dohc block posting, easy?
10-14-2008, 11:12 AM
#11
0.0 BAR
Join Date: Feb 2003
Posts: 0
Re: dohc block posting, easy?
Posting will cause failures where the stock sleeve is reliable.
Widdy's idea is that the posts would stabilize and support the sleeve. He had some strain gauges on a Honda engine once upon a when and "saw" that they "moved" and decided that this was a solution. Problem is, the sleeves don't move, and he's too arrogant to ever admit he was wrong.
The stock Honda sleeve is very thin, but VERY strong. What Widdy's strain gauges picked up wasn't the sleeves shifting, he picked up them swelling on the compression stroke. They are designed to do that, it doesn't hurt anything.
However, when a sleeve swells up against a metal pin stuck in it's side... if it swells enough the sleeve goes POP right where the pin goes.
Anyway. The D16 sleeves are the same thickness as B-series, but are a smaller diameter... this means they are stronger. If a B-series sleeve bored 0.5mm (quit with that 0.020" over ----, this is not a small block) can handle 450 whp reliably and 650 for drag-only duty then how much is a D-series good for, kind sir?
Widdy's idea is that the posts would stabilize and support the sleeve. He had some strain gauges on a Honda engine once upon a when and "saw" that they "moved" and decided that this was a solution. Problem is, the sleeves don't move, and he's too arrogant to ever admit he was wrong.
The stock Honda sleeve is very thin, but VERY strong. What Widdy's strain gauges picked up wasn't the sleeves shifting, he picked up them swelling on the compression stroke. They are designed to do that, it doesn't hurt anything.
However, when a sleeve swells up against a metal pin stuck in it's side... if it swells enough the sleeve goes POP right where the pin goes.
Anyway. The D16 sleeves are the same thickness as B-series, but are a smaller diameter... this means they are stronger. If a B-series sleeve bored 0.5mm (quit with that 0.020" over ----, this is not a small block) can handle 450 whp reliably and 650 for drag-only duty then how much is a D-series good for, kind sir?
10-14-2008, 05:45 PM
#14
0.5 BAR
Thread Starter
Join Date: Jun 2008
Posts: 150
Re: dohc block posting, easy?
haha thanks guys for all the help, ill be just putting in the pistons and going with a sick tune.
im not going to put in a block guard, cause from what i hear they blow real bad.
but you think 300whp is safe on those stock sleevs? i want this motor to last!
im not going to put in a block guard, cause from what i hear they blow real bad.
but you think 300whp is safe on those stock sleevs? i want this motor to last!
10-15-2008, 03:47 AM
#19
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: dohc block posting, easy?
Originally Posted by 88dx
If your going to POST the block make sure the POST goes all the way threw the block that way it supports the piston too 
With a good drywall screw
In all seriousness people are making more power than I ever thought was possible on stock sleeved motors. Guys like chris harris are a result. Im pretty confident in my skills but am outdated on ecu tuning and it seems ectune is the future and what everyone is making big reliable power with
10-15-2008, 09:56 PM
#20
0.0 BAR
Join Date: Jun 2003
Posts: 0
Re: dohc block posting, easy?
Originally Posted by yamaha6611
haha thanks guys for all the help, ill be just putting in the pistons and going with a sick tune.
im not going to put in a block guard, cause from what i hear they blow real bad.
but you think 300whp is safe on those stock sleevs? i want this motor to last!
im not going to put in a block guard, cause from what i hear they blow real bad.
but you think 300whp is safe on those stock sleevs? i want this motor to last!
