Race gas in street cars....

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Re: Race gas in street cars.... [Re: Blusmbl] #1360998 01/01/13 11:43 AM 01/01/13 11:43 AM
Joined: Jul 2010 Posts: 1,491 Oologah, Oklahoma Big Squeeze pro stock
Big Squeeze pro stock Joined: Jul 2010 Posts: 1,491 Oologah, Oklahoma	Quote: Quote: and here i was thinking i would get some good intel on what its like to run race gas in a street car. I KEEP FORGETTING THIS ISNT THE SAME MOPARTS IT WAS YEARS AGO! I'm sure complaining about it, then not adding any useful tech will help the situation! Yes, adding compression will make an engine more efficient. Being generous, a 1 point increase in CR is worth at most a 2% boost in overall power, and that number goes down as CR increases, too. I could see a fuel economy jump from 8 to 14 mpg only if you were comparing something like a 500" stroker at 9:1 with a grossly oversized cam, to a smallblock at 14:1 with a better cam choice. The efficiency goes up with the CR increase, but it isn't going to be such a drastic jump unless the previous combination was just terrible. Unfortunately I think Wayne is trying to point out that many of the pump gas combos people have with our old Mopars aren't anywhere close to optimized. There are stock motors in motorcycles and some cars that have 12:1 static CR these days. They're all aluminum blocks/heads, decent head/quench design, and efi with much better air/fuel and timing control than what most 60's era musclecars have though. I have one of these poor combos in my Jeep. The previous owner put a decent size cam in it, I'm guessing it's about 240 @ 50 duration. It has a stock smog era AMC 360 in it otherwise, with maybe 8.2:1 CR. Because of the cam and it's intake closing point, it makes about 115 psi of cranking compression. It's terrible, no bottom end power at all, gets 9mpg with 3.54 gears and 33" tires, etc. The engine would be much happier with that same cam with another 3 points of static CR. But it's not a fair comparison, because the combination of parts is poor to begin with. If the cranking compression got up to 180-190 by swapping slugs with that same cam it wouldn't be such a turd to drive and the fuel economy would go up, too. Exactly....it's pretty common for some guy's 12 second thrown together combo to get 8 miles/gallon...while a nicely built, scienced out combo that runs 10's can get 14mpg +... Having said that, my car runs 127mph in the 1/4 through manifolds on nuts at 3,590lbs....has good quench...plenty of timing at cruise (vacuum advance)....A/F is in the mid to high 13's....so I'm sure it does OK, but I've honestly never driven through a whole tank without going WOT and power shifting 20-30 times...LOL because I could honestly not care any less about what kind of mileage it gets or what I spent on race gas (unless it cost $30+/gallon like mentioned ).... To me, race gas is just like any other consumable involved with hot rods, like oil, tires, valve springs and roller lifters...it's just part of the territory.. If you can't handle the truth, you're living a lie.......

