Re: 91 Galant VR4
 

Was this a 63 block? What kind of overbore?

Re: 91 Galant VR4
 

+1, too much boring mebbe?

The pic is incredible, I can't believe the whole thing didn't let go. At last you can re-use 90% of the parts!

Re: 91 Galant VR4
 

Mo had a cracked block but his was the 2.4 6bolt block.

John, you don't deserve this kind of bad news. Best of luck on finding a new block and hope to see it out there again in the spring. :D

Re: 91 Galant VR4
 

This issue isn't uncommon with high hp 4g63s. Even ones with 0 overbore.

Re: 91 Galant VR4
 

This is a 4g63 block with un known miles, about 300 miles at ths power, most of which was just driving around. The block was a 40 over bore, they weisco 9.25:1 pistons were shelf stock with the 40 over.

I have another used block, I will bring it to work and sonic test everything I can. The sleeve idea is out, just a partial fill with hard block. If its only the block and everything else is ok it will be running in spring.

From what I recall it was the #1 cylinder that cracks, and some say its from cut driver side motor mounts. Thus why I made my motor mount bolt on to the front of the block also.

~John

Re: 91 Galant VR4
 

Hmm, I've heard of several 2.4's with this, hardly any 2.0's. Sucks to hear, but luckily blocks are still pretty plentiful.

Re: 91 Galant VR4
 

http://www.mitsustyle.com/forums/showthread.php?t=28089

Check out some of the parts I have for sale.

~John

Re: 91 Galant VR4
 

ouch, just curious what are you running for a balancer?

Re: 91 Galant VR4
 

stock balancer

Re: 91 Galant VR4
 

That sucks john. I will put that 2 step tweaks on the back burner.

Re: 91 Galant VR4
 

Does this mean you are calling it quits or what is the plan?

Re: 91 Galant VR4
 

Goin Auto?

Re: 91 Galant VR4
 

I also thought he was selling all that random stuff to help fund his motor build.


Good luck on everything John! This car is beast and it was fun to see it in action on the dyno and at the track. Hope all goes smooth with the future plans for it and you can get your 9 second pass in!

Re: 91 Galant VR4
 

lol, there is NO WAY I could call it quits, even if I wanted to. I have a ton of money and time into a car that runs a 10.06 only makes 650awhp.

I was asked how I have kept going this hole time at the dyno day. All I said was "I took a really long break".

I looked at what I have invested, what I can easily replace in the setup, and what I can possibly up grade over this winter.

So I posted stuff that was a little light on the build, and stuff that I can just buy again come EARLY spring and get the car back up and running.

I will say this, I have a plan for bigger/better on everything I posted up for sale. This car will be running on E98 even if its at the same boost as now or not, I will have some form of the 2200cc injectors, a fuel pump that can handle a 1000+ awhp, it will have the same or better manual tranny, it will have the same or better tires, and the race seat is an up in the air thing right now.

I am also going over the idea of the 25.5 chassis and really coming in hard next season. As in expect another 200lbs off the car, a chassis legal for a 7.50@180 and another 300awhp on tap plus nitrous.

But for now the goal is only to take the galant VR4 record, I have the trap speed wrapped up on pump gas, with a few more passes with a good track I know I can get the ET, but if I can shatter, and by shatter I mean a good second or better, then I might have to take it.

~John

Re: 91 Galant VR4
 

I like it when people have ambitious goals. Get it done.

Re: 91 Galant VR4
 

This strengthens the motor but makes it harder to cool? I'm guessing that drag motors can get away with it since they aren't running as long.

Re: 91 Galant VR4
 

I know V-8 guys do partial fills all the time, and a lot of them road race there cars. For the most part the oil does more cooling for the short block, and you still have water flow in the head, and the top part of the bore where the majority of the heat is created. They also add something to the hard block that helps it dissipate heat. I will install an oil cooler to help keep the oil temp under control.

~John

Re: 91 Galant VR4
 

There's more than a few hardblocked DSM's running around on the street.

Re: 91 Galant VR4
 

http://www.mitsustyle.com/photopost/...otos_32173.jpg
http://www.mitsustyle.com/photopost/...otos_32175.jpg
http://www.mitsustyle.com/photopost/...otos_32189.jpg

Here is the damage. It looks to me like some casting lines on the water jacket side of the #2 cylinder wall caused the crack. The cylinder wall measures about .175-.195". So with the 5" of un supported cylinder wall they were moving all over and the casting line made the cylinder wall a little thinner and had stress risers, thus the crack.

It looks like the #3 and #4 were doing the same thing. The pistons have cracks where the piston skirt blend into the wrist pin boss. The Rod bearings have seen better days, but they were standard Kings, I will be running ACL race series with a special coating with the new motor. The main bearings look great, and the oil pump/front cover is junk after 300miles.

It looks like I am getting air in the oil, so I will be doing some oil control around the crank and oil pan, and I will port the oil pressure releaf hole a little more.

Now I have the parts needed to put the hard block in, then I need to make a parts list then start machining.

~John

Re: 91 Galant VR4
 

Awesome carnage.

With the oil pump/front cover being trashed after 300 miles, is there a harmonic balance issue similar to what we were running into with the 6g72? Was something out of balance? (clutch? balancer?)
If memory serves correct you were revving to just shy of 10,000 rpm?
The air in the oil would make sense with that high of rpm and the oil pan design. More baffles and perhaps knife edging the crank will help keep the oil down and not being thrown around. Have you thought about trying to run a deeper oil pan and modifying the pickup? Get the oil away from that flailing crank may help with windage issues.

Do you have any pictures of the rod bearings? I am wondering if they were wiped out from oil contamination/air in the oil or if it was an rpm/moving part issue. However, like you mentioned, the Kings are a great standard duty (but “soft” bearing), the tri-coated ACL race series (the black ones) are a much better option for the severity you are putting that 4g63 through.

Are you planning to do a partial hard block now?

"Stay in it"

:)