MILD THUNDER

Winter is here. Who wants to play? Heres what Im thinking.

Tim Full Forces 540 combo. I'll make a dyno simulation of his build, and I will list 10 different catalog hydraulic roller profiles. Each guy gets to vote on which one they think will win. No other changes to the engine, except the cam.

Question is, we must define win. Lets say its a 6,000rpm limit. Do we want the winner to be defined by , peak HP, Peak torque, best average power? Avg power between 3k to 6k, 4k to 6k, 5k to 6k?

Winner gets a small prize. Just something for fun to do. I can post the dyno sheets from each cam when its over. No right , no wrong , just a computer program , nothing to take serious .

ok. I got a list of cams. All hydraulic roller obviously.

First three, are Lunati.

A: 240/245 112 LSA .612/612 lift

B: 245/250 112 LSA .612/612 lift

C: 250/255 112 LSA .629/.629 lift

Next eight cams, are from Crane.

D: 236/244 110 LSA .610/.632

E: 236/244 112 LSA .610/632 (infamous 741 cam)

F: 236/244 114 LSA .610/.632 (525EFI cam)

G: 240/248 112 LSA .621/632

H: 242/246 112 LSA .632/632

I: 244/256 114 LSA .632/.632 (popular "651" cam)

J: 248/256 114 LSA .632/632

K 254/262 110 LSA .680/.680

Next two from Howards

L: 251/257 110 LSA .629/.629

M: 253/259 110 LSA .657/640

Whoever picks the cam that makes the most average power and torque wins. I will post all the results from each test. We can then discuss which cam might be best for different things, but this is simply best average power from 3500-6000.

This is a 9.5:1 540ci, with AFR 325 CNC chamber heads, single plane high flow intake, and 1050 CFM carb, with large tube headers. Only thing changed will be the camshaft in the model.

offshorexcursion

Average HP and Torque between 3500 and 6000

MILD THUNDER

I'm thinking just using Cranes hyd rollers. Mainly, because A. they have a large selection. B. They give enough data about the camshaft, such as seat duration, .050 duration, timing events, and so on. If you want it to be fairly accurate, that prob be best comparison.

sutphen 30

what happens if it doesn't go to 6000 rpms.

MILD THUNDER

it will still show in the avg power . or you mean in the boat?

getrdunn

Agree. That's where it's all at.

MILD THUNDER

Ok. Avg is set from 3500-6000.

getrdunn

I think he was referring to the minimal hp gain 5,500 - 6,000 in tims

mike tkach

throw a 525 efi cam in the mix.

articfriends

While your at it do a dyno sim for my next project : 8.5-1 548, open plenum ported intake, 2200 cfm throttle body, cncd afr heads that flow 420 intake and 300+ exhaust, no accesorys, dyno headers w 32" primarys 2 1/4 dia, 15" collectors. Im starting with a cam i own thats too big but going to run it anyways, with solid rollers, (hyd roller grind) 252/259 at .050, .390 lobe lifters 114. Tell me what cam would be more ideal and peak at 6000