Alright, i'm going to be putting a turbo on my B18c1 block. I was just wondering at what PSI is sleeving required. It is going to be run off a Zdyne for management if that makes any significant differences.

 

5 psi from a diesel truck turbo.

 

I don't think you will find a real answer. I know some people that have boosted at 6 psi and blew a block. I know other people that boost over 20 psi on stock sleeves and don't have any issues. From what I have seen here on h-t it really depends on your tune. If you have a really good tune you can boost a lot more.

After cracking my sleeves on my first block at 14 psi with a block guard I will not boost over 10 psi. Everyone tells me to turn up the boost but I would rather have my motor last instead of cracking another sleeve.

I guess it depends how lucky and how big of ***** you have. You may be able to run 20+ and never have a problem or may blow it up with just a few psi.

Hope that helps.

 

You will never find a definate answer in PSI. PSI is not an accurate way of determining how much a part or engine will hold. 12psi on a T25 is absolutely nothing like 12 psi on an SC61. You will find a more accurate answer in horsepower, but even then tuning plays the key role.

 

alright so if i was looking for 280ish at the wheels on a good tune should i sleeve?

 

It is VERY dependent on the setup, tuning, and motor condition. If it is a fresh motor, tuned well on a streetable setup, adding let's say 100-150 hp shouldn't be an issue on stock sleeves with a stock bore. If you are not tuned worth a ****, you can blow it on very low boost. Case and Point: Brandon Gray (not sure about his name on here) cracked the #3 cylinder on 5 psi on a mid-mileage GSR. It blew on the dyno at 213 hp. I have always thought of sleeving as a way to run high boost on big-bore motors. If you are just wanting low to mid boost (5-10 psi) on a stock bore, you should be fine with a good tune. Did I forget anything? Feel free to add on guys!

 

Ok i guess i left out quite a few details. The engine is currently out of the car in pieces. I'm going to be droping the compression a little bit (guessing about 9.5:1 or so) and a complete rebuild from oil pan to valve cover. This is still going to be a DAILY DRIVER!! No bandaids for tuning at all. I'm not a crazy driver that takes it up to red everytime i drive so i'm sure that also factors in as well.

So with this set up the big question is do i need to drop a $1000 on sleeving to run reliably?

 

I have BI8C, 10 psi daily, I make 281 to the wheels, stock sleeves for over 8 months now no problems.

Unless your going to run major psi of boost, don't sleeve. Just make sure your tune is good, you have good engine management (Like HONDATA like I have).

I too am concerned about lonevity of the motor so I won't raise the boost anymore. 300 HP on stock Pistons/Rods in a B18C is about as far as you want to go.


You'll be fine.

 

So with this set up the big question is do i need to drop a $1000 on sleeving to run reliably?[/QUOTE]

You dont have to spend $1000.00 to sleeve a mild built block. You can use our standard flanged sleeves that are about $635.00 installed. Its sometimes better to build the block up right the first time than to have a problem that could have been fixed ahead of time.

The amount of boost a Honda block will very like everyone else said above. Honda casting a very inconsistant, thats why you see some handle a lot of boost and some dont. Also how many miles the block has makes a difference. Even if you run low boost, over time the block will get weaker and if you decide to boost a little higher you may have problems. Honda blocks were not designed to be a turbo block.