David, even the 99-01 Cobra blocks I have seen didn't look like the Explorer blocks. What you got is for sure not an Explorer block, but I do agree, yes it will be fine.Blown46Cobra said:Nate - I looked at your block out at MD on Friday. Your's does have the external webbing and only one freeze plug. I remember you commenting that it was an Explorer block.
Kristopher - when you say car block, I assume you mean 96-98 block rather than 99+ Cobra/Explorer block.
I bought this block from Kar Kraft and it was advertised as being a 2002 Explorer block. My concern is that I am sending it off to Modular Performance to get their big-bore treatment and thought the extra rigidity of the 99+ block would be a plus. Mike at Modular Performance says that for a NA application, the 96-98 style block will be fine.
More than anything, I want to know so that I can tell how reputable Kar Kraft is.
Kristopher - Thanks for the reply. This will be the first and only order I'll ever place with Kar Kraft. There service was pretty poor and misrepresentation of parts isn't something that I have a lot of patience with. Fortunately, the block won't be used for a forced-induction application.kdanner said:David, even the 99-01 Cobra blocks I have seen didn't look like the Explorer blocks. What you got is for sure not an Explorer block, but I do agree, yes it will be fine.
As far as Kar Kraft goes, I've actually been to their "facility", and my garage at home is bigger. I'll leave it at that.
Before Chrismas and I'll be shipping it to Mike.99Roush said:When did you order this block? Are you having it shipped to you or to Mike?
I've got the same engineering number as you on my block: RFXE-6015-22770099. There's a designation of NNLILF1 and a date code of Aug318 stamped into the block. The cast-in date (circle with year in the middle) reads "98". I have blue paint sprayed in two corners of the block. One interesting thing about the block is that it is new - as in never been installed and has never had anything attached to it.ShelbyGuy said:lets provide some casting numbers, eh?
i have two of these blocks, which i will refer to as 'corporate aluminum v8 blocks' since thats what i believe them to be. Anyway, perhaps someone can cross-reference the engineering number to the part number and description:
this looks like an experimental part number to me, but im not fluent in the new numbering yet.
I also have a 2001 cobra crate engine still strapped to its pallet - its block is identical to the two corporate aluminum blocks i have loose here, except its engineering numbers are different:
same ribbing, same freeze plug size and location, et cetera. as far as im concerned, the karkraft 'explorer' blocks are identical to cobra blocks of the same vintage. I have no experience with pre-'99 cobra blocks.
if anyone cares about the casting clocks, let me know and i'll post them too.
does your kar kraft block have any paint on the outside of it? It should still have its grading color on it. I'm looking for colors other than green or yellow, and if you have a yellow, does it have any manufacturing defects?
karkraft is the name of the company that built the boss 429 for ford. scott minch, a guy who dealt in boss9 parts, had in my opinion the reputation for having the real deal, but wanting real money for it. He eventually acquired the karkraft name and is doing business under it now. He doesnt seem to be that big of a pirate with his mod motor stuff, although prices on some of the stuff is higher than on others.
The few cylinders that I measured came in right at 3.550 +/- .0005kdanner said:Hey David would you measure the diameter of the iron sleeves in your block? Since it has an experimental part number, I'm curious if there is any difference there.
Hensler Racing said:I have a Question for those of you that bought a block from Kar Craft. Look really close to the cyl's and look to see if their is a tiny lip on top ( the top of the sleeve every aluminum block has this) If not look down about .400 to see if their is a little line and once again down about 1 inch from the bottom. Guy's do that for me and report back! James
I took a look at my block. At the cylinder head mounting surface of the block there is a small lip over the top edge of the sleeve. Meaning that the steel sleeve is not exposed at the cylinder head mounting surface. About 1" from the bottom of the bore, there is a line where the bottom of the sleeve and the aluminum cylinder bore meet. There is no exposed surface of the sleeve to measure its OD.Hensler Racing said:I have a Question for those of you that bought a block from Kar Craft. Look really close to the cyl's and look to see if their is a tiny lip on top ( the top of the sleeve every aluminum block has this) If not look down about .400 to see if their is a little line and once again down about 1 inch from the bottom. Guy's do that for me and report back! James