I posted this in the road racing/autocross forum but didnt get hardly any bites. So I have decided to post it here because of the extensive knowledge of posters that frequent the all motor forum... and it is N/A


http://cms.scca.com/documents/Club%2...%20GCR/FCS.pdf

there's a chart of approved engines on GCR 168 - 169 (pages 4 and 5)


IN THAT CHART

Make --------------Req.'d Restrictor-------- Weight
Honda B-16A (4-valve) --n/a---------------- 1160


NOTE: Add 25 lbs for sequential transmission
NOTE: Add 25 lbs for fuel injection (except Volkswagen)


motors are pretty much unrestricted except displacement cannot really be changed.. 1615cc MAX

The Bad news:

A.3. Transmission
a. For all types of transmissions, no more than five forward speeds
and an operational reverse gear shall be used.
b. The use of an automatic gearbox is prohibited.
c. All gear changes shall be initiated by the driver. Mechanical gear
shifters, direct-acting electric solenoid shifters, air-shifters and
similar devices are permitted. Electronically controlled differentials
and devices that allow pre-selected gear changes are prohibited.
d. Gearboxes with shafts that are transverse to the longitudinal axis
of the chassis are not allowed. The sole exception are the gearbox
final drive (crownwheel) shaft axis and final drive shafts (half
shafts). All change gears must be located in the case aft of the
final drive.

Is this why u dont see B16a's in Formula Atlantic??? custom gearboxes arent cheap

what are other options besides Xtrac?(and the obvious adapter plate tranny conversions)



Formula Atlantic is limited to 1615 cc's (1.6L) hence why i think the B16 would be a GREAT choice for it because the head can flow quite a bit.

Maybe a B16 in a 1200 lb car wouldnt need the small Vtec lobes and would sacrifice them for a lighter valvetrain (more RPM)? (vtec killers... solved)

maybe theres a better block thats allowed with a better geometry (high R/s) or a bigger bore than 81mm?(displacement's limited so RPM becomes much more important than torque, especially in a light car... TQ x rpm x omega = HP)

maybe theres a head in the list that can be modified to flow more than a ported b16 head?
(300 + cfm is a shitton for a 1.6L lol)

I just find it hard to believe there is another 1.6L on that list that can outperform the B16 on most of these fronts

81 x 77.4
1.74 R/s Ratio (pin could probably be moved even higher)


EDIT: D16's are also allowed... and a bit lighter i do believe.

 

we did this almost 6 years ago. Made all the adaptors for a Swift DB4 and a RT4. Installed one engine in a CSR /RT5 chassis. Not much interest then or probably now. Los of little things, intake and ex. on opposite sides, lots of block machining (cutting off where the bellhousing goes) switching to engine rotation is not a big deal.

 

SORRY TO PICK YOUR BRAIN but ....

intake and exhaust on opposite sides of the head....or opposites sides of what is IDEAL?

What trans did it use? Are there none available that rotate so you dont have to reverse engine rotation. I thought that was mainly a FWD transverse issue, but then again i've never fooled with custom transmissions

couldn't use an adapter plate for the trans?

got any Pictures???

VTEC KILLERS?????? 11k? spill the beans don F...i knew u would answer my thread

 

You use the trans that is in the car a hewland or whatever. Yes you need a n adaptor plate, the body work has to be modified for the IN and Ex. the throttle cable needs to cross-over from left to right. Then of course a custom valve cover so it ties into the chassis, a custom dry-sump pan to tie into the swift chassis.

 

Valve cover attached to the chassis??? Doesnt seem like 8 10mm bolt would hold much

or did u just have to modify it so that it sat within the bodywork

Do you have any pics? thanks for the info

i thought i was going to be an innovator for once

 

What kind of whp are you guys looking to roll in FA?

 

usually FA engines are about 250hp @10-11k RPM. at least the 4A-GE's were

 

I seen one of these cars in don's shop years ago.. pretty sweet seeing all the fabrication.. imagine what a 300whp 2.2ltr would do in that chassis and yes i understand its not in the rules it would be like a large go cart with torque..


shawn

 

atlantic motors ran around 30K. small clutch packs. among a host of other things. if you are on 4ag and some searching you can have the specs on the 4a-ge. I think they were using the 20v motors.