351 C 2bbl History ??
 

I'm curious how this engine started @ 164 hp and is now factored @ 240 hp. I see a 72 165/350 chev with more compression & a slightly bigger carb is between 224 - 230. I know I have the bigger ports/valves with the cleveland but I'm not finding that advantageous. I know of one person who tried the 351c 2bbl route but he couldnt run the numbers. Has somebody run this succesfully to get the # to 240 or was this just an NHRA "THING"? :rolleyes:

Re: 351 C 2bbl History ??
 

It received it's 240 rating based on an "overrated" gross rating from the late 60s and early 70s. When the manufacturers went to a net HP rating in 1972? it put NHRA in a position of having to assign a realistic number to these combos so they looked at the nearest gross rated combo that they could find and rated them from that.
On a lighter note, they are a lot more receptive to giving these combos back HP than they have ever been.

Re: 351 C 2bbl History ??
 

So, if I ask nicely they will show some love to the 71 Boss that's at 355 now?:)

Seriously, no block, no crank, Chinese rods, when everybody else get the aftermarket good stuff?

Re: 351 C 2bbl History ??
 

Bill,
I think this is the car that put the hurt on that combo BUT it was a while ago.

8. Rob Youngblood, Nampa, Idaho, D/S '71 Mustang, 10.698 (-1.102)

He races a Vette now.

Re: 351 C 2bbl History ??
 

Billy,
Did some research. The 71 is the same engine rated @ 240 in both sides of the classification guide. The 70 has a little more cam, carb, & compression & is @ 250. I dug out an old old Motor's manual & looked up the 70 & it also had it rated @ 250 @ 4600 & torque was 355 @ 2600. Since apparently Ford had this thing (71,72) @ 240 do you think NHRA will go below that ?

Re: 351 C 2bbl History ??
 

Bill, I doubt it!

Dave, yup.

Re: 351 C 2bbl History ??
 

Worth a try. Thanks.