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Old 04-09-2009, 04:37 AM   #1
Thug Nasty
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Default Hybrid break-in

So I finally finished my hybrid build. It basically consists of: EJ257, 2.0 heads, Helix 264 cams and valvetrain, stock wrx turbo, 750cc injectors, walbro, tgv deletes and all the normal bolt ons.

I have a UTEC. For my break in, I loaded a TXS base map, enabled open loop and speed density, changed the injector size, and ran a line from the turbo to the wastegate (bypassing the BCS) to only run wastegate boost.

Start up idle is a little rough, probably because of TGV deletes. Once it get warms up, idles normal. My temps and oil pressure is good and normal. I have been staying under 3500 RPM and very light on the throttle, haven't hit boost. I'm at about 40 miles right now. I was planning on doing this for 500 miles or so, then increase the RPM and light boost. I plan on changing oil at 100 miles, 500 miles and 1000 miles. Then at 1000, a power tune and begin regular oil change intervals.
Does this sound like a normal break in?

I have noticed when driving and coming to a stop, the RPM drops, like below the middle line between 0-1000 RPM and kinda stutters. Is there a way I can up my idle a bit to fix this? I know I'm running very rich right now and everyone can definitely smell it haha, but I'm guessing this is fine till it's all broken in and I can get a tune?

Does this sound about normal? Any suggestions?
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Old 04-09-2009, 10:18 AM   #2
crav3s2k
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Yeah thats a normal break in. My mechanic wants me to drive 500 miles then do an oil change and then another one at 1000. Your RPMs are dropping probably due to your cams. The same thing happens to my friends wrx and he has hybrid build with BC 272 cams. Sounds pretty normal to me
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Old 04-10-2009, 12:40 AM   #3
Thug Nasty
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Awesome. Thanks for the reply. Is there any way to fix this dropping RPMs due to the cams? Maybe be increasing idle speed?

Any other comments? Thanks.
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Old 04-10-2009, 12:52 AM   #4
Chi_San
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When I saw the thread titile, my imagination invented an image of a 2 liter block with 2.5 heads breaking into your house and stealing stuff.

What kind of oil are you using?
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Old 04-10-2009, 12:55 AM   #5
crav3s2k
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Quote:
Originally Posted by Thug Nasty View Post
Awesome. Thanks for the reply. Is there any way to fix this dropping RPMs due to the cams? Maybe be increasing idle speed?

Any other comments? Thanks.
Tune after you break in 1k miles
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Old 04-10-2009, 08:56 PM   #6
Thug Nasty
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Quote:
Originally Posted by Chi_San View Post
When I saw the thread titile, my imagination invented an image of a 2 liter block with 2.5 heads breaking into your house and stealing stuff.

What kind of oil are you using?


For my first 100 miles, I'm just using some cheapo 5w 30. After my next change, I'll switch to Castrol Syntec probably or Amsoil
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Old 04-12-2009, 11:41 AM   #7
Fongers
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Stay with dino for the whole break in man. Switch @ 1K...
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Old 05-14-2010, 03:10 AM   #8
Flyin_Hayn
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i would stick to the conventional oil for the first 3-5k.. let those piston rings get nice and sealed up.
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Old 05-14-2010, 04:59 AM   #9
frayz
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Id be adding some light boost straight away. Drive that thing too soft and the rings wont cut in and you'll end up polishing the bores and getting oil blow by.

Cylinder pressure is what cuts the rings. Without it, theyre not working.
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Old 05-14-2010, 10:52 AM   #10
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^Agreed, just not too much boost, i think i was limited to 5 psi during my break in as well as a max of 4000rpm...the drop in RPM while coming to a stop is normal. my 280's drop quite low, i usually have to blip the throttle when i clutch when braking. Keep an eye on the oil!

Grats!
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Old 05-14-2010, 11:11 AM   #11
mick_the_ginge
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Get a quick tune now at wastegate boost to resolve the running rich issue and I bet the rpm's falling is tuning related as well. Spin the car up to redline in increments on the dyno with this tune it will help the rings seat far better than daily driving.

If no dyno access then you will have to illegally do it, be safe.....
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Old 05-14-2010, 02:28 PM   #12
kellygnsd
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Quote:
Originally Posted by Thug Nasty View Post
Awesome. Thanks for the reply. Is there any way to fix this dropping RPMs due to the cams? Maybe be increasing idle speed?

Any other comments? Thanks.
a good tuner can tune that out and a slight increase in idle rpm couldn't hurt either.

IMO the tune you break your motor in on is just as important as the one you plan on making good power on if you want good ring seat and long engine life.
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Old 05-14-2010, 09:56 PM   #13
slowmike
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You can seat the rings within the first 50 miles if you drive it like an on/off switch, boost then decel as much as possible. Use the engine to slow you down rather than the brakes. Keep the RPMs below 5000 for the first few hundred miles and you'll be fine
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Old 05-14-2010, 11:34 PM   #14
Ryan314
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I'm currently doing the same with my EJ257 hybrid. I'm at about 240 miles. The first 50 miles I babied the crap out of it, but I have progressively been increasing the RPMs and have added a little boost every now and then to her. I still haven't gone past 4k RPM and 3-5psi of boost. Should I be?
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Old 05-15-2010, 02:01 PM   #15
Thug Nasty
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Sweet Jesus, this thread is a year old. I'm wayyyy past the break in now. I'm 10K deep. Nice bumps from the dead.
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Old 05-15-2010, 02:50 PM   #16
mick_the_ginge
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Quote:
Originally Posted by Thug Nasty View Post
Sweet Jesus, this thread is a year old. I'm wayyyy past the break in now. I'm 10K deep. Nice bumps from the dead.
LOL, I did not even notice that !!!! How did your break in go?
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