Drift_Kid

ok so i JUST got my car back from geting rebuilt, i used the atkins 2mm rebuild kit C for my 89 TII. along with switching to slightly used S4 houseings but keeping the S5 rotors, i have a new e-shaft, did some mild-medium porting, upgraded to 750cc secondarys, and im runing a 3" - 2 1/2" DP.

my quistion is if i get the recomended 1000 miles on the motor with in the 4 days would it be an adiquit amount of "time" for the rebuild to settel in? the event is going to be a gymkhana "drift/autocross" and im wanting to break in my motor properly to ensure a long life. but i cant pass up this event! but... if it will be harmfull to my motor then i guess i'll have to pass up my pre registration.

Fitness Stain

one day of fun

or several years of driving your car and having fun ... choice is yours

FC_DRIFTER

Yeah.....I'd hold off on the event and work on breaking the engine in smoothly. It takes time for the boost break in. A couple houndred miles every PSI. I just had my TII rebuilt and ive got about 2,700 miles on my rebuild. I'm just finishing up the last of the Boost break in, still running stock boost.

keivi

Time for a roadtrip my friend. Thats what I did to break in my rebuild. It gets the miles on the car fast.

uRizen

iTrader: (2)

Great idea. There's a tuning event going on the 16th. Come visit us in Minnesota for the event and head back, you'll be good to go.

Bukwild

yeah road trip 500 miles south and then turn around. When you get home you should be alset. One of my rebuilds ran shitty for the first 500 miles then I got of the highway to get gas and shut it off. When I turned it back on and drove down the on ramp it was like it was a different car. So I bet its not a magic number its more of a feel.

Houstonderk

iTrader: (3)

Yea i've heard that long roadtrips on the highways at cruise does a good breakin.

ddub

I thought the general consensus was to VARY your rpm's during break-in? Seems like just driving on the freeway for hours at the same speed/rpm wouldn't be the best.

That being said, though, there are enough people out there doing idle break-ins and then just going all out. Is this the best idea? Probably not for longevity. I think the main issue when doing this is you get more blowby by not breaking it in "properly" according to the rotary engine builders. But people do this, and it seems to be fine. I, however, will always do a proper break-in. This is especially true if you have new bearings.

Wankel7

Dude , just rent a car.

You know it is wrong to race it...

Your just posting on here to hope that maybe just maybe somebody will say it is ok.

Don't even think about racing it if you have new bearings!


Why did you get a brand new eshaft?

WonkoTheSane

iTrader: (2)

ROAD TRIP! Just make sure you vary your speed on the highway, and jump off and take a back road occasionally. I've always heard of break in being done in miles, never in time. If you drive your new motor for 250 miles, then let it sit for a month is it any more broken in? Nope. Stop posting, start driving. NOW!

sleejay

unless your gonna drive 2500 city miles in 4 days, dont race. idiot.

3RotorRocket

better safe then sorry IMO

rotaryracer1

iTrader: (1)

listen to all of when we say not to race. i just got my rebuild from atkins and jason told me to not boost at all or rev above 3500rpm for first 500 miles and then after 500 its good til 5000 rpm with no boost then after 2000 miles it would be good to go.

bigdv519

iTrader: (3)

I say go race it. Make sure to rev it to 9K.

If you do this, I can almost promise you that your next rebuild will be much more appreciated and you would have gained more patience with your break in procedures.

I just wasted 3 minutes of my life posting here...what are you doing with your time.

Drift_Kid

ok guy well the motor isnt done yet and ther are some bugs to work out "the injectors might not be working properly" so im not goiong to chace it. but if i had driven the car for 2k miles didnt boost for the first 500, kept the rpms down, eased into the boost till 2kmiles, did in town and free way mileage would it really matter that it was in a short time?

RoadRaceJosh

Like the others already wrote. It's mileage, not time that breaks in the engine. Having said that there is some benifit to the heat cycles, but not nearly as much on a rotary as a rebuilt boinger.

Also you must have the car tuned properly! I hate trying to break in an engine in an unknown/untuned state. I'd put it back stock, break it in, then put in the larger injectors and tune it properly. I sure hope you saved enough money to afford proper tuning.

Now I have a question. Do any big time engine builders recommend a little premix during break in (say 150:1) or would it keep the apex seals from wearing in as quickly?