Well I was reading the new GM high tech today and they showed the top products for 2009. Eagle came out with this kit

Eagle - Forged 4.375-inch LS-Series Crank / 383ci Stroker Kit for LT1
Just when we thought the aftermarket was forgetting about the LT1 engine platform, Eagle surprises us with a new 383 cubic inch stroker kit. This kit was designed to work with the stock bore diameter, and it includes a cast crank, I-beam rods, pistons and rings, as well as bearings. The new LS-Series crankshaft measures out a whopping 4.375 inches of stroke, and is forged from 4340 steel. This crankshaft is available with either the 24 or 58 tooth reluctor. Get some displacement for 2009!

Just trying to understand...so I don't have to bore out my engine? If I'm understanding correctly, this means this saves an **** load of money at the machine shop, and pulling out the block and what not. Right? Or am I dreaming lol

 

gm has been using a forged 3.8" crank for several years now to keep the 383 w.o having to bore their blocks. They figure it will save money by not having to machine the bores .030" over. look as the zz383 and the 383HT they both use this length crank.

 

Boring the cylinders is essential for a high mileage V-8 engine, and I thought it was only like $200 or something. If you don't and your cylinders are out of round, you'll have problems with compression, blowby, and the rings seating properly. Just seems like the worst possible corner to cut when you're in the engine that far and already dumping 3 grand.

And also, how does 4.375" of stroke clear the block, when you have to clearance it with a typical 383 stroker crank (3.75"?)

 

The article says LS series crank, and that youget your choice of reluctor wheel , it's not an LT based kit.

 

Wrong forum I think lol, however there is normally more than one way to get what you want.

 

There are two kits, one for big ci LS1s, and the other is a budget rebuild LT1 kit.

I would not "rebuild" a high mileage lt1 with cast parts and without boring it out. LT1s have been known to maintain surprisingly good condition cylinders though, so I guess it may be an ok option for a stockish street car that went down with low miles or something . It's not a performance kit for sure.

 

Ah yes...so i was just dreaming...