Having my 69 350 rebuilt. I was going to have the orginal cam machined and reinstalled however it was suggested that I step up to a Ram Air IV Cam. The rebuild is nothing more than a stock rebuild. However I am changing from a 2bbl to a 4 bbl 600 cfm.

Any problem with this or suggestions?

Garz & Son
1969 350

Without knowing all the specs of your engine, I'd say the RA IV grind is way too much cam for a near stock 350 for street use.

I have a complete cam package for a Pontiac 350. I purchased the Cam (068 grind), lifters and valve spring and retainer kit from Crane. UPS made a shipping mistake and I've ended up with an extra kit, its For sale pretty cheap. Originally 300 bucks. 150 plus shipping gets it. All brand new in the box, lifters have plastic wrapping around them.

Chad

The cam I'm speaking of is a Ram Air grind.
443 465 lift
214 224 duration

Garz & Son
1969 350

That is more like an 068 grind which is a RAIII, a huge difference from a RAIV.

In a 350, I would go with..well, what do I know.

Those numbers don't match the specs of the Ram Air cams, or any other Pontiac cam, but it's probably a replacement for an 068, like the Summit 2801. Without decent rebuilt 4 bbl heads, that may still be too much cam.

RA IV cam (I have one) is 230/240 @ .050", 308/320 adv., .516 gross valve lift with 1.65 rockers (factory spec).

RA III used 067 (auto) or 068 (manual) same as other 400.
1969 9779067 200/213 269/277 54 113.5 .408/.407
1969 9779068 212/225 288/302 63 116 .408/.407


http://thefirstgensite.com/library/engines/enginecodes.htm

http://thefirstgensite.com/library/engines/camcodes.htm

When I spoke with the tech at Crane, I referred to the grind number "9779068" and he pulled it up immediately. That is the grind he sent me and I'm confident that it is the 212/225 288/302 116 LSA and .408/.407 lift.

I'll post that cam package in a few days in the forsale forum.

Chad

Assuming all else is bone stock, the IV cam is way too big.

The Summit K2800 would work best in that application. No need to run regrinds when you can get the Summit cam without lifters for $60.

The 068 was used in the 350 H.O.'s.
They also had big vlv hesds, and the cyl bores were chamfered on the intke side for better flow.
Also need a 750 q-jet and long branch exh manifolds, or 1-5/8 to 1-3/4" hedders with dual exh to make it work well.

I'm with Banshee on this one!

The 214/224 with .443/.465 lift is a generic grind produced by almost every cam company on the planet. It works quite well in most 350-360 sized engines of all makes. It can be considered a mild performance cam that has decent street manners with a bit of a lope in a Pontiac 350. One size down from that would likely be more in line with a stock rebuild.

Comparing the information at summit it looks like I could use the 2800 or the 2801. your thoughts on the two? It's a street ride but I would like to give it a little boost...Is the 2801 to much, which is similar to the lift and duration of the orginal one I picked.

Garz & Son

Don't forget your stock 2 bbl heads. They'll limit your performance and control your cam choice.

I am dropping a 4 bbl on it using a edelbrock performer 600 cfm and a manifold from a 1970 Bonneville.

All my local guys say I'm ok with the stock 2 bbl heads, 4 bbl, mild cam and I'm good to go. I came here for the expert opinion.

Garz

Actually, it was for intake side valve/bore clearance.

You will be fine depending on which 2 barrel heads you use (compression and valve size)

Add another 50-100 hp for a properly set up engine without sacrificing fuel use and drivability.

To give an accurate idea, the following is needed:

Displacement
Compression
Maximum shift rpm
Trans type (TH350, TH400, 3-speed, 4-speed manual)
Torque convertor stall speed
Rear gear ratio
Cylinderhead (chamber design (year), flow (ported?), valve sizes)
Intake manifold (dual plane, single plane)
Exhaust (stock manifolds, high flow manifolds, headers, single/dual exhaust)
Intended use (mostly street, street/strip, strip only, road racing)

So we know that it is a 350 with some overbore, and a dual plane intake. We just need the rest of the info.

YE Code 350 with some overbore
9.2 comp
47 heads
turbo 350 3 speed
Dual Plane
Stock exaust manifolds
No headers
Dual exhaust Flow masters
mostly street

Thats all I know at this point.

I would say for your combination, stay with the 2800. It doesn't have much more duration on either intake or exhaust, but more lift. This will give you some additional power without sacrificing idle quality and off idle throttle response.

I would also go one further since you are in process of rebuilding anyway and elongate the pushrod holes to run 1.65 rockers. This will again add more valve lift. The additional lift will help with those small valves on the intake.