Octane/boost question:
Thread Starter
5th Gear Member
Joined: Dec 2005
Posts: 2,060
From: Okla.
Octane/boost question:
Just out of curiousity.. i have talked with a few tuners on the phone and they are both kinda torn on this. My car I got is tuned for 93 octane, but its supposed to be a relatively safe tune. The car also has the snow performance kit on it.
My problem is the car is tuned for 93.. but we only have 91 available here. I know about detonation, etc.. but with that snow kit, especally if I run a little higher mixture of methonal I do not think I would have any issues.. has anyone had any experience or firsthand knowledge with this?
Thanks!
My problem is the car is tuned for 93.. but we only have 91 available here. I know about detonation, etc.. but with that snow kit, especally if I run a little higher mixture of methonal I do not think I would have any issues.. has anyone had any experience or firsthand knowledge with this?
Thanks!
6th Gear Member
Joined: Jun 2006
Posts: 5,693
From: Maine
RE: Octane/boost question:
ORIGINAL: luckythirteen13
you could try running 91 and listening for ping or you can have it retuned. why is it tuned for 93 if they only have 91 in your area?
you could try running 91 and listening for ping or you can have it retuned. why is it tuned for 93 if they only have 91 in your area?
1st Gear Member
Joined: Sep 2006
Posts: 126
From:
RE: Octane/boost question:
ORIGINAL: samseed101
Good question. But I don't anticipate you having any problems at all. If you are running a water / meth injection kit and 91 octane, that should easily make up for the 2 octane difference. Just do get too aggressive on the timing and keep the tank full. You should be able to get away with running windshield washer fluid though. Should be enough methanol in there to make up the small difference,
ORIGINAL: luckythirteen13
you could try running 91 and listening for ping or you can have it retuned. why is it tuned for 93 if they only have 91 in your area?
you could try running 91 and listening for ping or you can have it retuned. why is it tuned for 93 if they only have 91 in your area?
5th Gear Member
Joined: Apr 2005
Posts: 3,584
From: CT
RE: Octane/boost question:
Because he bought the car from me and I live in NY. We have 93 octane and that's what I always ran in it.
I think that he will be ok with the Snow kit. If the car didn't have it and was tuned for 93, I'd think it would be a disaster waiting to happen. But with the meth, he should be fine.
BTW, Snow sells "Boost Juice" which is 50/50. That more than wiper fluid, which is what I got it tuned on.
I think that he will be ok with the Snow kit. If the car didn't have it and was tuned for 93, I'd think it would be a disaster waiting to happen. But with the meth, he should be fine.
BTW, Snow sells "Boost Juice" which is 50/50. That more than wiper fluid, which is what I got it tuned on.
5th Gear Member
Joined: Jul 2003
Posts: 3,451
From: United States
RE: Octane/boost question:
2 octane can make a difference. I set my timing based off of it. I managed to get 20 degrees without knock with 89 octane. I ran 87 in it & it started knocking @ high end.
What you could do is run the car almost out of gas, put $1 worth of 87 octane in it & go down the road if you hear no knock then you're definetly safe with all above. If you hear it, don't sweat it, just go back & fill it with $5 worth of 91, wait for it to run nearly out then try again with 89.
What you could do is run the car almost out of gas, put $1 worth of 87 octane in it & go down the road if you hear no knock then you're definetly safe with all above. If you hear it, don't sweat it, just go back & fill it with $5 worth of 91, wait for it to run nearly out then try again with 89.
6th Gear Member
Joined: Jun 2006
Posts: 5,693
From: Maine
RE: Octane/boost question:
ORIGINAL: FoxGT
2 octane can make a difference. I set my timing based off of it. I managed to get 20 degrees without knock with 89 octane. I ran 87 in it & it started knocking @ high end.
What you could do is run the car almost out of gas, put $1 worth of 87 octane in it & go down the road if you hear no knock then you're definetly safe with all above. If you hear it, don't sweat it, just go back & fill it with $5 worth of 91, wait for it to run nearly out then try again with 89.
2 octane can make a difference. I set my timing based off of it. I managed to get 20 degrees without knock with 89 octane. I ran 87 in it & it started knocking @ high end.
What you could do is run the car almost out of gas, put $1 worth of 87 octane in it & go down the road if you hear no knock then you're definetly safe with all above. If you hear it, don't sweat it, just go back & fill it with $5 worth of 91, wait for it to run nearly out then try again with 89.
5th Gear Member
Joined: Apr 2005
Posts: 3,584
From: CT
RE: Octane/boost question:
ORIGINAL: FoxGT
2 octane can make a difference. I set my timing based off of it. I managed to get 20 degrees without knock with 89 octane. I ran 87 in it & it started knocking @ high end.
What you could do is run the car almost out of gas, put $1 worth of 87 octane in it & go down the road if you hear no knock then you're definetly safe with all above. If you hear it, don't sweat it, just go back & fill it with $5 worth of 91, wait for it to run nearly out then try again with 89.
2 octane can make a difference. I set my timing based off of it. I managed to get 20 degrees without knock with 89 octane. I ran 87 in it & it started knocking @ high end.
What you could do is run the car almost out of gas, put $1 worth of 87 octane in it & go down the road if you hear no knock then you're definetly safe with all above. If you hear it, don't sweat it, just go back & fill it with $5 worth of 91, wait for it to run nearly out then try again with 89.