Entire Thread
Subject	Posted By	Posted
Race gas in street cars....	moparniac	12/29/12 10:58 PM
Re: Race gas in street cars....	pittsburghracer	12/29/12 11:48 PM
Re: Race gas in street cars....	1967dartgt	12/30/12 02:40 AM
Re: Race gas in street cars....	poisondart2	12/30/12 02:58 AM
Re: Race gas in street cars....	Just-a-dart	12/29/12 11:58 PM
Re: Race gas in street cars....	SpareParts	12/30/12 12:23 AM
Re: Race gas in street cars....	emarine01	12/30/12 12:28 AM
Re: Race gas in street cars....	bigtimeauto	12/30/12 01:38 AM
Re: Race gas in street cars....	ek3	12/30/12 02:09 AM
Re: Race gas in street cars....	67Satty	12/30/12 02:28 AM
Re: Race gas in street cars....	ek3	12/30/12 07:31 PM
Re: Race gas in street cars....	bwhackd34	01/01/13 01:30 PM
Re: Race gas in street cars....	Tig	01/01/13 02:18 PM
Re: Race gas in street cars....	challenger451ci	01/01/13 03:13 PM
Re: Race gas in street cars....	slippery440	01/01/13 02:43 PM
Re: Race gas in street cars....	Tig	01/01/13 03:15 PM
Re: Race gas in street cars....	Big Squeeze	01/01/13 03:31 PM
Re: Race gas in street cars....	WHITEDART	12/30/12 02:28 AM
Re: Race gas in street cars....	one bad fish	12/30/12 02:43 AM
Re: Race gas in street cars....	bigtimeauto	12/30/12 03:10 AM
Re: Race gas in street cars....	one bad fish	12/30/12 03:11 AM
Re: Race gas in street cars....	WHITEDART	12/30/12 03:18 AM
Re: Race gas in street cars....	emarine01	12/30/12 03:26 AM
Re: Race gas in street cars....	quickd100	12/30/12 03:32 AM
Re: Race gas in street cars....	cheapstreetdustr	12/30/12 04:33 AM
Re: Race gas in street cars....	radar	12/30/12 04:42 AM
Re: Race gas in street cars....	pinkduster	12/30/12 05:18 AM
Re: Race gas in street cars....	Old School	12/30/12 05:37 AM
Re: Race gas in street cars....	Thumperdart	12/30/12 03:12 AM
Re: Race gas in street cars....	moparniac	12/30/12 09:16 AM
Re: Race gas in street cars....	RemCharger	12/30/12 10:20 AM
Re: Race gas in street cars....	MR_P_BODY	12/30/12 04:14 PM
Re: Race gas in street cars....	Big Squeeze	12/30/12 04:42 PM
Re: Race gas in street cars....	408Dust	12/30/12 05:03 PM
Re: Race gas in street cars....	bigtimeauto	12/30/12 05:26 PM
Re: Race gas in street cars....	dannysbee	12/30/12 05:26 PM
Re: Race gas in street cars....	Thumperdart	12/30/12 10:21 AM
Re: Race gas in street cars....	RemCharger	12/30/12 10:24 AM
Re: Race gas in street cars....	Thumperdart	12/30/12 10:28 AM
Re: Race gas in street cars....	Duner	12/30/12 05:29 PM
Re: Race gas in street cars....	pittsburghracer	12/30/12 05:38 PM
Re: Race gas in street cars....	moparniac	12/30/12 07:13 PM
Re: Race gas in street cars....	pittsburghracer	12/30/12 07:50 PM
Re: Race gas in street cars....	bdaz smblk	12/30/12 05:38 PM
Re: Race gas in street cars....	bigtimeauto	12/30/12 05:40 PM
Re: Race gas in street cars....	moparniac	12/30/12 06:04 PM
Re: Race gas in street cars....	Thumperdart	12/30/12 06:47 PM
Re: Race gas in street cars....	moparniac	12/30/12 07:19 PM
Re: Race gas in street cars....	Thumperdart	12/30/12 07:59 PM
Re: Race gas in street cars....	moparniac	12/30/12 08:03 PM
Re: Race gas in street cars....	Thumperdart	12/30/12 08:11 PM
Re: Race gas in street cars....	moparniac	12/31/12 08:50 AM
Re: Race gas in street cars....	Big Squeeze	12/31/12 03:09 PM
Re: Race gas in street cars....	moparniac	12/31/12 03:30 PM
Re: Race gas in street cars....	Big Squeeze	12/31/12 07:51 PM
Re: Race gas in street cars....	Thumperdart	12/31/12 04:30 PM
Re: Race gas in street cars....	moparniac	01/01/13 03:46 PM
Re: Race gas in street cars....	Thumperdart	01/01/13 06:45 PM
Re: Race gas in street cars....	racealittle	01/01/13 07:18 PM
Re: Race gas in street cars....	Old School	12/31/12 08:39 PM
Re: Race gas in street cars....	383man	12/31/12 10:07 PM
Re: Race gas in street cars....	Mopar-Al	12/31/12 10:24 PM
Re: Race gas in street cars....	moparniac	01/01/13 03:48 PM
Re: Race gas in street cars....	Mopar-Al	01/01/13 04:42 PM
Re: Race gas in street cars....	Quicktree	01/01/13 05:33 PM
Re: Race gas in street cars....	moparniac	01/01/13 05:37 PM
Re: Race gas in street cars....	Quicktree	01/01/13 05:42 PM
Re: Race gas in street cars....	rickstershemi	01/01/13 08:17 PM
Re: Race gas in street cars....	Quicktree	01/01/13 08:27 PM
Re: Race gas in street cars....	Challenger 1	01/09/13 04:02 PM
Re: Race gas in street cars....	MPerry	01/01/13 05:37 PM
Re: Race gas in street cars....	rickraw	12/31/12 10:26 PM
Re: Race gas in street cars....	Big Squeeze	01/01/13 12:00 AM
Re: Race gas in street cars....	Thumperdart	01/01/13 03:12 AM
Re: Race gas in street cars....	hemi-itis	01/01/13 04:37 AM
Re: Race gas in street cars....	HotRodDave	01/09/13 04:57 PM
Re: Race gas in street cars....	bwdst6	01/10/13 04:33 AM
Re: Race gas in street cars....	sixpackgut	12/30/12 08:00 PM
Re: Race gas in street cars....	hemi-itis	12/31/12 01:12 AM
Re: Race gas in street cars....	WHITEDART	12/30/12 06:19 PM
Re: Race gas in street cars....	SLOW67	12/30/12 06:33 PM
Re: Race gas in street cars....	emarine01	12/30/12 06:35 PM
Re: Race gas in street cars....	emarine01	12/30/12 05:42 PM
Re: Race gas in street cars....	MPerry	12/30/12 05:48 PM
Re: Race gas in street cars....	dannysbee	12/30/12 06:05 PM
Re: Race gas in street cars....	11secdart	12/30/12 06:27 PM
Re: Race gas in street cars....	moparniac	12/30/12 06:35 PM
Re: Race gas in street cars....	emarine01	12/30/12 06:45 PM
Re: Race gas in street cars....	moparniac	12/30/12 07:15 PM
Re: Race gas in street cars....	Winchester 73	01/01/13 07:37 AM
Re: Race gas in street cars....	Blusmbl	01/01/13 03:31 PM
Re: Race gas in street cars....	Big Squeeze	01/01/13 03:43 PM
Re: Race gas in street cars....	gsmopar	01/08/13 05:44 AM
Re: Race gas in street cars....	G-Money1320	01/09/13 02:35 AM
Re: Race gas in street cars....	EvilB1Dart	01/09/13 03:12 AM
Re: Race gas in street cars....	emarine01	01/09/13 03:59 AM
Re: Race gas in street cars....	Efidart	01/09/13 06:19 AM
Re: Race gas in street cars....	69B3GT	01/09/13 07:22 AM
Re: Race gas in street cars....	rickstershemi	01/09/13 03:00 PM
Re: Race gas in street cars....	Thumperdart	01/10/13 02:51 AM
Re: Race gas in street cars....	tboomer	01/10/13 02:16 PM
Re: Race gas in street cars....	an8sec70cuda	01/10/13 03:19 PM
Re: Race gas in street cars....	572charger	01/13/13 01:50 PM

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