road & drag race combo Ive seen used successfully

grumpyvette

Administrator
Staff member
one of the local guys I know, stopped by to B.S. about his car and engine. HE likes to compete in some rather interesting club racing, where they put up a few dozen traffic cones out in a large local parking lot , in an industrial area on week ends (private property one of the members of the club owns) and have the guys race each other for best lap times, its usually a course designed to maximize the requirements on the cars handling and acceleration, braking and ability to turn sharply. they then go out to the local track, and drag race the cars for times but to get points in the club competition the racing around the cones has a much higher point value and on that course I seriously doubt the cars exceed 60 mph most of the time as the course is specifically designed to make rapid changes in direction, and precise direction control, of the car, not just speed the main factor in winning, yet its brutally fast acceleration and high g load braking that gives you the main advantages, and certainly high hp to weight ratios are required to win the drag races


so theres this one guy whose driving a fairly light weight 1967 camaro with this 377 cubic inch engine and a manual transmission, with a 3.73:1 rear gear and a lot of suspension work has come to dominate the club races, the car easily runs low 12 second times on street style tires , and the cars occasionally street driven.
The engines power curve virtually requires the engine stays in the 3500rpm-6500rpm range to make power but its darn impressive to drive or ride in the car when he drives it like he stole it! the engine just seems to pull hard from about 3800rpm to about 6500rpm, and performs rather well as a muscle car engine provided you can ignore its lack of power and drive-ability below about 3000rpm.
BTW if you build a similar engine ID suggesat building it as a 406 with the longer 3.75" stroke you'll get noticeably more low and mid rpm torque with very little, if any loss in peak power

http://www.crower.com/camshafts/chevy-2 ... d-cam.html
CAM
crower00330.jpg


http://www.summitracing.com/parts/edl-2892
intake

http://www.profilerperformance.com/raci ... -23-degree
210cc heads

http://www.summitracing.com/search?keyw ... 1211&dds=1
dart block

http://www.speedwaymotors.com/light-for ... 32469.html
350 crank


10.5:1 compression with 70cc heads

750 double pump holley carb.

http://www.pbm-erson.com/store.php?catId=24
1.6:1 erson roller rockers
8 quart canton oil pan

I don,t have all the data required to get the DD2000 to predict the exact combo but it would result in a similar power curve to this engine, notice the power in the 3500rpm-6500rpm range

crowercam377.jpg
 
The 28 to 38 year old in me @ 43 now still likes big long duration camshafts.
You do give up alot of lower RPM torque on the street.
But when its time to play hard or race, there is a distinct advantage.
3.90 gears with a 26" or 27 inch tall rear street tire radial is a must below 455 cubic inches & long duration style race cam on the street.
 
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