mpg's:how many are you getting?
09-13-10, 01:49 PM
#51
88 FC 13B NA
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well i guess im one of the few that gets 25-26 mpg as long as i granny the hell out of it , 21.8 if i beat a quarter tank out of it i try not to drive to crazy though
09-14-10, 05:28 PM
#55
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Even driving conservatively I usually get around 17-18... 19.5 if i really stretch it.
However freeway only (downhill most of the way) over like 350 miles I averaged just over 25 MPG.
However freeway only (downhill most of the way) over like 350 miles I averaged just over 25 MPG.
10-26-10, 05:40 PM
#59
Over the last four years and 56k miles, my N/A FC has averaged 17.4mpg in the city and 25.1 on the many highway jaunts.
Getting really close to 200k on the motor.
Sadly- for the FC at least- the V-8 swapped FD is averaging 22mpg in the city (no highway trips yet), which means that when the rotary blows, it goes.
Getting really close to 200k on the motor.
Sadly- for the FC at least- the V-8 swapped FD is averaging 22mpg in the city (no highway trips yet), which means that when the rotary blows, it goes.
01-12-11, 02:49 AM
#71
rx7 almost a religon
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just got an app, and it says i'm getting 9mpg street. i've put about 700 miles on the new engine and filled up gas 6 times. (full fill up every time)
01-12-11, 03:23 PM
#72
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6-8 in town spirited driving, and 14-18 hwy depending on speed I am driving at, no cruise control. Heavily modified 13bre cosmo engine with 1000cc primaries and 1600cc secondaries, in my opinion not to bad for how much fun the car is do drive.
01-12-11, 04:10 PM
#73
Over the last four years and 56k miles, my N/A FC has averaged 17.4mpg in the city and 25.1 on the many highway jaunts.
Getting really close to 200k on the motor.
Sadly- for the FC at least- the V-8 swapped FD is averaging 22mpg in the city (no highway trips yet), which means that when the rotary blows, it goes.
Getting really close to 200k on the motor.
Sadly- for the FC at least- the V-8 swapped FD is averaging 22mpg in the city (no highway trips yet), which means that when the rotary blows, it goes.
Refresh me on the driveline on the FD-LS1 LT1? Auto Manny?
Ive been thinking for a long time about a nice LS1 auto combo in my Vert...
01-12-11, 05:10 PM
#75
talking head
about 14 MPG in US terms for propane/butane LPG
or about 12-15 $AUS for every 62 miles ( 100 km ) price on the day depending
be aware that british imperial and US gallons are different things
here is a repost i have made form an LPG forum discussing relative economies compared to petrol and the reasons that may be
or about 12-15 $AUS for every 62 miles ( 100 km ) price on the day depending
be aware that british imperial and US gallons are different things
here is a repost i have made form an LPG forum discussing relative economies compared to petrol and the reasons that may be
3.785 L = 1 US gallon
4.546 L = 1 british imperial gallon
1.61 Km = 1 mile
100 km = 62.11 miles
250 - 300 RWHP 13bt rotary engine fitted with impco 225 feedback system
17 L per 100 km highway
22 L per 100 km city
blended LPG price is 55 to 70 AUS cents per litre
same engine fitted with 2 x 550 primary injectors and 2 x 1000 secondary injectors and run to one bar boost
demand 98 ( RON ) octane petrol at $1.30 to $1.50 $AUS per litre
( perth western australia )
and would typically go 280-350 KM per 60 litres
= 17.1 L per 100 km highway
= 21.4 L per 100 km city
in US terms
LPG
17/ 3.785 = 4.5 US gallons per 100 km ( 62.11 miles )
= 13.8 MPG
