breaking in rebuilt engine
 

i just rebulit my 4ag with low comp, blah blah blah.
anyways first time going boosted.
i wanna push about 2 psi to break the engine in for the first month or so. then start upping my boost.
not quite sure how though. do i just unscrew the actuator.

my worry is that ill slap it on for the first time and it will be at like 10psi or something.

Re: breaking in rebuilt engine
 

slowly get it to redline, then let it decel fully getting into high vacuum. do this a few times and your rings set and the engine is broken in. It's easy to argue its broken in after idling 30 secs.

Re: breaking in rebuilt engine
 

i wouldent run boost on it at all to break it in though. at least 2 oil changes within the next 100-200 miles

Re: breaking in rebuilt engine
 

Do some high vacuum pulls then rape it at full boost. :y

Re: breaking in rebuilt engine
 

Break it in hard. http://www.mototuneusa.com/break_in_secrets.htm

Re: breaking in rebuilt engine
 

That is interesting ----. it makes sense though. Good article /\

Re: breaking in rebuilt engine
 

most the local imca racers around here recommend letting it sit at about 3k for about 15 minutes then change the oil and run it like regular. there motors can last anywhere from 1 lap to 2 seasons, so its kind of a toss up on wether it works or not.

Re: breaking in rebuilt engine
 

I usually just drive the car, make sure it's tuned and do some higher rpm pulls and decel with the clutch engaged a few times.

Re: breaking in rebuilt engine
 

---- THAT ----...

Some partial throttle at various loads for 20 minutes or so... then tune into boost... ---- we were RAPING my POS not 3 hours after it was lit.

I agree with the break em in hard and they run hard train of thought

Re: breaking in rebuilt engine
 

I agree with bigdaddy, i too just rebuilt and boosted my 4age , havent driven it yet, hopefully over the weekend. Didnt change my piston rings though . Gonna take it easy for like 2 micro seconds then i will just go into "---- it "mode and take that bitch to redline.

Re: breaking in rebuilt engine
 

Extra rpm and no load till it warms up, then give it hell!

Re: breaking in rebuilt engine
 

Dude that bitch in your avitard makes my cock hard every time i think about her criss cut jaw slobbibng down my ---- tool.....

Re: breaking in rebuilt engine
 

Me too dude, me too.

Re: breaking in rebuilt engine
 

so no boost then.

only problem is i sold my trd 4 to 1 header

i still have stock manifold but sold the stock downpipe. hahah.

so im still making a turbo manifold and downpipe. (i wont have an exhaust until the turbo mani is done)

could i run 0-1 psi? just balance it out as if its n/a?

Re: breaking in rebuilt engine
 

watch you boost gauge? keep it out for a few pulls and then let it rip after that

Re: breaking in rebuilt engine
 

If you dont "break in" that piece of ---- with the turbo on it, Black baby Jesus is going to come fly to your house and kick you in the niiiiuuutzzzz

Re: breaking in rebuilt engine
 

like everyone else said:

keep the turbo on the car,
make a few pulls at various engine loads, watch the boost gauge to stay out of boost. Do like 5 pulls, 10" 5" 0" up to redline and then let it wind down at max vacuum. It should increase for few times you do it. Now your rings are seated and your ready to beat the ---- out of it! If you used new bearings, i would run mineral oil untill your first oil change at about 500 miles.

Re: breaking in rebuilt engine
 

just dissconnect the ic piep from the throttlebody and your golden. no watching boost and then do the break in. then make some power

Re: breaking in rebuilt engine
 

You could ---- up the turbo like that.

Re: breaking in rebuilt engine
 

yea you dont wanna smoke turbos like that. Just get either an adjustable wastegate or get a low psi spring for it and run like 4-6 psi boost

Re: breaking in rebuilt engine
 

ok do i have to have an adjustable wastegate or can the stock actuator be adjusted.

damnit this sucks

Re: breaking in rebuilt engine
 

its reallly not that hard to stay out of boost.. i dont see what the problem is? just dont push the pedal down all the way

Re: breaking in rebuilt engine
 

no it's not that hard at all. if you really can't handle foot control, and internal, do this:

http://www.boostedmiata.com/exhaust/wired_wastegate.jpg

Re: breaking in rebuilt engine
 

Why not just leave the flapper unhooked, the exhaust should be enough to blow it open.

Re: breaking in rebuilt engine
 

when v2 gets put in, this is what will be happening with it... start it up let it run till its fully warmed up. check for leaks and ----. maybe do a compression check after that warm up, take it for a trip around the block. then park and make appointment with tuner and dyno to break that ---- in proper with quick street pump gas refresh then some C16 dyno action.

i wouldnt suggest even starting the car if it didnt have a wideband on it though...

Re: breaking in rebuilt engine
 

true, just a precaution.

Re: breaking in rebuilt engine
 

yeah good idea. i didnt think of that.

the other idea i was just thinking of right now was to just let the boost bleed off before it gets to the throttle body and right after the intercooler.
but i do think the flapper idea is better.

Re: breaking in rebuilt engine
 

no, not a better idea, you'll have no way to really measure how much boost you are making, you could easily overspin the turbo.

disconnecting the wastegate prevents more than a few pounds (depending on the size and displacement) to ever be built.