My RB Project, going all in!
FYI a soft break-in is extremely harmful to the engine... see link below for more info but point is for the first 20 miles the engine needs to be beaten on IE: run the high boost you plan on running and do a series of pulls and letting off throttle to let engine slow itself down (vaccuum created by this will expand the rings to help seal correctly)
Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power
I've followed this procedure for the last 3 race engines i built and 2 that i built for a buddies evo and 1 for a supra so same concepts will hold for an RB.
Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power
I've followed this procedure for the last 3 race engines i built and 2 that i built for a buddies evo and 1 for a supra so same concepts will hold for an RB.
I wouldn't say "extremely" harmful. Yes, the argument is sound, and I've followed that break in procedure with adequate results, but the possible destructive power of over-revving an engine that has just been built like a Frankenmotor, and along with turbos with itty bitty oil passages that can get blocked up with grit, AND a tune that isn't even ready (probably the most concerning part)... I think it makes more sense to take it easy than worry about removing some hone marks and seating rings.
I wouldn't say "extremely" harmful. Yes, the argument is sound, and I've followed that break in procedure with adequate results, but the possible destructive power of over-revving an engine that has just been built like a Frankenmotor, and along with turbos with itty bitty oil passages that can get blocked up with grit, AND a tune that isn't even ready (probably the most concerning part)... I think it makes more sense to take it easy than worry about removing some hone marks and seating rings.
The way i do it is start the new engine idle for 20-25 min until it reached standard operating temperature then shut it off and go back the next day and drain the oil and retorque the head. Then i follow that with my first 20 miles of WOT pulls then i drain and refill the oil...after that point the motor has been broken in and rings should have seated.
The reason why i said extremely harmful because if the tune is too rich the cylinder walls will be washed out with fuel and the rings wont properly wear to the hashing on the cylinder walls and even worse not properly breaking in during the first 20 miles will result in improper ring wear and will result in lower than desired compression and excessive blow by etc....
This is if the OP plans on making big power (500WHP + )

Thanks bro!
Temporary indeed!
FYI a soft break-in is extremely harmful to the engine... see link below for more info but point is for the first 20 miles the engine needs to be beaten on IE: run the high boost you plan on running and do a series of pulls and letting off throttle to let engine slow itself down (vaccuum created by this will expand the rings to help seal correctly)
Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power
I've followed this procedure for the last 3 race engines i built and 2 that i built for a buddies evo and 1 for a supra so same concepts will hold for an RB.
Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power
I've followed this procedure for the last 3 race engines i built and 2 that i built for a buddies evo and 1 for a supra so same concepts will hold for an RB.
The VQ sounded more "refined" I have to admit, the RB is just plain raw & badass which I also love. The pedals and steering are stiffer which also adds to my driving pleasure.
I wouldn't say "extremely" harmful. Yes, the argument is sound, and I've followed that break in procedure with adequate results, but the possible destructive power of over-revving an engine that has just been built like a Frankenmotor, and along with turbos with itty bitty oil passages that can get blocked up with grit, AND a tune that isn't even ready (probably the most concerning part)... I think it makes more sense to take it easy than worry about removing some hone marks and seating rings.
Yea obviously the tune needs to be in place BEFORE going WOT for the first 20 miles.
The way i do it is start the new engine idle for 20-25 min until it reached standard operating temperature then shut it off and go back the next day and drain the oil and retorque the head. Then i follow that with my first 20 miles of WOT pulls then i drain and refill the oil...after that point the motor has been broken in and rings should have seated.
The reason why i said extremely harmful because if the tune is too rich the cylinder walls will be washed out with fuel and the rings wont properly wear to the hashing on the cylinder walls and even worse not properly breaking in during the first 20 miles will result in improper ring wear and will result in lower than desired compression and excessive blow by etc....
This is if the OP plans on making big power (500WHP + )
The way i do it is start the new engine idle for 20-25 min until it reached standard operating temperature then shut it off and go back the next day and drain the oil and retorque the head. Then i follow that with my first 20 miles of WOT pulls then i drain and refill the oil...after that point the motor has been broken in and rings should have seated.
The reason why i said extremely harmful because if the tune is too rich the cylinder walls will be washed out with fuel and the rings wont properly wear to the hashing on the cylinder walls and even worse not properly breaking in during the first 20 miles will result in improper ring wear and will result in lower than desired compression and excessive blow by etc....
This is if the OP plans on making big power (500WHP + )
Some random updates from today:
So we found out the whining sound was coming from the throttle body flange and not the alternator bushing. Easy fix.
There's still a slight ticking sound in the valvetrain, all the clearances/washers will be measured again tomorrow to make sure they're spot on.
A hydraulic e-brake is also going in there, will be interesting to see where my mechanic will tap into the brake lines since the rears never join.
The swaybar luckily hasn't rubbed over the past two days and she's been in nice dips. I will get it spaced downwards by 10mm anyways just for a peace of mind.
Engine oil will then be drained and inspected, then some fancy oil will go in along with new spark plugs and a battery and then we're off to the DYNO!!
So we found out the whining sound was coming from the throttle body flange and not the alternator bushing. Easy fix.
There's still a slight ticking sound in the valvetrain, all the clearances/washers will be measured again tomorrow to make sure they're spot on.
A hydraulic e-brake is also going in there, will be interesting to see where my mechanic will tap into the brake lines since the rears never join.
The swaybar luckily hasn't rubbed over the past two days and she's been in nice dips. I will get it spaced downwards by 10mm anyways just for a peace of mind.
Engine oil will then be drained and inspected, then some fancy oil will go in along with new spark plugs and a battery and then we're off to the DYNO!!
Thats what my mechanic guessed initially, something about clearance being slightly higher than it should be.
And why the hydraulic E-brake?
1) Because racecar

2) Because it's a lot cheaper than getting an MT center console & handbrake and shipping them across the planet from the US. G's here aren't sold in MT's so the dealer and scrapyard don't have these parts.
I forgot you switched to MT lol.
Hmm thats odd...doesnt sound like valve tap right ? do you know if the head was ever milled ? its possible that its out of spec but i doubt that if you say its stock..
Most likely its something simple.
Most likely its something simple.
I spoke to my mechanic today and he said the clearance on a few valve was slightly over spec but nothing alarming, he is taking care of it. E-brake mounts have been made on the passenger side. Oil inspection came clean, a little thick due to old oil residuals in the engine but thankfully everything is looking great so far.
@lilwiz, I'm using the 5MT RB25 pull type transmission, there are pics in my first post
@lilwiz, I'm using the 5MT RB25 pull type transmission, there are pics in my first post




