Just wanted to know which cam would make more low end power Crane CRN-343901 or Lunati LUN-00053LK 223 duration and .514 lift and what would the idle be like. Its going in a 360 .040, headers, accel ignition, Performer intake and holley 750. thanks for any help

 

i would go for the crane 901 that seems to work best in FE's and its pretty well like normal idle, i dont know much about lunati cams but iknow a lot of people run the crane 901 and are happy with it, i think its ur best bet. good luck

 

thanks for the help I'm lookin for a bit of a lopey idle so i dont know where to began. crane sounds like a good choice though

 

how about the crane 941 i believe thats got rough idle and good strong low end torque but thats the biggest you will want to go with out changeing rockers, good luck

 

sounds good I'll look into it thanks alot

 

Whats the difference between the crane 901 and 904? Also how does the Edelbrock performer 2106 compare to those and the 941?

 

I do not see a 904 listed for an FE?

The Lunati is a single pattern, probably not the ticket with stock-ish heads.

I think you are going to find that the performer and 901 have a smooth idle. They are not very aggressive cams. The 941 is also going to be a good idle, maybe just a hint of cam sound if it idles for a while.

My truck has an 801 in it and it is far from lopey.

With the exception of the Lunati there has been a lot posted about these cams here. It would be worth a search.

 

When you go to the www.cranecams.com and look under the truck power catalog for the FE it lists the 904 as thier recomendation. The specs look like a 901, but the 904 is listed as a new part, does anybody know what's the difference?

 

Ahh, I see what you mean. They appear to be exactly the same camshaft to me the spec cards are identical. I imagine the packaging is the only difference.

 

The 904 is their 901 cam packaged into a kit of some sort. When Crane puts a cam in a kit they change the last number. For example: A crane 343801 cam packed with a set of standard lifters becomes 343802.

 

Yep, 901 with lifters is a 902, looks like a 902 with "TruckPower" on the box is a 904.

903 must be a "TruckPower" box with no lifters.

 

Guys is it the brand name or part number that give you the lopey sound or high performance probably not. would it not be better to talk about the geometry of cams vs brand names and part numbers? No offence to be be given I am just making a comment.

 

We are very familiar with the 901s cam specs here for the most part Cory. That is why it is being talked about like it is. I can understand how someone could be scratching their head though. The 901 has a smaller duration and bigger lift than the Lunati mentioned in the first post. It should be a good bit more efficient but won't make as much high end power. The Crane 901 seems to be a great cam for a mild FE. Nobody has been disappointed yet.

Crane 343901 cam Specs:

Adv. Duration: 260/272
.050 Duration: 204/216
Lift @ valve: .501.533
Lobe Sep Angle: 112 degrees.

I would call this cam Crane's version of an improved stock cam. Just a tad bigger and a whole lot better.

 

You start to get "lopey" when the exhaust valve closes after the intake valve opens. The "overlap"... the more radical the cam, the more overlap. The more overlap, you start to lose initial intake flow, which ruins idle and low end. The bigger the overall duration for each valve, the closer they get, until the "overlap"... the overlap also makes more hydrocarbons during an emissions test, too much raw gas getting into the exhaust.

I'm no expert, but I understand the basics... 12 years ago, I used a Wolverine (which was bought by Crane, apparently), so I have no idea about Crane or Lunati or anyone else...

The point is, when I was setting up my motor, I was looking for the most radical hydraulic I could find. I found one, that was 292/292 advertised duration, 230/230 @ .050" (where the flow really starts, which means this value is VERY important), and .554/.554" lift.

The first thing you'll notice is that this cam has the same timing for exhaust and intake. This is because I used the larger CobraJet exhaust valves which meant I didn't need a longer exhaust duration, which meant I didn't get a lot of intake/exhaust valve overlap (or at least, not as much as required for a stock C8AE/D2TE head).

The result is I have a slightly crappy idle at 900RPM, which was helped with a lot of initial advance (18-20 degrees at idle give 11 inches of vaccum if I'm lucky) and an MSD 6AT multispark, and a HECK of a lot of low-end torque and pulls decent to past 6000 RPM...

My machinist degreed it in, and then advanced it 4 degrees, because he knew I needed the low-end, and he said it would help with the high compression I would have... good rise in torque from idle to around 5500 RPM, never dyno'd though.

Edelbrock Performer 390, Holley vac-sec 750, long-tube matched-length headers... 10.5:1 TRW forged pistons, block decked square, heads milled, he figured it was just under 11:1

With some old BFG 33x12.50R16.5's and some decent tread on them, it's real easy to spin the tires trying to start in 2nd with my 435NP... 93 octane of course...

 

http://www.compcams.com/Technical/TimingTutorial/

Is a very good resource for understanding camshafts.

http://www.cranecams.com/camvtfaq.htm

Is also worth a read.