Because of the excessive oil consumption with my motor (8.5 quarts in 1700
miles is a bit excessive IMO), I have been working with Lee Johnson Chevy to get
to the bottom of the problem. We first tried updating the PVC to
the new Z06 unit and that did not work. Next was to bypass the PVC by
installing a filter type device to see if oil is being sucked up that way.
I was asked to drive the car for about 1000 miles and then we would check it
again. After about two days, the dealer called me back and said that GM
was going to replace the entire motor and that they also wanted to buy my Halltech
Tric intake! This triggered a whole chain of events and possibilities! A
new motor sitting on a crate, hmmmm, I could sure go hog wild and save a bundle
in labor in the process. I first needed to clear what I wanted to do with
Cliff Kemp, the Lee Johnson Chevy service manager. Since Cliff is a avid
hot rod kind of guy, he understood and okayed every thing I wanted to do.
Only problem now was that Lee Johnson Chevy really did not have any techs on
hand that could do what I needed. With Cliff's approval, they dropped the
motor off at Brads Custom Auto in
Lake City. Christian, is the man over at Brads Custom Auto, he does most
all of the hot rodding for the Corvette and Mustang owners around here. My
initial plan was to just do a cam, headers and Z06 clutch. So I picked up
a Crane cam, TPIS long tube headers and a Z06 clutch/flywheel assembly.
Christian was working on the engine still when I called and inquired about the
progress. This was a Tuesday and he told me over the phone that the motor
was not done since they were waiting for parts. Parts! WTF! I
know we did not need any parts to do these mods, but Christian had pulled the
factory heads to install/adjust the cam. Hmmm, now my brains a turning
again. Since Brads Custom Auto is going to make me pay for the new head
bolts and gaskets ($133), there was no way I was going to pass up this
opportunity. I immediately got on the phone to MTI and asked about availability
of their Stage III heads....two weeks! Crap, I need this babies right
away, so I am on the horn again, but who do I call. Lingenfelter?
Naw, I got it, Doug Rippie Motorsports!
These guys really know what their doing, so Vaughn hooks me up with set of their
heads from their top end package. He ships those bad boys out to me 2nd
day air and boom....now my engine is ready to go! Since the engine
is installed from the bottom, there was no way to install the headers ahead of
the engine install, so these pictures show the new engine with the stock
manifolds. The header install was later, so those pictures are at the end
of this page. Based on the past performance gains of my mods (Tric intake 17
rwhp, Borla XR-1 exhaust 8 rwhp). I am anticipating 25-30 rwhp from the
DRM heads, 10-15 rwhp from the cam, 15-20 rwhp from the TPIS headers.
Assuming a base dyno of 305 for the motor (my last motor had a base line of 308)
I am looking at 380 rwhp or 447 crank hp. According to DRM, the rwhp
rating is from a stock motor (no mods) so in combination with the other mods I
have, the actual rwhp gain could be more. Of course, I am not counting my
chickens before their hatched, only the dyno will tell for sure what this motor
is going to be putting to the wheels, but I will have to wait for that since the
motor needs to be broken in first. Steve Cole is programming a PowerLoader
for me, so here is another item to figure into the rwhp calculation. Not
sure what to expect (hp wise) from the PowerLoader, but I have seen other
Corvetteforum members net 10 rwhp with it. So maybe 390 to the
wheels? Can't wait to get this on the dyno!!!!!
Ok, here we go with the pictures. The first picture shows
the Crane Cam as it was shipped to me. The cam should be good for 10-15 rwhp
(it's kind of on the conservative side, remember I was not originally going to
install ported heads). The other pictures show the TPIS long tube headers, these
bad boys have 1 3/4" primaries and should net 15-20 rwhp. The engine
could not be installed with these on it, so they will be installed later.
On to the build of the new engine!
This first picture is the LS1 crate motor before any work was
done to it. The 2nd picture shows the rear of the motor with the old
clutch installed and the new Z06 unit just to the left. The 3rd picture
shows the back of the motor with the new Z06 clutch installed.
This picture shows the motor with the exhaust manifold and coil
packs removed. The next picture shows the motor with the intake manifold
and valve covers removed. The last picture shows you some internal details
with the valve covers removed.
The first picture here shows the engine completely disassembled
and all the parts as removed. The next picture shows the motor minus
heads, coil packs etc. The last picture here shows the stock heads with
the lifters and retainers removed.
The first picture here shows the front of the engine with the
harmonic balancer and water pump removed. The 2nd picture shows the motor
with the front cover removed. The last picture shows you the old cam and
other old parts. Notice the new hydraulic roller rockers...yea baby!
This is the front of the engine minus the cam gear, cam retainer
and of course the camshaft. Here we are installing the new Crane
cam. This last picture gives you a side by side comparison of the
combustion chamber, the DRM head is on the left and the stock head on the right.
This picture gives you a side by side comparison of the exhaust
ports, the DRM head on the left and the factory head on the right. The
next picture is also a side by side comparison of the intake ports with the DRM
head on the left again. The last picture is another picture of the DRM
intake ports
This last picture is the completed motor with the TPIS long tube
headers installed. Because of installation problems with the engine, the
stock exhaust manifolds were put back on the engine for installation, the
headers in this picture were only put on to take some pictures. The
headers will be going on soon.
Since GM bought my old multi-piece HallTech
Tric and nylon MAF ends (which, btw netted me an impressive 17 rwhp), I gave my
friend Jim Hall a ring and he sent me out one of his new one piece Tric's and a
set of aluminum MAF ends. This one piece Tric is a impressive improvement
over the multi piece unit . The new wedge filter is also quite
impressive. Jim has this system packaged up very well, he even includes a
hole cutter, a pattern and complete instructions! Way to go Jim!
This is the best bang for the buck mod you could do to your C5. Ok, back
to the other pictures. The 2nd picture shows my C5 up in the air and the
old motor being prepped for removal. The engine drops out the bottom along
with most of the suspension. The last picture here is just a table full of
parts that had to be removed before the engine could be dropped out.
This pictures show my new motor (after the mods) you can see the
Z06 clutch/flywheel in the first picture. This is pretty much how GM ships
these babies, minus only a few items, but for the most part it is complete.
The cat's and center section of my exhaust needed to be removed
before the motor could be dropped. The 2nd picture here shows the old
motor being prepped for removal, if you look close, you will see the small PVC
bypass filter that I talked about at the top of this page. The red hoses
were sent to me by Jim Hall and are used for the throttle body coolant
bypass. The last picture here shows the front suspension being prepped for
removal.
This first picture is just another of the engine being prepped
for removal. The 2nd & 3rd picture's are underside shots of the
engine bay minus the engine.
This first shot shows the inside of the engine compartment (from
below), the other pictures show the old motor freshly removed from the car.
More pictures of the old motor and front suspension as removed
from the Corvette.
New motor installed and almost ready to go!
More pictures and driving impressions coming soon. Stay
tuned!
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