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Search took 0.05 seconds. Search: Posts Made By: gumby79
Forum: Aerodynamics 02-07-2021, 02:37 PM
Replies: 150
Views: 16,256
Posted By gumby79
Cd Time is not so much a factor in throttle...

Cd
Time is not so much a factor in throttle stop testing. Only top speed achieved and MAINTAINED with the Artificially reduced max power.

How long/ min test time. 2-3sec at peak to verify you...
Forum: Aerodynamics 01-31-2021, 05:09 PM
Replies: 24
Views: 2,664
Posted By gumby79
Sorry, Wikipedia disagrees , wing fences are...

Sorry, Wikipedia disagrees , wing fences are perpendicular to Gurney flaps , and developed for use on swept-wing aircraft that suffer from full span stall. Basically a full cord Vortex Generator....
Forum: Aerodynamics 01-23-2021, 03:11 PM
Replies: 150
Views: 16,256
Posted By gumby79
This is a common mod on 1st and 2nd gen Cummins/...

This is a common mod on 1st and 2nd gen Cummins/ rams . They use it for high idle insted of stedy state cruse. Due to no computer to program in a high idle for warm ups(obviously not on eco modder )
Forum: Aerodynamics 01-23-2021, 11:45 AM
Replies: 24
Views: 2,664
Posted By gumby79
Gurney flap only applies to Wings ok ,what is the...

Gurney flap only applies to Wings ok ,what is the proper technical term to describe a gurney flap shaped protrusion on a Leading Edge attached wing AKA spoiler?
Why does the rule book for...
Forum: Aerodynamics 10-02-2020, 12:04 PM
Replies: 11
Views: 1,041
Posted By gumby79
OSB(Old Square Body) for the win. Agreed...

OSB(Old Square Body) for the win.

Agreed that other one looks like it's got a lift kit, lol.
Forum: Aerodynamics 10-02-2020, 11:52 AM
Replies: 23
Views: 4,197
Posted By gumby79
Looks oddly familiar!!! ...

Looks oddly familiar!!!


https://ecomodder.com/forum/attachment.php?attachmentid=29254&stc=1&d=1601656792

- 40-50 is the norm for this truck( Isuzu Pup/s-10 and D50/Mighty Max) with the 2.3l...
Forum: Aerodynamics 05-27-2020, 02:36 PM
Replies: 24
Views: 2,795
Posted By gumby79
Edgarwit's Are a prime example of a WOG( wing...

Edgarwit's
Are a prime example of a WOG( wing in ground effect.) Your front and rear fenders appears to lack the roughness you refer to being present preventing such research from applying to your...
Forum: Aerodynamics 05-26-2020, 06:29 PM
Replies: 24
Views: 2,795
Posted By gumby79
In order to understand automotive air dynamics...

In order to understand automotive air dynamics one must throw out most of what know of airplane aerodynamics and only consider WIG(Wing In Ground effect) aerodynamics

This team took the NACA...
Forum: Aerodynamics 05-20-2020, 03:23 PM
Replies: 141
Views: 24,504
Posted By gumby79
https://www.car-revs-daily.com/wp-content/uploads/...

https://www.car-revs-daily.com/wp-content/uploads/old/2014-Renault-Eolab-Concept-21.jpg
The rear is impressive as well. The active aero air- curtains to help rezolve the wake off the rear...
Forum: Aerodynamics 05-19-2020, 01:15 AM
Replies: 940
Views: 326,281
Posted By gumby79
https://ecomodder.com/forum/attachment.php?attachm...

https://ecomodder.com/forum/attachment.php?attachmentid=28221&stc=1&d=158986503550mph Rear air flow on a dirt road with 20mph constant true head wind out by the Bonneville Salt Flats.
This is...
Forum: Aerodynamics 05-13-2020, 11:16 PM
Replies: 141
Views: 24,504
Posted By gumby79
Appears a single bolt in the center through an...

Appears a single bolt in the center through an aftermarket center cap press fit into to the wheel.
Forum: Aerodynamics 05-13-2020, 05:57 AM
Replies: 141
Views: 24,504
Posted By gumby79
It's that the number one rule is testing is...

It's that the number one rule is testing is required, ABA is preferred, backed up with long turn tank to tank results .

Everything is a suggestion and requires testing to determine if it fits...
Forum: Aerodynamics 05-13-2020, 03:42 AM
Replies: 141
Views: 24,504
Posted By gumby79
Cool . Show me a land speed record holder where...

