We recently got our first LT4/8L90 combo in for harness/control system development! We should have it up and running soon and then maybe install in something to dial everything in.

It should be a fun package at 650 horsepower!!










No pricing or anything in place yet. Stay tuned!

 

Shifts faster than a PDK. What, are you, impatient? LOL

 

Please, please put it somthing sleeper and unassuming!

 

i want to see a stock ls1 98-02 with a 8L-90 swap

 

Preferably with vinyl woodgain on the sides!

http://carphotos.cardomain.com/ride_...1_original.jpg

 

John,

Can you explain what is happening with the slip yoke in the transmission?

Andrew

 

The splines are on the external surface of the yoke instead of internal. Since they are external you can't use the usual wiper-type seal that mounts in the back of the tail housing, so they cover the whole thing with an accordion style boot that clamps to the tail housing and the yoke.

I'm not sure that it's a better idea, only that it's different.

 

interesting it looks like tri-y manifold.

 

Yes, they are a tri-y type layout.

 

Very cool!! What are the diameters of the pipe and collectors if you don't mind my asking?

 

John,

What is the pump at the front bottom of the drivers side? Vacuum? Will these DI engine have oil control issues without the use of a vacuum pump?

Is this what GM did to slow /eliminate the carbon buildup on the backside of the intake valve othe DI engine are known for?

Can you also give oilpan dimensions? Doesn't look like it will swap into anything other than trucks. Too low. If you ever get a drysump setup, could you PLEASE post up oilpan dimensions ?

thanks !!!

 

One measure I see on this engine is what appears to be a factory catch can with a drain right back into the oil pan. You can see the black plastic tank around the heater house connections and the tube back to the pan.

 

Is it just me?

Or does the output shaft look dainty for beef of that size trans

 

Any idea why the drivers side manifold doesn't have perimeter welds on the front two head tubes but does all the rest?

 

Its interesting to see the progression of factory horsepower follow many aftermarket product benefits. Ill be watching this one!

 

That's just the A/C compressor. These look like they have a pretty elaborate oil separator/PCV system on them. That's the black plastic "box" behind the water pump pulley. Time will tell if there will be any carbon buildup issues.

 

Correct!

 

I don't know the dimensions of the exhaust or collectors right now but they are fairly small. They don't really look 650 horsepower size!!

 

Looks like cylinders 1 and 3 have tubes and I bet they have welds on the inside. The other cylinders have constructed sections and are welded together. I bet it has to do with fixturing, and robotic welding.

Andrew

 

It's hard to tell from the angle of the pic, but none of the tubes are perimeter welded to the flange. It's some kind of clam-shell construction where different pieces are welded together, either to form the tubes or to add heat shielding.

Here's a view from the top.