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Economy for 351C on LPG 

 

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 Post subject: Economy for 351C on LPG
Posted: Fri Jul 21, 2006 7:30 pm 
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Ok Ive converted my 351 to straight gas. I havent lost any power, but what sort of economy should i expect ?
ie: L / 100km
The 351 is stock except for extractors.
Im only running a 300 Mixer atm until i can get a 425.
and my tank is only 63L capacity ( i know its too small, but will get another) I havent been impressed so far, im only getting about 160 - 180 kms out of it, and 95% of that is freeway driving. The Clevo has just been rebuilt with gas heads, and has only about 2000kms on it . Would this be a factor? Any advice or comments are appreciated.
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Posted: Fri Jul 21, 2006 9:00 pm 
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Something not right there mate. Toddys' 351 powered clevo is on gas and he gets around 400ks from a tank. Only difference is the mixer: his has got the 425 on it (if not bigger!) Time for a tune or something! 8-)

 

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Posted: Fri Jul 21, 2006 9:07 pm 
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What size is his tank? I should have at least a 80 - 90 litre tank like most people do , but Ive only got a 60L. Its a new motor, stillgetting run in.

 

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Posted: Fri Jul 21, 2006 9:12 pm 
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Hes standing alongside me and says it is a 68 usable litre tank

 

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Posted: Fri Jul 21, 2006 9:16 pm 
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Hmmm well mines about 50L usable i suppose. What could effect the economy so much?

 

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Posted: Fri Jul 21, 2006 11:44 pm 
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Wots ya zorst like? Isn't restrictive at all? The different mixer won't make it run richer; more on the lean side and gutless. Bout all we can think of other than tuning :?

 

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Posted: Sat Jul 22, 2006 8:31 am 
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The exhaust is a Factory 2 1/4 inch Dual system.

 

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Posted: Sat Jul 22, 2006 10:15 am 
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mine is deulfeul so i can run to empty
when the red light comes on i get about 80ks further

 

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Posted: Sun Jul 23, 2006 1:39 am 
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Anyone else have any ideas on this?

 

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Posted: Thu Jul 27, 2006 10:37 pm 
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I had a 351C on gas and never got over 12 mpg (whatever that is in l/100km's) no matter how hard or soft I drove it, it always gave the same, even when towing. About 280 k's out of a tank which I think was 70 litres odd
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Posted: Thu Jul 27, 2006 11:10 pm 
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My dual fuel 351 in a Lanau always got 350-400k's out of a 70l gas tank. It was pretty stock except for extractor and 650 vac sec Holley. I'd check all your electrics (sparky's, leads, dizzy) and then get the gas tuned.

 

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Posted: Thu Jul 27, 2006 11:18 pm 
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Could it be because im running a Mallory twin point dissy. Because theres no vacuum advance on these dissy's , the timing is advanced a fair bit.. My clevo is new with gas heads and extractors, no other mods. My range varys, got about 180k's from it this week- 63L tank.

 

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 Post subject: F150
Posted: Thu Jul 27, 2006 11:42 pm 
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I GOT 351W IN A F TRUCK 110L USEABLE, FB425 MIXER ABOUT 400 KMS JUST CRUSING AROUND TOWN :lol:

 

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Posted: Fri Jul 28, 2006 12:05 am 
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should on average get about 3.5 kay per litre on gas if memory serves me correct.

if you have a 63lt tank thats about 220 kays

 

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Posted: Fri Jul 28, 2006 3:54 pm 
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i used to have a 351 on straight gas, in an LTD, used to get the same ks as u, 150 to 180ks max. first time i driove it i ran out of gas lol, i thought i would get more ks out of it. (gauage wasnt working). And also the engine was rebuilt for gas.
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