Whipple Supercharged 383 Yukon Build

[Rave]

Kinda new here so I am just checking out the picture upload features and such. My build is starting this weekend so I will try to get some pics and details as I go.

 

[tobias]

Very cool, we'll be anxiously awaiting those pics!

[66nova]

Awesome! Look forward to the updates

[Z71kris]

 

, both of them!

[Rave]

First a little background on this whole deal. My Yukon has 121,000 miles on it. I have been running a Whipple Supercharger on the stock 5.7 for 4 years now. It works well. I have added water injection coming in at 2.5 lbs. boost to eliminate detonation issues. I use this truck mainly for towing a 24 ft. snowmobile trailer into the mountains and towing my son's '70 Chevelle to the drag strip.

 

The 383 idea came to be after the great success we have had with my son's Chevelle. The torque difference from that little bit of added stroke is impressive, so I figured it would be a no-brainer for a towing engine. Anyway, here is the combination I am using (pics on parts and build to come!)

 

An Eagle crankshaft with full internal balance, Scat cap screw connecting rods, Keith Black Hypereutectic blower pistons, Dart SS Vortec heads, Lunati 54755 Cam. So let the fun begin!!

[Rave]

Ok, I got the block home and started by doing a mock-up to check for crank to block and rods to block clearances. Crank is close on one counter weight but the rod clearance looks good. This is where buying stroker clearanced rods pays off.

 

Counter weight clearance (Just .006!!)

[Rave]

And here is the rod bolt clearance

 

 

And the top of the big end to pan rail

 

 

Just need to open it up a bit at the counter weight, clean things up and start the assembly

[Rave]

Here is today's report. Opened up the clearance at the counter weight. Cleaned up the block. Installed cam bearings.

 

 

 

Then filed ring end gaps.

 

 

Due to the combination of hypereutectic pistons and the supercharger, the top ring end gap needed to be opened up. The ring manufacturer had the gap at .022 and I opened it up to .032. Should be fine now for those long uphill max boost pulls.

[Rave]

Next it was time to install the crankshaft. The machine shop balanced it internally that way my balancer and flywheel will both be neutral allowing for a much more accurate balance of the rotating assembly.

 

The first picture in my thread is one of my crankshaft on the balancer.

 

Here is where some heavy metal (mallory) was added. (The shiny spot is where it was welded in and then smoothed off.)

 

 

And this shows where some drilling was done to bring everything into balance.

 

 

And now the crank is snugly nestled in the block as well as the camshaft - Next up, piston install

 

[pennzoil29]

That look's like a lot of fun. Keep the updates coming.

[BuckFeverZ]

Sweet build man

[Rave]

Thanks for the comments!! Just something about building an engine that still gets me going

 

Got all the rods attached to the pistons and aligned right as far as right and left bank.

 

 

Then went to work installing the spiro-locks, sorry for poor picture - those are a bugger to get in

 

[Rave]

Here's a wrap up of today's work

 

First a pic of the piston head showing the deep dish needed to keep compression at

 

8.6:1

 

 

Here is one of a piston heading into it's hole

 

 

And finally all pistons in

 

[Rave]

Then on to finishing head assembly

 

New dart SS heads and all new GM valves as well as K-Motion springs

 

 

And here the heads are installed with new head bolts and new screw in rocker studs

 

 

 

Now I am waiting for a different timing chain and gear set as the Cloyes True Roller I ordered interfered with the crankshaft position sensor reluctor wheel. Should have that by Tuesday and then finish oil pan install and lifters, pushrods, and rocker arms. Gonna have to schedule some down-time for the Yukon for the swap

[L29er]

Looks like you need to build and engine for my truck... once your done of course! (:

 

Good Work!!