Unleaded vs Premium |
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Unleaded vs Premium |
Neal |
Sep 8 2003, 01:24 PM
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#1
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Member Group: Members Posts: 300 Joined: 23-April 03 From: Sammamish, Washington Member No.: 605 |
I wanted to know for a engine developed in the 70's and rebuilt in the 2000's do you think 4 octane points higher makes a difference on how the engine performs as a daily driver ?
(IMG:style_emoticons/default/icon14.gif) Attached File(s) Firef4_2Ejpg.jpe ( 60.06k ) Number of downloads: 0 |
redshift |
Sep 8 2003, 01:27 PM
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#2
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
Yep! 2.0s hate premium, runs cold.
M |
aufaber |
Sep 8 2003, 02:24 PM
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#3
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Member Group: Members Posts: 190 Joined: 7-April 03 From: Huntington Beach, CA Member No.: 525 |
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tat2dphreak |
Sep 8 2003, 02:28 PM
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#4
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
QUOTE(redshift @ Sep 8 2003, 02:27 PM) Yep! 2.0s hate premium, runs cold. M is that true for 1.7/1.8L also? |
redshift |
Sep 8 2003, 02:45 PM
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#5
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
I don't remember the 1.8 not liking it.
Injected 2.0s and 1.7s I have had hate it. If it's hot outside, they flutter at idle, almost like an overheat, and the idle drops 300 or so, and can cause all kinds of shit warm starting. We have some of the best quality gas you can buy in the states here, you have even better maybe. Dense winter air is another story, make you wish you had 104 octane, and 4' velocity stacks. (IMG:style_emoticons/default/smile.gif) M |
Neal |
Sep 8 2003, 02:52 PM
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#6
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Member Group: Members Posts: 300 Joined: 23-April 03 From: Sammamish, Washington Member No.: 605 |
My car has webers and I live in Seattle, would premium help ?, it's a 2.0 with euro pistons and a mild factory cam.
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redshift |
Sep 8 2003, 03:03 PM
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#7
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
I don't know.
Washington has boutique fuels, like California? Test out only a half a tank, or even less, won't hurt you, with carbs, and somewhat milder weather than us poor folks in the killing zone. (IMG:style_emoticons/default/happy11.gif)(IMG:style_emoticons/default/smash.gif) i hate heat M |
ChrisReale |
Sep 8 2003, 03:14 PM
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#8
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
Premium is the expensive shit, right? Thats all I put in mine....
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tat2dphreak |
Sep 8 2003, 03:42 PM
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#9
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
I used premium in my carbbed 1.7... and I wonder if that's one of the many reasons it didn't idle smooth...
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p914 |
Sep 8 2003, 04:10 PM
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#10
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Senior Member Group: Members Posts: 518 Joined: 7-September 03 From: Sunny South Florida Member No.: 1,117 Region Association: None |
QUOTE(redshift @ Sep 8 2003, 11:27 AM) Yep! 2.0s hate premium, runs cold. M Why is it that 2.0s don't like premium? It ignites at a lower temp. |
p914 |
Sep 8 2003, 04:12 PM
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#11
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Senior Member Group: Members Posts: 518 Joined: 7-September 03 From: Sunny South Florida Member No.: 1,117 Region Association: None |
QUOTE(redshift @ Sep 8 2003, 01:03 PM) I don't know. Washington has boutique fuels, like California? Test out only a half a tank, or even less, won't hurt you, with carbs, and somewhat milder weather than us poor folks in the killing zone. (IMG:style_emoticons/default/happy11.gif)(IMG:style_emoticons/default/smash.gif) i hate heat M WA state has good gas and is regulated. Oregon gas is questionable depending on the station. |
aufaber |
Sep 8 2003, 04:34 PM
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#12
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Member Group: Members Posts: 190 Joined: 7-April 03 From: Huntington Beach, CA Member No.: 525 |
QUOTE(p914 @ Sep 8 2003, 02:10 PM) QUOTE(redshift @ Sep 8 2003, 11:27 AM) Yep! 2.0s hate premium, runs cold. M Why is it that 2.0s don't like premium? It ignites at a lower temp. Octane is a rating of resitance to ignition. http://auto.howstuffworks.com/question90.htm The higher the octane the harder to ignite. -Aaron G. |
redshift |
Sep 8 2003, 04:44 PM
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#13
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
QUOTE(p914 @ Sep 8 2003, 06:10 PM) QUOTE(redshift @ Sep 8 2003, 11:27 AM) Yep! 2.0s hate premium, runs cold. M Why is it that 2.0s don't like premium? It ignites at a lower temp. Our engines are as hot as fire. Another thing, you are tossing money away if your local fuel is good, and you are fueling with a higher octane fuel, and I am telling you, it's not a good thing, and you can feel the difference in 87-91-93, nice, flutter, flap like a bird. Early 1.7 used high test though, did they not? It's not just something you decide to do one day, engineers worked at all this, they spec the rating in the build, just like cam duration, and valve clearance. You can change octane, I don't know what the environmental changes to the equation, but your plugs must be in another temp range than stock, and gapped different. There you go, that is what the difference feels like, bad gap, and that is how you take it up, bad gap. M |
p914 |
Sep 8 2003, 04:47 PM
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#14
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Senior Member Group: Members Posts: 518 Joined: 7-September 03 From: Sunny South Florida Member No.: 1,117 Region Association: None |
QUOTE(redshift @ Sep 8 2003, 02:44 PM) QUOTE(p914 @ Sep 8 2003, 06:10 PM) QUOTE(redshift @ Sep 8 2003, 11:27 AM) Yep! 2.0s hate premium, runs cold. M Why is it that 2.0s don't like premium? It ignites at a lower temp. Our engines are as hot as fire. M I use a colder plug because I have electronic ignition and the gap is .038. A little wider than normal. |
Andyrew |
Sep 8 2003, 04:53 PM
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#15
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Redshift, your saying use the cheepo stuff?
Andrew |
redshift |
Sep 8 2003, 05:04 PM
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#16
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
Look in your owners manual.
(IMG:style_emoticons/default/smilie_pokal.gif) And with that, I go nappy. M |
Andyrew |
Sep 8 2003, 05:43 PM
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#17
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Hehe, I have about 5 workshop manuals, but not the factory owners, keeping my eye on ebay for a nice one cheap..
Andrew |
redshift |
Sep 8 2003, 05:49 PM
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#18
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
(IMG:style_emoticons/default/smile.gif)
and I can't sleep so... 1.7 (early) 98 RON 1.7 (late) 91 RON 2.0 91 RON be right back.. M |
redshift |
Sep 8 2003, 05:52 PM
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#19
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
Googlectomy! There is the whole thing in a page. -whew- (popups crap!) Hold on..
http://www.azcentral.com/arizonarepublic/w...els28click.html M |
Bleyseng |
Sep 8 2003, 06:05 PM
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#20
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Hmm, thats not what I have read before. DD posted a bunch of stuff before of how the ratings are different and how to translate them for todays fuel. I have used regular and hitest in my 2056 engine. Seems to like the good stuff much better, runs smoother.
Geoff |
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