Dart Block
 

So does Dart make a sleeved block for the 4G63?

I've been trying to research about this for a couple of days now and havn't really found out anything useful.

My questions are:

Do they even make them?
If they do how much do they cost, and where can you buy them?


Thank's
-Stephan

Re: Dart Block
 

I have never heard of them. What do you need one for though? The stocker seems to be enough for most people.

Re: Dart Block
 

Most products need a market before they'll be released.

In this case, there isn't one. :)

Re: Dart Block
 

From what I know, you don't buy them, you have them built at a machine shop that has the ability to do the work. Haven't done much research into sleeved blocks, however the only street cars that I know of who have this done would be serious hustlin' Honda's.

Re: Dart Block
 

Well you would figure it would be out there due to the growing number of "fast" DSM'S.

I was interested in seeing if they had one, That sucks that they dont though.

I know our blocks have been proven to hold a great amount of horsepower espicially if you half fill them. I guess i was just curious.

-Stephan

Re: Dart Block
 

Dart makes sleeves for oem engines.

But they also cast their own blocks entirely as well.

http://www.tunerschoice.com/product....55&dept_id=187

Re: Dart Block
 

Exactly. Dart makes blocks for engines like the ford 302. When an engine is known to have a weak point of 550hp like the 302 the Dart engineers design a block that can surpass that because people are willing to pay for it.

Think of the high HP 4G63s that are out there. I am not sure how much power the most powerful is pushing but it is obviously know that there are many in the 600+ range with nothing more than aftermarket internals.

The 4G63 doesnt need its webbing and reinforcements redesigned, there is no demand for it.

Re: Dart Block
 

Everything and anything can be made better with more R&D. I just like the idea of the sleeved block. I know there has been MANY high HP 4G63 motors, there have also been many high HP honda's that have stock blocks. I'm not going to start a debate, Simple question, and now its answered.

Thanks
-Stephan

Re: Dart Block
 

Depends. Honda F22 blocks (accords and some ludes) are iron blocks but still crack sleeves w/ some big power. It's because of the open deck design though, not the material. The open deck blocks weren't designed for 400, 500, 600+ hp. The problems is that the actual sleeves get too much movment and distortion because of the little (no) support that they have on the sides. They're only attached at the bottom of the sleeve leaving the top open. The closed deck engines (4g63's) don't have this problem because the closed cooling jacket (sleeves attached to the block at the bottom AND the top of the sleeve) gives added support where it needs it.... At the top. This is why the higher HP 4g's don't have this problem, because of the added strength and the sleeves not moving and distorting. Now, it would be a different story if the stock 4g sleeves were cracking from shear pressure (an assload of boost), but that's not the case here. Just a little write up incase anyone that has read, or is reading this thread is confused at all.

Re: Dart Block
 

If Dart made a block for our cars, it wouldn't be for strength, because we already have that. I could see them making a custom block with increased spacing between bore centers and a little more deck height for running a much larger bore and stroke, therefore increasing displacement. It's the hot thing in the V8 crowd. A 454 cubic inch small block Chevy is only a few mouse clicks and a credit card away. I doubt if there'd be enough market in the DSM crowd to put in the R&D though. We're even cheaper than the Car Craft crowd. :rolleyes:

Re: Dart Block
 

Most good machine shops have the capibilities of sleeving a 4g63/4g64.
Do you need it? probably not.

/thread?

Re: Dart Block
 

Stock sleeved 4 cylinder Honda blocks have held 600+whp, low 400s is about as far as you want to go for safety though on a block you want to last a little while.

The #1 cylinder of 4G motors like to crack. It seems to happen most often with the 2.4l 6-bolt.

Re: Dart Block
 

Where would you go about getting a block sleeved around here? And how much does it usually run?

Thanks
-Stephan

Re: Dart Block
 

Go find yourself someone who will make a laser scan of the 6 bolt Mitsu block and provide you with a CAD model of it. I believe there is a company in Wisconsin who will do it. Then make the design revisions you are looking for, find yourself a big f'ing chunk of 355-T6 aluminum (same as what Dart uses), a 5 axis CNC, and you'll be on your way to having your block.

Re: Dart Block
 

I meant 4 cylinder Honda blocks above...

Re: Dart Block
 

DSM blocks?

Re: Dart Block
 

That could work for a drag only car, but you would need something cast for the street to be able to cool the cylinders.

Re: Dart Block
 

You have already been told, there is no point in sleeving your block. You have been listening to the Honda guys that have an open deck. The 4g63 is a closed deck and will easily handle 600 whp.

Re: Dart Block
 

My question that im asking about the dart block is simply out of curiostity, and i haven't been listining to any honda guys.

Can we close this thread now?

-Stephan

Re: Dart Block
 

Sure. These guys might be able to help you better than we can. http://www.honda-tech.com/

Re: Dart Block
 

Re-opened per request and cleaned up.

Re: Dart Block
 

How so? When a part is reverse engineered, everything is taken in account (coolant passages, etc.). Here is the name of the company I was talking about:
http://www.adcinc1.com/

A good friend of mine at Purdue sent in the heads off of his family's pulling tractor and had CAD models produced to which he has based his CNC porting off of. He also did some other goodies before finalizing the porting specifications but I won't mention that for the time being. :D

Re: Dart Block
 

Why? You'd still have to use sleeves since you obviously can't have aluminum cylinder walls. Water passages are water passages, material doesn't matter much. Unless you're talking about a solid block, which would be drag only. Or street/drag is your last name is Hess. ;)

Re: Dart Block
 

I was referring to the statement about a big ol' chunk of 355-T6 aluminum. That would be a solid block. You have to cast a street block to form the coolant passages. Solid block would be race only.

Re: Dart Block
 

Why couldn't the passages be machined?

Re: Dart Block
 

How would you machine inside the block so coolant could encapsulate the cylinders?

Re: Dart Block
 

CNC machining since you need sleeves no matter what in an aluminum block.

Re: Dart Block
 

Yeah, you could easily machine that out. Might have to put a few plugs in the block for the outside end of some passages, but it could be done. Definitely not worth the effort though.

Re: Dart Block
 

Okee, dokee.