what kind of gas do you put in your bullitt
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Norman,
I've been putting regular in since day one and have had no problems. The ignition timing is setup for 87 octane and unless you are experiencing pinging, higher octane fuels are not recommended. They do not burn as thoroughly as lower octane fuels with our timing tables. If you advance the timing (either a Steeda timing adjuster or by computer reprogram), then you HAVE to use 93 or 94 octane fuel to keep the engine happy. Otherwise you're just burning up some extra cash that could be used as mod money. :grin:
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John
DHG #4851
<font size=-1>[ This Message was edited by: retromuscle on 2001-12-17 09:51 ]</font>
I've been putting regular in since day one and have had no problems. The ignition timing is setup for 87 octane and unless you are experiencing pinging, higher octane fuels are not recommended. They do not burn as thoroughly as lower octane fuels with our timing tables. If you advance the timing (either a Steeda timing adjuster or by computer reprogram), then you HAVE to use 93 or 94 octane fuel to keep the engine happy. Otherwise you're just burning up some extra cash that could be used as mod money. :grin:
_________________
John
DHG #4851
<font size=-1>[ This Message was edited by: retromuscle on 2001-12-17 09:51 ]</font>
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Only the Cobra 4V engine calls for 91 or above. JB, correct me if I'm wrong...
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I used 87 octane when I got it and it did just fine. Then I installed my chip. Now she has to have to good stuff, 93 octane, or she gripes at me.
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I've tried each grade (87, 89, 92) and the results surprised me at the time. I've run each grade for a minimum of 3 weeks starting with the 92 octaine.
92 Octaine: Car ran slugglish, didn't seem to have a continuous pull at higher RPM's.
89 Octaine: Much better than 92, car was quick.
87 Octaine: Best performance. Car "feels" much like its got more muscle and holds a good pull through higher RPM's. Gas pedal more responsive, much more than 92.
These results are by no mean scientific but rather just my observation. :smile:
92 Octaine: Car ran slugglish, didn't seem to have a continuous pull at higher RPM's.
89 Octaine: Much better than 92, car was quick.
87 Octaine: Best performance. Car "feels" much like its got more muscle and holds a good pull through higher RPM's. Gas pedal more responsive, much more than 92.
These results are by no mean scientific but rather just my observation. :smile:
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The mid grade is a mixture between premium and regular.
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There are no consequenses from going from a high octane back to a low octane.
Lower octane fuels actually have more energy per gallon. An octane rating is "resistance to combustion." The higher the rating, the harder (longer it takes) for the fuel to combust.
If you are noticing a higher gas miledge with higher octane, then that generally means you are getting incomplete combustion with the lower octanes. For the Bullitts, this should only be noticed in mod'ed cars.
Chevron 87 for #899. Loves it.
Lower octane fuels actually have more energy per gallon. An octane rating is "resistance to combustion." The higher the rating, the harder (longer it takes) for the fuel to combust.
If you are noticing a higher gas miledge with higher octane, then that generally means you are getting incomplete combustion with the lower octanes. For the Bullitts, this should only be noticed in mod'ed cars.
Chevron 87 for #899. Loves it.
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243 Posts
Manual calls for 87, thats what I use. When I put my chip in I'll switch to 92.
_________________
Bullitt #4542 Dark Highland Green
Mods: MAC Cold Air Tube w/ K&N Air Filter
CDC Sequential Turn Signal Kit
<font size=-1>[ This Message was edited by: Bullitt4542 on 2001-12-17 12:13 ]</font>
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Bullitt #4542 Dark Highland Green
Mods: MAC Cold Air Tube w/ K&N Air Filter
CDC Sequential Turn Signal Kit
<font size=-1>[ This Message was edited by: Bullitt4542 on 2001-12-17 12:13 ]</font>
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237 Posts
<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-12-17 11:57, CA_Bullitt wrote:
An octane rating is "resistance to combustion." The higher the rating, the harder (longer it takes) for the fuel to combust.</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>
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Octane rating is "the resistance to DETONATION, not the "resitance to combustion".
