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540 BBC HP??????????

18K views 17 replies 15 participants last post by  russ67chevelle 
#1 ·
Well guys I have sold all the SB2.2 stuff and putting together a 540 BBC and was wonder with this combo any HP ideas? Was told that I will be shocked by the guy that gave me the combo, but he won't tell me how much power it will make until its done. Its my first Big Block so looking for some guestamites..... Here is the combo:

Dart Block......... 9.8 block
Bore ......... 4.500
Stroke ...... 4.250
Rods ......... 6.385
Compression...... 13.1-14.1ish
Heads ....... Brodix BP BB-3Xtra-O 365
FLOW: int.451 exh.295 @ .800
VALVES: 2.350/1.880
CHAMBER: 119cc
Intake ........ Brodix BM 2017-O
Cam ......... ADVERTISED DUR 326/338 LIFT .804/.755
DUR @ .50 285/295 LAC/ICL 114/112
Carb .......... 1250

It will be getting the spray but wondering what do you guys think before the spray???
 
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#8 · (Edited)
With some more lift I would hope that thing could make over 1000hp easily.. especially if them headflow numbers are true. I would hope the builder aims for the higher side of the quoted compression ratio as well.

My old 565 had 357cc AFRs and a cam similar in size to that, 14:1 CR and it made 980hp.
 
#10 ·
Two seasons on the one in my brothers car, they don't have to be unreliable. Mine broke a cam, due to the core used and the way it was cut. I hope to get at least 3-4 seasons without doing anything major when it goes back together.
 
#13 · (Edited)
I got rid of the SB2 stuff beacuse of the durability. Putting the money into a BBC that will last longer. I have rebuilt the SB2 three times in two and a half seasons and tired of doing it so I decided to go BB. My engine guy said to go with that cam because it will work great and wake up those heads on the spray. Loking to hit it with 250-300 shot.

@Scott-I was told the nitrous will work good with those heads since they flow soo much. We figured we will only have to spin it to 8000...lol so with spray it should be atainable, what heads will you suggest with that cam?

@Michael- I am looking to make 1000+ HP on motor.

@Matt- I was thinking of going with these cam specs also that he gave me the choice of
Advertised Duration (Int/Exh): 322/344
Duration @ .050 (Int/Exh): 286/304
Gross Valve Lift (Int/Exh): .817/.778
which will also work good with nitrous

@c6_tt- YOU ARE RIGHT, YOU HIT IT ON THE HEAD
 
#17 ·
Just did a pump gas 555" one with std tension rings, no vacuum pump or anything, old school mid .700's lift Engle cam. Same heads and intake and made 870-880 with 740's for TQ. A *real cam* and compression will definitely help a lot. If you're going with race gas why not put serious compression in it?

JIM
 
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