IHRA hp adjustments - Page 3

1201stk · 05-18-2007, 09:25 PM

Chris I thought for sure that stuff came on only the Canadian build Fords..LOL

RocketBlock · 05-19-2007, 12:31 AM

Didn't NHRA eliminate the ram-air / non-ram-air differences years ago because racers just kept changing hoods and it was determined there was no performance difference? I've never raced a Ford with a shaker hood but I would find it really difficult to believe an "R" spec Mustang or Cougar in D/SA (10#) would go a tenth quicker with a factory shaker hood over a "Q" spec with a flat hood. I would say at 365 HP any 428 CJ will now go a tenth quicker due to the 100# weight savings and loose nothing by having a flat non ram-air hood. There is not enough frontal area to the shaker scoop opening and the Ford shaker is not positioned high enough above the hood line to make any difference.
I don't race IHRA but I would hate to see NHRA follow the lead since I race 428CJ's. They do not need a 10 HP reduction.
Minimum, if the 428's need to be at 365 HP then they need the factory cam specs brought back into play.

05-18-2007, 09:25 PM	#21
1201stk Junior Member Join Date: Nov 2001 Location: Canada Posts: 14 Likes: 0 Liked 0 Times in 0 Posts	Chris I thought for sure that stuff came on only the Canadian build Fords..LOL

05-19-2007, 12:31 AM	#22
RocketBlock Junior Member Join Date: Jan 2003 Posts: 57 Likes: 0 Liked 0 Times in 0 Posts	Didn't NHRA eliminate the ram-air / non-ram-air differences years ago because racers just kept changing hoods and it was determined there was no performance difference? I've never raced a Ford with a shaker hood but I would find it really difficult to believe an "R" spec Mustang or Cougar in D/SA (10#) would go a tenth quicker with a factory shaker hood over a "Q" spec with a flat hood. I would say at 365 HP any 428 CJ will now go a tenth quicker due to the 100# weight savings and loose nothing by having a flat non ram-air hood. There is not enough frontal area to the shaker scoop opening and the Ford shaker is not positioned high enough above the hood line to make any difference. I don't race IHRA but I would hate to see NHRA follow the lead since I race 428CJ's. They do not need a 10 HP reduction. Minimum, if the 428's need to be at 365 HP then they need the factory cam specs brought back into play.