I was thinking of getting the hydraulic version for my 327....They have a blueprint spec. cam for the 327/350HP.....The duration is 222/222 degrees with a lift of .447/.447.....What would the advertised duration of this cam be?.....And, does this cam have a decent lopey or choppy idle?

mild maybe moderate choppy (depends on each persons ear:D). I helped install this VERY SAME cam from bullet cams in a friends 350 blazer 4x4 and I put 1.6's on the intake and true 1.5's on the exh and it performs really well. You can ...almost...hear a small choppy idle. Duration would be close to 270 or so.

Ron!! here ya go!!!!!!!!! click on the video's

it's the L79 cam..

i have that EXACT CAM in my 1963 nova ss convertible in a .030 350cu in...


also in my wagon 327 cu in .030 over with stock ex manifolds and 3 chamber flowmasters and L79 intake ....

nice cam!!!!!!!


http://i25.photobucket.com/albums/c74/1963wagonman/wagon/th_100_6195.jpg (http://s25.photobucket.com/albums/c74/1963wagonman/wagon/?action=view&current=100_6195.flv)
http://i25.photobucket.com/albums/c74/1963wagonman/wagon/th_100_6194.jpg (http://s25.photobucket.com/albums/c74/1963wagonman/wagon/?action=view&current=100_6194.flv)
http://i25.photobucket.com/albums/c74/1963wagonman/wagon/100_3713.jpg

According to the Chevrolet Power 4th edition bookletI have in front of me, the 383151 crankshaft duration figures are as follows::: Lash Point 320 degrees .010 tappet lift 264 degrees and .050 tappet lift 221 degrees... Doesn't really come out and say "advertised duration" but I guess this is the way Chevrolet wrote their specifications back in the day... Under the remarks column it say: Used in Hi-performance 327 RPO L-79
Good torque - excellent power... Remember this GM cam, required a certain compression ratio, i.e. heads and pistons or it might seem dead until 2500rpm.
Maybe the new Crane #151 version has different valve opening and closing points not the same as the original GM unit... Best to ask a Crane rep. giving him ALL the specs. you have, and, exactly what you want from your TOTAL setup... Safer this way and if something is not right after purchase, you might, repeat, might be able to go back at them.... T.

Yes, I already spoke with a Crane rep., Cranes part number for this cam is #967601 and the grind number is #3863151....This cam is an exact replacement for the factory L-79, 327/350 H.P. My 327 is built to L-79 specs.....This is a hydraulic cam, with a duration @ .050 of 222 degrees and an advertised duration of 306 degrees, ground on a 114 degree lobe separation angle, the valve lift is .447".....The RPM Range is 2000-5600 rpm....The Crane rep. stated that it will have decent vacuum for power brakes and also a moderate choppy idle, which is what I want.....Whoever built my motor, before I bought the car, made a very bad choice in camming it!......The motor is only pulling 7" Hg of vacuum and it has a very, very choppy idle, like a race engine!......I had the initial timing @ 15 and it still fouled my brand new spark plugs and smelled of richness!.....I bumped up the timing, which appears better, but now I need to clean the plugs because they are fouling, making the engine pop out the exhaust!.....I'm going to clean the plugs for the last time and as soon as I hear any backfiring out of the carb or the exhaust or if I smell that rich smell, then I will purchase this Crane "Blueprint" cam.

In my infinite wisdom, one of my buddies sold me an old Cam Dynamics cam with 244 degrees on both sides at .390 and 410 lift on a106 lobe center. This was installed straight up and was a "Cheater stocker" cam of the 70's... Son a mah gun sounds great at 700 rpm but not much in the way of vacuum like you - 7lbs.. Put this in a 350ci with stock 4 valve relief slugs with 882 heads and guess what!!! A slug down low alongwith with heads that stop flowing @ 3800 - 4000 rpms.. Be interesting to see what duration at 050 you have in the installed cam... I have been fighting the rich gas smell also... Jets / power valves / vaccum guage / low float settings and sooner or later I have to change heads (camels are sitting) and get rid of my Weiand Excellerator single plane (w/o the divider plate). Have such a hard head that I don't wanna give up on the cam but, maybe it is time to get a newer model cam and get rid of the frustration once and for all... Be interesting after you get the Crane repro (151) installed to hear what you think of it and what your heads and intake are ...
T.

