I Need Help With A Math Problem

[Larry Hill]

A good friend of mine has a heads up in Stock second round. So for fun I looked at the HP rating of his competition. Much to my surprise the 1970 Camaro 350/360 in Super Stock was de-rated from 360hp to 325hp 12/19/02. I know the AHFS was in affect at that time and according to the rules: a competitor my have requested a reduction in Hp rating. The scale for reduction was based on the year’s previous runs by that combination. The reduction was written as 1.25% if the fastest run was quicker than -.165 under the National index and the class average was below -.550. If the quickest run was -.115 to -.164 under the reduction was 2.25%. So to receive a 35 Hp reduction using the 2.25 % I believe the start Hp would have to be 1555hp. Would y’all mind running the numbers to check my math. And for example a 15 Hp reduction on an engine rated at 420 the start Hp would have to be 666 Hp. I wonder how all this happened with the AHFS in affect?

[tommy d]

Wouldn't the 420hp example have started out around 480 hp? I'm on par with Jethroe Clampett math wise though.

[junior barns]

If what you say is accurate about hp reduction then you are correct, 360hp at 2.25% should have received 8hp reduction not 35. been that way for 20 yrs Watched this race earlier and if not for a red light itwas going to be a close race! What does that say about the car's hp in the other lane? Both cars are fast and a LITTLE under factored!!!!! LOL

[MR DERBY CITY]

Larry, you don’t have a math problem …Your problem is Pat C ….If you need HP off a combo contact Jim Hale for help…he can work miracles….

[Billy Nees]

Originally Posted by MR DERBY CITY

.If you need HP off a combo contact Jim Hale for help…he can work miracles….

Yeah, the 383 and 426 Street Wedge got about the same amount of "welfare".

[james schaechter]

Originally Posted by Larry Hill

A good friend of mine has a heads up in Stock second round. So for fun I looked at the HP rating of his competition. Much to my surprise the 1970 Camaro 350/360 in Super Stock was de-rated from 360hp to 325hp 12/19/02. I know the AHFS was in affect at that time and according to the rules: a competitor my have requested a reduction in Hp rating. The scale for reduction was based on the year’s previous runs by that combination. The reduction was written as 1.25% if the fastest run was quicker than -.165 under the National index and the class average was below -.550. If the quickest run was -.115 to -.164 under the reduction was 2.25%. So to receive a 35 Hp reduction using the 2.25 % I believe the start Hp would have to be 1555hp. Would y’all mind running the numbers to check my math. And for example a 15 Hp reduction on an engine rated at 420 the start Hp would have to be 666 Hp. I wonder how all this happened with the AHFS in affect?

Both of those cars have the ability to punish the index at will. I think it will depend on who wants to spend some of that hp today.

[Dave Casey]

This is just one example among many across all brands that this has happened to. It was over 20 years ago by Larry's info,, so who knows. This particular engine is the original LT1, 360 in a Camaro and 370 in a Corvette, in 71 they had less compression and were 320 and 330 if my memory is correct. I believe that the stock and SS rating may have been both lowered at the same time. There are some running in both stock and SS.

[B Parker]

Being a performance person, these races are ones I look forward to seeing. Jerry and Andrew have been great drivers for a long time. Too bad Jerry just barely missed the tree. It would have been interesting two really fast cars. Runs like these should be more the norm. Great to watch and guess who will win on that given day. It's too bad the AHFS the way it is written now for me has ruined a big part of Stock I enjoyed. Now almost everyone is trying to go .65 to .85. under. Sad to watch !! I don't get it. BP

[Mark Yacavone]

Mr Hill doesn't seem too worried about it, running 1.01 under , and putting himself in the hp pool this morning.
Keep it up ,and maybe the 400 Pontiac, with NO aftermarket heads will catch up a bit.

[Larry Hill]

The point of the post was how does a combination receive a reduction of 35 Hp in Super Stock using the rules as written wit a maximum of 2.25%. The starting Hp would have to be 1555 Hp X 2.25 %=
34.9875 rounded up 35 Hp reduction. How does that happen and how did it happen on a 420hp reduced to 405 Hp.