I.D. this rod
 

Just broke down a 427 tall deck. I've been told that it's a stroked 482ci. It does have a 4" stroke crank and LS 6 454 pistons but I have no clue what these rods are. They have a number on one side (I cant find anything on it) and the other side looks like its been ground on. It's like that on all 8 rods to.
The number is 621-3404. Any help?

http://img22.imageshack.us/img22/3435/z4l6.jpg

mark they look like stock rods but they are side polished and most likelt shot peened and a good rod bolt installed..you sure its a 4'' stroke? the 427 T D came with 8:1 forged pistons..back in the day we would swap the ctlinder heads with rectangle port heads.add a asolid roller cam and lap a 671 blower on top..quick way to make 650 hp..

I am pretty sure that is an old Kiekhaefer rod. They were used on the 482's back in the day. But like Fixx says are you sure it is a 4" stoke? The 482 was 4.25

This is what I've I.D'ed in this motor so far.

Block
340220 .... 427T ...... 68-85 ... 4-bolt 1972-76 427 tall truck
-----
Crank 3963521 454 - 4 in stroke, 5140, raw forged –part # 3963524
(The crank has a 3521M on it.) This forged 5140 steel 4.00" stroke crankshaft is the highest quality GM offers for big-block V8s. It is nitride treated to increase its hardness and fatigue strength. The main bearing journals are cross-drilled to provide a constant supply of oil to the rod bearings. For use with Mark IV design engines only. Technical Notes: This crankshaft is externally balanced. It must be used with a counterweighted torsional damper and flywheel (or flexplate) for correct engine balance. Main journal diameter is 2.75"; rod journal diameter is 2.20". Crankshaft ID is #3521.". GM parts direct sells them for $700.60. List is $962.36
-------
Heads 3964291
RECTANGULAR PORT - Valve size 2.19 intake, 1.88 exhaust
1969-70 396/402 375 L-78, Intake Port 325cc 427 425, 435 L-71/L-72
-----
Crane Cams Part Number:138091
Mechanical roller tappet / Grind Number:TR-252/400-2-10
Basic Operating RPM Range:3,500-7,000 / Intake Duration at 050 inch Lift:252 / Exhaust Duration at 050 inch Lift:262 / Duration at 050 inch Lift:252 int./262 exh.
Advertised Duration:290 int./300 exh.
Factory Rocker Arm Ratio - Intake Valve Lift :0.680 in. / Exhaust Valve Lift :0.708 in.
Valve Lift with Factory Rocker Arm Ratio:0.680 int./0.708 exh. / Lobe Separation (degrees):110
Intake Valve Lash:0.022 in. / Exhaust Valve Lash:0.022 in.
------
3906629 oil pump
OEM GM Oil Pump Assembly with P/U For Chevrolet/Corvette Big Block Engines. The part number in the casting is 3906629 GM3
---------
Main Bearing
5203 / .010
Rod Bearing
(6) 5177 / .010 - (2) 5177 / .020
------
Pistons 3999295 454 - LS6 - 1971 - 9:1
Pistons Part number=6262976
Engine=454
Compression Ratio=9:1
Size=Std.
Dome Type=Closed
Pin Type= floating
Should originally be from a 1971 LS-6
--------
Holley 850 D/P
list # 4781-2
model # 4150, 850 CFM
Dbl pump
80 jets in both ends and a 6.5 power valve in both ends
renew kit part # 37-485

Also notice the cut on the crank rod journals. Never saw 2 different sizes before (the .020 over size is on 7 and 8's journal).

Not sure...I will defer to Mark. Looks like a casting mark that a specialty casting shop would use that matches a customers PO #. nice looking piece of hardware BTW.

my guess is it probibally spun a bearing and instead of regrinding all the rod journals they just did the bad one,back in the old days a lot of things were done as a quick fix.

i have never seen that rod before but it looks heavy.

Yes, they are very heavy! I had 2 sets of them in the 482's that came with my Cig when I bought it back in 1978.

