Not just 409S
- Thread starter BSL409
- Start date
Your '64 Bel Air 9 passenger wagon with a 409/340 fits in I/S (stick) or I/SA (auto) at 4,250 incl. driver. NHRA index is 12.20 in I/S and 12.30 in I/SA. My pal Jim Marshall holds the I/SA record at 10.93 @ 118.41. The I/S (stick) record is currently at a Minimum 11.70...which means it can be set by anyone that can run faster than that and go through the certification process.
The motor in it currently is a 434 stroker with 690 heads and 881 Don't think I can get past tech with that. I would have build an entirely different motor for that application. Might be a future goal. Do those numbers account for Factory A/C as well? I just know I will have to loose 100 lbs myself to get the scale with me in the car to around 4250lbs.
Where did you get your numbers? I found some different numbers last night looking around the Western Central NHRA site.
Here 'ya go.
http://www.classracerinfo.com/CGPage.aspx?MFR=Chevrolet&YR=1964&MAKE=Chevrolet
Your car is at 11.94 lb/hp with the 340 horse engine. You can move up or down one class from it's 'natural' class. In stock, the weight breaks are in 1/2 lb increments and you can move to the minimum in each weight break. So, your car is a natural 11.94...you can run at 11.00, 11.5 or 12.0 lb/hp. 'G' is 11.0 lb/hp (3,740 + 170 for driver = 3,910), 'H' is 11.5 (3,910 + 170 = 4,080) or 'I' at 12.0 (4,080 + 170 = 4,250).
Local guy, right here in Mo CA. Has a reputation as a very hard-working guy and a very solid driver. Pretty damn impressive and I hear a rumor it's in the 9.40s now...Uh.... not quite.
Car has to weigh 3,450 lbs with driver for A/SA if he runs it as the 410 horse version and 3,530 lbs. if it's the 420 horse. The 'R' on the windshield indicates a National Record run attempt. Mr. Wann set the record on this run at 9.65 @ 136.30 mph. Bad, bad race car and a savvy racer.
Have they relaxed the rules in stock class racing to allow cylinder head porting?If not thats what's impressive getting that kind of power thru a set of stock castings.35-40 years ago I thought porting was taboo in stock class racing and was under the impression that was true in super stock also but maybe I was misinformed.
So you are saying I'll have to wrestle with the heavy kids.
No porting allowed in Stock. NHRA has port volumes published for intake and exhaust ports. In Stock Eliminator you have to have the same valve lift as the engine came with, original intake manifold, factory carb(s), stock valve size and original style pistons. You can replace hydraulic lifters with solids if you like.
In Super Stock, you can weld/epoxy and port the heads.
413/426 have the same 3.75 stroke but obviously bigger bore on the 426. It’s almost scary to think how fast that fella would be going with a ‘63-4 car with the 426. I wonder what advantage(s) we’re missing about why he selected a ‘62 413 car.
It has a lot to do with the NHRA factored horsepower. The '62 413/410 is factored to 390. The '63 426/415 is factored at 409 hp. If the engines dyno 10 hp apart (for example), the 413 would come out ahead.
I think it Bryan's new build.
Vintage aircraft or boat.
Very early aircraft engine I wish I could remember the details on it. Brian can enlighten us really cool story.
I think that was it