This thread began with a spun #6 rod bearing, and ended with a spun #6 rod bearing.

 

That’s to bad you put all that time and effort into the LS 7. The LS3 is a great motor also. If you really want the LS3 can be stroked out to 427 and make really good power. Nothing wrong with the LS3 and it can be built to make LS7 power.

 

OP, I really feel for you on the lost of your LS7. Keep an eye on the C6Z06 forum and the C6Parts forum, guys are frequently listing engines for sale. In addition to the GM crate motors, you have AHP, Blueprint and Katech offering quality LS engines with nice warranty’s. Good luck.

 

Since I already put a 427 emblem on my hood, I ordered this at SEMA. Comes with a 30 month warranty. It gets here on Jan. 2nd.
https://blueprintengines.com/product...ade-psls4271ct
Here some details about the parts used.

Below specs PSLS4272SCT.



Block: New GM 6.2 ltr LS3, aluminum, bored 4.070”

Crank: SCAT’s 4340 forged, 4.125” stroke, internally balanced, 58x reluctor wheel installed, internally balanced, 6 bolt flywheel.

Rods: SCAT 4240 forged, I-beam, 6.125”, ARP 7/16” rod bolts.

Pistons: Mahle Motorsports, forged, 8cc dish, 11:1 pistons, 11:1 compression.

Rings: Mahle Motorsports, matched set to pistons, plasmamoly, file to fit.

Bearings: Clevite H series, Tri-Metal

Camshaft: Comp Cam’s hydraulic roller, .624/.624 lift, 239/255 duration @.050, 114* lobe separation angle.

Lifters: GM Delphi, hydraulic roller.

Pushrods: Elgin “Black Ice”, hardened.

Rocker arms: GM LS3 with Comp Cams full roller trunnion upgrade.

Timing set: GM LS3, or SA Gear.

Cylinder heads: BluePrint’s LS3 type, rectangular port, 259cc intake/105cc exhaust runners, 72cc combustion chambers, 2.165/1.600 stainless swirl polished valves, Viton seals, bronze valve guides, performance valve springs to match camshaft.

Gaskets: Fel-Pro and GM.

Oil pump: GM LS3 type.

Oil pan: GM retrofit style.

Valve covers: Holley

Wire harness: GM LS3 retrofit kit. Includes wire harness, retrofit ECM, drive by wire 90 mm throttle body, drive by wire gas pedal, and all sensors.

Coil packs: GM LS3.

Timing cover: GM LS3

Intake manifold: GM LS3, stock type designed for 90 mm throttle body, composite material.

Harmonic balancer: Power Bond LS3 Corvette type.

 

Nice Christmas present for the Vette!

 

My God, that thing is a monster!

Have fun Bee Jay.

 

Nice!

 

That’ll work!

 

I don't understand. I thought you said you wanted 500HP? LOL

 

Great to see and hear!

Should be about 550-575 Net HP since that motor is rated Gross HP (crate engine) versus the LS7 rated at 505 NET HP (as installed in a vehicle). Either way your 79 will haul a**.

BTW-Took a ride in a family neighbors 04 M5 BMW with 160,000 miles on the odometer in South Carolina yesterday.

Stock M5 with double overhead cam V8 (400 net HP when new). This young gent installed an underhood supercharger on this car that cranks out 550 Net HP and, holy smokes, with long tube headers and Corsa exhaust this 4 door screams like my 10C6Z06..it is that fast....spins the tires rolling at any speed in 1st or second gear (6 speed) at will and sounds like an american V8. He bought the car with 140,000 miles on it for $5,500 (stole it) and it really looks great as well...sorry to digress...HP is HP..LOL

 

What a better way to spend an early Saturday morning than to read a nice 15 page thread in the C3 forum about a fella that truly loves his car. An enthusiast to say the least.

Trials and tribulations aside, I am looking forward to the next chapter in this cars journey.

This new engine should be down right scary in that chassis.

 

Do a search on this forum under “Bee Jay” if you enjoyed that, there’s much more.

 

Blue Print Engines dynos these engines at 630hp. Like Gordo said, “that will do”.
They had me at 427 with warranty!

 

Will do Bee Jay.

What are your plans for engine management with the new engine? Are you going to stick with the carb manifold? or more traditional fuel injection for an LS3? This car looks like it would a kickass setup for the Holley Terminator system.

 

I'm glad you found a solution to get it back on the road. I can't wait to see it on the autocross track.
Do you still think the 700R4 will hold up?

We were just thinking about you a few days ago and I was searching for your frame rail mod thread, because I'd like to try squeezing 315s under the back of my car and wanted to see how you did it.
I think with that new motor you'll be looking for even more grip back there.

-Chris

 

Sticking with the Holley Sniper on the carb manifold for now. Later, since I got a high rise hood now, maybe I’ll go with a ZR1 type blower intake on top. I guess Edelbrock offers an entire blower kit with ecu.

 

[QUOTE=CA_WxMan;1600710024]I'm glad you found a solution to get it back on the road. I can't wait to see it on the autocross track.
Do you still think the 700R4 will hold up?

We were just thinking about you a few days ago and I was searching for your frame rail mod thread, because I'd like to try squeezing 315s under the back of my car and wanted to see how you did it.
I think with that new motor you'll be looking for even more grip back there.

-https://www.corvetteforum.com/forums...clearance.html

 

The new 427 LS3 has arrived. Dropped off by this huge 18 wheel Federal Express truck. They really do a good job building crates for these crate engines. I immediately pulled the LS3 intake off and installed the Holley LS3 intake. This intake is 1/2” shorter than the GM LS7 carb intake, so I should gain some hood clearance.
I guess there are no LS7 to LS3 conversion threads, so I’ll just keep adding to this one if that is OK.

 

And for a $100 more you could'a had a LS3 Dual Plane Intake. Mid range torque if you need it: https://www.gmperformancemotor.com/parts/19244037.html

 

Ok, big problem. I got the engine mounted on the engine stand. Look at this oil pan! It’s 8” deep. I assumed I was getting the Holley retro oil pan 302-1. Here is the part# of the pan attached. I don’t this will work. Small problem, I have these LS7 valve covers. There is no way to add oil. Can I modify the engine valley cover with an oil filler cap? Also, the engine came with this cool small balancer with timing marks.