22/ 3.785 = 5.8 US gallons per 100 km
= 10.7 MPG
98 RON petrol
17.1/ 3.785 = 4.5 US gallons per 100 km
= 13.8 MPG
21.4/ 3.785 = 5.7 US gallons per 100 km
= 10.9 MPG
================================================
in british imperial terms
LPG
17 / 4.546 = 3.74 UK gallons per 100 km
= 16.6 MPG
22 / 4.546 = 4.84 UK gallons per 100 km
= 12.8 MPG
98 RON octane petrol
17.1/ 4.546 = 3.76 UK gallons per 100 km
= 16.5 MPG
21.4/ 4.546 = 4.71 UK gallons per 100 km
= 13.6 MPG
from this you may be able to work out
rotary engine with petrol must run around 11.5 :1 mixtures up around 1 bar boost
whilst the same engine is quite happy with leaner LPG mixes at this boost
---- LPG's inherent atomisation/ homogeneous mixture and also higher octane are coming to play
- hence the nearly 1 to 1 economy ratio independent of the 25% losses in BTU
i can run 14/15 : 1 mixtures under 1 bar boost with LPG
but with petrol must maintain 11.5 ( +/- 0.5 ) to 1 mixtures
else 14:1 under boost at 1 bar on petrol would amount to a dead engine come start of day 2
( NEVER run a petrol rotary lean under boost )
looking at the price of the fuels,, i have a 50% reduction in operating cost
and a large improvement in emissions
note LPG at lean mixes = low CO and low hydrocarbons but high NOx,,
rotary engines are inherently low NOx , but high CO and hydrocarbons
--- and so they complement each other ----
with few vices beyond the fact at 300 RWHP
i am on the limit of the model E convertor and not far off the tank safety valves limit
LPG rotary FTW
4.546 L = 1 british imperial gallon
1.61 Km = 1 mile
100 km = 62.11 miles
250 - 300 RWHP 13bt rotary engine fitted with impco 225 feedback system
17 L per 100 km highway
22 L per 100 km city
blended LPG price is 55 to 70 AUS cents per litre
same engine fitted with 2 x 550 primary injectors and 2 x 1000 secondary injectors and run to one bar boost
demand 98 ( RON ) octane petrol at $1.30 to $1.50 $AUS per litre
( perth western australia )
and would typically go 280-350 KM per 60 litres
= 17.1 L per 100 km highway
= 21.4 L per 100 km city
in US terms
LPG
17/ 3.785 = 4.5 US gallons per 100 km ( 62.11 miles )
= 13.8 MPG
22/ 3.785 = 5.8 US gallons per 100 km
= 10.7 MPG
98 RON petrol
17.1/ 3.785 = 4.5 US gallons per 100 km
= 13.8 MPG
21.4/ 3.785 = 5.7 US gallons per 100 km
= 10.9 MPG
================================================
in british imperial terms
LPG
17 / 4.546 = 3.74 UK gallons per 100 km
= 16.6 MPG
22 / 4.546 = 4.84 UK gallons per 100 km
= 12.8 MPG
98 RON octane petrol
17.1/ 4.546 = 3.76 UK gallons per 100 km
= 16.5 MPG
21.4/ 4.546 = 4.71 UK gallons per 100 km
= 13.6 MPG
from this you may be able to work out
rotary engine with petrol must run around 11.5 :1 mixtures up around 1 bar boost
whilst the same engine is quite happy with leaner LPG mixes at this boost
---- LPG's inherent atomisation/ homogeneous mixture and also higher octane are coming to play
- hence the nearly 1 to 1 economy ratio independent of the 25% losses in BTU
i can run 14/15 : 1 mixtures under 1 bar boost with LPG
but with petrol must maintain 11.5 ( +/- 0.5 ) to 1 mixtures
else 14:1 under boost at 1 bar on petrol would amount to a dead engine come start of day 2
( NEVER run a petrol rotary lean under boost )
looking at the price of the fuels,, i have a 50% reduction in operating cost
and a large improvement in emissions
note LPG at lean mixes = low CO and low hydrocarbons but high NOx,,
rotary engines are inherently low NOx , but high CO and hydrocarbons
--- and so they complement each other ----
with few vices beyond the fact at 300 RWHP
i am on the limit of the model E convertor and not far off the tank safety valves limit
LPG rotary FTW