I have everything stock beside headers,exahuast and mallory unilite distributer....what kind of power gains will I get from this cam I have 3:08 gears posi track. th350 stock as well also will this have a choppy idle...thanks

Competition Cams Part
Number
Power RangeIdle
Quality/special requirementsValve Lift
Int/Exh
Duration Adv.
Int/Exh in degrees
Duration @.050
Int/Exh in degrees
Lobe
Centerline
#K42-229-4
268H
(not for computer controlled engines)

Oldsmobile 260-455ci V-8

Hydraulic Flat Tappet 1967*-1990
(*) only for 1967 models with 39° cam bank angle & .841" diameter lifters

1500-5500 RPM
Performance camshaft for mild street machines. Broad power, noticeable idle.

.456/.456
268/268
218/218
110°

 

I think it is too big for an 8 to 1 350. Just my opinion, but i tend to be very conservative with cams in 350s in a heavy car. You do have a little gear and headers, so it will probably be OK, but IMO throttle response will suffer. It has ten degrees too much duration, IMO. The idle will be pretty tame.

 

So maybe one smaller than this?...or will that not make a difference?

 

The stock cam is so mild (.400/194@.050) that an upgrade should increase power. The question is will it make enough difference to justify the cost and effort? Maybe. If you add 15 HP and 20 ft/lbs for $400, is that worh it to you?

 

Well looks like i have a dilemma....I'm not going to touch the engine for while like years
Just want to get a little more power to hold me off till i do a full resto...any other cam u recommend for what I'm trying to do i just want little more power and little chop in idle?......thanks

 

This is what the 260h comp sounded like on fast idle towars the end it slows down. If you want a little bit more "feel" of power i would go to a 3.42 gear that will pack a bit more of a punch . I would say 3.73 but some people do not like the rpms at crusing speed.


This is what it sounded with manifolds and quieter mufflers and it idling at roughly
650 rpm


that cam worked very well in that 9 to 1 combo on my 72.

 

Thats sounds nice my cutlass sounds pretty close to that.

. still wondering if a cam is worth it without rebuilding all of engine....thank u for clips

 

If it aint broke dont fix it Find a good core a build it over time and keep the stock one as a good running backup for if something happens. A cam swap with the stock compression and pretty much no other mods really wont make a big diffrence.

 

That is what i gathered from this thread and what i read from the internet....thank you for the straight forward answer when I get ready for resto ill have may 350 beefed up while the car is out of commission thank you