Do you think this cam would work with a 1972 olds 455 stock intake big valve heads 2.07/1.68 ported bowls and filled and shaped midlle exhaust ports. With W&Z manifolds 2.5 exhaust back. Engine 10.1 roller adj rockers, 750 quadrajet im thinking 109 ls duration @ .050 235/243 lift 501/480 wirh a 2600 convertor. nice rough idle with increased mid. Hp&trq. Thinking he bbo has has plenty of low end power and not looking to twist it over 5600-5800ish. I want to keep the stock intake to work with the factory oai hood set up and for original. PB,A/C car

 

The W30 cam is 244/244 and the W31 is 232/232 duration, so it should be fine. There is improvement using an old Edelbrock 04B, and it will fit under the OAI.

 

If your cam has a 109 degree lobe separation, I don't think it will work well with the rest of your combination.

 

Ok so what would you suggest for a cam that has a rough idle, and keeping power in the middle recline at 5600-5800 max with the combination listed
my second choice was a 520/542 lift 234/244@.050 w 112ls

 

Cuz the tighter lobe sep will cause a vacuum loss at and near idle. It may not play well with your Qjet either, unless the spring etc has been changed.
Being a big block I’d do it on a 111 or 112.
Just saying.

 

I have done 108 ls with pb, with olds no issues but that was with demon carb,torker and edl. Heads.
if I got to modified the rochester not to concern. 108-110 sweet spot for the BBOlds. My problem I never did it with a stock intake,carb,manifolds

 

!09 won't work well with a restricted exhaust system.

 

^^^^^ correct.

 

I had similar ideas when I got Comp to grind me a cam with about 230I-236E at .050, mid 500s lift, 112 lobe separation for use with stock branched manifolds--or headers later if desired.

 

Unless you have data to prove your statement, I dont buy it. In 68 H/O 455 produced 390hp/500trq with 308/474 cam and the exhaust x&y manifolds with 2.25 restricted mufflers and 2 tails.with W&Z manifolds and 2.5 exhaust to tails mufflers flow 486 each should be enough for 450hp also The w30 cam had a ls 108. With the stock restricted exhaust.

 

A W-30 cam had 108 degree lobe separation? I would disagree.

 

the cam # 402569 used in 1969-1970 w30 manual trans had 108 do the research. No power brakes didn't make much vacuum but it used the restricted exhaust and made great #. Will I get more out of headers yes, but by bumping the duration on tthe exhaust it should help the restricted manifolds.

 

Well you did ask for opinions on the cam, I would listen to the free advice you seek, they no cams very well.

 

I have done a few been building all my life. My question is more on the intake working with the cam. I value peoples opinions with some facts or data to back it up versus saying nope.

 

56The cam I always used was the SpeedPro 176R which was a copy of a W-30 cam, which didn't have a 108 degree lobe separation. Curious as what kind of drag strip performance you expect from your build?

 

Hey VORTECPRO here is another company that has the w30 not sure who is the manufacturer of it. https://www.oldsparts.com/product/68-9-w-30-all-70w-30-mt-cam-with-lifters/ my bad, 108 overlap not separation so the cam is a 110ls.

 

For your information, there has been several "W-30" cams over the years. The 1966-67 W-30 cam was 308 degrees and was also used in the (Non A/C) W-45 1968 H/O. The A/C cars (W-46) used a much milder cam (285 or so degrees).
The 402569 cam was in fact 328/328 degrees and used in the 1968-70 W-30 engines.

You apparently confused Valve overlap duration with Lobe Separation Angle. Cutlassefi and Vortec were both correct.

 

yes sir and I stated that, and I apologize for that.
being correct? About 109 to much for exhaust manifolds? If you look at the responses, they just say nope, with data or a cam recommendation. Of coarse im going to question it. Im open to recommendations but it be nice to see proof why it would not work

 

I don't think anyone would waste time putting something together that will likely perform poorly to prove it. We can all sit back and let you build something that performs less than expected. You can prove to us what you got.

 

Nope not trying to prove nothing and but just to understand. Im going with a different cam . And may even go with direct fit headers if need to be.

 

What are "direct fit headers" ? Thats a term I haven't heard before.

 

well it may not be the term, but they say they fit without and mods to the pipes, alt,ps and a/c brackets . They all fit as the stock manifolds. Oldsparts.com sell them. Pop out the manifolds and Install them. It gives me an option if the manifolds are a problem .

 

Good luck.

 

I need it. This sh.. trying to keep stock parts and original exterior appearance and make hp is a pia!

 

Sounds like you're talking about short tubes. Like the kind Thornton sells.

 

yes they sell them too

 

Here are the specs of what I believed was a W-30 copy cam that I've used several times in the past.

.474 EX
.474 Int
232 @ .050 EX
232 @ .050 Int
113 Lobe separation

 

Thanks for that info VORTECPRO.

 

not always…you know this. big advertised duration is what kills idle vacuum, not necessarily big .050 duration or tight LSA

I can run 235 to 240 at .050” int on a 108 LSA in a 10:1 455 and still have plenty vac to run pwr brakes with a factory dual plane and auto car in drive. these combos usually make 11 to 12” in drive at idle

the idle is nasty and comes on the cam by 2200 . 3:23 gear and a mild converter work great.

 

Wrong again. The stock, factory W30 cam was ground on a 113lsa, not a 108 or even a 110.
Can you buy an aftermarket copy that’s ground on a different LSA? Of course you can. But they also use different, more modern Lobe profiles, which lessens the overlap as well.
And no one said it wouldn’t run, it would just run better with a wider LSA.
You've been misinformed to say the least.

 

Yep. But years ago advertised duration was done at .000 lift, not .008, like Engle, .006 like most of the rest, or even .004 like the old Crane and Erson stuff.
It’s pretty difficult to have an apples to apples comparison of the cams of yesteryear versus the cams of today on advertised duration.

 

BBLima,you got 3 guys on here that build engines for a living with proven results. You may want to heed the advice. Ultimately you will do what you want.. your choice.

 

108 lobe angle on the lift and duration comes out at a 110 lobe separation not talking about the 113 lb for auto

 

I have been building race engines for the past 30 yrs. Just never did anything with stock components and it looks like they didn't either.

 

Its funny to see all the cam specialist out here. But I have to ask, whats the fastest qrt car you have stock head ,1 carb no turbo,supercharger or Nitrous on a 68-72 Cutlass.

 

Are you asking what's the fastest production Olds headed NA full weight car, any of these guys have run? Curious what you got along these lines, if you can, post up, I like to know what's out there myself.

 

You got me excited for nothing...................................

 

I heard you got some good times on the qrt. But are they good enough to be the fastest ?Doesn't necessarily have to be a street legal just a cutlass body and at least part stock frame. Olds engine olds iron heads natural aspirated 1 carb no nos. Had or currently have. It's funny how no one is commenting anymore.lol maybe this is the wrong forum to ask for experience on stock parts makimg hp.

 

I would say, it be a hard contender to beat.

 

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