. Show me a land speed record holder where cutting .002 CD is a huge gain that can cost $10,000's in r&d that is running a Tesla/ insight style wheel.
Or is the .002Cd gains from this style of...
Forum: Aerodynamics 05-11-2020, 05:28 PM
Replies: 20
Views: 4,341
Posted By gumby79
Yes, Ford tractor Gray Implement paint is almost...

Yes, Ford tractor Gray Implement paint is almost a perfect match for Dodge White.
A side view
https://ecomodder.com/forum/attachment.php?attachmentid=28131&stc=1&d=1589230395
(Sometimes computers...
Forum: Aerodynamics 05-11-2020, 01:38 AM
Replies: 20
Views: 4,341
Posted By gumby79
A new roll pan bumper/2 turn / brake lights and...

A new roll pan bumper/2 turn / brake lights and one turn only, 2x6"flush mount LED , and 3"4x1w recessed backup lights..
The new bumper incorporates 7 1/4x20 both old holes or terminating the belly...
Forum: Aerodynamics 05-07-2020, 02:27 AM
Replies: 70
Views: 52,589
Posted By gumby79
I stand corrected.

I stand corrected.
Forum: Aerodynamics 04-29-2020, 04:10 AM
Replies: 276
Views: 39,104
Posted By gumby79
Insted of .33% go .447%=12.01", 2nd hand store...

Insted of .33% go .447%=12.01", 2nd hand store kid bike to go scale, or go full scale with 26"ers if you wanted trunk space you could use 12" pop up tent trailer tires for the front. Then when you...
Forum: Aerodynamics 04-28-2020, 11:13 PM
Replies: 276
Views: 39,104
Posted By gumby79
Shopping cart becomes aerodynamic body

You could build it like arrowheads Spirit of ecomodder model used bicycle wheels in the short-term put the birdcage over the top of it and as Julian said spandex with a paint to stiffen it or shrink...
Forum: Aerodynamics 01-25-2020, 12:11 PM
Replies: 1,084
Views: 256,666
Posted By gumby79
Quite impressive on the math. 1350lbs is...

Quite impressive on the math. 1350lbs is definitely worth 12mpg.
---
Regear
Re gearing/trans swap had a 16mph effect on top speed. 87.14mph with 2.44:1 final Vs. 103 with 2.16:1 new top gear....
Forum: DIY / How-to 01-16-2020, 09:34 PM
Replies: 26
Views: 5,682
Posted By gumby79
10mm it's what I used to create the internal...

10mm it's what I used to create the internal structure of my nose cone using a heat gun I was able to bend it into oval shape. Extremely Ridgid Id say 60lbs centered on a 3 'span perpendicular to...
Forum: EcoModding Central 01-09-2020, 05:11 PM
Replies: 42
Views: 4,896
Posted By gumby79
Trans temp?

With my 6sp(7 counting TC lockup) Allison, 145°f to enter learning mode. Per the Trans Builder keep it above 145°f to keep it alive and adjusting the shift trims for current conditions.

Dodge...
Forum: EcoModding Central 01-09-2020, 02:26 PM
Replies: 43
Views: 6,935
Posted By gumby79
Well done I see more progress. The rotating...

Well done I see more progress.
The rotating mass reductions you have pursued add up to ~60#, I'd venture to guess equates to ~500-1000# of static weight reduction

Non EGR CR Cummins duse not...
Forum: Aerodynamics 12-28-2019, 12:41 AM
Replies: 12
Views: 1,775
Posted By gumby79
He was there last year.

He was there last year.
Forum: Aerodynamics 12-27-2019, 03:06 AM
Replies: 88
Views: 11,861
Posted By gumby79
I'd love to throw a 10.5" 14bolt with 3.08 gears...

I'd love to throw a 10.5" 14bolt with 3.08 gears Detroit locker and disk brakes, if you could send me a link to a sorce For the gears.

85 with 3.08, 31.7" tires , is 1693 in 6th gear,(.61) 1971...
Forum: Aerodynamics 12-21-2019, 07:02 PM
Replies: 88
Views: 11,861
Posted By gumby79
This is what I skeched about a month ago for...

This is what I skeched about a month ago for minding the rules .
Use an extended cab short bed. This wluld alow moving the seat back to give me some leg room . Then mod the floor to form the duct...
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