Rebuild engine question?

[V8KILLR]

Why just rebuild a 3.8 to a 3.8 plus the 30 over to resurface the cylinder wall? Isn’t it worth it stroking or boring the engine to a greater displacement? What are my chooses for displacement upgrades? Is it the on center stage II block that uses stock style setup? That block can go out to a 4.1L? Should I think about that block? Is the stock style stage II block going to be any more money to rebuild? Are there any hidden $$$ difference?

Thanks,
Jason

 

[Nick Micale]

Just to stroke a stock block, parts and labor would run $4-5000. Could be higher depending of the crank?

 

[V8KILLR]

Thanks guys for the post and info.

Jason

 

[V8KILLR]

I just had some more questions please, why is a off-center S2 block still a good amount of $$$ over the 109 block? If all the parts from the 109 block can bolt on to the off-center S2 block, what makes the S2 off-center more $$$ to build?

Thanks much!!!

Jason

 

[V8KILLR]

TTT

 

[49-blues]

Its a heavier duty stronger block.

 

[V8KILLR]

If the 109 is an off-center block and one of the types of a S2 comes as an off-center block, what is the difference in price to use a S2 off-center over a 109 block in a rebuild? Sure a S2 block is going to cost more to buy the block then a 109 will, but is there any difference other then that to rebuild a S2 block and put the 109 parts on it? Are there any parts that do not bolt on to the off-center S2 block from the 109 block? Because as it is my understanding, the 109 block parts will bolt onto the off-center S2 block. Can’t see there being more money to rebuild a S2 off-center if this is the case. The machining an off-center block is going to be the same as a 109 block, or are there more processes to perform in the S2 off-center?

Thanks,
Jason

 

[Grandnat]

Its not whether you could or couldn't,
I think the concern most people have is why would you risk putting stock parts in a stage block.


The stock parts will fail WAYYYY before the stage block will....and broken parts, even broken stock parts could grenade a rare and expensive stage block.


so in the end there is no difference. Why put your stock stuff in a a stage block? The displacement will be the same and the power level will only be slightly higher since the crank will most likely go at around the same time it would in a stock block.



a stroker crank is ~$2200
Good RODS ~$1000
Pistons ~$700
Then you need heads to take advantage of the bigger displacement Ported STage II or GN1s or TA heads ($1000-$3000)
Then of course you need a roller cam to take advantage of the new heads. ~$1500
Now you need a turbo to make all this big stuff breathe $1000
etc
etc
etc

you get the picture. adds up to around $15000 when your all said and done.


or you can just put all the good stuff in a stock block.....

it will cost only a few thousand cheaper......but is 100X more likely to grenade and destroy all those pretty and expensive parts.



bottom line.. if you REALLY NEED more displacement cheap(er), buy a production 4.1 block girdle it and put in some good pistons.

If you want the big power a stage block will provide....be prepared to do it once...the "right" way (a.k.a. the expensive way) or risk loosing it all in short order.

 

[V8KILLR]

Thanks for the help. I was thinking all the way that the block was the limitation. Not just the crank and other parts. What truly gives way first? Why is 750 Hp the limit of a stock block? Does every thing go at once? Is that why you may as well go S2 in all regards? I guess the bottom line is that for about 700 / 750 Hp, I can rebuild the 109 block. But if I want more, there is no way around it that I will need to go S2 in every part.

Thanks again,
Jason

 

[V8KILLR]

ttt