might be fun

Grumpy

The Grumpy Grease Monkey mechanical engineer.
Staff member
This weekend, I went to the Lands End Hill Climb conducted by the CO Hill Climb Association.

I went to the racer's meet and noticed a mid-engine open-wheeled "car" w/a LS1 motor in it.

Well, on practice day it died about 35 seconds from the end of the course (at the Eagle's Nest)and I helped push it off to the side (that was a bad split (set of runs) as I also pushed off a Ford PU and they sent the tow-truck after another). I held off and didn't quiz the driver on her machine as it would cough/sputter while ranking, and then die... she was sorta upset.

But, she said that it was a 5.4. I noticed that it had lots of "Lope" and a 102mm throttle body.

Now, here is the Q...it had about 2' of pipe added on to the collectors. What sort of dif would it make to the power-band?

Now, it has since occurred to me that it may be a safety mod., as the fuel-cell is in the center, like this

https://www.facebook.com/photo.php?fbid=1579580108...

Now, here is the oddity...about 10 minutes after the break-down. Lorie tries her car again...nut-N, and possibly the driver of the Ford PU says, "Where does this yellow wire go to?" (It had a spade connector and it was dangling just below a pair of relays and a fuse-box). He tilted his head up-side down and saw an open slot and slid it back in and she ran like a top (she had gas again).

sounds like the power electrical lead to the fuel pump vibrated loose and disconnected , one reason that water resistant electrical connectors are commonly used rather than spade tip connectors

http://garage.grumpysperformance.co...-auto-elecrtrical-connectors.3105/#post-68805

http://garage.grumpysperformance.com/index.php?threads/setting-up-your-fuel-system.211/
femalewpcon.jpg

malewpcon.jpg

7501414.jpg


7501618.jpg


https://www.delcity.net/store/Weather-Pack-Assembled-Pigtails/p_810525.h_810527

the combo of header primary inside diameter and header primary length plus the collector length will have an effect on where the engine torque peak and rpm band but I think in this case it was lengthened to allow the exhaust pulse to exit behind the car rather than reflect next to the body which would reduce the annoying sound in the car, at wide open throttle because a 2" extension would change it less than 100 rpm
dirtr.jpg

btw that looks like it would be a lot of fun to drive if it weights what I think it might and has the potential power range I,m very sure I could build into that LS engine.
BTW any idea what rear differential and transmission are being used??
any more close and clear pictures showing the frame, engine, suspension or info on building a similar car?
 
Last edited:
Back
Top