Thank you gentlemen! We appreciate the kind words, I'll share them with the crew!

Kevin, can you share with me the supercharger heat exchanger part number? I like the mounting tabs, etc.

I like where this is going. The crew is doing a very good job at a reasonable pace. Especially for having to work around a fully finished car for the second time. :)

Sure - it's C&R 56-00019.

Thank you! There have been some part hang-ups along the way or we'd be further down the road at this point. But you know how it goes, you cannot predict the speed of suppliers and service providers. Overall progress is going well. Thanks for the feedback!

What's important to note about the heat exchanger for the LT4, the inlet/discharge are on the driver's side vs. the passenger side for the LSA.

Thanks!! After I asked the question, I realized he had a LT4. Yeah, I called C&R this morning and asked what's the differences in LT vs LS heat exchangers and where the line connections are essentially is the only difference. C&R said if you have a water-cooled supercharger, either one would work as long as you didn't mind which side the lines routed to.

Things are coming together on the LT4 swap.

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Supercharger coolant pump is mounted low on the subframe.

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One fender in place, power module shown in foreground. The supercharger is removed to install some fittings.

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Inside in LT4 supercharger. “Bricks” on sides are heat exchanger / intercooler coils.

https://lh3.googleusercontent.com/-q...03-27.0007.JPG

The top of the LT4 sans blower. Insulating foam protects the fuel lines below.

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Injector pump and internal fuel rails for the direct injection system.

https://lh3.googleusercontent.com/-T...03-27.0012.JPG

Installing fittings for the coolant system.

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Bottom side of stock LT4 supercharger “hat”.

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Blower base back in place.

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And the “hat” back on the supercharger, held down by ARP bolts!

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https://lh3.googleusercontent.com/--...03-27.0044.JPG

There goes the warranty. LOL When do we get to hear the "varooom, varooom" sounds?

This was a take-out engine from another car, so there were no warranty concerns from the start. The GM warranty is pretty good on crate engines, and we are an approved shop for those installs, and have been through the process with them. It went very smoothly. This one had some miles on it when it arrived, but outside of a few sensor issues, it seems healthy.

Vroom vroom to come shortly!

Thanks!

At this point, the decision was made to install the later version of the LT4 supercharger hat, which will accommodate water / methanol injection jets from Nitrous Express.

Water / Methanol injection is a great tool to reduce the intake charge temperature, allow for more aggressive ignition timing, and therefore increase the power output of the engine.

The system uses basically the same solenoid system as a nitrous oxide kit, but this time, it’s spraying a water / methanol blend under much lower pressure. A reservoir tank and pump are needed, as well as some form of controller to make it work.

Here, the jets are plumbed into the new hat and the solenoids are mounted. Nitrous Express provides this service, which came out great.

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Alcohol pump:

http://v8tvshow.com/V8TV_2/images/Re...05-15.0017.JPG


The new hat didn’t match our desired color scheme, so it was cleaned, scuffed, and masked for some new color.

http://v8tvshow.com/V8TV_2/images/Re...05-15.0032.JPG

First color is a charcoal gray found in various accents on the car, like the window trim and door handles.

http://v8tvshow.com/V8TV_2/images/Re...05-15.0043.JPG

Then the fins were masked and the second color was applied, a bright and vivid red.

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After unmasking, the fins were stripped and the ribs were returned to a natural aluminum finish.

http://v8tvshow.com/V8TV_2/images/Re...05-17.0062.JPG

The end result looks factory clean and custom tailored to the car. We also tuned up the LT4 badging and gray on the coolant hoses.

Looking good!

http://v8tvshow.com/V8TV_2/images/Re...06-05.0200.JPG

The liquid side of the alcohol injection system required a pump and a reservoir, so we built a tank to fit in the driver side rear quarter panel out of stainless.

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Here, the screw cap bung is TIG welded in place.

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http://v8tvshow.com/V8TV_2/images/Re...05-19.0185.JPG

The tank and pump fit neatly in the trunk.

http://v8tvshow.com/V8TV_2/images/Re...05-19.0181.JPG

Here it is just before being painted.

