Therotaryrocket85

Ive got a bone stock 88 vert( see sig) and it still uses the mop and ive solely relied on that since i bought it, i also did so on my other 2 fb's. Well after reading all the threads on premixing and all i decided to give it a shot while still using the mop. I had about half a tank of gas so i put about 4 ounces in which is what i gathered to be about right on all the threads. I drove it about 15 miles and WOW it feels smoother, throttle response is smoother and more responsive. It idles like butter and i cant even feel it running, and my exhaust doesnt stink up the garage like it used to with that rotary funk. I just wanted to say that im very impressed and if anyone has doubts about it just try it on one tank full. You will do it from now on! Im a newbie to the fc's and in the past i always felt that the mop would take care of what it needed but i was bored and thought it would be a nice try, worst case scenerio it would smoke or something but wooo hooo does it make "stinky" run much happier.

jhammons01

Really??? All sounds good and from your post I'll try it as well. But, Why does it make the smell "go away"? I mean, isn't your MOP still pumping oil from the sump into the combustion chambers??? Wouldn't that burn and smell the same?

Just askin'

diagoro

placebo effect

Therotaryrocket85

Im not dumb enough to fall for a placebo effect, I didnt think it would make one lick of a difference so i went into this being negative but i was suprised. my car has the original untouched engine with 97k on it. The fact that its 100% original with that amount of miles on it is why i feel the premixing has helped. The car just runs happier now, its not in my head.


Im not too sure why the reaking smell has gone away. I wouldnt say it went away, id just say its not nearly as potent as it once was. Ive still got my cats so it wasnt that bad to begin with compared to my first gens. But now i can walk behind the car and not even detect an odor

68Sniper

iTrader: (1)

What kind of oil did you use im thimking about it as well and its 4oz to a tank right?

harley71105

I been driving 7's since 1984 and I have two 88 S4's...I just tried premix a few weeks ago and IT DOES MAKE THE CAR RUN SMOOTHER....It even cured my 3800 RPM Hesitation....I do it in addition to the OMP since I have not undone that.....I did a thread on this right after I noticed the difference....Placebo? Naaaaaaaaa....not one this........no placebo could have caused my secondaries to work.

frigidmonkey

how does premixing change the way the engine runs and responds?

harley71105

It would seem that the extra oil does a better job of causing the Apex Seals to seal even better and perhaps getting a little more compression just due to a "thicker" liquid in the engine....also, the oil would have to change in some way the way combustion itself is carried out....maybe a more even burn or whatever....the denser liquid dynamically HAS to make a difference.

iceblue

alot of misconseptions

Some things you need to know that 98% of people neglect from lack of knowledge of 2 stroke oil.

Yes it makes your exhoust smell differ and smoke a lil more. That is the smell of the 2cycle oil you are using. Differ brands and differ blends castrol based non castrol based and so on will all smell differ.

Make car run smoother and all and faster throttle responde.. I dont know about all that I didnt see that on my premix 88N/A Yes premix does burn betor then OIL from the MOP as well differ brands of oil will burn bettor then others. The 2 stroke oil will coat the side irons and so on a very good thing indead.

However it is still under theory stages but it is balived that the coating may allow the side seals not to seat fully against the irons thus creating a film bearier of oil and this allows fule to seap past the side apex seals and into your oil contaminating it.

The ratrio is 100:1 or one ounce per gallon of fule. You need to run higher octain as well for 2cycle oil lowers your octain level. N/A are tuned to run on 80 octain so this will even out the ratio very close to optimum octain leval. NOT on tubos they are designed base on 87 so premixing on stock boost will cause you to have to run 92+. Just for comparison purposes I run 101 octain in my 4stroke bikes and I run 120+ on my 2 stroke bikes however again 2stroke bikes are a true 2stroke engin remembering our octain leval is lower now form the oil but 2 stroke engins love as high of octain as you can give them. A rotoary is not a 2stroke engin but does get rotor face cooling in the same manner as a 2stroke.

This is what I see evryone overlooks. YOU! need to mix your gas in bottles befor poring it into the tank. Put the amount of oil you need for each bottle of gas and fill it up. This is the only way you will get a proper mixture. Now pore it into the tank and repeat untill full tank. If you do not do it this way the oil and fule will NEVER mix properly or get a correct ratio. Your just half assing your improvment modification and defeating the purpos of it.

A member named PAT has posted somewhere I think it is in the archives actualy of his take on premixing. He used the MOP but made it shoot premix insted of motor oil. I like this method combined with the old rotary MOP design using a smaller jet and leaving the pumping on all the time. www.racingbeat.com does sell these jets if you want to give them a call.

edit: I do not sugest castrol based 2cycle oil. It causes alot of carbun I mean creats alot. This oil is great on 2 cycle engins such as go-karts that do not have a power valve and get rebuild weekly as 2stroke race engins or any race engin does. My oils of choice are Klots, Redline and for castrol based Blensol Gold label.

M.C. Language

I love my pre mix mobile! when you know you are gonna be driving it hard throw a little extra 2 stroke than you normally would and **** she's Soo bloody smooth to 8 grand!
s5 turbo~

frigidmonkey

dont get me wrong, I premix too, I just never noticed an increase in performance, just in peac of mind, maybe its because I used MMO instead of 2-stroke oil

Digi7ech

iTrader: (1)

I just pour the premix in before I pump and then let the 10 gallons of gas to it's own mixing.

TII's can run 87? No one here does that or in their right mind would. We always use 91+

Also running premix in the gas is better than the stock omp system because you are pushing the premix out through a 40-50psi injector with a great spray pattren compared to a small drip hole with no pressure.