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If you are noticing a higher gas miledge with higher octane, then that generally means you are getting incomplete combustion with the lower octanes.
This is just wrong, sorry. :smile:
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Timing is the key that determines what octane level a car should be running. That and compression ratio. Higher octane gas burns slower and more evenly across the combustion chamber which is why it is not recommended in our cars with the current stock timing set up. It is necessary to run timing more advanced so that the fuel burns completely with high octane and using low octane fuel with advanced timing causes the engine to 'ping' or 'detonate'. Our engines, starting in 2001, had the compression ratio upped to 9.4:1 from 9:1. This, I believe, is why the earlier Bullitts were having pinging issues early on and the fix was to retard the timing by reprogramming or changing the computer. Using a chip on the other hand forces you to use higher octane fuel for the reasons said before, the timing is advanced (fuel curves also changed)and thus the need to use higher octane fuel. :grin:
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Bullitt #5338 - No mods necessary at this time! Ok, maybe a K&N filter
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<font size=-1>[ This Message was edited by: 1NastyFordGT on 2001-12-26 19:52 ]</font>
On 2001-12-17 11:57, CA_Bullitt wrote:
An octane rating is "resistance to combustion." The higher the rating, the harder (longer it takes) for the fuel to combust.</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>
-----------------------------------------
Octane rating is "the resistance to DETONATION, not the "resitance to combustion".
-----------------------------------------
If you are noticing a higher gas miledge with higher octane, then that generally means you are getting incomplete combustion with the lower octanes.
This is just wrong, sorry. :smile:
------------------------------------------
Timing is the key that determines what octane level a car should be running. That and compression ratio. Higher octane gas burns slower and more evenly across the combustion chamber which is why it is not recommended in our cars with the current stock timing set up. It is necessary to run timing more advanced so that the fuel burns completely with high octane and using low octane fuel with advanced timing causes the engine to 'ping' or 'detonate'. Our engines, starting in 2001, had the compression ratio upped to 9.4:1 from 9:1. This, I believe, is why the earlier Bullitts were having pinging issues early on and the fix was to retard the timing by reprogramming or changing the computer. Using a chip on the other hand forces you to use higher octane fuel for the reasons said before, the timing is advanced (fuel curves also changed)and thus the need to use higher octane fuel. :grin:
_________________
Bullitt #5338 - No mods necessary at this time! Ok, maybe a K&N filter
<font size=-1>[ This Message was edited by: 1NastyFordGT on 2001-12-26 19:52 ]</font>
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105 Posts
My baby runs great on 87 octane. I believe the owners manual states that premium in the US has an additive that can damage your fuel system, possibly the rubber parts.
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105 Posts
<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-12-17 12:05, 1NastyFordGT wrote:
Ditto to what BullittMike said! :smile: </BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>
Hey Nasty,
Why is Santa pulling on those Bullitts, I guess you don't have the traction control set, cause I know if you did the old fat man would be in 3rd place.
<font size=-1>[ This Message was edited by: 1NastyFordGT on 2001-12-26 19:55 ]</font>
On 2001-12-17 12:05, 1NastyFordGT wrote:
Ditto to what BullittMike said! :smile: </BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>
Hey Nasty,
Why is Santa pulling on those Bullitts, I guess you don't have the traction control set, cause I know if you did the old fat man would be in 3rd place.
<font size=-1>[ This Message was edited by: 1NastyFordGT on 2001-12-26 19:55 ]</font>
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14,857 Posts
well,i heard all the comments on regular,,,, i had been using only premium.... i tried my last 2 tanks on regular....FORGET IT... at least on 1994....it runs like crap ,mileage is down, performance is off... i dont get it
but last night i put exxon premium in and it was like arnold on steroids again... so...
premium only 4 me
but last night i put exxon premium in and it was like arnold on steroids again... so...
premium only 4 me
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