How Much Power Does a 347 Make?

[BMad]

I'm a bit early, but I'm going to rebuild my 1969 302 this winter. While I was in there, I figured I'd go with a 347. She's all ready punched out .030, she would most likely only need a hone, bearings and a good bath. I'm currently running a Edelbrock airgap manifold with Edelbrock performer RPM aluminum heads. I would stick with the cam (.496 lift)

 

[svtnotch]

Depends on your combo. Mine made 375 rwhp i have 9.4:1 compression ratio afr 185 custom cam. [ame="http://s430.photobucket.com/albums/qq24/spdtrip/?action=view&current=notchdyno.flv"]notchdyno.flv video by spdtrip - Photobucket@@AMEPARAM@@http://vid430.photobucket.com/player.swf?file=http://vid430.photobucket.com/albums/qq24/spdtrip/notchdyno.flv@@AMEPARAM@@vid430@@AMEPARAM@@430@@AMEPARAM@@qq24/spdtrip/notchdyno[/ame]

 

[PJB]

One of these days Id like to get mine on a dyno.
Ive got World Windsor Sr heads, an Edelbrock Performer intake (FI) and a Comp cam with .579 lift.

I know its got a hell of alot more power than the H/C/I 302 that used to be in the car.

 

[dsblk93gt]

With what you have already I'd guess mid 300's at the wheels, 340-350ish. The cam is the deciding factor really, go with a custom grind and you will see more power. That and maybe a roller conversion which will get you some more power as well. My father always liked solid lifter cams in his race cars but it is a PITA for a street motor.

 

[1990_LX]

There are a lot of variables to be considered before you can get a close guess....more info is needed.

 

[BMad]

Thanks for the reply's. The car/engine is strictly strip. The combustion chambers are around 58cc. She has a 496 lift 290° duration cam with roller tip rockers. 1969 c4 built by A to Z Transmission 2500 stall, I'm likely to go with a 4000 stall. Mallory unilight Distributor. PJB .579 lift!!! wow, did you have to fly cut the pistons? Dsblk93gt, funny, I was under the impression that a roller conversion was a PITA. I've allways ran flat tappit cams.

 

[sbeachstang]

My Wife's car is a 331 with roller 540 lift cam with perfomer heads and runs consistant 12.00s with an occasional 11.90 in a 2950 car with driver c4 3500 stall and 3.73s w/ 26 tall tire. Soon to be replaced with 347 with 195 Canfields and 608 lift CI camshaft.

 

[Tonytone]

no one can guess power.. for instance look at this.. a 331 that put down 415rwhp...
http://www.hardcore50.com/vbulletin/showthread.php?t=54090

a 347 that didnt put over 400 down.. http://www.hardcore50.com/vbulletin/showthread.php?t=55057

 

[dsblk93gt]

No, but it should be at least 340-350 since most H/C/I on a stock bottom end are just over 300rwhp. Too many variables...

 

[dsblk93gt]

BTW...I really like that 2nd one...really sleeper looking under the hood!!

 

[BMad]

Thanks again for all of the replies, I was just looking for a ball park figure to see if it would be worth building a stroker. Also, I figured that it would be good to get a few opinions from people that have experience with strokers.