Secondchance - 380 build begins!

[RICKYRJ1]

Very cool Yun, keep feeding us Z mortals more pics/info great stuff

[Schrade]

Originally Posted by SAM/CH ZR-1

In my 383 (4.030 bore x 3.75 stroke) I have stage 1 inlet and stock exhaust cams.
My engine has the following additional mods.

-37.5 mm inlet ports
-Headers
-2.75 Inch PowerEffects exhaust System
-catalytic converters
-SGC base chip (thank you Aaron)

With 800 miles on the clock and without a final adjusted chip I went on a dyno and it pulled about 560 HP at the crank. Here in Europe we measure always the power at the crank, unfortunately.
The car has stock gears and is as fast as a C6 Z06. The weight of my ZR-1 is 3'530 lbs

With a adjusted chip and better modified secondaries there is still space for some additional HP's

Sam

Did you happen to do a Before + After HP reading of the PE pipes?

I'm curious if any more HP comes with this PE 3" hardware, over what Marc says is available by opening up the resonator restriction (I think he says 10??? ),

Jeff? [Shrek]? You happen to know?

I'm sure I lost double-digit HP's + TQ with the automatic - tranny fluid pump, TQ convertor, etc., ...

[A26B]

Would you mind taking a shot of the #4 & #5 main bearings? The #4 seems to be the one that wears the most. I think the wear & wear pattern look very good. How many miles on the engine?

Thanks for the photos.

[secondchance]

Originally Posted by A26B

Would you mind taking a shot of the #4 & #5 main bearings? The #4 seems to be the one that wears the most. I think the wear & wear pattern look very good. How many miles on the engine?

Thanks for the photos.

Jerry,

If I can stop by the shop early next week, I will take close ups of all.
I have 140,000+ on this engine.

May I ask what prompted "the wear & wear pattern look very good"?

[Jagdpanzer]

Yun,
I'm with Jerry, by the looks of the photos the bearings appear to be in darn good shape for 140k miles.

[secondchance]

Originally Posted by Jagdpanzer

Yun,
I'm with Jerry, by the looks of the photos the bearings appear to be in darn good shape for 140k miles.

Glad to hear. While at the shop yesterday looked at the new main bearing set from Kurt with Lloyd. He told me those were King Bearings and would have been his choice.

I don't know the sequence but these are upper mains.

[5ABI VT]

Awesome stuff keep the updates coming !! Love watching motors get built Unfortunately for me I built a 388 for my 93 and it blew up, and shelled out for a all out 370ci build the second time around.. and then bought a z I sure wish I spent all that on an LT5 build ! But as my wife always says I'm OCD when it comes to anything that I want... and a built LT5 is what I want!!

Picking up a lot of info on build ups from threads like yours thanks again for sharing If I may ask all the guys, Is there a source atm for stroker cranks ? OP did you consider a stroker crank?

[secondchance]

Originally Posted by 5ABI VT

OP did you consider a stroker crank?

Sure did. But the cost was prohibitive - about $6,000 from what I understand.

Stopped by the machine shop this afternoon. Short block is almost done. Lloyd was torqueing the rod bearings - I think!



A peek from below.


A close up.

[USAZR1]

Yun,what did you use for con rods & pistons?

[Scrrem]

Looking Great Yun!
Rich