I got my short block assembled(again) & can't wait to get it running...Can anybody run my combo & let me know aprox HP & Torque. The suspence is KILLING me :D

Thank you in advance...


Combo:

· 396 Bored .040 over
· 9.7 : 1 Compression
· 702 Heads with 3 angle grind, bronze guides, & hardened seats
· Speed Pro Forged Pistons (part # L-224ONF)
· Eagle SIR I Beam Rods
· Comp Cams XE274H-10 - .552 .555 / 230 236
· Comp K-kit (matching valve springs ect.)
· Harland Sharp Roller Rockers (1.7 Ratio)
· Holley 700 Double Pumper
· GM HEI Distributor
· MSD 6AL Ignition Box
· Hooker Super Comp. Headers (with jet coating)
· Muncie M-20 Tranny / 3.23 –12 bolt posi

Anyone ??? PLEASE graemlins/waving.gif

well i tryd my best at it.

didnt have your heads, but i put in some AFR 210cc's.. and i got..

459hp@6000rpms
462FTLBS@4500

at 2000 356 ftlbs

aaron

Those are small block heads,so that won't help smile.gif
The rods and rockers won't make a hp difference,and neither will the hardened seats and bronze guides..do the heads have 2.06/1.72's or 2.19/1.88's ?

Thanx for the try Aaron, alot of the stats are not nessessary, I have that combo info made up on a word doc., its alot easier than typeing it in every time ;)

Am I missing some info?? actual head castings are 3872702 (98cc's)

Sal,I'm not sure how DDD's database works for stock heads,but again which size valves do you have?

I used Canted heads, oval stock ports and valves. Also a dual plane intake, and large tube headers with mufflers. I got 435 HP. and 375 lbs of tourqe. What size valves????

Bad Rat 414 is right on the money. tongue.gif
I've got a 396 (.060 over) with the 702 heads and a Crane Powermax 278 right at the 400 hp range. That XE274 is more aggressive than mine, though.

Us 396 guys gotta' stick together!!!

Charles

Valves are 2.070 / 1.720 & the intake is a performer RPM. I will be happy if its anything over 400 HP.....Thanx guys

With those valves the tourqe dropped to around 410lbs. I don't know if the preformer intake is a single or dual plane.

Being a 396 originaly I have to speak up also. For my combo I came up with 475 HP and 475lbs of tourqe@5000 RPM. That's useing Canted oval port heads settings. I think the readings are a little high. Just a guess and say about 50 HP high.

Sorry, intake is a duel plain...

ok, that's what I used.

Bad Rat 414 is right on the money.
I've got a 396 (.060 over) with the 702 heads and a Crane Powermax 278 right at the 400 hp range. That XE274 is more aggressive than mine, though.

Us 396 guys gotta' stick together!!!

Charles Charles, are those actuall numbers, or DDD numbers???

Thanx for the input guys graemlins/beers.gif

SSal396, those were DDD numbers. The Crane 278 I have is a mild hydraulic cam that I chose for a strictly street application (I wanted smoooooth operation). :cool:

Your XE274 cam will be much more aggresive than mine due to more duration, lift, and tight LSA. You are some 25-30 HP over my 396 probably. You should be running low 13's with your combo easy.

Charles

You guys are not going to like what I am about to post, but here goes.

I have been able to calibrate DD2000 to a number of standards - mainly the cylinder head flow data.

The 408 BBC hyd cam engine combo I have set up is very similiar. I have a little less cam programed in but not that much to make a huge difference. I get 440 tq @ 4000, 388 HP @ 5000. This is using 290 heads with 2.19/1.72's with a good clean up. Comp = 9.5/1. Dual plane with large tube headers and exhaust. The slightly bigger cam might get you 15 HP. The weak part on these is always the exhaust. Those XE cams work well on aftermarket heads, but just don't have enough exhaust timing built in to make the stockers build the most power. Even so, 400HP from a 400 incher w/ less than 10.0/1 CR is still decent power.

GRN69CHV, my Crane Powermax 278 specs out at 278/290 Adv. (222/234 @ .050),.529/.525 lift, and a wide 114 LSA. I don't have any track times yet which would identify real HP output, but the extra-long exhaust timing and lift on this cam is designed to help out the weaker exhaust side especially with headers.

I would bet though that my actual power output is somewhere in the 370 - 375 range.

Charles

Too bad the 'ole 278 Crane isn't ground on a 110 or 112 LSA

67,

I had the earlier version of the 278 Powermax in a '71 454 LS5 motor about 15 years ago. At the time it was called the 272 Econopower. Same 114 LSA, we installed it at additional 4 degrees advance to help the 8.5CR. It ran real strong and had a nice lope to it in the advanced install. (I still have the timing card). My comment wasn't about the Crane cams having enough exhaust timing, but the Comp 274XE, only has 6 degrees more on the exhaust. BBC's with stock heads need a lot more on the exhaust side or they die off on the top end in a hurry - that's just my experience.
For the record, after all was said and done, I tore my motor back down and removed the roller and the single plane intake I was trying to use (it was just too much for my intended purpose and CR) and have installed the Crane 286 Powermax (286/296 226/236 .534/.553 on 112LSA) along with a port matched Performer 2-0 that I had. I am sure a lot of guys will disagree, but my own oppinion and experience is that a street car (or at least my version of a street car - which includes running A/C) needs as much power as possible with a HP peak in the 5200 - 5500 RPM range max. Although not impossible, you would be hard pressed to expect more than 1 HP/CI at that RPM range with a factory head. Unless of coure you use N20 or a supercharger.

The 408 BBC hyd cam engine combo I have set up is very similiar. I have a little less cam programed in but not that much to make a huge difference. I get 440 tq @ 4000, 388 HP @ 5000. This is using 290 heads with 2.19/1.72's with a good clean up. Comp = 9.5/1. Dual plane with large tube headers and exhaust. The slightly bigger cam might get you 15 HP. The weak part on these is always the exhaust. Those XE cams work well on aftermarket heads, but just don't have enough exhaust timing built in to make the stockers build the most power. Even so, 400HP from a 400 incher w/ less than 10.0/1 CR is still decent power. Well, although I liked the way this post was going, as stated b-4 I would be happy with anything over 400 hp, & I will definatly take the 440 tq :D

Thanx for all the replies, if anybody wants to add, or jump in---keep it comming graemlins/thumbsup.gif