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Triumph TR6 - Miles Per US Gallon

I have a 1975 TR6 with dual Strombergs and a Stebro dual exhaust. My MPG seems to be about 14.5. Is this about avg?
Alasdair

Alasdair,
I did a trip of 207.1 miles last weekend on 37.2 liters, mostly highway. Dual SU HS6's, Pertronix standard exhaust. That works out to 25.29 mpg (Imp). At 0.91 cents per liter the drive cost $33.87 Can. (I think I got that right...)
Fill in the blanks at the link - http://www.euronet.nl/users/grantm/frans/fuel.html
Have fun,
Steve

Steve Crosby

I HAVE 72 TR6; STROMBURGS, K&N FILTERS, FALCON EXHAUST, ALLISON IGNITION, HAYDEN ELECTRIC FAN AND GET ABOUT 25+MPG CTY/HWY. I'D GET MORE ON HWY.
skikir

You know there are at least 3 more gears you can use. All joking aside. I get around 24mpg with the overdrive.
Mike
S.M. Stephano

you guys must be going downhill. I only get about 18mpg(us) dual stromberg, 4 speed, stock '72
Paddy
Paddy Kan

> 21 mpg (us), standard '72 with double strombergs.

I'm goning to install the pertronix tomorrow. Will tell you later if this makes any changes.

Steve : nice calculator !
Eric de Lange

For your info; the gas prices per litre are up again over here.
Now E 1,46 per litre (about $ 1.80 PER LITRE). about 80% are taxes.
So, A full tank is about $ 75,00. I'm happy the wether sucks over here, so I'm not driving so much.

Eric
Eric de Lange

Yesterday I did about 300 miles with my '71 (stock ZS carbs, ignition & OD) with a mix of city and highway driving. I got 23 MPG (US).

Charlie
EC Smith

Mr. Stephano, I am using all the gears, I just left the handbrake on!!
When I bought the car it only got 9 MPG. The only change I have made is to have the carbs professionally adjusted.
Also, I have been doing alot of city driving,I'll see if the mileage is different after a long run this weekend.
Thanks for the info guys.

Alasdair
Alasdair

I'm down there in the 12 to 14 mpg range, depending on how I drive. Mine is a 71 with SU's. But, alas, the engine needs a rebuild, so probably my mileage doesn't mean a thing.

John
JL Bryan

even with a worn engine you should get more than 20mpg. Check your timing. If you get poor excelation below 2500rpm your timing is probably retarded. crank 10 degrees more advance in and see how it runs. Then find a hill and if it pings a lot back it off until it amost stops. I have found setting timming to factory gives very poor performace. Then if you have adjustable carbs check the mixture. I've found most tr6s get adjusted too rich.
But if you want every thing to work right and the cheapest performace improvement for late model cars take .075 off the head. You won't believe the difference! I took .100 off and the improvement was dramatic. .100 is a little too much for cheap gas though because you ping at a drop of a hat so the extra cost of the good gas defeats the savings in consumption. But .075 should be good. Milling the head cost me only $100 12 years ago but still cheaper than header.
skikir

skikir,
What CR results from .075 off the head?
db
Doug Baker

23 MPG (US). 18 and less City. I went from Toronto to Rochester once on 1/2 tank. But then that was using the new Ferry.
Bryn

Re: PING
I want to discover this mysterious PING. I haven't been able to find it but the car is running quite well (ie: NCB: not currently broken). I've tried small incremental increases until the engine starts to run poorly but I still haven't heard the point-in-case PING. Perhaps I should stick with the "its not broken" approach but I'd like to further improve the MPG if possible.
Bryn

I don't remember where I got these numbers.
compression=

7.34 = 3.55 inches
8.5 = 3.46 inches
10.25 = 3.375 inches

The distance is measured from the bottom to the valve cover surface.
3.40 inches should equal about 9.5
skikir

Doug and all-Tune in to Goodparts website (http://www.goodparts.com/) Under the tech. documents sidebar,there is a very detailed chart for compression ratios. My mileage? About 20 city, as high as 30 on the freeway with OD.
Berry Price
Albany, Or
BTP Price

I drove 180 miles on 10 imperial gallons around the city with my foot in the throttle, running hell out of the engine, shifting at 4000 - 6000 rpms.

Out on the highway in 5th cruising around I get about 22 - 25 mph with Dual SU HD8's and a hotted up cam etc.

John Parfitt

The PING is a bit elusive, Bryn. Once you hear it, though, you know it and try to avoid it. I seem to hear it a little now that I leaned my front carb a bit, so it's going back a flat or 2. It happens under load, not at idle.
Tom

Hello Alasdair,
I'm also on Kitchener..maybe we cam meet up and trade TR stories ?
I'm near Chicopee ski hill
Cheers
Charlie
Charlie B.

Hello Charlie B.
Yeah I'd like to meet up with another TR6 owner.
I live near the Aud. surrounded by MG and Fiats. I'm out of town till Aug 14th. I'll post again and we can hook up somewhere.

Alasdair.
Alasdair

This thread was discussed between 20/07/2005 and 01/08/2005

Triumph TR6 index

This thread is from the archive. The Live Triumph TR6 BBS is active now.