Another cam to consider if you're looking at GM blueprint type cams is the Melling part no. 22210 cam. It's a copy of the 3896962 cam used in the Hi-Po 350 Z-28, LT-1 & L-82. Just a hair bigger than the L-79 cam.

Specs. are 224/224 @ .050 .450/.460 lift 114 LSA

I had one in my 327 and it pulled pretty hard to 6k. Lopey idle and decent mid-range.

Mark

Advertised duration is 306/306. You can basically group this with all 60's GM hi-po cams that are "non-modern" cams. Should make it easy to run 91 octane fuel. I bet the 152 cam was for the vette guys who did not want the lash the 30-30. Sounds good wagonman.

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

I was thinking of getting the hydraulic version for my 327....They have a blueprint spec. cam for the 327/350HP.....The duration is 222/222 degrees with a lift of .447/.447.....What would the advertised duration of this cam be?.....And, does this cam have a decent lopey or choppy idle?
it will have a noticeable idle I would say. My cam is a hydraulic same degree but with .450/.460 lift. Sounds very nice :D u should be happy with it depending on what mufflers u choose. :thumbsup:

Yes, I'm also curious as to what cam is in it now!....Hopefully it'll have a grind number so I can do a little research.....I also had to install a 3.5" power valve because the stock 6.5" was triggering the idle circuit, due to low vacuum!.....I'll probably have to go back up with the power valve if I get the Crane cam.....Even though I don't know what kind of work was done to the heads, I do know that they are castings #3890462, 64cc chambers, large camel humps, no accessory bolt holes, however, I don't know if they have the 2.02/1.60 or 1.94/1.50 valves.....The motor came with a nice aluminum, low rise, Edelbrock TM-1, single plane intake and I also have an Edelbrock "Performer" intake which I'm currently running now.....If I get the cam, I'll probably install the TM-1....I know after I bumped up the timing, that richness smell went away, so maybe it'll be OK after I clean the plugs.....That's terrible that you have to open the windows while you're driving and take a shower after you're done because that rich smell lingers on your clothes and hair, not to mention, you have to fight to keep your eyes open while driving!....That truly sucks!

Another cam to consider if you're looking at GM blueprint type cams is the Melling part no. 22210 cam. It's a copy of the 3896962 cam used in the Hi-Po 350 Z-28, LT-1 & L-82. Just a hair bigger than the L-79 cam.

Specs. are 224/224 @ .050 .450/.460 lift 114 LSA

I had one in my 327 and it pulled pretty hard to 6k. Lopey idle and decent mid-range.

Mark


Yes, my brother and I were just discussing this cam the other day, matter of fact, he's looking for the cam specs to give me, so thanks for the info.....My brother had a 78 "Silver Anniversary", L-82 Vette, which he sold last year, so I know exactly what that cam sounded like!.....Thanks again for the heads up!

The old -962 should be this..

3896962 Hyd. - 222/222, .450"/.460" – 115/114 - 350 L-46, L-82.

I daily drove the old -151 cam in my stock, about 10 to 1 L-48 engine, 1200 miles from new and it pulled like a freight train from 1st until the top of 3rd!!

And it would pull 5500 rpm in 4th gear w/ my M-20, 3.31 posi and about 29.5" tall tires!

pdq67

I daily drove the old -151 cam in my stock, about 10 to 1 L-48 engine, 1200 miles from new and it pulled like a freight train from 1st until the top of 3rd!!

And it would pull 5500 rpm in 4th gear w/ my M-20, 3.31 posi and about 29.5" tall tires!

pdq67


That's excellent man!:yes::thumbsup:

I jumped on Mellings website and they also have the L-79 cam available, PN #C-400-P or #22200.....Auto Zone has it for $72.99!