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http://v8tvshow.com/V8TV_2/images/Re...06-05.0203.JPG

Next, the team wired up the T56 Magnum transmission using a Bowler All In One harness. This is a handy piece that incorporates all the connections required on a T56 for safe operation into one harness.

http://v8tvshow.com/V8TV_2/images/Re...06-05.0210.JPG

From Bowler:

“The All-in-One harness solution for the Tremec T-56 Magnum transmission comes equipped with all the connections pre-wired into one harness for a simple installation and ease of use. The small epoxy sealed controller is mounted to the VSS output using the existing bolt, and once the unit is powered up you will be able to connect via Bluetooth to your Apple or Android smartphone using our free app. The app will give you the ability to customize the input and output settings for each feature to ensure proper operation in your vehicle. The All-in-One harness eliminates the need for any additional equipment to operate the reverse lock out or generate the correct speedometer signals coming from your Tremec T-56 Magnum. This All-in-One harness solution is the perfect finishing touch for any Tremec T-56 Magnum conversion, and the only harness you will ever need.”

Unit mounted:

http://v8tvshow.com/V8TV_2/images/Re...06-05.0217.JPG

And the Dakota Digital OBDII interface to send the signals from the ECM to the dash.

http://v8tvshow.com/V8TV_2/images/Re...06-05.0220.JPG

These devices simplify the communication betweed various digital and analoge systems making it far simpler to perform these kinds of swaps.

Soon, the intake tube was made and the LT4 was ready to fire!

http://v8tvshow.com/V8TV_2/images/Re...06-05.0208.JPG

Very Nice!!

The LT4 was finally ready to fire, and the crew double checked all the connections, hoses, fittings, and added some fuel. The calibration is from the GM Performance ECM with some adjustments made to accomodate the Drive Junky pulleys, exhaust, and custom air intake. We use HP Tuners software and worked with Mike Norris on the calibration to get the car in a driving state.

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Initial drives we casual, as we datalogged the ECM and would beam it over to Norris for analysis. We’ve tuned many an LS, but this was LT4 #1, and we trust Mike to be a great resource on these kinds of projects.

http://v8tvshow.com/V8TV_2/images/Re...07-03.0229.jpg

Soon we were ready to strap it down on the dyno and put some power to it and perform more datalogging and refinements.

http://v8tvshow.com/V8TV_2/images/Re...07-03.0224.jpg

Trevor at the wheel of the car and tune…

http://v8tvshow.com/V8TV_2/images/Re...07-03.0225.jpg

The results… 670 HP / 720 TQ corrected for weather at the wheels.

http://v8tvshow.com/V8TV_2/images/Re...07-03.0227.jpg

Driving the car is a blast… when the power comes on, you’d better be ready! It shreds tires at will. Two V8 Team members Trevor and Tyler took the car on a 600 mile shakedown run to the Holley LS Fest in Bowling Green, KY, with no major issues, save for a power steering leak at the rack. Overall, it was a great ride for them. Our freinds at Forgeline were kind enough to host the car for the weekend.

http://v8tvshow.com/V8TV_2/images/Re...09-08.0004.jpg

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However, we’re not at the finish line yet. It turns out that the car has an issue with the throttle during upshifts where the RPM climbs a bit after the throttle has been closed. It seems this is a “thing” with LT4 swaps, and we’re working with GM and a few others to land on a solution… more on that shortly!

1969 Camaro LT4 Swap Install Video Part 1
 

We'll post episode 2 soon.

LT4 1969 Camaro Install Video Part 2
 

The next chapter in the 1969 Camaro BBC to LT4 conversion video series.

LT4 1969 Camaro Install Video Part 3 Driving / Dyno
 

1969 Camaro LT4 install video Part 3 - driving and dynoing!

Car's incredible Kevin. Cool vids and a great car!

Thank you! We appreciate the kind words!

What a killer build! What was the culprit with the throttle up shifting issue?

Thanks!

We'll report the answer to that question soon. We've got it back in the shop now.

More to come!

We think we've finally solved the RPM flaring issue with these LT4s wanting to continue to rev after you get off the throttle.

More to come on this!

The suspense is killing me... :poke: :)

Don

We discuss our fix for the LT4's RPM issue in the latest episode of V8 Radio. You can jump to the 43 minute mark to get right to it (but you really want to listen to the whole show, right?)

** We don't reveal the fix, but we do discuss how we approach these going forward. It will make sense if you listen.

V8 Radio Podcast link:

http://bit.ly/V8Radio06012019


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