Engine Rebuild...can i floor it now?
#1
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Engine Rebuild...can i floor it now?
My engine was rebuilt about 620miles ago. It hasent been taken onver 5K so far tho it has been boosted to about 5psi. My question is when can i start to take it out to the redline and when can i run full boost?
Thankx
Thankx
#2
call me Smokie Smokerson
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Here's a good discussion on that topic. Everyone's gonna give you a different answer:
https://www.rx7club.com/forum/showth...ebuild+breakin
https://www.rx7club.com/forum/showth...ebuild+breakin
#6
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Skip at KD Rotary recommended the following for my rebuilt engine:
-Under 4k for the first 500 miles, then change the oil
-Under 4k for the next 500 miles. Change oil again
-Under 4k for the next 1000 miles, touching maybe 3psi of boost, but only once every couple days. Change oil at the 2000 mile mark, and you can beat the hell out of it.
I did it. I figured it couldn't hurt, and I really didn't wanna go through the rebuild process anytime soon again.
-Under 4k for the first 500 miles, then change the oil
-Under 4k for the next 500 miles. Change oil again
-Under 4k for the next 1000 miles, touching maybe 3psi of boost, but only once every couple days. Change oil at the 2000 mile mark, and you can beat the hell out of it.
I did it. I figured it couldn't hurt, and I really didn't wanna go through the rebuild process anytime soon again.
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That seems excessive since Mazda's recommendation for brand new motors was 500 miles under 4000 rpm. Rebuilt motors with used parts should theoretically require less break-in time.
I think 500 miles of 5 psi boosting below 4k rpm is just fine. I would spend the next 500 miles working my way up to redline and full secondary boost.
But what do I know, I'm still on my original engine....
I think 500 miles of 5 psi boosting below 4k rpm is just fine. I would spend the next 500 miles working my way up to redline and full secondary boost.
But what do I know, I'm still on my original engine....
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#9
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I am just in the process of running in my new engine.
I have been told the following:
First 500 miles below 3500rpm with zero boost
Oil Change - doing this tonight!!!
Next 500 miles slowly building the rpm up the the redline, with little or no boost
Not advised, but I will do another oil change at this point
Then slowly building up the bost over the next 1000 miles
This he said has proven to give strong engines in the past.
Dan
I have been told the following:
First 500 miles below 3500rpm with zero boost
Oil Change - doing this tonight!!!
Next 500 miles slowly building the rpm up the the redline, with little or no boost
Not advised, but I will do another oil change at this point
Then slowly building up the bost over the next 1000 miles
This he said has proven to give strong engines in the past.
Dan
#11
Dorifto Tengoku No More
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Originally posted by FDreaming
just curious how are you taking it to such high RPMs without hitting any notable boost levels? Boost controler?
just curious how are you taking it to such high RPMs without hitting any notable boost levels? Boost controler?
#14
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That's just what I was told. When an engine is rebuilt all of the sealing chemicals, and temporary lubricants have to be burned away.
How many miles are you at Mahjik?
How many miles are you at Mahjik?
#15
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Originally posted by DaedelGT
That's just what I was told. When an engine is rebuilt all of the sealing chemicals, and temporary lubricants have to be burned away.
How many miles are you at Mahjik?
That's just what I was told. When an engine is rebuilt all of the sealing chemicals, and temporary lubricants have to be burned away.
How many miles are you at Mahjik?
#16
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I did 1000 miles (mostly city) under 4000 rpm and no boost on my Malloy reman. Changed the oil at 500 and 1000 miles. With the fresh oil I promptly went out and lit that sucker up Strong as ever now with about 20K on the motor.
#17
Mr. Links
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Originally posted by DaedelGT
That's just what I was told. When an engine is rebuilt all of the sealing chemicals, and temporary lubricants have to be burned away.
How many miles are you at Mahjik?
That's just what I was told. When an engine is rebuilt all of the sealing chemicals, and temporary lubricants have to be burned away.
How many miles are you at Mahjik?
As mentioned, the lube that is used burns away, just as in a new motor.
As far as miles for me? I need to check, but I think I'm around 24k on my reman (which that's spread over about 5 years).
#18
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Originally posted by paw140
Huh?? Sure, the assembly lube will burn away, in like the first 10 to 15 minutes.
Huh?? Sure, the assembly lube will burn away, in like the first 10 to 15 minutes.
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