Pre Mixing
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From: TEXAS
Pre Mixing
So here it is..........any of you guys out there premixing and how many ounces per tank full and what kind of oil. Now if I decide to replace my oil metering pump I understand that the small little washers underneath the rod are actually the adjustment. How many washers should I use. I finally painted my car.....this weekend I am installing the new lowering springs and after that I'll post some pictures to share with you guys if I learn how to post a picture here.
Anyways many thanks
David
Anyways many thanks
David
Interstate Chop Shop CEO
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From: Running an Interstate Chop Shop
From a very recent thread (remember the search button is your friend)
https://www.rx7club.com/forum/showth...hreadid=225649
https://www.rx7club.com/forum/showth...hreadid=225649
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From: ma
1 oz per gallon, that's what I told. I dumped 8 oz for the first time on Saturday for 8 gallons. I was nervous, people walking by thought I was insane, but oh well. I did notice some smoke. I am removing the cats this week for sure and adding hi=performance spark plugs. Should i use 94 octane or lower?
Joined: May 2002
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From: Ottawa, Soviet Canuckistan
94 octane doesn't hurt, but unless you're running boost, it doesn't actually help any either.
Be easier on your wallet, go for 87 octane until you win the lottery or add turbos
(octane just prevents pre-detonation caused by high-pressure, ie: boost)
Jon
Be easier on your wallet, go for 87 octane until you win the lottery or add turbos
(octane just prevents pre-detonation caused by high-pressure, ie: boost)Jon
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Use the lowest octane you can get and get your MMO at KMart, it's cheaper. I buy the 32 oz bottles and use 8 oz per tank, with the OMP still hooked up. I keep an empty container in the car to measure out 8 oz per tank full. Did you know that one of the magic things about MMO is that you need to put the plastic container in the shade in order to see the oil level? Try it, you'll be amazed. I like treating the car good, but I have to agree with jtm, you feel pretty weird pouring this red stuff between two red plastic bottles outside the gas station. But I haven't been stopped yet.
Ray
Ray
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From: Running an Interstate Chop Shop
Originally posted by jtm7878
1 oz per gallon, that's what I told. I dumped 8 oz for the first time on Saturday for 8 gallons. I was nervous, people walking by thought I was insane, but oh well. I did notice some smoke. I am removing the cats this week for sure and adding hi=performance spark plugs. Should i use 94 octane or lower?
1 oz per gallon, that's what I told. I dumped 8 oz for the first time on Saturday for 8 gallons. I was nervous, people walking by thought I was insane, but oh well. I did notice some smoke. I am removing the cats this week for sure and adding hi=performance spark plugs. Should i use 94 octane or lower?
I was using the Universal 2-stroke at Wal-mart until the other day I found a 16oz bottle that was cheaper than two 8oz walmart bottles. It is TC-W3 or something like that. I know it doesn't answer your question but at 1.07 for 16oz, I thought it was a pretty good buy.
Here are a couple of paragraphs out of HPBooks "How to Modify Your Mazda RX-7" which IMHO everyone should have on their shelves who owns an FB.
The reason they mention octane is that they were running the lowest octane they could find in their Camel Light race-prepped engine. With running premix they found that the octane went down by minimum of another point (ie 87 dropped to 86) while everyone else in the beginning was running higher octane.
BTW, my gas doesn't stay in the tank long enough to settle out of suspension and I haven't had a problem yet using mineral based oil.
Here are a couple of paragraphs out of HPBooks "How to Modify Your Mazda RX-7" which IMHO everyone should have on their shelves who owns an FB.
In some competition applicatoins, it may be necessary or desirable to remove the metering oil pump. If this is done, oil must be mixed with the gas. The resulting premix should be in a ratio of between 100:1 and 160:1. With the rpm levels and engine loads inherent in Camel Light racing, Downing/Atlanta race engines are usually fed a diet of 100:1 premix, which is approximately 6-1/2 ounces of oil per five gallons of fuel. Such a ratio is not appropriate for race engines that are not as highly stressed.
