My Gen 4/5 engine build (track car)

[TooBlue]

I have been anxiously following the threads regarding the Gen 5 intake and cam "experiments". I hope this thread might help to provide more info regarding the
task of getting more horsepower and durability out of our Gen 4s.

*This engine will be going into a dedicated track car so please keep that in mind.

Some background....

Back in November, myself and the other track nuts from St.Louis headed down to Atlanta. We were going to run AMP on a Friday and Road Atlanta on Saturday/Sunday.
We arrived at AMP early on Friday and I winched the car out of the trailer. We were were all pump'd and ready to start a three day, two track weekend...!
I fired the engine at the bottom of trailer ramp to warm up and move to the paddock. I noticed that I had "O" oil pressure...??? I thought this was odd especially since I had
just completed a complete fluid change on the car the week before. I even drove the car for about 20 miles on some backroads just to make sure there weren't any problems.
Anyway, I immediately turned the car off and restarted. Same thing, no oil pressure. I figured it was probably a gauge failure or something simple.
I manually activated my accusump and the gauge went up to 5# and fell back off to "0"....
Long story short, after changing the filter and some other attempts at fixing the problem without success, I winched the car back into the trailer and drove the 9.5 hours back home.....

Got the car home and found the problem. There was a piece of metal stuck in the oil pressure relief valve. Obviously the bigger problem here is where did that piece of metal come from. After further investigation we found the problem. It was a piece of the roller lifter...
This is what we found...
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This obviously flattened the cam lobes so the cam was junk....

Further investigation uncovered a spun bearing and some block damage...
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myPic.jpg



Soooo..... Obviously I am building a new engine. To make it interesting, I am scheduled to run this car at C.O.T.A. Feb 7-9...
I WILL be there so I am doing everything possible to get this car ready.

Luckily, I have located all the parts, the machine work has already been started and the wheels are in motion...

This is the engine I am building;

-I am using forged pistons/rods from Arrow. I am however bumping the compression from the stock 10.2:1 to 11:1
(Going to custom "fit" pistons and get assembly balanced/blueprinted)
-Gen 5 intake
-Gen 5 cam ( My OEM cam was flat so I had to get a new one anyway. Why not turn it up.... ))
-New "race" lifters....?
-Ported heads (from BBG) with ARP head bolts
-Mopar performance ECU
-M/M headers, no cats and 1 ACRX type muffler

I have a Rockland Transzilla trans. with Toddy's clutch/flywheel/slave set up behind it.

I have about 4 weeks to get this done before C.O.T.A.. I will update this thread as the build goes forward.

I will definitely post the dyno numbers when completed....


I also have a BBG ported Gen 4 intake. We hope to have the time to swap intakes (after COTA) and get a hp comparison between the Gen. 4 ported intake and the Gen 5 intake on a "massaged" Gen 4 engine.

It sounds like there may be a more affordable way to tune the Gen 4s in the near future. This will obviously help quite a bit too...