hawks70

Mainly want to know what cfm Carb and torque converter will help me get most from this setup. Its a rebuilt 350. Stock bore and stroke .the heads are being milled to compensate for thicker head gaskets , all new seats and parts. I'll be using the original 350 trans rebuilt with a shift kit put in. I have a later model factory 4 barrel intake I plan to use in place of original 2 barrel set up and am switching to a hei distributor. The car has a 3:42 rear gear. Attached is a pic of my spec sheet for the cam. What do you guys think? Any input appreciated. Thanks for your help.

oldcutlass

If it were me... if your just building a cruiser, a quadrajet, or you would have to adapt a squarebore carb. I'd run a 1800-2200 rpm converter. A good set of headers or just plain ol duals with stock manifolds.

analogkid455

How much compression are you going to end up with? I hope it's at least 10:1 with that cam.

I would use a 3000 stall with that cam. Peak torque is going to be around 4000 rpm.

That cam closes the intake valve really late, causing you to lose cylinder pressure at low rpm.It is a very old design and was optimized for ch3vys. Why don't you get a more modern cam? You don't want that much exhaust duration and the LSA should be alot tighter. It will just work better.

krooser

I would use a different cam too... or at least install that one a few degrees advanced to get the peak power down in a usable rpm range.

OK..... I stand corrected... I read the cam card sideways...

analogkid455

The peak hp should come in around 5000 rpm. That cam has a narrow power band.

hawks70

Thanks for the info. Guess I should have asked more questions before I bought the cam. I guess I'll just run it with the little bit of advance.see what I think of it. Just gonna be a sunny day cruiser anyway...

captjim

WTF are you guys looking at? That is just the old generic 204/214 cam. I had one in an 8 to 1 engine and it ran fine.

analogkid455

Sure, it will run fine, but you'll be leaving alot of power on the table and mileage will suffer.

captjim

I don't get what you are saying. That is a VERY mild cam, it won't breathe at all at 5,000 and certainly does not need 10.1 compression. It would not even run on pump gas. Are you sure you are looking at the specs right? .448 and .472 lift?? 114 lobe sep

analogkid455

Yep. With the 280/290 duration and the wide 114 LSA the intake valve closes at 70 degrees ABDC (seat timing). Dynamic compression ratio will be 7.5:1 with 10:1 static compression.


After looking at it a little closer they grind 4 degrees advance in it and then they want you to advance it 4 more degrees, so with that installed position 9.5:1 is about as much as you want with iron heads.

At 8:1 your leaving 30 hp and 30 tq on the table.

Also your right Jim, it will peak at 4500 rpm at that point with 8 degrees of advance.

captjim

Erik, the duration @ .050 is 204/214, you are reading the card wrong. The 280/290 is @ .006 liftThis is the old genereric Performer cam that has been around forever. It is lazy, but has been used for years on mild 350s.

analogkid455

I know, just saying, to get the most out of it, 8:1 CR will leave power on the table. What cranking pressure are you getting in yours? Do you run 87 octane?

captjim

You are dead wrong on this and I'm not goping to argue with you. You are simply mis-reading the card. I can't believe a guy with your experience did not recognize this cam right away. It is a VERY mild cam meant for stock small blocks with low compression and stock converter and gears.

captjim

Maybe this will help,
http://www.summitracing.com/parts/ed...ake/oldsmobile

"Edelbrock's Performer-Plus cam and lifter kits are designed for optimum torque from the low-end to the mid-range. They feature smooth idling cams for daily drivers, trucks, vans, RVs, and 4x4s. They offer improved throttle response and torque"

analogkid455

I'm not arguing, Jim. You know me. I am not like that.

I have dealt with this cam before, also. But I guess comparing it to better cams I feel it isn't very good. The stock cam worked better for me with low compression.

oldcutlass

It's basically an rv cam, I recommended 1 level over stock on the converter. It will perk his 350 up a bit and run fine with stock heads.

captjim

I agree it isn't the best one out there, but to say it needs 10 to 1, a 300 stall, and that the power range is at 5000 is just plain wrong. You mis read the card.

analogkid455

I corrected myself and said it would peak around 4500 rpm. Depending on the rest of the combo.

I have used a 2500 stall with this cam and it was soft down low.

OldSchoolMuscle71

so the performer cam is a decent step up from stock? will it work with 2.56's or 3.08's with stock converter?

captjim

Stock is .400 and 194 @ .050, so yes, it is a step up. But, I agree with Erik that there are a lot better came out there.

OldSchoolMuscle71

do u recommend upgrading the cam when it comes time to pull out the motor for upgrades? I figure I can do it all right the first time instead of just adding parts and hoping for more power. Its still my daily driver. So far all I have done is long tubes, H pipe, and exhaust. Hopefully pertronix, 3.08 posi, performer manifold and quadrajet or eddy 600 will wake it up and give it more pep in its step. I had the car dyno's at school and it put out 130 HP w/ 223 ft. lbs This was dont before I had the exhaust work done so those numbers reflected bone stock with a minor exhaust leak on the passenger side, single exhaust, and I dont think the carb was tuned properly (2bbl)

captjim

You should probably start a new thread and you will get more replies.

krooser

hawks70

OK. Lots of info here. Next week I get the heads back. They did new seats, new valves, new springs cause the stockers won't work with this cam. . Also new rockers cause the old ones were pretty worn.they slightly milled the heads and have convinced me to go with either a set of Cometics or Flat Out head gaskets instead of the thicker Feel pros that came with the kit I bought. I have another question.....will the original throttle cable for the two barrel setup work with the quadrajet? Thanks......

cutlassefi

Yes they will, you'd just need to measure the pushrod length because of the milled heads and valve job.
And the way I read it at 4atdc that's an intake centerline of 106 or 8 degrees advanced from the get go. That cam would do better as a single pattern on a 108 in at 104. Like it is it'll probably be laaaaaazy.
And you'll have another quandry. As you advance the cam to close the intake earlier, you'll also be opening the exhaust earlier. For a low compression low rpm application that's a no-no.

captjim

Just throwing this out there but one inexpensive option (if it is still an option) is to go through Rock Auto or Advanced and get the stock 307 442 cam. I don't recall the specs but I believe it is around 204 and .440.

Edit: found it at RockAuto, $245 with chain and gears
Kit Contents Part NumberDescriptionQuantitySize ChoicesCS-651Camshaft1 HT-951Lifter16Standard OnlyKT3-498SA3Timing Set - 3 Pc.1 55-403BPrelube1

hawks70

I may just have to. Course now I'll probably have to change the valve springs and all that again too cause they were set up to run with that cam?