Street engines fed an oil-rich premix will experience an increase in deposits on sparkplug electrodes and possible fouling. For street driving and autocrossing, oil should be administered through the metering pump. (Keep in mind that increasing the percentage of oil in the premix reduces fuel octane.) Premixing is suggested only for endurance-type racing where oil-pump failure could prove catastrophic due to engine operating speed and load.
Note that the oil-metering pump is capable of providing a minimum (oil-rich) fuel-to-oil ratio of about 150:1. Premixing is therefore required if it's necessary to run a richer oil mixture, or up to 100:1.
Jim Mederer says to use a synthetic oil for premix because mineral oils settle out of fuel if it (the mixture) sits for very long. Best choice is a "two-stroke" synthetic which is a good lubricant and it stays in suspension. However, Rick Engman uses mineral oil exclusively and is totally pleased with the results. He states, "Synthetic oil doesn't burn, so it will not have the same affect on reducing fuel octane as does mineral oil. Synthetics also tend to leave the sparkplugs with more of a residue, thus leading to fouling. We get excellent life out of our seals and we don't have a problem using mineral oil in our premix. Maybe I should rephrase that -- if we do have a problem, I don't know about it."
Street engines fed an oil-rich premix will experience an increase in deposits on sparkplug electrodes and possible fouling. For street driving and autocrossing, oil should be administered through the metering pump. (Keep in mind that increasing the percentage of oil in the premix reduces fuel octane.) Premixing is suggested only for endurance-type racing where oil-pump failure could prove catastrophic due to engine operating speed and load.
Note that the oil-metering pump is capable of providing a minimum (oil-rich) fuel-to-oil ratio of about 150:1. Premixing is therefore required if it's necessary to run a richer oil mixture, or up to 100:1.
Jim Mederer says to use a synthetic oil for premix because mineral oils settle out of fuel if it (the mixture) sits for very long. Best choice is a "two-stroke" synthetic which is a good lubricant and it stays in suspension. However, Rick Engman uses mineral oil exclusively and is totally pleased with the results. He states, "Synthetic oil doesn't burn, so it will not have the same affect on reducing fuel octane as does mineral oil. Synthetics also tend to leave the sparkplugs with more of a residue, thus leading to fouling. We get excellent life out of our seals and we don't have a problem using mineral oil in our premix. Maybe I should rephrase that -- if we do have a problem, I don't know about it."
The reason they mention octane is that they were running the lowest octane they could find in their Camel Light race-prepped engine. With running premix they found that the octane went down by minimum of another point (ie 87 dropped to 86) while everyone else in the beginning was running higher octane.
BTW, my gas doesn't stay in the tank long enough to settle out of suspension and I haven't had a problem yet using mineral based oil.
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From: ma
Guys - I am driving a 1988 Mazda RX7 Turbo II (10th Anniv. Edition) I'm confused as to whether or not I should use 87 octane or 94 Octane? I am dumping about 1 oz of oil TCW-3 2-Stoke per gallon of gasoline... This is what I read on the web site - To rich?
The other day while I was dumping in the oil a man walked by and looked at me like I was nuts! Funny, I'll drive around till I see an empty gas station, but my luck, someone always pulls in and pumps their gas next to me. Perhaps they like the car???
The other day while I was dumping in the oil a man walked by and looked at me like I was nuts! Funny, I'll drive around till I see an empty gas station, but my luck, someone always pulls in and pumps their gas next to me. Perhaps they like the car???
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From: Running an Interstate Chop Shop
Yup, if you're running boost (ie Turbo) you need to run the 93 octane (you have 94 in your area?).
1oz to 1 gallon seems really oil rich. Like I wrote in my post the omp can only inject at most a 150:1 mix and that would be holding it wide open.
A 1oz to 1 gallon mixture is less than 100:1 figuring that with a 16oz bottle of TC-3w it says it is 50:1 when mixing the whole bottle with 6 gallons. So at 100:1 that would be 16oz to 12 gallons. I think you see what I'm getting at.
