Race Class for 4-Stokes

[98Slim]

Pls help Need to know generally what classes the following 4 strokes sleds should be catogorized with:

RX1 / Apex
FX Nitro
Vecor

AC Jaguar

SD 1200 XR 4Tec

FST Polaris

Local Drags Races in Marathon NY Feb 7th

Thanks Folks Darren

 

[Bakemono]

The RX-1, Apex, FX Nytro and FST should race in 800 class.
AC Jag (assuming it not a turbo), Doo 1200 and Vector should race in 600 class.

 

[Race_blue60]

FX Nytro runs 600 classes and up, apex runs 600multi and any other multi pipe classes it wants...same goes for the RX-1ton and the Vector is home in the 500multi and other multi classes...fst run 700 or 800 i know my buddy has an 08 dragon turbo its a 750cc 4stoke with a turbo that dynos at 140HP, it has a feature called "over boost" for 4 seconds after you grab a hand full youre given 162 or 164 HP but thats up to you....all other sanctioned races base it off this

ISR CLASSIFICATION FOURSTROKE ENGINE stock 600 classes Engine layout- In-line 3 cylinder without driveclutch gear reduction
Minimum stroke-66mm
Minimun Displacement-1050cc
Minimun filed weight-440lbs
Maximum carb bore-40mm(for flat side design, no butterfly)
Maximum FI throttle body bore-42mm(uses butterfly valve in bore)
Maximun Compression ratio-11.8 to 1

the 1200 4tec has stroke of 60mm and displacment of 1170cc whch makes it larger than the nytro also the power-weight ratio on the nytro is less compared to the larger # of cc's to the lighter weight of the 4tec...bigger #'s on lighter chassis , should move ...i havent seen one on the track yet but cant wait when one pulls up next to me

 

[FLYBYU]

apex turbo runs 800 imp