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07-28-2008, 11:56 AM
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#61
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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Quote:
Originally Posted by glenn64vette
Highest Vacuum with the lowest possible RPM= Highest MPG. ![Smile](images/smilies/smile.gif)
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No Glenn, 55 is magic. Haven't you been keeping up?
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07-28-2008, 01:01 PM
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#62
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Resident Avatar Gambler
Join Date: Nov 2006
Posts: 5,997
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Quote:
Originally Posted by enkeivette
No Glenn, 55 is magic. Haven't you been keeping up?
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55 is not magic, as I've said all along, for MOST vehicles it's better than higher speeds. Are we letting this go, or what?
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07-28-2008, 01:29 PM
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#63
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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Quote:
Originally Posted by SeanPlunk
55 is not magic, as I've said all along, for MOST vehicles it's better than higher speeds. Are we letting this go, or what?
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It's gone Sean. I was just trying to be funny, sorry massa.
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08-09-2008, 09:43 AM
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#64
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Senior Member
Join Date: Mar 2008
Posts: 177
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A couple of links
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08-11-2008, 08:48 AM
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#65
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Neanderthal
Join Date: Mar 2008
Posts: 5,320
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Quote:
Originally Posted by enkeivette
No Glenn, 55 is magic. Haven't you been keeping up?
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Ok, I guess not........................................... What were we talking about?
Slowboy ![Crutches](images/smilies/smiley_crutches_ani.gif)
__________________
64 Vette Roadster 400 ci
1990 F150 351 ci SuperCharged
48 Harley Pan Head 76 ci
2016 Nissan Altma
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08-11-2008, 12:11 PM
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#66
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Fast & Filthy
Join Date: Jun 2008
Posts: 3,840
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Okay, since I'm the only one who has currently tested this I'll put in my 2 cents. In my Cobra which has 220 degrees duration at .050 I can cruise at 55 in 6th (.62) without lugging my engine. However, I pull less vacuum cruising at 55 than I do at 60.
When I ran my tests I pulled 27.202 mpg at 60mph and only 22.218 mpg at 55mph. However, I drove the same route but in different directions at the different speeds so my test is only half way done.
I will be driving the same route this Thursday so I will reverse my speeds so I have an acurate reading for both speeds in both directions. Also, the total miles driven were 131 miles.
And final, my car is also not typical. It's a '94 Cobra with a Votech blown 302 that made 433rwhp. I built the engine myself but had the tune done by Steve at Powertrain Dynamics.
Last edited by 94cobra69ss396 : 08-11-2008 at 05:28 PM.
Reason: Spelling
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08-14-2008, 02:27 PM
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#67
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Fast & Filthy
Join Date: Jun 2008
Posts: 3,840
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So I finished testing the second half today. Today at 55mph I pulled 25.844mpg and at 60mph I got 28.333mpg. So my car definitely gets better gas millage at 60 then it does at 55.
Next time I go out to the same customer I will drive both directions at 65 and report the numbers.
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08-14-2008, 03:18 PM
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#68
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Resident Avatar Gambler
Join Date: Nov 2006
Posts: 5,997
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Quote:
Originally Posted by 94cobra69ss396
So I finished testing the second half today. Today at 55mph I pulled 25.844mpg and at 60mph I got 28.333mpg. So my car definitely gets better gas millage at 60 then it does at 55.
Next time I go out to the same customer I will drive both directions at 65 and report the numbers.
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Interesting. What is the 5th gear ratio for your transmission, and what is your rearend gearing?
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08-14-2008, 03:35 PM
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#69
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Neanderthal
Join Date: Mar 2008
Posts: 5,320
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Quote:
Originally Posted by 94cobra69ss396
Okay, since I'm the only one who has currently tested this I'll put in my 2 cents. In my Cobra which has 220 degrees duration at .050 I can cruise at 55 in 6th (.62) without lugging my engine. However, I pull less vacuum cruising at 55 than I do at 60.
When I ran my tests I pulled 27.202 mpg at 60mph and only 22.218 mpg at 55mph. However, I drove the same route but in different directions at the different speeds so my test is only half way done.
I will be driving the same route this Thursday so I will reverse my speeds so I have an acurate reading for both speeds in both directions. Also, the total miles driven were 131 miles.
And final, my car is also not typical. It's a '94 Cobra with a Votech blown 302 that made 433rwhp. I built the engine myself but had the tune done by Steve at Powertrain Dynamics.
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An 80mph MPG test would be interesting. Hint-hint. ![Rolling Eyes](images/smilies/sm_up_there.gif)
__________________
64 Vette Roadster 400 ci
1990 F150 351 ci SuperCharged
48 Harley Pan Head 76 ci
2016 Nissan Altma
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08-14-2008, 06:37 PM
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#70
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Fast & Filthy
Join Date: Jun 2008
Posts: 3,840
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I know for a fact that I won't do as well at 80. I have a customer out in Phoenix and I recorded my mpg out to Blythe. I was doing 75mph the whole way there and only got a little over 21mpg.
Sean, I replaced my T5 with a T56 after breaking the T5 twice. The T56 has a .62 6th and I have 3.55 gears and 245/45/17 tires. At 60mph I'm turning right near 1800rpms.
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