Here is a GM valve event comparison of the 151 and 962 GM cams...
151 intake opens 40 B4TDC and closes 100 degrees after BDC
962 intake " 40 " " 100 "
151 exhaust " 92 B4BDC " 48 " after TDC
962 " 90 " " 50 " "
Duration @ 050 for the #151 is 221 degrees both sides
" #962 is 224 "
151 cam point of max lift 110 / 118 maybe >>>> difference is here...
962 cam " " " 114 / 114

My gosh they look similar... Lift difference is minimal with .003 and .013 B'tween the 2
cams.... PDQ what would happen if an #097 was installed with 882s and 8:2 to 5 cr in a 355ci??? Would the cr come up by an earlier closing intake by 28 degrees as compared to the int. closing points of the above 2 cams at 100 degrees??? T.

http://www.geocities.com/MotorCity/Downs/3000/cmspec.html
A little different that what you quoted. It is all here.

Chevrolet Power 4th Edition Section 2 - pg 17 ... is what I went by... Even Doc Cobine states he went by Chevrolet Power in his intro, he couldn't have because of the above.
Something is obviously amiss, maybe a misprint, but, who??? I'll go onto CRG and see if they have something definitive.... T.

Chevrolet Power 4th Edition Section 2 - pg 17 ... is what I went by... Even Doc Cobine states he went by Chevrolet Power in his intro, he couldn't have because of the above.
Something is obviously amiss, maybe a misprint, but, who??? I'll go onto CRG and see if they have something definitive.... T.

I doubt there is anything at the CRG website. Those 2 cams were not used in 1st gen Camaro engines.

Chevy Power has been know to be wrong!

I honestly don't know about the -097 in a low compressioned 350?

I would definately try it tho just to find out!!! And I bet it would run fine...

pdq67

Chevy Power has been know to be wrong!

I honestly don't know about the -097 in a low compressioned 350?

I would definately try it tho just to find out!!! And I bet it would run fine...

pdq67I have this cam in my 74 short wheel base full size truck. Here are the stats. Engine is 355, hedders, performer rpm intake, holley 750, smogger 882 heads. This thing hauls the mail dude. Has a light chop while cold but warm you can still tell its there. Very fast truck. I am going to do vortecs on this thing.

Mike,

The old -097 solid lifter Duntov cam, right, in the 350..

Great to hear b/c I always figured it's pretty-much a dandy of a little solid lifter cam regardless of engine size!

And I will say that I ran it in my old junk301 DD for quite a while and w/ new points, it would go 7,500+ rpm!!

I'd run 1.6 ratio rockers on it nowadays just to up it's low lift some is all!

pdq67

Did not want to keep the thread hanging on the valve event specs so I went over to CRG and asked the question and even though it was not a Camaro installed cam, sometimes, guys over there will come back with very useful info... Not this time though as the intake opening valve event that was quoted over there at "1 BTDC" not correct...
Anyways, I tried, as the info out there as Gary L. stated is not always correct... T.

The cam timing specs, tappet @ .050, for the Crane "Blueprint" cam (PN 967601), which is a factory replacement for the L-79, 327/350 HP are as follows:

Intake opens: 1 BTDC Intake closes: 41 ABDC
Exhaust opens: 49 BBDC Exhaust closes: (7) BTDC

These are the specs from the CRG Board that I thought were wnong!!! 1 degree B4 TDC just doesn't seem correct. Now we have Crane+CRG / Chevy Power Manual / and Doc's valve event numbers.. Who knows? T.

Try here.

http://www.21cgt.com/FMWebCatalog/default.htm

PN CSR 1095R

291/224/287/224, 114/???, .450"/.460" lift.

pdq67

Here it is again.

cam timing (www.geocities.com/MotorCity/Downs/3000/cmspec.html)

Here it is again.

cam timing (www.geocities.com/MotorCity/Downs/3000/cmspec.html)


If you notice, the cam specs aren't listed @ .050" (See the note #5).....Crane's specs are @ .050" which explains the difference!

Yuppers, that is the difference @.050... Thanks guys!!! T.

I am running this cam in my 68 camaro with the 327 and vortec heads it is a pretty decent cam, not much lope at all but makes good power till about 5200 so for a pretty stock motor it is not bad.