ERE-355 (Blueprint Engines 355LT1)

ERE-355 #103
This is a Bluprint Engines stock LT1 rebuild.
It is 355 ci with 4-bolt main caps, Camaro LT1 heads,
Stock rods, Stock crank, .030" over pistons.
I will be installing the GM LT4 hot cam to up the power just a bit.

$2898 shipped direct to your door.

This is the Blueprint Engines part number BPG35029C

It is a good ol' LT1 with stock everything except the main caps and the .030" over pistons.

She comes with the 300 hp camshaft.

I'll be putting in the GM LT4 hot camshaft in a few days.

The engine arrived in perfect shape.  Squeaky clean.

Nicely painted too.

I like the main caps.  They are not billet steel but they are still 4-bolt.

Blueprint Engines even glued a serial number to the engine.

The M155 oil pump was in the crate but I'll need to add an the windage tray, oil pan, timing cover, crank damper and intake manifold.

Now that I have the GM LT4 Hot cam I will go ahead and install it.  First I washed off the years of storage grime and polished a few journals and lobes that had very minor surface rust.

This is a good quality "stock" rebuild.

The stock Corvette cam is a bit rusty.

The GMPP Hot cam is not fitting well.  The last 2 cam journals are tight.

Turns out that the stock cam that Blueprint used must have been too rusty on some journals.  This rear journal is .003" smaller than the GM Hot and other known good camshafts that I have in my shop.  That's why the Hot cam won't fit.
I gave a call to Blueprint tech and asked them if it is in their records that a few of the cam journals were turned down a few thousands (probably for removing rust).  That would be a somewhat typical thing to do for a stock rebuild and then they put in oversized camshaft bearings.  The only problem with that is that you cannot do a simple cam swap.  They promised to call back tomorrow.  It is no trouble at all to swap out a few camshaft bearings.  You never know what you'll find.

Look at the camshaft to the left that cam out of the engine and it does look like it has been "refurbished".  

Now let's get busy and pull the old motor.  We need a few parts from this.  Oil pan, timing cover, intake manifold, water pump....headers...etc.

It is a little bit grimy like any engine with lots of miles on it.

With this style of header I thought that it would be best to leave them on and pull the engine.  It worked well.  I'll install them on the new motor prior to placing the new motor on the motor mounts.

I'll try to clean this up as much as possible.

Note that the coil terminal was crusted up.  This may have been the reason the engine was hard to start.  The engine ran fine after it started though.

It is quite clean in the intake valley.

The oil pan was very clean and there is no sign of distress in the oil.  The coolant was pristine and the drained oil was clean. The next update will show the LT4 camshaft installation to the new engine and all of the parts transferred from this engine to the new engine.

Tried to fit the cam bearing tool in there but ended up having to take the crankshaft out.  I figured I would have to do that.  No biggie.

The center 3 main caps are pretty nice.  The mains are ACL brand bearings (.010" under) and the rods are Clevite (.010" under).

Installing the cam bearing I cannot reach in to see if the oil hole is aligned with my allen wrench go-no-go.  The boroscope comes in handy.

See the boroscope?

All cam bearings in.  They went in wighout a hitch.  They are the Durabond brand.

ACL main bearings.

I made sure to mark the rod bolts prior to loosening.  I'm sure that Blueprint did the 20ft-lb then 45* tightening sequence but you never know.  I set my torque wrench to 45ft-lb and that matched the marks perfectly.

The yellow is my match marks.

Main bolts to 77ft-lb

Now it is time for transfer of core parts.  The oil pump drive from the old motor is worn.  I'll put in a new AC Delco gear (on the right).

I installed a GM Impala SS oil pump and new windage tray.

Pickup at 3/8" clearance.

The oil pan is "clean".  The brown film is part of the pan now.  It is from 25 years of engine oil.

Cleaned up and painted the old timing cover....BUT...

Somehow I messed it up when I had it on the belt sander.

I'll replace it with one of my very nice powder coated timing covers. 

I have a nice tapered tool to allow for a good installation of the water pump shaft seal.

One last photo of the LT4 Hot cam serial numbers.

This is the stock hub that has a groove worn into it from years of service.  This cannot be re-used.

Intake manifold has been set on the engine to check for fitment.  All is good.

The intake will be painted prior to final installation.

Photo of the new Amazon sourced Opti-spark for my records.

Just noticed the stock catalytic converter rusted flange.  I have a few good cores up in the attic.  

Brand new AC Delco knock sensors.

Oil system test.  60 psig is good for stock-ish engines.  This is a stock oil pump for Impala SS.

Cleaned up oil pump drive with new gear.

FelPro intake manifold gasket

Just now noticed the busted stock flexplate.

This is a replacement stock style flexplate from SCAT.

Since the LT4 Corvette does not have EGR and the LT4 hot cam is installed...I deleted the EGR and capped of the ports with these inexpensive plates.

The coil wire was corroded and so I made a new one from my bulk Taylor wire kit.

The passenger side header needs to have the EGR port capped off.  I tapped the hole to fit a pipe plug.

That's it for today.  

Next day:  I was impressed at the port matching of this exhaust manifold gasket.  I do not recommend them for ported heads but these fit stock LT1 heads perfectly. SCE brand #411187.  I bought them as a 10 pack.

Oil cooler lines on. I don't install the oil filter until the engine is in the car.  The filter gets dented many times if it is on the engine during the installation.

Also cleaned up the thermostat housing and put in a Hypertech 160F thermostat.

What else can I put on the engine prior to hoisting into the engine bay?

The throttle body can go on but I cleaned it up prior to installation.  The idle air circuit especially needs a de-gunking.
Prior to installing the accessories and water hoses and other things, I make sure to start the engine (for a very brief moment). I make sure the fuel lines don't leak and that all the oil cooler fittings are installed.  Then I try to start the engine.
Well......the engine would not start.  1st impression is that it is not getting spark.  Time to troubleshoot.  My hunch is that the new and low cost Amazon optispark is bad.  Check back for more updates....

PCM power is good

All of this wiring is good.  The hard start was fixed by replacing the coil and the ignition module.  She runs well with no transmission and up on jack stands.  

New TCI torque converter

Rebuilt transmission

1st tune

Fuel system is not able to make enough pressure.  New pump and wiring harness on order from Racetronix.

Racetronix kit has arrived.  Here is the old stock pump on the cart.

Racetronix new bulkhead wiring.

Additional ground and the other side of the bulkhead wiring.

The beefy Racetronix bulkhead wiring.

Walbro 225 lph pump inside the stock pump holder.

Ready to put back into the fuel tank.
Pressure at the fuel rail in now perfect.

 Ellwein Engines 2021