I have a question. Which is better for boost(turbo charger), boreing out the motor a little or sleeving the motor? I see alot of people sleeving a motor for higher boost. Why is that. Is it better or more reliable? I plan on boosting my motor(B18B1) with 15+ pounds of boost. Can some one help me understand the pros and cons of both options. Thank you for any help.
bore or sleeve?
- Thread starter dracing
- Start date
a slight bore only lets you put in a new set of pistons. it cleans up the walls for better clearance for the new pistons that you put in. Sleeving totally changes the structure of the cylinder walls. Lets sat When we sleve a B16A block, we start off with a sleeve that is about 80.5mm bore size and we can bore and hone it back to a stock 81mm bore and up to 87mm bore. most turbo setups are kept at 81mm, 81.5mm up to 84mm. All motor bores are about 84mm for street and 85-87 for more hardcore setups.
Sleeving for higher boost is recommended since the sleeves are thicker and can withstand the pressures that the motor goes through at high boost.
Here's an example of a B16 that is sleeved and we put in 81.5mm bore pistons in it.
Sleeved motors like this are what we put in street and even race cars that boost from 15psi-35psi. If you are planning to boost your B18B, its recommended to sleeve the motor. a basic rebuild of pistons and rods without sleeving is good but is only adviesable to about 15psi. you will still have the weak point at the sleeves if you just bore and hone for new pistons. the Sleeved block is a bit more, but does give you that insurance of being able to boost alot more on that motor.
check out the difference in prices between a sleeved block and just a basic Built block on our site. it will be a stage 3 vs a stage 4 block. it shows that sleeving adds another $600-700 to the build up.
Sleeving for higher boost is recommended since the sleeves are thicker and can withstand the pressures that the motor goes through at high boost.
Here's an example of a B16 that is sleeved and we put in 81.5mm bore pistons in it.
Sleeved motors like this are what we put in street and even race cars that boost from 15psi-35psi. If you are planning to boost your B18B, its recommended to sleeve the motor. a basic rebuild of pistons and rods without sleeving is good but is only adviesable to about 15psi. you will still have the weak point at the sleeves if you just bore and hone for new pistons. the Sleeved block is a bit more, but does give you that insurance of being able to boost alot more on that motor.
check out the difference in prices between a sleeved block and just a basic Built block on our site. it will be a stage 3 vs a stage 4 block. it shows that sleeving adds another $600-700 to the build up.
^ Well, that about covers it and a lot more in detail than I was going to.
Boring removes metal, effectively weakening it. Plus relatively few shops are going to be able to produce a factory quality finish on the bore. (There are shops that can, but they have invested in the machinery to do so and charge as such)
BTW: Above picture...absolutely beautiful!
Boring removes metal, effectively weakening it. Plus relatively few shops are going to be able to produce a factory quality finish on the bore. (There are shops that can, but they have invested in the machinery to do so and charge as such)
BTW: Above picture...absolutely beautiful!
Good job exospeed. Saved alot of people some trouble.
no problem. even though im not on the forum as much, always glad to help in the technical questions I can help answer extensively.
Wil
Wil
here's another picture. a stock sleeved B18A. this one most likely has a .20 over pistons.
well...i learned something today 
D16 block bore w/ 11:1 pistons ready for turbo setup, coming soon....u know the drill, follow the link
hehe u wanna see a high compression D block.
^ that should take care of any cylinder distortion problems
That looks great. Surface finishes look exceptional! Not like some one with a cylinder hone and a 9.6v Makita drill did it.
I never really thought about it but it looks like the D-series has a 180 degree crank. hmmmm.
That looks great. Surface finishes look exceptional! Not like some one with a cylinder hone and a 9.6v Makita drill did it.
I never really thought about it but it looks like the D-series has a 180 degree crank. hmmmm.
Please can u advise me as to what make and type of pistons u are using as im currently rebuilding a d16 and it will be on its first rebore as i took it to a certain place to have it piggy backed and dyno and the twats ran 1.8 bar through it and shot my rings after i told them stock comp and 8psi please as the turbo was only on it for a week was running fine at 4psi but not reving full out hence the piggy backgreenlx777 said:D16 block bore w/ 11:1 pistons ready for turbo setup, coming soon....u know the drill, follow the link
. so i will be very very peased if u can help
ps. its a d16 91/92 and was running 9.1:9 comp? what pistons ?from where?how much ?and what comp is best
THANKS
