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post #1 of 26 (permalink) Old Dec 7th, 19, 11:37 PM Thread Starter
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new cams for 1969 350

hi guys
I would like to add. new cams to the 69 350
so I do no not know what cam is in the car now but I would like to get more of that classic muscle car rumble - yes I have a little bit of that and I here it mostly in the rear
I just added the pypes exhaust kit to the factory manifold that helped a bit but still not what I know it could be.
I would like the new cam to sound good but alls be responsive - if int increases hp or more toruq well thats even better

here is what I do know I have in the car
350 ENGINE
HOLLEY SNIPER EFI CLASSIC GOLD FINISH
TURBO 350 AUTOMATIC TRANSMISSION
10 BOLT POSI WITH 3.31 GEARS
POWER STEERING
POWER DISC BRAKES

what type of cam would give me this sound and still be responsive with stock manifolds
if I need to upgrade to headers I have no prob doing that as well
I just know what set up would be good for stock 350

thanks
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post #2 of 26 (permalink) Old Dec 8th, 19, 05:27 AM
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Re: new cams for 1969 350

Great question as I am in a similar situation without EFI. Can't wait to hear responses.
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post #3 of 26 (permalink) Old Dec 8th, 19, 07:18 AM
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Re: new cams for 1969 350

You don't buy a cam for sound You buy a cam to optimize performance based on your build and the intended use of the engine,

To determine the cam that is best for your car you need to figure out what you have already. Do you have a roller or flat tappet cam? What is your compression ratio?

If your #1 goal is sound then I suggest you install some long tube headers. Will sound better then the sound you get with stock exhaust manifolds and give you a little more power

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post #4 of 26 (permalink) Old Dec 8th, 19, 07:31 AM
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Re: new cams for 1969 350

Quote:
Originally Posted by Vega$69 View Post
You don't buy a cam for sound You buy a cam to optimize performance based on your build and the intended use of the engine,

To determine the cam that is best for your car you need to figure out what you have already. Do you have a roller or flat tappet cam? What is your compression ratio?

If your #1 goal is sound then I suggest you install some long tube headers. Will sound better then the sound you get with stock exhaust manifolds and give you a little more power
John is right on the decision process. Also, considering you're running an auto trans with a stock converter you will want to stay away from cams that will hurt your drivability. My suggestion is taking a look at this Chevy Performance cam: https://www.summitracing.com/parts/n...make/chevrolet

It's a flat tappet hydraulic cam that's good for a warmed over daily driver and it will continue to work well for you as you add other improvements such as long tube headers. This is the same cam Chevy uses in their 350 crate engines today. https://www.gmperformancemotor.com/parts/3896962.html

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post #5 of 26 (permalink) Old Dec 8th, 19, 07:39 AM
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Re: new cams for 1969 350

Just went thru this, 69 350 wanted good rumble, and not be soggy and have good low end and decent top end performance.
Went with towards rattler cam part number 118001-09. It gave me exactly what you are looking for. I also went with a little stiffer spring and 10 degree retainers number 98212-K12.

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post #6 of 26 (permalink) Old Dec 8th, 19, 07:45 AM
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Re: new cams for 1969 350

Quote:
Originally Posted by chicoman View Post
Just went thru this, 69 350 wanted good rumble, and not be soggy and have good low end and decent top end performance.
Went with towards rattler cam part number 118001-09. It gave me exactly what you are looking for. I also went with a little stiffer spring and 10 degree retainers number 98212-K12.
The 109 LS on this cam is not very good when running a TH350 and stock TC. Would be better with 112-114 LS

The Rattler is Ok for a manual tranny.
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post #7 of 26 (permalink) Old Dec 8th, 19, 07:48 AM
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Re: new cams for 1969 350

This cam gives me 13 inches of vacuum at 800 rpm idle, yes i have a 4spped, but with that amount of idle vacuum and a sniper efi , he should be able to tune and be ok with auto trans.