Very heavy. They make the Scat *26385716 - 6.385 in. Connecting Rods - Floating Pins -I Beam Forged 4340 steel I have in my 496 look like toys.

http://img547.imageshack.us/img547/4059/qqyb.jpg

Marc, you have any specs on them? Like length and such?
Also were your 482's full roller motors? Before I got it I did a little research on the 482. I expected aluminum roller rockers but this one also has a roller cam and lifters, 7/16 pushrods and guides, rotators taken out of the rectangle heads with big valve springs.

Also a couple side notes. The rods are floaters (pin) and the pistons are to with spiral locks even though the # on them says they are press fit. Anyone want to take a shot at that?

Thanks for your help folks. This 427 thing is all new to me and I have a bunch of questions. Like a 454 water pump should fit it, right? Have to put all the front stuff from a 454 on it being this motor is going in my Biesemeyer drag boat and the motor from the Bies will be going in my newest project (this is for you fixx) Donzi Classic 18.

http://img844.imageshack.us/img844/8128/s0se.jpg

That was a very long time ago! I don't have (or remember) anything on them anymore. Sorry

4.25 bore x 4.25 stroke kind of sticks in my mind though, and that does = 482

Those look allot like ford 428 CJ rods ............. ???

do you have one that you can post a pic of?

all your external 454 parts will bolt up to the 427.how about posting up a pic of the bies,i love those old boats,i have a 1975 hondo t-deck.

Its been a few years since I have seen one up close but here is a pic off the web. [ATTACH=CONFIG]513983[/ATTACH]

This is a picture I came up with off the web

http://www.428cobrajet.org/sites/def...ges/rods-1.jpg

This is mine. Would make sense of why this side was ground off on all 8 rods. Ford parts in a Chevy is a no no even though there is some parts that do interchange.

http://img42.imageshack.us/img42/4246/8m0d.jpg

Had to take the crank to my crank guy. It has an issue or two. He told me about how racers used to cut the rear rod journal another .010 over for some reason. He doesn't think it made any difference. So after it is fluxed to see if its cracked (it didn't pass the hammer test) it will all be cut the same all the way across.

Biesemeyer picture? That's easy.

http://www.supernova19.com/resurrect...e/1dc204e0.jpg

http://www.supernova19.com/resurrect...oint_hydro.htm

Also, have you all ever see a oil pan like this?

http://img132.imageshack.us/img132/8210/8ycb.jpg

They have one on ebay but they don't seem sure what size it is.
http://www.ebay.com/itm/1965-90-Chev...-/390619401001

428 CJ's where made with two different rod lengths one of which was 6.530. Back in the 80's the aftermarket rods that would have been available would have been high end race stuff that would look nothing like a OEM forging. Those look like a OEM forgings and the CJ rods are the only rods I have ever seen with a beam like that. I have never heard of it being done but could it be that a engine builder used 6.530 CJ rod in a GM tall deck block because affordable 6.535 where not available yet?

they do look a lot like the ford rod.sanding&polishing the rod beams is a stress reliever and used to be very common.i like the bies,cool old boat.

Thanks again for the help folks. I know a few of you all's first thoughts was to dump the motor and get a 454 and stroke it. But if you look at that little blue and white boat a couple posts up, if there was ever a boat that deserved a early 1970's Mark IV, 472, stroked to a 482+ci, complete roller, super beast that this motor is turning into, it's the Biese.

Thank goodness this thread is in the Technical section! I'd have never opened it in the Uncensored section!

i think the bies will not like all that power.i put a gale banks 800 hp twin turbo engine in my hondo and took it for a ride.1 time and it scared the crap out of me.i sold the engine to a buddy and someday il put a 500 hp or less engine in it.i really like the old hondo and some day il have time to get her going again.

look closely at the ground side of the rod and it probably say Kiekhaefer. they were custom made for the 482 as Mark said. have the crank checked to know what the stroke really is. that crank was availible as a raw forging and were cut to 4.25 for the 482. yes the rods look like a ford rod and they are the only ones made for a chevy like that as far as I know. somewhere in all the crap around here I have an article discussing those motors.

