Jump to content
nasa-rm

NASA National Championships

Recommended Posts

Glenn
Could/would you guys share what gear ratios you were running? If not I understand...just trying to gain some more knowledge. Our team was running a 308. I'm trying to figure out how the lower hp/tq CMC cars that were a few car lengths behind me were pulling and passing me on the standing starts. Our dyno numbers at 5900 feet three weeks ago were 247/291.

 

Dave

 

wow, 3.08's????? most guys run 3.42's-3:73's (GM) and 3.55's to 3.73's (Ford).

Share this post


Link to post
Share on other sites
Dave Schotz

My Car had 3.42 Gears in it.

 

I think a Mustang would have liked a 3.55 as a minimum. (IMO).

 

Hope this helps,

Dave

Share this post


Link to post
Share on other sites
BADVENM

We had a 3:73 in the car (I think) but before PPIR a few weeks ago found that the spider gears were broken. My teammate Scott had a 3:08 laying around so thats what we ended up using as a quick fix. My trac-lock is also needing fixing.

 

I ran 4th gear to 5000 rpm (around 124 mph on the dyno) at Miller with only a fairly short distance that required shifting to 5th (overdrive). Listening/watching Glenns videos I noticed that you could carry your gear all the way down the straightaway without having to go to an overdrive gear.

Share this post


Link to post
Share on other sites
Glenn

you are correct. 9 times out of 10 i would take the last turn in 3rd and shift just before the start finish to 4th. i was topping out around 125mph and braked between the 3 and 2 marker.

Share this post


Link to post
Share on other sites
CMC#11

David, my guess is you are leaving quite a bit on the table running the 3.08's. I know the new model Mustangs like the 3.73's but it seems like the fox's are about 50/50 between 3.55's and 3.73's.

I would guess your motor makes peak hp around 4900-5000 and it is most likely taking a while to get in that peak range.

Share this post


Link to post
Share on other sites
nasa-rm

3.73 for us. I was wondering why I kept catching you midway down the straight at the starts.

 

 

Staying in 4th was banging off the rev limiter (6200) just at the end of the pit wall into Sunset. I went to 5th a few times wishing I had a higher 5th than the .68 gear.

 

Kept running out of gear in 3rd into Windup.

 

Maybe a 3.55 would have been nice to try?

Share this post


Link to post
Share on other sites
GT4Point6

In a way, this confirms my experience with the DynoJet: it does a reasonable job of adjusting to altitude. You went from Dallas to SLC, with almost no change.

 

For some, the dyno experience was good... I'll start a new thread on it, it deserves some discussion.

Share this post


Link to post
Share on other sites
GT4Point6
3.73 for us. I was wondering why I kept catching you midway down the straight at the starts.

 

 

Staying in 4th was banging off the rev limiter (6200) just at the end of the pit wall into Sunset. I went to 5th a few times wishing I had a higher 5th than the .68 gear.

 

Kept running out of gear in 3rd into Windup.

 

Maybe a 3.55 would have been nice to try?

 

Same here, 3.73 and 5th on the main straight.

Dave, what size restrictor do you run at MMP?

Share this post


Link to post
Share on other sites
nasa-rm

50mm and it gave me 235/282.

Share this post


Link to post
Share on other sites
Glenn

the previous vid was edited wrong. try this one.

Share this post


Link to post
Share on other sites
GT4Point6
the previous vid was edited wrong. try this one.

 

"This is a private video" comes up on Vimeo

Share this post


Link to post
Share on other sites
GT4Point6
50mm and it gave me 235/282.

 

The only difference being pulleys gave me 252/290 with a 50 at MMP.

Share this post


Link to post
Share on other sites
Glenn
the previous vid was edited wrong. try this one.

 

"This is a private video" comes up on Vimeo

 

fixed it.

Share this post


Link to post
Share on other sites
Al F.

Share this post


Link to post
Share on other sites
bsim

Maybe Jeff shoulda provided the links...

 

Linky no worky for me...

Share this post


Link to post
Share on other sites
MHISSTC

I clicked on "view jeffs gallery" and I see pictures.

Share this post


Link to post
Share on other sites
MHISSTC

Ouch!

 

It WAS a nice car.

 

422.JPG

Share this post


Link to post
Share on other sites
MHISSTC

I'm finally getting around to it:

 

Thank you to all of the CMC/AI/F5 folks, all of our surrounding garage mates, and everyone else we talked to, ate dinner with, and generally hung out with during Nationals. You all made the experience very worthwhile for a couple of inexperienced first-timers.

 

Special thanks to the following:

tech garage folks - amazing efforts to get folks through quickly and checking an unbelievable amount of stuff

Texas CMC/AI and Todd - good beer, hospitality, socializing, and for coming by to introduce yourselves and making us feel welcome

Al - for getting the ironic humor in our team name and giggling every time you said it during roll call in the drivers meeting

Adam - stopping by to talk Mustangs and keeping everything running smoothly

Balingits - food and beer, great super smooth event...but we're used to all that good stuff in the RM Region

Dave T. - being my teammate and for providing the funds for the build and something to practice on before I build my own car.

Lisa (wife) - thanks for letting me be a grown up child and letting me play with my cars.

Share this post


Link to post
Share on other sites
Al F.

fixed links

Share this post


Link to post
Share on other sites
GT4Point6
GT4Point6

Lap 1 CMC Nats

Started 3rd, got a good start, Love gets a good run out of a turn and takes second place for a bit.

32 mb

http://www.margetta-racing.com/video/09cmcnatslap1.wmv

 

Misc traffic

Green flag restart after double yellow, Love goes around in turn 1, CMC2 and FFR traffic.

31 mb

http://www.margetta-racing.com/video/09cmcnatsmix.wmv

 

Vimeo versions

Share this post


Link to post
Share on other sites

×
×
  • Create New...