What? If he puts 87 or 89 in there he's nuts. Do you realize this is a boosted application we are talking about?
2nd Gear Member
Joined: Feb 2006
Posts: 355
From: Maryland
RE: Octane/boost question:
I'm using the snow kit on my car. You didn't say how your kit is activated, but as long as it is adjusted properly you should be fine while on boost.
You have to be careful, however, with your situation. Running a 93 tune on 91 will make the car susceptible to ping even when you're not on boost, which is most of the time. A common time to get ping is right after an upshift and the motor is at low rpm and under some load or just taking off. If the water/meth is adjusted to come on only when boosted it will not help at all in this kind of situation.
In my case I am running adequate octane non-boosted but have raised my max boost. The water/meth prevents ping while boosted, but is not needed when I am not in boost.
Also be aware that ping is heat sensitive. My car is much more sensitive to bad gas and ping in hot weather. What works now may not work next summer.
You have to be careful, however, with your situation. Running a 93 tune on 91 will make the car susceptible to ping even when you're not on boost, which is most of the time. A common time to get ping is right after an upshift and the motor is at low rpm and under some load or just taking off. If the water/meth is adjusted to come on only when boosted it will not help at all in this kind of situation.
In my case I am running adequate octane non-boosted but have raised my max boost. The water/meth prevents ping while boosted, but is not needed when I am not in boost.
Also be aware that ping is heat sensitive. My car is much more sensitive to bad gas and ping in hot weather. What works now may not work next summer.
ORIGINAL: HaV
Just out of curiousity.. i have talked with a few tuners on the phone and they are both kinda torn on this. My car I got is tuned for 93 octane, but its supposed to be a relatively safe tune. The car also has the snow performance kit on it.
My problem is the car is tuned for 93.. but we only have 91 available here. I know about detonation, etc.. but with that snow kit, especally if I run a little higher mixture of methonal I do not think I would have any issues.. has anyone had any experience or firsthand knowledge with this?
Thanks!
Just out of curiousity.. i have talked with a few tuners on the phone and they are both kinda torn on this. My car I got is tuned for 93 octane, but its supposed to be a relatively safe tune. The car also has the snow performance kit on it.
My problem is the car is tuned for 93.. but we only have 91 available here. I know about detonation, etc.. but with that snow kit, especally if I run a little higher mixture of methonal I do not think I would have any issues.. has anyone had any experience or firsthand knowledge with this?
Thanks!
Thread Starter
5th Gear Member
Joined: Dec 2005
Posts: 2,060
From: Okla.
RE: Octane/boost question:
ORIGINAL: Justastockmustang
I'm using the snow kit on my car. You didn't say how your kit is activated, but as long as it is adjusted properly you should be fine while on boost.
You have to be careful, however, with your situation. Running a 93 tune on 91 will make the car susceptible to ping even when you're not on boost, which is most of the time. A common time to get ping is right after an upshift and the motor is at low rpm and under some load or just taking off. If the water/meth is adjusted to come on only when boosted it will not help at all in this kind of situation.
In my case I am running adequate octane non-boosted but have raised my max boost. The water/meth prevents ping while boosted, but is not needed when I am not in boost.
Also be aware that ping is heat sensitive. My car is much more sensitive to bad gas and ping in hot weather. What works now may not work next summer.
I'm using the snow kit on my car. You didn't say how your kit is activated, but as long as it is adjusted properly you should be fine while on boost.
You have to be careful, however, with your situation. Running a 93 tune on 91 will make the car susceptible to ping even when you're not on boost, which is most of the time. A common time to get ping is right after an upshift and the motor is at low rpm and under some load or just taking off. If the water/meth is adjusted to come on only when boosted it will not help at all in this kind of situation.
In my case I am running adequate octane non-boosted but have raised my max boost. The water/meth prevents ping while boosted, but is not needed when I am not in boost.
Also be aware that ping is heat sensitive. My car is much more sensitive to bad gas and ping in hot weather. What works now may not work next summer.
ORIGINAL: HaV
Just out of curiousity.. i have talked with a few tuners on the phone and they are both kinda torn on this. My car I got is tuned for 93 octane, but its supposed to be a relatively safe tune. The car also has the snow performance kit on it.
My problem is the car is tuned for 93.. but we only have 91 available here. I know about detonation, etc.. but with that snow kit, especally if I run a little higher mixture of methonal I do not think I would have any issues.. has anyone had any experience or firsthand knowledge with this?
Thanks!
Just out of curiousity.. i have talked with a few tuners on the phone and they are both kinda torn on this. My car I got is tuned for 93 octane, but its supposed to be a relatively safe tune. The car also has the snow performance kit on it.
My problem is the car is tuned for 93.. but we only have 91 available here. I know about detonation, etc.. but with that snow kit, especally if I run a little higher mixture of methonal I do not think I would have any issues.. has anyone had any experience or firsthand knowledge with this?
Thanks!
I have not been in boost at all since I had to fill up w/ 91.. completely avoided that. The kit is setup to spray only during WOT.. mash the pedal it comes on. I have not heard any pinging at all during any upshifts or when letting off the gas while on the road (no backfires, etc that I could tell). I may just go ahead and have a couple points of timing pulled, if I can get the file emailed to me.. otherwise we have to do a full retune.