The American Drag Racers Affiliated Guild of Competition Acceleration Recreation
DRAGCAR TECHNICAL TIPS
One of the prime components in the DRAGCAR
formula is the camshaft, much in the way that it is in the traditional Stock
Eliminator classes. Longer duration, properly timed camshafts take the
fullest advantage of any given valve size/lift combinations being run in DRAGCAR
As valve lift increases past this point however, flow and horsepower increases
begin to diminish while the vehicle's index continues to be lowered
steadily. This begins to bring ones index unfavorably close to the actual
performance of the vehicle while the primary objective in DRAGCAR
is to in fact
get as far under the index as possible.
The other prime component in DRAGCAR is valve size. Keeping valve sizes smaller in cylinder heads which lack the capabilities for the port to fully utilize the larger valve is quite beneficial to vehicles competing in DRAGCAR. In other words, if stepping up the intake valve size by .030" only yields a 10 cfm increase in flow, it would likely be more competitively effective to stay with the smaller valve to attack the slower index.
The key component to building a competitive DRAGCAR engine is the cylinder head, just as in any other class racing venue. The difference here though is that rather than needing the best flowing (likely most expensive) cylinder head currently available for the engine block being used, the engine merely needs to be tailored around the cylinder head that is currently being used. In cases where the cylinder head does not flow quite so well, a smaller valve with fewer cubic inch displacement would be the favorable combination.
Carburetion is also an area where one can find extra advantages to remaining conservative. As throttle bore size is incorporated into the indexing formula, some engines will find index breaks when running smaller carburetors. If the index break is a full 2 tenths of a second while the vehicle performance only falls off by a tenth, then the smaller carburetor is certainly the preferred choice as it would run further under index.
"Bigger is not always better" is a very true cliché in DRAGCAR.
Running a bigger engine, bigger carburetor, bigger valve and/or bigger camshaft
than what the cylinder heads can fully utilize only serves to lower the index
beyond that which would be optimal for the racer.
DRAGCAR PROTEST PROCEDURES
does not currently
mandate post race teardowns on a regular basis, reasonable suspicion inspections
and racer initiated protest procedures may be executed.
Any racer refusing to comply with the protest inspection will forfeit all season qualifying and race points accumulated as well as 66 percent of all monies awarded at the event of the protest filing, and the protesting racer shall be refunded the full protest fee.
In the event that the protested racer's vehicle is found to be correct as claimed on their technical data sheet, that racer shall receive the full protest fee as compensation for parts and labor. Said racer's protested vehicle shall also be exempt from any future protests for a period of 6 consecutive months so long as his/her under index performance does not exceed that of any single quickest run during the event at the time of protest by over 1/2 of one percent of that racer's current index.
Example: Protested racer's index during the event at which he/she was protested was 11.10 and their best posted E.T. during the event was 10.697.
11.10 - 10.697
= Under Index Performance .403
This protested vehicle is exempt from protests unless it's under index
performance exceeds .459 seconds, meaning that if while still running on an
11.10 index at a subsequent event during this 6 month period and it runs as
quick as 10.641, no racer initiated protests will be executed on this vehicle.
NOTE: Considerable atmospheric conditional changes will be taken into consideration in any event that this may have had an impact on performances being better than those allowed for in the protest policies stated here.
In the event that the protested racer is found to be racing an incorrectly claimed vehicle, that racer shall forfeit all qualifying and race points awarded at the event in which the protest took place as well as 33 percent of all monies awarded at this event. Their vehicle index will be corrected according to the inspection data and their under index performance will be established based on the corrected index. This racer's vehicle will now be exempt from any future protests for a period of 6 months as long as their under index performance does not exceed that of any single quickest run during the event at the time of protest by over 1/2 of one percent of that racer's current true found index. The racer initiating the protest will be refunded the full protest fee in this instance as well.
NO More BREAKOUTS!
Real Drag Racing is Back with American DRAGCAR!