FASST

I'm looking for something 380ci+ with a stock stroke length. With that in mind, is there any advantage besides the small ci increase in using a C5R block instead of a re-sleeved block? Since I'm not sitting on an unlimited amount of cash, if there is an advantage with the C5R, is it worth the added cost?

XtraCajunSS

iTrader: (2)

It's not worth the $6K if you are using the stock crank...

If you don't want to re-sleeve the block, you can go with the 6.0 iron block with a .060 overbore and get 375 cubic inches. If you wanted to add some more, get your crank offset ground for a little added stroke.

Shane

FASST

Shane, ignore my lack of knowledge, but why would using a stock crank matter? I thought that they were pretty strong....it was the pistons/rods that were the weak link in the equation.

I thought about the 6.0 liter block, but I want to try and stay with an Aluminum block--the added weight from the iron block will throw off the suspension, plus I'm trying to keep weight down.

XtraCajunSS

iTrader: (2)

Well, unless you were going to significantly increase the stroke, you aren't really getting that many more cubic inches for your $6K. With a stock crank and stroke, you would get 387 cu in from a 4.125 C5R block. If you have the cash for a C5R block, you might as well pony up for the 4" to 4.125" stroker crank and really build some cubes(427-442.) Just my opinion though. Don't get me wrong but when you start talking C5R blocks usually $'s are not a factor... <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Also, if you look at the relative cost of C5R vs iron block with stroker assembly, you get 400+ cu inches with a bulletproof bottom end. Spend the rest on weight reduction (tubular K etc.) and you will be happy. With the mods I've done, my car is actully lighter now than it was with the stock block.

Shane

<small>[ August 27, 2002, 04:39 PM: Message edited by: XtraCajunSS ]</small>

FASST

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by XtraCajunSS:
With the mods I've done, my car is actully lighter now than it was with the stock block.

Shane[/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No ****!?! Well maybe I'll look into the iron block afterall. I'm looking to put twin turbos on it down the road anyway--more weight to the front end <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> but it sounds like there are definitely things that can be removed to alleviate the problem. I also want to keep the bore to stroke ratio farely high. Twin turbos usually give great low end torque, but run out of room up top. Using a large stroke engine will just amplify this effect. How much can you over-bore the 6.0 liter block?

BTW, thanks for you help.

Derek 357i

iTrader: (1)

Shane[/QB][/QUOTE] Twin turbos usually give great low end torque, but run out of room up top. Using a large stroke engine will just amplify this effect. QB][/QUOTE]

Your statement on TT's is not necessarily true. It has everything to do with what size turbos you install. If you install small turbos, your statement holds true. If you install larger turbos, the exact opposite is true.

XtraCajunSS

iTrader: (2)

Derek, that wasn't my comment and I do agree with you...

Byron, you can normally safely overbore the blocks to 4.060". If you are doing FI then I would go with a max of .030"...

Thanks,
Shane