I've been thinking about cams for a '94 3.4L V6 Camaro engine with about 9:1 CR. The engine won't be going in a Camaro, but in a non-computer car weighing about 2100#. It'll have a carb, headers, and dual exhaust. The trans gears are 2.95, 1.94, 1.34, 1, and .63. It has 24.3" tall tires and a 3.91 rear end.

I've only seen two cam companies offering solid grinds for the V6 and I think they're probably lacking in the bottom end.

Then I returned to TC and its valuable search function and entered "097 Duntov". Everything I read made me happy.

I really don't know, but I just feel it - this has to be the right cam.

Any thoughts, pro or con, on this?

UDHarold, I read about your "modern" Duntov cam more than once. If you happen to see this I'd appreciate it if you'd list the specs if you have time.

Thanks.

Can't help you with the 097 cam, but both crane and comp cams makes cams for the 60* v6's, and all of them seem to be small, low end type of cams. We're going with one of comps grinds for my friends 3.4L hes putting in a 2.8L fiero.

Here are a few specs on the 097 cam:

Chevy 3736097 ( intake lobe )... Chevy advertised dur is 287 deg... lash @ .012.

Lobe Lift ,...... Duration......

.008 ____________ 288
.010 ____________ 278
.012 ____________ 272
.014 ____________ 267
.016 ____________ 264
.018 ____________ 261
.020 ____________ 258
.050 ____________ 228

.012" is the correct lift to measure the seat duration (272º).

there is no problem grinding a solid lifter cam for any V-6, as long as cores are available---Some Ford V-6s are hard to find.
I have 2 cams I use as 097 Duntov replacements.
The 256F is 256° at .020, vrs 258°, and 225° at .050, vrs 228°. HOWEVER, the Duntov has .398" valve lift, and the 256F has .454", and a .014" lash. It has .050" more NET lift than the 097 Duntov.
The 264F is 264° at .020, vrs 258°, but then it is 232° at .050, vrs 228°, and .470" gross valve lift. The lash on the 264F is .016" hot. It nets about .064" lift over the Duntov.
Both of these cams will go a year or longer between valve lash, and make more power across the RPM band than the Duntov.

UDHarold

bored&stroked,
I'd like to know how the Fiero swap turns out - should make a big difference.

Pat,
Thanks for the specs. As typical with some stock Chevy cams it's hard to find two sets of specs which match. I have a book which list two specs for that cam - I think it's because of the extra long ramps that some Chevy cams appear to have much more duration than comparable cams.

Harold,
Thanks for your modern Duntov specs. Will the 256F work well with 9:1 CR?
Do you think it have less bottom end than the 097?
I saw where Lunati (have you heard of them?) makes a "Nostalgic" 097, p/n 20109 for the sbc - they spec the rpm range at 1800-6200. Does your 256F have about the same?

Thanks.

The specs (along with a couple others) were sent to me by a guy who measured them very carefully. To find the correct lift that a cam's seat times should be measured at, "Divide the lash by the rocker ratio and add .004"." The .004" is for valvetrain compressibility. Chevy's ridiculously long durations are a direct cause of the .050" standard used today.

Originally posted by Glenn1018:
bored&stroked,
I'd like to know how the Fiero swap turns out - should make a big difference.

I saw where Lunati (have you heard of them?) N/P. Hopfully this 3.4L should make the fiero a 13 second car smile.gif

And harold now works at lunati, thats where you have to order UD cams from now on.

Pat,
I came across that site yesterday or the day before after putting "097 Duntov" in a search engine. I also remembered running across your DCR program while I was searching. It's on the same page, empire.net/pkelley...I have it bookmarked now.

bored&stroked,
I've read that Harold's with Lunati now - it was meant as a joke. I called Lunati and spoke briefly with someone about lifters and having a cam ground. He said no problem, as long as the oiling groove in the lifter is in the right place.
I was checking out some p/n's by Lunati, Crane, Crower, and Isky to see if the 60* V6 uses a lot of special stuff and it looks like a few sbc parts will work on the V6 - solid lifters, springs, retainers, valve keepers. I did notice that Lunati uses 71817 for a sbc hyd lifter and 71218 for the V6, but their 70992 solid may fit both. Crane uses the same hydraulic and solid lifters for both engines - maybe they missed something.