Mopar guys, Nick dyno tests 440 6-pack, Max Wedge 'up ram' exhaust manifolds against factory high performance manifolds. Whoa!

Very good Nick, now you know what every B/RB guy since the beginning of time knows- the factory HP exhausts are crap.
I would have liked to see him use a set of fender well headers though, cast iron or steel the way they have to hug the block to keep everything inside the engine bay isn't doing the flow any good.

I would like to see him compare the 6-pack to a 750 Edelbrock. Reason is the center carb is rated 350 cfm, outboards are 500 each, 1350 cfm is fine for 600 cid, but low velocity for 440. Notice how poorly the gas flows from the outboards, spurts doesn't even vaporize, poor combustion. Sure looks good though. Factory rating was 390 HP 6-pack, even 750 would be max size.

The 750 would pound the sixer into the ground, it was purely an optics response from the MoPar camp to catch the eye of the GM Tripower guys. Even most of the serious MoPar guys who bought new sixpacks either at least switched them over to mechanical secondary Holleys or went to a large quad. Maybe the most annoying thing about them was a noticeable lag before the vacuum outboards would open up AND THEN if that wasn't enough you got the same effect in reverse when you backed out of it. Not really over carbed as far as being too much air for the engine though since they didn't actually open all the way up. Way testing my memory here 50 years back. Black was stiffest, then purple, then yellow and silver was softest?

Well, now we know...

Buttered popcorn kinda good.

I forgot about all the Worlds problems watching that.

Thanks for posting.


Gearheads on a Friday night...

BillyBob her cuzin n yiseree that Cuda one purdy gal wif all that hollowood makeup but now, looky her cuzin hers her grandma stark naked n bootiful to... as grandmas go fer cryin out loud

Thank you Virgil Exner, the automotive stylist who nearly single handedly killed Chrysler Corporation. Freaky looking then and freaky looking now, I kinda like them but pretty they are not.

Some maniacs used to bore and stroke the RB Chrsylers out to as big as 572 ci, reliability seemed to suffer though.

Imagine the old 413 cross ram on a 572, torque like a diesal.

Nobody on this thread knows what any of this means....lol

Well, now we know...

Buttered popcorn kinda good.

I forgot about all the Worlds problems watching that.

Thanks for posting.


Gearheads on a Friday night...

gearwoman lurks

I always liked the slant six and what some people have been able to achieve with that engine. Lots of info. on Youtube

You'd like this then- a 1st gen Barracuda with the baby 170CI slant six that runs a certified 132.85 mph average of two runs. He says he shifts it at 7000 RPM.

[link to www.motortrend.com (secure)]

I had a buddy long long ago who had a 170 in a '61 Lancer and I can testify that that little booger would SCREEEEEEEEAM and not blow up no matter how much it was abused.