Block

 

main caps

 

what are you doing to it?

 

Pretty much everything. The block has been polished, squared and blue printed thus far. It was amazing to see just how bad the dimensions are in these things to start with. It takes a lot of time to get everythiing squared up in the block so that it can be considered a decent platform to start putting some real power on top of it. For stock use , its fine, but for serious upgrading and severe use, it will not last very long.

 

is the block strong enough with 2 bolt mains only??

 

The girdle provides extra strength for the block.

 

Is the block strong enough for what? There is not enough room for a four bolt main cap in the block. We are working on alternative options to shore up the bottom end of these cars. True, the girdle helps, but the assembly is made from cast iron and is not very rigid, thats why they tied them all together. Like I said we are working on other avenues to adress beefing up the main cap area of this motor.

 

While the 4G63 block is not up to airplane tolerances and may be subject to improvement - it seems to me that the block is a fairly bullet proof set up up to 600 whp

Pruven has told me of many, many 4g63 cars doing 20 - 30 k miles with no problem in the 450 - 550 whp range

I have been hagning aroung at Pruven for some time and never saw a bottom end failure - although there have been many piston, ring and head gasket failures and one eagle rod which broke in half

While I do not disagree with any of your obsertaions - I question the need for any changes and the economic viability of such undertakings on a $30,000 car

I imagine if you took the car to a master body man he would find similar issues with the squareness of the panels and the quality of the paint - but to me it makes little sense to put a $20,000 show car paint job on a $30,000 car

 

You are absolutely correct. I totally agree with you.

 

Are those the stock internals?

 

No, but the block was, and there wasn't much left of it to photograph.

 

The "good enough mentality" might be fine for some .. not for me .. as far as polishing the inside surface of the block, yes it does help drain back, also helps on the strength end also . this is not some lets see how it goes project .. we sat down with a budget, gameplan & thats what we are following ! ! guy's thanks for the support ! ! !

 

The strength of a casting can be increased in upwards of 40% by polishing it.

The key statement was "Go ahead and do it if you want, but the money would be better spent in other places".

Like where? An education? How many successful motors have you built?

Sarcasm is the humor of fools.

 

A couple. Yourself? There is one in my car right now.

http://www.geocities.com/shaperebuild/

In fact, I came up with a pretty foolproof way of aligning the thrust bearing in a 6-bolt 4G63T when I built that engine. Lots of people still use that method.

On that engine, I drilled and tapped it in 7 places to fit a 7-bolt oil pump and 7-bolt oil pan on it. I also had to port the oil pump a bit in a few spots, as well as weld aluminum to fill up a hole that was in a particularly bad spot.

I have yet to hear of a 4G63T block cracking. Have you?

I mainly had issue with this statement you made: "For stock use , its fine, but for serious upgrading and severe use, it will not last very long."

Sorry, that is a bunch of baloney.

 

Waz up man! I also believe in perfection. because all of this increases reliability and reliability=horsepower (period). We all know that w/o reliability you have no horsepower.
But my question: How much did the polishing, squaring and blueprinting cost? and how much time did it take to do? Basically how much would it cost to do all of that and make the motor rev to 9,000rpms.
And also: Does anyone know if someone makes titanium connecting rods? and how much? I think Crower is the only company right?