Here is my intended combo: (cam still not definite)
454 (bored.030)
TRW-2399F30 .095 dome pistons
"781" oval port heads with 2.19/1.88 valves
Ultrdyne hydrailic cam (288/296 dur advertised I assume, .550/.575 lift) don't know lobe seperation, but assume 110 deg
roller rockers
Performer RPM intake
Performer 800 cfm carb
1.75 to 3" Summit headers
M-21 4 speed
10:1 compression
rear end will be 12-bolt posi w/ .373 gear, maybe .411

Thanks for all the help everybody. We're almost there graemlins/thumbsup.gif graemlins/waving.gif

btt :rolleyes:

only 3 hours.. dont need to bounce

http://www.musclelogic.com/slpin/temp/temp123.JPG

Alan,

How did you get the images into a jpg.?

One thing to comment on, change the big tube headers with mufflers to small tube headers with mufflers. Believe it or not according to the program, even 2" primaries should be small tube

Tom

i use microsoft paint, but i have windows xp, so i can save it as jpg

http://www.musclelogic.com/slpin/temp/temp1234.JPG

Thank you very much Alan & Tom for the great info.
:D
Looks like I am getting very close to my 500Hp+ goal. Any suggestions to get the other 25+HP to get there ? graemlins/thumbsup.gif

Sorry about bouncing so soon..... :rolleyes:

Sorry to hijack your thread. But could you guys dyno my combo too?

355 ci
Vic Jr. Intake ported to double humped 202 heads
Solid Tappet Cam (cant find exact specs on cam, but around .600 lift)
Solid lifters
Roller Rockers
Dynomax Headers
2.5inch exhaust with Cutouts after headers
Holley 750cfm Carb
11:5:1 compression
3spd Auto Tranny
10bolt posi, 3.73 gears

Thanks in advanced! graemlins/waving.gif

Summit piston ad page says 8.94 compression with that piston. I have a 454 with the hyper pistons with .95 dome and 781 heads and was wanting to know the difference in HP from 8.84 to 10.00.

Can anyone dyno it for me???

Looking closer, I noticed that the dyno runs were based on an exhaust with mufflers. Do you think I would get the other 25+Hp with uncapped headers ? I am also planning on doing some porting on the heads. What HP increase might I expect from that ?

Thanks again y'all graemlins/waving.gif

John,i have read from well known enging builders that it's easy to get an additional 25hp on a BBC from doing a good pocket porting job on large oval port heads.

So i would think with a mild port job & open headers (not mufflers as used for dyno simulations) your at the desired 500hp + mark.

Scott

Thanks Scott, I will be talking to my machinist about doing just that this week. graemlins/thumbsup.gif

That engine is fairly close to mine. I run a Crane Hyd. roller with .610/.630 lift, 234/242 @.050. I have a mild port on my 781s and an 850 Holley. Dynoed at 543hp,563ft/lbs tqe. I think with a bowl clean up you will be there,(500 hp range). Mine was dynoed through mufflers. It made a little less hp than the above #s with when I put on my 1&3/4 in. headers. The above was done with 2in. Supercomps. I didn't do any tuning after I put on the 1&3/4s.I think the hp was still there. The torque was 500ft/lbs+ form 3000 to 6000 rpm. I bet yours will be very close to mine. Those UD cams are a hot ticket, it will probably out do my Crane. If I hadn't got the cam with the engine, I would have used Harold's product.

Originally posted by phel69:
Those UD cams are a hot ticket, it will probably out do my Crane. If I hadn't got the cam with the engine, I would have used Harold's product. Thanks for the input Bob. I contacted Harold today by e-mail for his recommendation and am waiting for a reply..... ;)
Those dyno numbers are what I'm looking for and it seems like I'm in the ballpark now. Like you said, some porting/polishing and the right cam and I should have a very nice combo. graemlins/thumbsup.gif