96LT4c4

I have the factory crank and cam that came out of my Vette. They are from a LT4. Both in good condition.
$50 a peice plus shipping

The LT1 heads, I had started to convert them to run on a SBC, as well as the intake. The intake is ready for a distributor.

I also have a set of LT4 valve springs $50
I forgot I had these. I just found them today.










I need $200.00 for the intake with all the work I have in it. And $100.00 for the heads. Everything has been cleaned and bead blasted. The intake comes with fuel rails and injectors, TB, and sensors

89F Body

iTrader: (1)

What do the heads need to be run on a std sml blk other that valves and springs?

96LT4c4

They will need to be decked and then use an SBC gasket to redrill the water holes. Then you will have to run the t stat water out the end of the heads.

racing geek

iTrader: (5)

How many miles are on the cam? Do you have any pictures of it? This whole package is really tempting. What's the part number for the heads?

96LT4c4

The cam came out of the motor with 47,000 miles on it. It is in perfect shape. I will get some pictures for you this weekend.

88SS6SPEED

iTrader: (2)

Could you send me pictures of the crank? I'm pretty interested in it. Thanks

breamrules

How much for everything shipped to 90022?

FlippindaBird

iTrader: (10)

still got the cam? where can i find the LT4 cam specs? ive actually been curious about it for a while

96LT4c4

http://www.grandsportregistry.com/lt1vslt4.htm

I would use 1.6 rockers with the cwm like they did from the factory.

FlippindaBird

iTrader: (10)

very cool site thanks alot, looks like id need new springs too, seems like the cam would be very similar to an LT1 cam if you used 1.5 RR just more duration which is probably why the 1.6s huh

96LT4c4

All LT4's came factory with 1.6 Crane Roller Rockers

FlippindaBird

iTrader: (10)

yeah i know but i was kinda wondering if it would work ok for a while without them, im looking into the summit aluminum ones for 160$ but i got a few other things on the grocery list first

96LT4c4

I will get a few pics up of the cam and the crank tomorrow. I was really busy today and didnt get to it.

RS-Chevy-SS

pm

vorticaldavid

iTrader: (1)

i also would like to see pics of the cam. take paypal?

96LT4c4

96LT4c4

The cam is coated in grease and sealed in plastic to keep it from rusting

96LT4c4

crank is also coated in grease and is sealed in plastic. All these parts came out of a 47,000 miles engine. Everything is in great shape.

96LT4c4

Just sold the intake and all the parts to go with it, injectors, TB, sensors, ETC....

Everything else is still available

Pat Hall

iTrader: (31)

Looking at the pics you did a heck of a nice job on the intake and heads. Looks like you actually TIG welded everything instead of halfassing it with JB weld. Looks like the crank is a cast one. I would've thought the LT4 would have a forged crank?

96LT4c4

I know.....I would have thought the same thing but all LT4's had cast cranks. They just did a little extra prep work on the LT4 over the LT1. The funny thing is I googled the part number on the crank that I posted a picture of and it came up as a 305 crank? I know I pulled this crank out of the motor myself. I turned my LT4 into a 383 LT4. I am going to have to take a closer look at that crank....do some research. I know that motor had never been apart.

I found this about the LT4 crank. It looks like mine is right. It has the grove cut in the journal.


The crank itself was improved via something called undercutting and rolling. Undercutting is the machining of a groove into the corner of a journal. Though this would seem to weaken the crank at that point, it actually makes it stronger where tensile stress is most likely to cause sudden failure. Rolling the undercut introduces compressive stress to the area. This makes it more durable, because potentially catastrophic tensile stress generated during high RPM operation must first overcome the compressive stress before that area of the crank is subjected to tension. Undercutting, a groove cut into the corner of a journal, looks counterintuitive, but makes a crankshaft stronger where tensile stress is most likely to cause failure. By undercutting and then rolling it, compressive stress is introduced. Tensile stress during high-speed operation first has to overcome the compressive stress before there's any tension on the joint. And as tensile stress is what breaks crankshafts, undercutting and rolling make the crankshaft stronger.


http://www.grandsportregistry.com/lt1vslt4.htm#CRANK

Pat Hall

iTrader: (31)

That's some interesting info. Makes sense to me. As far as the casting# goes, being the same # as a 305 doesn't surprise me either. The old 2 pc. RMS 350 cranks also shared the same # as the 305 crank. I remember looking up the # on an old 305 crank I had lying out in the garage on Mortec's website, and the application said 305 or 350. From what a guy told me at the machine shop, they're balanced differently for each engine size, but the crank has the same casting#. That also makes sense considering both motors have the same stroke length. It'd suck if anyone ever ended up putting the 305 crank in a 350 due to the same #. Probably end up with some funky balance issues!

89RSTBI

iTrader: (5)

I have a few questions. I have a vortec 350 from a 97 or 98 Tahoe and the numbers on the crank is the same but was wondering if this LT4 crank will work in it? If it will how much shipped to 28016? I was looking at mine and one journal has a deep groove cut in it (that i didn't notice until i was getting everything ready to take to the machine shop, and it would take allot of cutting to make it right). I have never done any chevy engines before but mine definitely has a groove yours doesn't have and just on that one journal and if I remember correctly that one main bearing was very very thin and broke off also so I am guessing it wore the crank

96LT4c4

Yes it will work, but you will need to be sure and have it balanced. The LT1/LT4 crank will work in any one piece rear main seal block. I am asking $50.00 for the crank. Shipping will be around $35.00, the crank weighs almost 50 pounds. Pay pal fee would be $1.80. Thats a pretty good deal since I know my machine shop charges $100.00 for a usable core crank. If you want it let me know I wont be able to ship it out until after this weekend.

96LT4c4

Sold the cam on Fullsizechevy.com

682XLR8

Recieved the intake today, looks good

96LT4c4

Good, let me know when you get it up and running on what ever you are going to put it on.

Thanks
Tim