Tremek Car Video Forum

Memphis · 17 May 2007, 11:02 pm

Is the amount of fuel burned in 1st gear @ 5500RPM's the same amount of fuel burned in 6th gear @ 5500RPM's?

American Psycho · 18 May 2007, 04:28 am

I'd think more fuel is burned in 6th, More Incoming air/fuel ratio

Grale Guy · 18 May 2007, 04:34 am

I would think that more fuel would be burnt in 6th gear as the engine would be working harder to propel the car forward:thumpup:

01mmmz28 · 18 May 2007, 06:12 am

Hmmmm....good question. I'm gunna go ahead and say that more would be burnt in 1st gear due to the fact that the car was propelled from a stop and that the 1st gear is a power gear and the gearing is tighter in order to get the car into the powerband whereas 6th gear is an overdrive/cruising gear and has better gear ratio in 6th and the car has also been moving and would be under more inertia/forward force maybe using less gas. Then again, the speed you would have to be at in 6th gear to acheive those rpm's would be a high speed and then you would have to take into account wind resistance and that too has alot of force on the car that I would imagine would cause for more gas to be used. IDK.....Good question.

UKunt · 18 May 2007, 06:27 am

hmm id say more is 6th. as its using alot more BHP in that gear .well i think so ..

BOTLFEDLT1 · 18 May 2007, 08:06 am

This one is a no brainer;
The original poster made no reference to starting speed so we can only assume he refers to steady state operation at 5500 rpm. Drag increases with the square of speed. Obviously more fuel will be burned in in 6th by far due to the load the engine is seeing from significantly higher aero resistance.

bmxer99 · 18 May 2007, 08:58 pm

6th gear, more resistance from the wind, and overall the engine is working its ass off to keep going forward

Memphis · 18 May 2007, 09:36 pm

cool thanks for responses, now i feel dumb lol.

MCA · 20 May 2007, 07:51 am

Under WOT and X rpm the amount of fuel its the same, what its different, its the time under WOT and certain rpm.
In 6th those 5,5k rpm are there for a longer period of time creating more fuel consumption.
In other words, the fuel injection can not give more fuel than WOT is programed to at X rpm , no matter the gear or speed

Marek · 21 May 2007, 07:10 am

Im with 01mmmz28 on this one, its logical that you need more power and more juice to get moving than to keep on moving, there is less stress on your engine in 6th gear therefor you consume less.

18 May 2007, 04:28 am	#2 (permalink)
American Psycho Play with your blood Join Date: Mar 2004 Location: American Gardens Building on W. 81st Street on the 11th floor Posts: 12,116 American Psycho's Gallery	I'd think more fuel is burned in 6th, More Incoming air/fuel ratio __________________

18 May 2007, 04:34 am	#3 (permalink)
Grale Guy Senior Tremekian Join Date: Aug 2004 Location: Bristol southwest UK Posts: 1,279 Grale Guy's Gallery	I would think that more fuel would be burnt in 6th gear as the engine would be working harder to propel the car forward:thumpup: __________________

18 May 2007, 06:12 am	#4 (permalink)
01mmmz28 Veteran Tremekian Join Date: Dec 2005 Location: On a national search to find burgh a dentist that will work on baboon teeth. Posts: 4,845 01mmmz28's Gallery	Hmmmm....good question. I'm gunna go ahead and say that more would be burnt in 1st gear due to the fact that the car was propelled from a stop and that the 1st gear is a power gear and the gearing is tighter in order to get the car into the powerband whereas 6th gear is an overdrive/cruising gear and has better gear ratio in 6th and the car has also been moving and would be under more inertia/forward force maybe using less gas. Then again, the speed you would have to be at in 6th gear to acheive those rpm's would be a high speed and then you would have to take into account wind resistance and that too has alot of force on the car that I would imagine would cause for more gas to be used. IDK.....Good question. __________________ 2001 Z/28 LS1. Texas speed cam 231/237 598/595 112 lsa, .660 lift springs,7.4 hardened pushrods, lid, LT headers,TSP X pipe,Texas speed "true duels",Richmond 4.10 gears, stud kit, Thunder racing girdle cover, Spec stg 3+ clutch, ARP rod bolts, clevite main and rod bearings, 25% underdrive pulley, SLP 85mm MAF,black ZR1 rims 315/35/17 Nitto DR's, BMR subframes, BMR LCA's, Edelbrock TQ Arm, BMR pan hard bar. LS2 timing chain and gear set, LS6 ported oil pump.... Tuned by R.P.M. Performance. All labor done my ME and a few good friends !!!!

18 May 2007, 06:27 am	#5 (permalink)
UKunt Super Moderator Join Date: Jul 2005 Location: taking a DNA test to see if im the dad of 01mmmz28s kid. Posts: 15,542 UKunt's Gallery Infractions: 0/1 (100)	hmm id say more is 6th. as its using alot more BHP in that gear .well i think so .. __________________ Kirk is my daddy. i love USA

18 May 2007, 08:58 pm	#7 (permalink)
bmxer99 User is rowing away Join Date: Apr 2005 Location: Pushing a Jeep off a cliff Posts: 20,939 bmxer99's Gallery Infractions: 0/3 (300)	6th gear, more resistance from the wind, and overall the engine is working its ass off to keep going forward __________________

18 May 2007, 08:06 am	#6 (permalink)
BOTLFEDLT1 Fanatic Tremekian Join Date: Feb 2006 Posts: 974 BOTLFEDLT1's Gallery	This one is a no brainer; The original poster made no reference to starting speed so we can only assume he refers to steady state operation at 5500 rpm. Drag increases with the square of speed. Obviously more fuel will be burned in in 6th by far due to the load the engine is seeing from significantly higher aero resistance.

20 May 2007, 07:51 am	#9 (permalink)
MCA Cool Tremekian Join Date: Dec 2005 Posts: 253 MCA's Gallery	Under WOT and X rpm the amount of fuel its the same, what its different, its the time under WOT and certain rpm. In 6th those 5,5k rpm are there for a longer period of time creating more fuel consumption. In other words, the fuel injection can not give more fuel than WOT is programed to at X rpm , no matter the gear or speed __________________ MCA

21 May 2007, 07:10 am	#10 (permalink)
Marek Veteran Tremekian Join Date: Apr 2004 Location: Montreal Posts: 4,211 Marek's Gallery	Im with 01mmmz28 on this one, its logical that you need more power and more juice to get moving than to keep on moving, there is less stress on your engine in 6th gear therefor you consume less. __________________ ¤´¨) ¸.·´¸.·´¨) ¸.·¨) (¸.·´ (¸.·` ¤ roll it up and smoke it. '92 944T, 3"straight pipe+18psi=fun-'91 244DL, stock

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