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post #8 of 26 (permalink) Old Dec 8th, 19, 07:52 AM
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Re: new cams for 1969 350

Quote:
Originally Posted by chicoman View Post
This cam gives me 13 inches of vacuum at 800 rpm idle, yes i have a 4spped, but with that amount of idle vacuum and a sniper efi , he should be able to tune and be ok with auto trans.
With the TH350 his idle will need to be at 1000-1100 rpm with this cam. With the stock TC it will not work well IMO.

Best to call Comp and ask them for a recommendation
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post #9 of 26 (permalink) Old Dec 8th, 19, 07:55 AM
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Re: new cams for 1969 350

OP

Very good advice given. You need to know what you have, flat tappet for full hydraulic cam now.

Cam and torque converter, if you have a automatic car, need to work in harmony. You generally install a higher stall TC with a larger performance cam as those cams start to make HP at a higher RPM than stock. Rear gears is also a factor to consider

Comp "Thumper" cams produce the kind of sound you may be looking for. Highly recommended you install new lifters with a new cam/ You will then need valve springs matched to the new cams lift and open & closed spring pressure requirements

one example of a Thumper cam

https://www.summitracing.com/parts/c...make/chevrolet

Headers for any motor will give a deeper exhaust note
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post #10 of 26 (permalink) Old Dec 8th, 19, 07:56 AM
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Re: new cams for 1969 350

I agree a slightly loser converter would help him with this cam.

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post #11 of 26 (permalink) Old Dec 8th, 19, 08:05 AM
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Re: new cams for 1969 350

Adam, I think the point John is trying to make is the end result has many times a lot of underlying requirements to get to the desired end. In order to obtain the "Sound", if you just did one step (cam), it will actually make the performance worse. His suggestion of the long tube headers, which you are wanting to do anyway, will improve performance AND get closer to your desired sound.
John's (and other's) suggestion of laying out a plan and thinking things through has been a proven success and highly recommend.

If you want sound, do the long tube headers with a new exhaust and add cutouts. Then you could flip a switch and get all the rumble you want!


Good luck,
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post #12 of 26 (permalink) Old Dec 8th, 19, 08:05 AM
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Re: new cams for 1969 350

Quote:
Originally Posted by chicoman View Post
I agree a slightly loser converter would help him with this cam.
And your are most likely running a different rear end ratio. The OP has 3.31.

There is no one size fits all for cams.

Something like this may work well.

https://www.summitracing.com/parts/c...make/chevrolet

Last edited by Vega$69; Dec 8th, 19 at 08:19 AM.
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post #13 of 26 (permalink) Old Dec 8th, 19, 08:18 AM
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Re: new cams for 1969 350

rear gear is 3.42, performer intake, @9.25 to 1 comp, holley 670 street avenger, 1 5/8 long tube headers, 4 speed. Howard recommmend 1800 stall with auto trans, but stock converter ok . Cam taken out was comp 262, this cam gives a little better all around performance, no loss in low end, comp cams 262 was i think a 110 lc, but the howards gives me what i wanted, great sound and good performance, i think he would be happy.

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post #14 of 26 (permalink) Old Dec 8th, 19, 08:22 AM
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Re: new cams for 1969 350

Quote:
Originally Posted by chicoman View Post
rear gear is 3.42, performer intake, @9.25 to 1 comp, holley 670 street avenger, 1 5/8 long tube headers, 4 speed. Howard recommmend 1800 stall with auto trans, but stock converter ok . Cam taken out was comp 262, this cam gives a little better all around performance, no loss in low end, comp cams 262 was i think a 110 lc, but the howards gives me what i wanted, great sound and good performance, i think he would be happy.
The 262 is a 114

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post #15 of 26 (permalink) Old Dec 8th, 19, 09:08 AM
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Re: new cams for 1969 350

Quote:
Originally Posted by Vega$69 View Post
The 262 is a 114
not always
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