment devices in the outboards and that is the set up's Achilles heel.
You get the legendary "Stumble" as you have just opened up 2 x 500 cfm carbs and not added any fuel with them.
The engine soon overcomes this, but it is always noticeable if you floor it hard.
You get the legendary "Stumble" as you have just opened up 2 x 500 cfm carbs and not added any fuel with them.
The engine soon overcomes this, but it is always noticeable if you floor it hard.
Pete Wiseman; Cambridge.
Mopar by the grace of God
Mopar by the grace of God
hey folks, thanks again for the positive comments. well i've done the cam and the car is much better,
even on these very cold mornings ,two stabs of the throttle and it fires up straight away and ticks over on its own,
set the six pack and kickdown up as stock, it runs and drives great, have an air leak on the rear carb , but will sort that soon,
now its not a multi feet dance to stop, having to blip the throttle to stop it from stalling while slowing down in neutral .
the brakes could be better, but now i've 17 inches of vacuum at idle instead of 4.5 I can put power brakes on,
that's next weeks project, need a bit of heat in my garage first,,
also have to sort out the colour of my engine, had the correct shade mixed for the valley gasket and new rocker boxes, but completely the wrong colour for the rest of the engine, oh well something else to deal with,
even on these very cold mornings ,two stabs of the throttle and it fires up straight away and ticks over on its own,
set the six pack and kickdown up as stock, it runs and drives great, have an air leak on the rear carb , but will sort that soon,
now its not a multi feet dance to stop, having to blip the throttle to stop it from stalling while slowing down in neutral .
the brakes could be better, but now i've 17 inches of vacuum at idle instead of 4.5 I can put power brakes on,
that's next weeks project, need a bit of heat in my garage first,,
also have to sort out the colour of my engine, had the correct shade mixed for the valley gasket and new rocker boxes, but completely the wrong colour for the rest of the engine, oh well something else to deal with,
the middle carb does all the normal work, but its basically an eco-carb and does not like low vacuumhemi472 wrote:Great looking car
i dont know if there are any six pack tuning experts on here - but i would i thought you could change the power valves ( i guess the outboard carbs have a power valve?) and put a lighter spring in the diaphragm ?
there are ways round it with different base plates etc, but to be honest it was not fun round town and did about 3 to the gallon!!!!
it sounds fantastic now as well 
Si
1970 Charger 500
383 | 4bbl | 727 column | PAS | PAB | buckets/buddy - check out my photos HERE
If you don't want another same old brand-new car ... you could be DODGE MATERIAL
1970 Dodge Charger Registry - https://www.1970chargerregistry.com/
1970 Charger 500
383 | 4bbl | 727 column | PAS | PAB | buckets/buddy - check out my photos HERE
If you don't want another same old brand-new car ... you could be DODGE MATERIAL
1970 Dodge Charger Registry - https://www.1970chargerregistry.com/
That's part of the charm of a Six-Pack Pete. The little 'stumble' then it's like getting hit around the head with a baseball bat. It's fabulous, it's what makes the Six-Pack special, - more exiting sometimes than flooring the more progressive 2 x 4's on a Hemi.Pete wrote:No power valves or enrichment devices in the outboards and that is the set up's Achilles heel.
You get the legendary "Stumble" as you have just opened up 2 x 500 cfm carbs and not added any fuel with them.
The engine soon overcomes this, but it is always noticeable if you floor it hard.
Last edited by Jim on Thu Nov 10, 16 9:27 am, edited 1 time in total.
-
octanejunkie
- Posts: 399
- Joined: Thu Dec 04, 14 3:03 pm
- Location: Somerset
Hi Blue,
I didn't realise Dave wasn't a member any more.
Yes, Linda took the carbs and manifold across to the U.S. on a plane and brought them back on her return after the work had been done.
The Challenger did go well (not as well as a V6 Buick of course, but not bad for a Mopar
)
All the best
Sandy
I didn't realise Dave wasn't a member any more.
Yes, Linda took the carbs and manifold across to the U.S. on a plane and brought them back on her return after the work had been done.
The Challenger did go well (not as well as a V6 Buick of course, but not bad for a Mopar
)All the best
Sandy
Dodge This, Cat That
hi folks,
finally got round to fitting the new servo, master cylinder and bias valve, my car at some stage it had been fitted with discs on the front but still had the original drum / drum bias valve, but had been updated with a disc / drum manual master cylinder.
the brakes were never great , in fact my old roadrunner with drums all round stopped better ... LOL
anyway I did my research and found the bias valve of a '78 Cordoba had all the correct fittings to suit my car that had a drum / drum bias valve, it fitted with little problem, other than the headers being a pain in the arse to work round,
the master cylinder / servo combo fitted very well with new firewall gaskets etc, had the correct rod and fittings and was adjusted perfectly to drop straight in, just had to make the lines from bias valve to master cylinder,
a very straight forward job after bleeding, and checking the adjustment on the rear shoes,
I cant believe how much of a difference it has made, the car now drives more like a modern car, very little effort needed to stop, and has made it more of a joy to drive,
finally got round to fitting the new servo, master cylinder and bias valve, my car at some stage it had been fitted with discs on the front but still had the original drum / drum bias valve, but had been updated with a disc / drum manual master cylinder.
the brakes were never great , in fact my old roadrunner with drums all round stopped better ... LOL
anyway I did my research and found the bias valve of a '78 Cordoba had all the correct fittings to suit my car that had a drum / drum bias valve, it fitted with little problem, other than the headers being a pain in the arse to work round,
the master cylinder / servo combo fitted very well with new firewall gaskets etc, had the correct rod and fittings and was adjusted perfectly to drop straight in, just had to make the lines from bias valve to master cylinder,
a very straight forward job after bleeding, and checking the adjustment on the rear shoes,
I cant believe how much of a difference it has made, the car now drives more like a modern car, very little effort needed to stop, and has made it more of a joy to drive,
nice one Jay
Si
1970 Charger 500
383 | 4bbl | 727 column | PAS | PAB | buckets/buddy - check out my photos HERE
If you don't want another same old brand-new car ... you could be DODGE MATERIAL
1970 Dodge Charger Registry - https://www.1970chargerregistry.com/
1970 Charger 500
383 | 4bbl | 727 column | PAS | PAB | buckets/buddy - check out my photos HERE
If you don't want another same old brand-new car ... you could be DODGE MATERIAL
1970 Dodge Charger Registry - https://www.1970chargerregistry.com/
