Re: Super duper gas miledge 273/318 experiment !!! UPD
[Re: jcc]
#47634
01/30/08 11:16 AM
01/30/08 11:16 AM
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Joined: Jan 2005
Posts: 12,423 Kalispell Mt.
HotRodDave
OP
I Live Here
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OP
I Live Here
Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
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For the lack of time and money I have in this I am very happy. I have an electronic distributer (several actually to get parts for recurving)and a wiring harness but no ECU yet.
I have just been cautious with the vacume advance as I don't want pinging on my hyper pistons. I will probably hook it up today.
I know things can be scewed by where I fill up. However I made sure every thing would be real close here, Both stations were level and unlike a fit or any other newer car there is no overflow tank or expansion tank in the cuda. When it is full it is full you can see every drop of fuel in the filler neck. Next time I get a few dollars I will get a new speedo cable and fill up and make a new check. The motor is still loosening up a bit too, it doesn't warm up near as fast as it was at first.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Super duper gas miledge 273/318 experiment !!! UPD
[Re: HotRodDave]
#47635
01/30/08 07:51 PM
01/30/08 07:51 PM
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Joined: Jan 2005
Posts: 12,423 Kalispell Mt.
HotRodDave
OP
I Live Here
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OP
I Live Here
Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
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Adjusted the valves properly today and it (and a couple other things) really made the power jump up. a few intakes were loose a few were tight and of course all the exhausts were tight. I realized since it had been sitting a few months the tires lost preasure from cold and just sitting I aired them up from 25 to 50 today. Tires say 51 lbs max. I also bumped the timing up to 20 initial and 30 total and still no pinging I bought and installed a speedo cable but it is not working I also picked up an ECU so I have a complete ignition conversion kit to install next time I get some time. Between airing up the tires, the valves and timing adjustments it really woke up today. If I can ever get the speedo working I will get some more MPG numbers.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Super duper gas miledge 273/318 experiment !!! UPD
[Re: HotRodDave]
#47636
01/30/08 08:22 PM
01/30/08 08:22 PM
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Joined: Jun 2006
Posts: 824 NH
72challorange
He's Game
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He's Game
Joined: Jun 2006
Posts: 824
NH
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Use a portable GPS unit it will give you actual miles traveled and MPH as well. Nice job on the project so far. Tom
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Re: Super duper gas miledge 273/318 experiment !!! UPD
[Re: shupe]
#47641
02/01/08 05:47 AM
02/01/08 05:47 AM
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Joined: Mar 2005
Posts: 1,546 Seattle, WA
375inStroke
Special needs person
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Special needs person
Joined: Mar 2005
Posts: 1,546
Seattle, WA
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Quote:
Interesting thread. I have a question about the optimal cruise rpm. What is the reasoning behind the peak torque rpm being the optimal cruise rpm? Peak torque rpm is determined at full throttle. Cruise is done at fairly light throttle. Why would peak torque rpm be the optimal cruise MPG rpm - theory-wise? -Shupe
Peak torque occurs at the lowest brake specific fuel consumption, which is how much fuel you use per HP per hour. The engine makes the most torque at its most efficient RPM. Go above this RPM, and the engine will make more HP, but less torque, and it will be using more fuel to do it with less HP per unit of fuel.
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Re: Super duper gas miledge 273/318 experiment !!! UPD
[Re: Nick Mineau]
#47645
02/01/08 11:57 AM
02/01/08 11:57 AM
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Joined: Jan 2005
Posts: 12,423 Kalispell Mt.
HotRodDave
OP
I Live Here
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OP
I Live Here
Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
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If your cruising was done at wide open then yes you would get best MPG at peak tq. But really who cruises at full throttle? For best MPG you need to figure out where your part throttle peak tq is, I garauntee it will be lower than the full throttle pk tq. My car cruises about 2200 now and feels like it is way past a shift point, when I let off from steady cruising it vaccume brakes hard.
I did get the speedo working yesterday and filled it up again to get a fresh new reading. I have just been driving it around town so next fill up should be a good city miledge test but it will probably be a few days.
I will wait till I get those results before changing any more like installing electronic ign. or even hooking up the vaccume advance.
I think our 1/8th mile track opens in about a month and I will test it up there for the fun of it, any one want to make a guess on that? I will not change anything from the street tune.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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