1964 fuelie cams

[Ken Seeley]

dues anyone know what the correct lift and duration is a 64 fuelie and is it important to the proper operation of the fuelie unit.
The cam in my restoration is not correct on the end of the cam is cr7251124y92.
crane corp tell me its for a z-28 30-30 485 lift 254 dur.290 hp 302.
What is correct and how do I find one?

[William C.]

Re: 1964 fuelie cams

There was a thread on this topic a couple of weeks ago, essentially Crane is using the incorrect master for the grind as I recall. TRW and others have the correct master, and yes, the cam is important as the fuelie runs on a vacuum signal system and the "hot" cams will not work well with it. Search the archives for "Camshaft" and you should find it.

[Joe C.]

Re: 1964 fuelie cams

Ken,

Federal Mogul's Speed Pro division makes a camshaft they advertise being the same as a GM #3849346 with the 254 duration. The part number is CS118R. This is a correct reproduction of the original "30-30" cam that was originally installed in 1964-65 L76/L84, and 1969 302 c.i. Z28.
I rebuilt my 1965 L76 engine using this camshaft. Exact dupe of original AFAIK.

Joe

[Joe C.]

See The Following Website

Please read all disclaimers related to camshaft specs.
Joe 32899 bears no responsibility for any defamatory remarks made herein.

http://www.geocities.com/MotorCity/Downs/3000/cmspec.html

[Duke W.]

Re: 1964 fuelie cams

The 30-30 is a very poor street cam. I recommend the LT-1 cam to replace it. There is a TON of discussion in the archives including all the engineering analysis and dyno tests of LT-1 cammed engines.

Bottom like is that the LT-1 cam makes more low end torque and idle vacuum with about the same top end power at the 30-30. Your FI system will like the increase in idle vacuum.

Duke

[Duke W.]

And...

I will also reiterate that the 30-30 cam was discontinued in the early seventies and the GM replacement part became 3972178, which is the LT-1 cam. The Duntov cam remained available into the nineties. There's a message here.

The Federal Mogul Speed Pro clone is CS1145R.

Duke

[Mike McKown]

Re: 1964 fuelie cams

I know your question was where to find the correct cam for your engine and that was answered. Don't be swayed from keeping your car sounding original, running original and otherwise sounding like your car is SUPPOSED TO SOUND!

If you have a small amount of hand/eye/foot coordination, the 30-30 cam is a very good cam. If not, well............... Even though the 30-30 was discontinued by GM many years ago and replaced with the LT-1, the aftermarket cam grinders have seen fit to keep a ready supply of the 30-30's on hand for the mass market. There's a message here.

[John D.]

Re: 1964 fuelie cams

Joe, Glad you put that info up. The CS 118 R is a really nice replacement. The 7380 units seem to run nice with this cam. I like it a lot better than the LT1 cam for one reason. The 118R puts out more vacuum. The units run a little smoother also. By the way Joe have you hooked up a vacuum gauge to your FI to see what kind of vacuum you have. How about giving us a reading at say 900 to 1000 and then 2000 RPM. Now for the 57 to 63 FI's the CS113R is my favorite. That's what we used in my car even though I had the option of using a NOS '097. Those cams started off as being the old TRW cams-then Sealed power and now FM's. Thanks, John

[Joe C.]

Re: 1964 fuelie cams

John,

Mine is carburetted, running an original, Jerry Luck rebuilt 2818.
I know, sometimes the RPO designations can be confusing. Mine's an L76, not an L84!

If you want vac. readings, I can measure them for you. They will, of course, apply to fuel cars as well. I can say, though, that I've got my tappet lash set "tight" (.023") per Duke's recommendation, so idle vac. is a tad lower than you might expect. I agree with Duke's reasoning for the .023" setting as it applies to carburetted engines, but with F.I., one might do well to use the revised/recommended lash setting of .030". The engine idles beautifully, with that characteristic "30-30" skip. I like to idle mine @ about 850, and there, the vac. is steady, @ about 10". Setting lash per (revised) spec., of .030" will yield slightly higher idle vacuum.

Again, if you need accurate RPM/vacuum measurements, then I'll provide them for you. Just indicate the RPM readings that you want readings for. Minimum idle RPM before stall is about 650, but, if you want, I can verify that for you too.

Joe

PS:
Engine idling at 800-850 RPM, @ op temp, and I snap the primaries wide open abruptly, there is no hesitation or backfire. RPM climbs instantly and smoothly. Engine "takes the gas" beautifully, even at those relatively low vacuum readings!
Car is a pleasure to drive, and makes better than expected torque and horsepower. Dyno test results available.

[Duke W.]

Re: 1964 fuelie cams

The LT-1 cam idles at about 12" vacuum - same as the Duntov - because they both have about the same effective overlap. The 30-30 cam pulls less idle vacuum because it has more overlap. I have no doubt that a 7380 FI unit would appreciate the LT-1 cam due to the higher idle vacuum.

Duke