1oz to 1 gallon seems really oil rich. Like I wrote in my post the omp can only inject at most a 150:1 mix and that would be holding it wide open.
A 1oz to 1 gallon mixture is less than 100:1 figuring that with a 16oz bottle of TC-3w it says it is 50:1 when mixing the whole bottle with 6 gallons. So at 100:1 that would be 16oz to 12 gallons. I think you see what I'm getting at.
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From: Running an Interstate Chop Shop
Oh, and don't worry about bystanders watching you dump oil in the gas tank. They just don't understand
I enjoy having people watch me dump the oil in and watching their reactions
I enjoy having people watch me dump the oil in and watching their reactions
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From: ma
I use 94 Octane from Exxon Mobil - Is it okay to run an octane boost? I was told not to. what do u guys think? Funny, on Thanksgiving a guy approached me and asked, what are you doing? I just said, you would not understand as I dumped the oil into the gas tank
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Today I tried for the first time the MMO in the tank deal and it was funny how I could relate to the nervousness of people's reaction described above. But I said what the hell, and placed the new unopened bottle of MMO on top of my car while opening the gas tank cap, then opened the bottle, broke the seal and dumped 6 oz of it in the tank (for 8 gallons, looked around realizing that if anybody was actually watching they would probably think I'm nuts... the gas station was fairly full, but nobody seemed to notice... btw no smoke at all afterwards, and I'm running the omp as well.
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From: ma
I wish there were an easier way to measure etc. I find myself running #'s ($20 / by $1.78 per gallon =11.235) ounces of oil needed. I was told 1 oz per gallon. It measuring the actual amount of oil etc - I can't find the 2-stroke sold in bottles of 6oz, 8oz, 12oz etc...
I'm also noticing hesitation when shifting into the next gear @ hi-RPM's. Just changed the spark plugs, changed the fuel filter and oil change. I'll search around. Hope the hesitation has nothing to do with premixing. that will suck
I'm also noticing hesitation when shifting into the next gear @ hi-RPM's. Just changed the spark plugs, changed the fuel filter and oil change. I'll search around. Hope the hesitation has nothing to do with premixing. that will suck
The measuring is a pain, for sure. I buy the 32 oz bottles from walmart, then measure out 8 oz per fill up using one of the empty bottles. But its not convenient and whenever I'm at the gas station pouring that red liquid between two red plastic bottles next to the gas pump, I start to worry about being suspected of terrorism. Anyone have a better way?
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From: ma
@ WALMART today I purchased a funel-like-type-device and it reads the oz right on it. It seals @ the top and the bottom hose so you dont spill while driving. Just dump the oil in - reseal it and presto! your done. I find this a lot easier now. I just got it for $2.00 - (holds 12 oz of oil) You can find it near the motor oil. Also, the hose-end is sort of long, but oh well. It does a quick-clean job.
<RAY GREEN> LOL about your terrorist comment. I agree with you man.
<RAY GREEN> LOL about your terrorist comment. I agree with you man.
Sorry, I should have been more clear. I still have my OMP hooked up, so the MMO is just to make me and the car feel better, which it does. I get 4 x 8 oz out of each 32 oz MMO bottle, which is the cheapest way to buy it that I can find. Thanks for the tip on the funnel jtm, I'll pick one up. Sounds a lot easier!
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From: ma
I am sticking with the formula 1 oz per gallon - car seems to run good. And that funnel I mentioned does work the bomb... If you have troubles finding it, let me know. I may be able to get an ITEM # so you can buy it online via walmart.com
jtm, is that 1 oz per gallon WITH the OMP hooked up? It doesn't smoke except at startup, right? And your engine oil doesn't start going up too much, right? Shoot, it costs more, but I'd put in 16 oz per tank if it made the car happy. Also it would be easier to measure, could split the 32 oz bottle.