At the moment it has a Gen V 454 with a pretty stock bottom end. When I got the motor it had very few hours on it (it was a back up generator for a AM radio station) I did some top end stuff and refreshed the rest of the motor. It's pretty stout now. To be honest I would even think about cutting the 427 down a bit just to have it in the boat. It belongs there a lot more then a GenV 454. The biese is not the greatest long rider anyway being it's a 4pt hydro drag boat. Point it, stab it, hold on for dear life, try to slow down without wrecking, what a rush. Made a lot of changes to the set up this fall and never got to check out the results. Also had 2 real hydro props (2 and 3 blade) re-bent for it and never got to try them either. Having this motor too for it this spring...... That Donzi may end up next falls project.
I do have a fall back plan though. If the 427 is not the motor for the Biese, the way I plan on putting it back together (for the Corvette enthusiast) I'm sure it would be an easy sell.

i still have some v drive stuff in the shop somewhere,what v drive is in the bies?

I half asses tried to measure a rod tonight and came up with it being 6.395 long but that don't sound right. I've looked at them with everything including a black light and cant find anything under the grinding. Just the mystery numbers on the other side.

6.385 would be + .250 ,that is common for a 4.250 stroke.if you dont use that engine i think it would be an easy sell in the swap&shop.

The original HallCraft with 1.21 overdrive gears driven by the 454 to a B/W 1 to 1 trans. It may be a drag boat but it has reverse and neutral while the motor is running. :drink:

That's why I want to put it in the Biese. The motor is just to nice to let go and I need a motor for the Donzi project. The almost new Gen V 454 from the Biese in the Donzi will be a better seller then the crazy 427. And when you look at the Biese it looks like it should have a crazy super beast 427.
I just need to get my mind around this thing and these rods are screwing me up. Also I found some groves in the cylinders tonight that didn't come out with honeing so they will have to be cut. That means new pistons like the LS6's are in it now so they fit the closed chamber heads.

i thought the ls6 was an open chaimber design.

hay mark,,back in the day we use to take a 454 crank and have it ground to a offset,then have it renitrated,then we would use a 1.980??? small block h beam rods and have custom pistons made for the older bowtie blocks..total cid was 509..

if those are true LS6 pistons they should be TRW slugs. with the closed chamber heads it will be close to 12 to 1 compression. the engine for my Wesco v-drive flat is the same pistons and heads and that is what it comes up to. the original tall deck pistons are are taller and I think had 4 rings if memory is correct. that is why the 4.25 and longer rod is needed to make up the distance. if you figure out the numbers that rod works.

ls6 had 291 closed chamber heads......ls7 was open chamber

the first ones were closed chamber, then they went to open chamber. you have to remember that more of the LS6 motors were sold over the counter than in cars. they started out at nearly 12:1 and then the later ones dropped the compressions. they were sold new into the late seventies at least.

It is but this is how it's built,
Block 340220 .... 427T ...... 4-bolt 1968-85... 427 tall truck
Head 3964291 RECTANGULAR PORT - Valve size 2.19 intake, 1.88 exhaust, closed, 108.9cc
Pistons 3999295 454 - LS6 - 1971 - 9:1
Crank 3963521 454 - 4 in stroke, 5140, raw forged (I guess now it could be a 4.25 until it is measured)
Rods ????
Now I was told that this motor was a 482 and I found it wrote on the crank balancer but that could have been an inventory number for all I know. A lot of the parts say it is but this one also has a roller cam and lifters with the roller rockers that were expected. It also has these rods that are floaters and the way the crank oil holes were chamfered and the rear rod bearings being a different size and the front cam bearing oil passage has a hole drilled through the block into it so oil will feed behind the top timing sprocket so it wont dig into the block with the roller cam.
Did I say I like 454's?

i did a little research it looks to be a 7.9 l 460 trs engine...it mentioned the oil paw was liquid cooled?? found this on the net..see if you can match some part numbers.. http://www.boats.net/parts/search/Me...%29/parts.html

That's what the numbers say it is and it looks like a LS piston. The guy I got it from kept saying it was a compression monster but that didn't fit the 482 profile. It's supposed to be a 9.1 to 1 but I'm starting to think this was not a factory build even though it has a mercruiser oil pan. Never saw a mercruiser come with steel freeze plugs and solid lifters.

http://img560.imageshack.us/img560/227/kkvr.jpg

Thanks Mike. I've see that but the years are much later and the numbers don't jive.

is the piston a flattop or does it have a dome?i think it is a merc built 482.that was one hell of an engine in its day.