I have ordered a long block 400 sbc with a rv cam, got it to my door for just over $1700.00.
The cam info that they supplied with the motor is a Elgin pro stock E-921-P, I know nothing at all about cams so wondering what anyone on here can tell me. Numbers supplied SAE Dur 292 int./ 288 exh.. .050 Dur 224 int/ 224 exh.
Thanks for any help.

Hopefully I wil get the motor into the car today and have it running in a couple of days

 

What's the lift? What's the LSA?

 

Theres a bunch of numbers here that I don't know one from another but here they are

Valve lift: int 450 exh 460
Lobe ctrs: int 114 exh 114
sae dur: 292 int 288 ext
.050 dur 224 int 224 exh

 

it's a great cam for a EFI vehicle so that the knock sensor doesnt go crazy.


What application are you using this for?



btw, the valve lift determines how much the valve will open. Typically the higher the better, but on a lot of stock heads it dies out a little bit before .500 lift. Yours might not be taking advantage of the lift, but it is certainly better than stock!


the centerlines determine if your powerband is flat, or peaky (think a flat desert area, and then think a mountain... and that's your dyno graph for the powerband). Yours will be fairly flat but still mound around it's peak as most cars will.

The duration is big, most likely to make up for the lack of valve lift or head flow. You should be able to make some good horsepower numbers from this, but after you put the cam in you may want to check and see how many inches of vacuum you are getting, and make sure that your power brakes are still working properly.

Overall, a pretty decent cam if you want a little lope

 

That cam is not a "RV cam". It is a copy of the old 350/350HP L-46 cam from the 60's. It was also used in smog era Z28 and corvette 350's 245HP "L-82".

That was a long time ago. There are much better cams now.

The specs are 292-288 224-224 @.050 .450-.460" lift 114 LSA. It is installed 1degree retarded with the intake CL @115 deg BTC when used with a standard timing gear set.
It was designed as a street high perf cam for an 11:1 compression motor with corvette exhaust manifolds.
(1969 Corvette L-46 350/350 HP)

That cam is not well suited to a 400SB. You can do a lot better.

A Crane HMV278 is an example of a much better modern cam
grind.
A Comp Cams Extreme Energy 268 H10 is another simular example.
Either, will make more power and torque especially with headers.

A "RV cam" typically has shorter duration than either of these 204 to 216@.050.

I'd pull that cam and get a modern hyd cam more suited to your specific requirements.

You can recover half the cost of a new cam by selling it to some one who needs that cam.

It's worth your time and trouble to get the right cam on this one.

What is your specific engine/ car combination.? What are your goals? gear ratio , torque converter stall, intake manifold etc etc. What is the casting number on the cylinder heads on the 400? (under the valve cover) What is the compression ratio?

 

Thanks for all the info..
I think for now I will keep the cam in the motor and see what happens ...We managed to get the motor ina nd all ready to go late last night hopefully this morning we get the timing set and get going.
The motor is in a 82 trans am, auto trans, stock rear (as far as I know). In the next weeks I wil buy another set of headers and sub frame connecters and we knows what else at this point.

I will get the numbers off the heads later today and the company told me that it had a 9.2.1 compression.