What are the 340 cam spec #'s?

[TrashedCharger]

I know that this seems like a lame question, but what are the specifications on a stock 340 camshaft?

I have a Hughes HEH1019AL grind# for my 360 and I have a lot of friends running factory 340 camshafts in their 360's. I have seen what these engines run with the 340 cam, but since I have the Hughes unit, I'm just trying to see how my camshaft will stack up against a factory 340 camshaft and what I can expect from it.

Thanks!

[DAHEMIKOTA]

Originally Posted by TrashedCharger

I know that this seems like a lame question, but what are the specifications on a stock 340 camshaft?

I have a Hughes HEH1019AL grind# for my 360 and I have a lot of friends running factory 340 camshafts in their 360's. I have seen what these engines run with the 340 cam, but since I have the Hughes unit, I'm just trying to see how my camshaft will stack up against a factory 340 camshaft and what I can expect from it.

Thanks!

1973 340 cam specs per Chrysler Corp.
Int opens (*BTC) 22
closes(*ABC) 66
Duration (deg.) 268
Exh opens(*BBC) 74
closes(*ATC) 22
Duration (deg.) 276
Dan

[norcalcuda]

Can't find my Hughes catalog, but, those numbers sound pretty small. Probably an 'RV' cam. Hard to compare to factory cams just by numbers anyway. Chrysler never printed the @.050 dur. specs. Best bet would be to call Hughes and ask. 309-745-9558

[TrashedCharger]

Forgot about the duration @.050" tappet lift specs. I'll call hughes and see what the 340 shaft specs out at .050".

The cam that I have isn't that radical. It is about a step up from an RV unit, but this is going in a 1972 D100 SE 2wd longbed 1/2 ton restoration/slight modified truck. I don't expect a whole lot from the unit, but it sure sounds like a good torque cam.

the Hughes unit looks like this:

Valve lift @ stock 1.5 rocker ratio:
INT-.461"
EXH-.489"

Valve lift @ aftermarket 1.6 rocker ratio:
INT-.491"
EXH-.522"

Duration @.050":
INT-210°
EXH-219°

Lobe separation angle:112°

Opening @.050":
INT- -4° BTC
EXH- 44.5° BBC

Closing @ .050":
INT- 34° ABC
EXH- -3.5° ATC

I would go bigger, but I plan on driving the truck places and probably acrossed states for mopar meets and vacation. I may even adapt a 2bbl and jet it for my setup for the road

[TK]

what are you looking for? mileage? too big for mileage, make good power though.
what gears
what compression
what intake
what carb