The 100:1 ratio is for someone which has completely disconnected the OMP. If the rod is still attached to your TB then your over mixing.
I don't know the ratio for premix with it connected but I have mine unhooked but still running and I do 1 ounce to 1 gallon. I think that's around 120:1 but I suck at math.
I think they say do around 200:1 if omp is still on. Not sure though.

I know I'm premixing the hell out of my car but I like to be on the extremely safe side when it comes to rotaries. My buddies 12a Blowthrough turbo's OMP failed and junked the engine

Turbo II-FB

marvel oil kicks ***

diagoro

man thats a little extreme dont you think?

BlaCkPlaGUE

damn straight, not to mention unnecessary.

Pouring in the 2stroke first and then filling up mixes it all up really well, not to mention the over-all motion of the car swishing the gas in the tank.

RylAssassin

The only fear ive had with pre-mixing is with clogging the injectors over time. I mean with all that oil going through the injectors doesent it eventually get clogged up and cause poorer fuel atomization?

Therotaryrocket85

That was actually the key reason why i never tried it before and ill tell you why. When i was 14 i bought my first rx7( the gsl-se) and it sat in the garage until i was old enough to drive but when i was 15 i autocrossed it and a guy out there who had several rx7s told me on the next tank full to run a quart of oil in the gas. me being naive and not knowing this forum was around or where i could get any concrete advice i tried it and my se coughed and hissed the entire tank until i finally siphoned it out, replaced the fuel filter and ran b12 chemtool through it and then the car ran normal again. So i never tried anything other than b12 in my gas ever again on any of my cars. Then i saw all this premixing stuff on here and realized well heck the reason i had problems is cuz he told me to use full out motor oil and a whole quart! The way i see it with what ive read on here is that 4 to 8 ounces on a full tank of gas in a 2nd gen n/a that is still using its mop is perfectly fine. So i tried 4 ounces on my half a tank and figured that since im using hte right stuff now and that its pretty diluted that i shouldnt encounter the same problem i did several years ago. But i do wonder if the car sits for any length of time or if light driving will effect the fuel injectors but from what ive read througout the forum here that isnt an apparent problem. If it is then it should be mentioned more lol.

staticguitar313

iTrader: (2)

Cool ****, i'm going to srat premixing as a safety net b/c oil appears to be laeking (slowly) from around the OMP area, not good.

RotaryEvolution

iTrader: (30)

heh, no one ever believes us when we say premixing is good for your rotary...

i have only seen a few rare instances of it fouling a fuel filter due to the oil stripping the dirt and grime from the tank and plugging the filter, but a filter is what? $24? piece of mind and knowing that i am not merely lubricating the center of the apex seal and protecting all of the combustion seals is well worth it to me and seeing the after affects of a driven hard engine after break in boosting immediately with new seals on old housings with premix is enough for me to never go back.

iceblue

Absolutly not. If you do it right. Your oil will NEVER mix properly in the tank like that EVER what will actualy happen is the oil will seperate from the fule causing you to run lean. Just do it right. If your going to premix it is sugest for track cars and you mix in bottles just how its done. One thing to consider are these ar not 2stroke engins and the lube ratio is not as critical meaing you wont be as close to as easly to smoke a motor.

Digi7ech - The ratio with no OMP is 100:1 that is one ounce per gallon see 1ounce 100 and 1 one gallon. You are mixing 120:1 or 1.2oz per gallon. To much with MOP. But just causing your car to run rich. Best way to tune or only way to tune is to use a hydro meter or a wide band. This is b/c the stock MOP system can cause you to run rich and lean and inconsistant not desirerable for a race or track car but serves ideal eas of use for a street car.

1990RXHeaven

Wow, maybe ive been overmixing cuz ive been doing 1 oz per gallon (a lil less actually - like .75oz per gal) with my MOP still on. The car runs okay but I found that good stuff like castrol and my new fav. valvoline high rpm formula is best cuz cheap "road tech" wal-mart stuff will make your car sputter an die at idle. Or so I tought.

Was the dying at idle due to cheap premix or just overmixing? Should I only do like 8oz per fillup or a full 15oz or what? How big is my tank exactly? I thought it was 15gal. but i just put in over 15gal. the other day. (1990 gxl btw) Also.... Which and where can I get a new good fuel filter? just wonderin

harley71105

Concerning premix and not driving the car regularly....as long as you drive the car on a regular basis it should be fine...however if you gonna let one set up I would not recommend premix....you ever had a boat that sat around all winter....well....sometimes you have to disassemble the engine to clean out the gunk....(hardened oil)....that's why even in the winter I take the boat out for a spin at least once everyother week to keep it all fresh....I freeze my *** off but I dont have to worry about rebuilding the engine from gunked up 2 cycle oil....

iceblue

Runing it regulary or strting one up from cold seasing does help the motor but does nuthing for your premix. The reson you dont let premix sit is b/c the oil causes the fule to go bad much!! faster then normal. So yes your right dont premix if you plan to let your car sit on ocashions not good at all.

J-Rat

iTrader: (2)

My car doesnt smoke at all, nor does it smell any DIFFERENT.

A few spelling errors here, let me help you:

Ratrio = ratio
fule= fuel
octain = octane
tubos = turbos (I assume)
engin = engine
rotoary = rotary

riiiight, thats exactly how I plan to FUEL my ROTARY from here on out.

oh, and its PURPOSE.

What is CASTROL BASED 2 CYCLE OIL!?! More spelling help here, hold on:

Carbun = carbon
creats - creates
engin = engine

If you are going to try to act smart, the least you can do is communicate smartly. Right now you are coming off like a little kid.

Rat

staticguitar313

iTrader: (2)

Oh Jarret you slay me, lmao