BlueRenesis82

I ran with 87 on the track last time, and no issues. Any other people who run regular grade?

L8APEX

not that i know of. I think a couple folks like to run 89, but I could be wrong about that. I know AC8 also ran a premix at TGPR, did it help...

SilverEIGHT

I missed the premix discussion. Would someone please explain to me. Robert mentioned something about 2 cycle oil mixed with the gas... please expand on.

L8APEX

as i understand it, it creates a better seal in the combustion chamber, I cant remember the rest of the benefits, IIRC it gives a better seal at very high, sustained RPM's, like those seen at TGPR. Maybe OD, or AC will chime in.

SilverEIGHT

And what would the mix formula be?

BlueRenesis82

I thought it was a quart of oil per full gas tank. IIRC

L8APEX

AC did 3 ounces for one tank.

SilverEIGHT

Interesting! I'm looking forward to OD and AC following up. Wonder if this is something we should do at RA?

olddragger

iTrader: (3)

Ahhhhh, the pre mix discussion----I like.
Ok here is what I think. The renasis has an oil injection pump---right? Yes it does. the purpose of the oil injection pump basically is to inject oil into the COMBUSTION chamber. Why? to help lubricate and seal the rotor seals. OK --there is some discussion about if our stock oip injects enough oil for substained high rpm driving--such as track days. Racing Beat makes a mod to increase the secondary piston in this pump by 30% for engines that have been FI'ed. WHy? because the stock pump does not pump enough for the extra stress at higher rpms. Since I cant get the oip mod(and really dont want it) I have chosen to do pre mix. Just like a 2 cycle engine.
Now I dont use a lot---5oz's per tank. Thats 5 oz's per full tank.Approx 16 gals. I swear it does make the engine smoother--increased power--I dont know, maybe just a bit but it is not proven--but idle sure is smoother.
Use a good quality pre mix( I use a yamaha full synthetic motorcycle racing pre mix) put it in the tank BEFORE you gas up.
That percentage of pre mix is guaranteed to not NOT HARM THE CAR, engine or cat. It feels better and it may really help the longetivity of your engine. Some of this engine reminds me of a 2cycle.
Also always use the highest octane you can in this car as the ecu will pull timing for lower octane. The car can run fine but your power will be down a little. You may not even feel it. But it will be down.
olddragger

SilverEIGHT

OD, will you run it at RA?

valpac

iTrader: (2)

From Racing Beat:

This means that, when using this modification in street applications, there is little change in oil consumption up through cruise power - but extra flow is there at higher RPM and load when you need it!

This modification is ONLY intended for boosted engines or those engaged in continued hard use (road racing, etc.). Mazda has established the correct flow for the stock engine in street use.


Ok. More oil is needed ONLY under those extreme conditions (racing, boosted mods) not daily use. I might try pre-mix at RA but thats a big maybe.

Plugs are damn expensive for this car and oil fouling is not something I want to accelerate. And before anyone goes off by saying the oil is synthetic and it fully burns with no ash and no fouling, more oil burned in the combustion chamber is more oil burned, period.

I think you are doing your engine a disservice if you pre-mix for daily driving or too often. It just doesnt need the extra.

L8APEX

Hey Blue,

I was just looking at the map for Road America, it is over 4 miles long, how long is that front straight, and what kind of speed do you see in the 8 there? I would love to come drive that one day, it looks like a lot of fun, and challenging too.

SilverEIGHT

L8, I might like to go with you.

L8APEX

I don't know when it will happen, probably 2007, but I have watched the races at that track on TV, and looking at the course map, it loks to be fun, and it is long as hell, over 4 miles, 14 turns, some of them are really sharp. Only problem is, it is a long *** way away, but would be worth it, especially if I was not the only one going.

EDIT:, yep, 1044 miles. that is about 4 tanks of gas, could be done in one day if need be, and would be a long haul. I'd be up for it, should the timing work out right.

SilverEIGHT

It would be really nice to have a contengency of 4 or 5 cars rolling into the track for a two day event! I'd like to see if I could manage to take a vacation around that. Four miles... WOW! Makes TGPR sound like a GoKart track!

L8APEX

TGPR IS a go kart track. But lots of fun in a car too.

Stop&TurnFreak

Don't confuse length with complexity.

olddragger

iTrader: (3)

Val-- agreed --pre mix is not for normal daily driving, although I know people that use a lower concentration for daily driving. I dont. But for the track you can bet your bottom dollor I do. Plug fouling is a non issue on the track (should be at least) and the pre mix will not add to that issue as long as you do the regular de carboning thingy's. Pre mix probably could add to problems if there are carbon hot spots in the combustion chamber.
One other thing---the "new" plugs we all are getting are a heat range hotter. Since I have an almost new set of the colder range I may swap to those for the track sessions. Thoughts?
Road America---damn that would be a trip!
Hey Val do you still have that apperance(sic) kit? Lets talk at RA. I know you need the money so you can get those unorthodox pulleys and to continue to buy all that wax!
rotor on
olddragger

L8APEX

length has nothing do do with it, the sets of what seem to be tricky turns do. It was just my noob's interpretation of the course layout, I don't claim to know what I am talking about.

valpac

iTrader: (2)

With some people experiencing carbon build-up do you think it wise to add carbon (in the form of additional oil) that may/or may not get burned up even with hotter plugs? Not me.
Still have it. Phlash has also voiced an interest in it. Let the bidding begin

BlueRenesis82

I really like Road America, normally on the front and back straight I end up at the top of 4th gear right around 125-130 ish. The back straight is actually a lot more fun because you come down into a very heavy braking zone and have a much sharper turn than in turn 1.

If some of you SE guys would like to come up we always have a great time at the track! I have been trying to recruit people to join the club.

SilverEIGHT

What is the date and is it a NASA event?

L8APEX

then you will like the braking zone for turn 10 at RoadAtlanta. It sounds a lot like that. Down a hill, hard on the brakes from well over 110.

legokcen

I do in normal everyday driving. Usually get high grade for a track day though.

olddragger

iTrader: (3)

On the back straight my highest speed is redlined in 4th(about 125mpg give or take a few) I anticipate with my new drive ratio that I will need to go into 5th on the back straight.
Val,
I dont think most of our carbon problen is from oil. Its from that unburnt stuff from the rich a/f mixtures we have to live with. However I do agree pre mix for everyday driving is unnecessary. Bidding ---agggghhhh
olddragger