C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

C4 Procharger Install

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Old Sep 6, 2023 | 08:45 PM
  #81  
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Originally Posted by Mike in Boston
I lost a few of those spacers that go between the head unit in the bracket over the years when removing and reinstalling. I recommend you order up an extra set.

Nothing more frustrating than dropping it and it doesn't hit the floor
Thanks for the tip Mike. Its already happen. Lost one that took me 30 min to find.

The C4 has a tendency to suck up what you drop in her. Always scares me when I drop anything. If I don't hear it hit the floor I know I'm in trouble.

I ended up with spare spacers. I have a polished set and a raw set that I'm actually using instead of the polished set. I wanted to break up the polish.
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Old Mar 11, 2024 | 09:10 PM
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Had a little set back, nothing to do with the vette.

Had to re-landscape and pour cement to about 700 sq ft of the property to house the new toy.




Not all of it was just for the trailer. One of those things where you are there might as well do it, kind of thing.

For now it's as done as its going to get until I finish the Vette.

Also, I had to do a few things to my Harley since I use it a lot more now that I'm retire. Its kind of a daily driver now so it had to be done.


Now the Vette.

You know!, most of the install went smooth till I got to the intercooler and intercooler tubing. It's actually been a bit of a nightmare to be honest. At this point, I realized the bolt on kit got thrown out the door which I thought would be earlier in the game. I knew it wasn't going to be a true bolt on (nothing ever is), but I didn't think when I got the intercooler part it was going to give me as much trouble as it did.

For the most part putting the intercooler together was straight forward except the airscoope that came with the kit did not have predrilled holes.



This is where the kit begins to take a left turn.

The aux fan is suppose the go inbetween the intercooler and the condenser. I guess if your dealing with a stock corvette it might work. IDK, I have a aluminum 3 row radiator so this was not going to work. Well at least I'm thinking the size of the radiator was the cause of not getting the aux fan in. To be honest even if I had a stock radiator in there I just don't know if it would work regardless.

Nevertheless, I had to re-think how to get that intercooler away from the condenser if I was going to have a chance on getting any fan in there. So I hacked up the intercooler bracket somewhat and moved them underneath the hinges to get it back away.
Procharger suggest they go above the hinges.

Now I'll just fabricate my own brackets.




Of course 3 fans later the intercooler was finally mounted. Ended up going with a Derale Performance 14" fan to use as an aux fan. It fits perfect on the on condenser in-between the upper and lower housing. So,
why go to all the trouble for a fan. It gets hot in central Cali in the summer time. Its common to see over 100 degrees and I got to try to have my a/c. This fan pushes out almost 2000 cfm. Between this and the
main fan I hope it works out where I can use the a/c if needed.



The intercooler tubing was not any joy either. I don't like how low the tubing sits underneath the Vette. Here is a mock up shot:




The driver side is not that bad however; the passenger side would have to be lower as you can see in the photo. I’m still working on this side, I might have to massage the tubing a bit to actually get it up higher. Oh well, so much for bolt on. LOL

The tubing seem like a maze at first.





If you have a/c you'll have to relocate the bottle due to the passenger side tubing.




As you can see it all works but it is so tight in there.


So for now this will be the last time this is mock up.




Next post should be the initial start up plus a video.

I've already made serveral videos since I posted the last one.




Currently, I'm trying to hurry this up because I am getting set up to go into Hernia surgery and I want to have at least this part completed before surgery. Unfortunately, lifting weights, lanscaping and pouring cement finally done me in. All the stuff that my back surgeon told me I could not do anymore.

For now this is all I got. Looking forward for the 1st fire up.

Oh, and a big shout out to "drive it" who has already done this to his Vette. He lives in Cali so his expertise on the smog deal is a big help. Thx you sir and the next time I'm that way I'll treat you to a good dinner of your choice!







Last edited by corvted; Jun 11, 2024 at 06:44 PM.
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Old Mar 12, 2024 | 04:30 PM
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Great!
You will be surprised by the sound, it's the best!
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Old Mar 13, 2024 | 12:26 AM
  #84  
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Originally Posted by MrBigDee
Great!
You will be surprised by the sound, it's the best!
Thx for the heads up BigDee!

I been told the initial start up was going to scare me but once it levels out it's a sound like no other. I'm so looking forward to hearing the music coming from my own Vette.
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Old Mar 13, 2024 | 02:50 PM
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You're right!
Here's a little taste of what awaits you, at least I was scared when I started the engine for the first time.



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Old Mar 13, 2024 | 08:21 PM
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There is nothing like a supercharger whine.
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Old Mar 13, 2024 | 08:59 PM
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I want one.


not in the cards.
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Old Apr 2, 2024 | 01:04 AM
  #88  
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Yesterday was the day I attempted to fire up the Vette with the Procharger. Now granted, this was just a dry run with no boost going into the motor. .

Things just didn't go as smoothly as I wanted it to. However the main goal was to get her up and running right, inspect the work done and check for leaks and what not. Though, the list of what could go wrong was not as big as I expected.

1. Vette would not idle without help, narrow down to an IAC problem.
2. Oil cooler has a slow leak, gaskets arrived today.
3. Power steering leak.
4. Something going on with the external fuel pump.

Here is the today video so much better than yesterday.


So now it is just a process of elimination. Correct the leaks, go to the back and look over any possible mistakes on the external fuel pump (which I don't think I will find a install issue). But you never know, I'm not perfect.

All out of time today to continue with it. I'm hoping it was just a matter of getting the fuel pressure right since it was running low on fuel pressure. This Vette always ran good at 38 psi.

Tomorrow I'll put the fuse back in to the external pump and go from there.

This motor needs to run right before I can finish the set up and start adding boost.

For now it's not a win/win yet but I am plugging away. I"m happy to get to this point.

I'm working on a full video to push out while I'm laid up from surgery.

Last edited by corvted; Apr 2, 2024 at 01:09 AM.
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Old Nov 2, 2024 | 06:49 PM
  #89  
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Default Finally back on the supercharged corvette. Lets finish this!

Well that surgery suck.

I know it's been a little bit however, I have been a busy beaver here last couple of months. As it stands I'm looking at least a month away from completing the supercharged project. I have to admit this has been the longest project I ever had. Although 2 surgeries didn't help (1 major and the other not so bad just little time to heal 4 freaking months).

Any who, I did get a chance to replace the power steering reservoir with a Canton racing power steering reservoir. Best purchase I ever did. Couldn't find an OEM reservoir new and I didn't want to buy used.




I did push out a video on it that shows what the process on how I installed it from scratch, if your interested.


I also had to chase down the idle issue I thought I fixed and get rid of my engine light.

I replaced the IAC valve which fixed the idle issue.
I also replaced the EGR valve temperature sensor which eliminated the engine light. The EGR valve is new however, I guess I damaged the original EGR temp sensor when I replaced the EGR a while back.
Needless to say, I had to pull the intake off (as you'all know) once again..

Now I'm down to the boost and fuel pressure gauge which is on 1 gauge, the wideband gauge and the MSD 6 boost timing master.



I was going to install the 3 pod holder on the A pillar I had however, one of the gauges would of been out of the line of sight somewhat. All good, now I down to a 2 pod holder with the one gauge being a double guage.
That is what happens when your a tall person I guess..

Already in the process of wiring up all the gauges. Just waiting on a Amazon delivery tomorrow for a harness firewall boot and I can go ahead and mount the gauges which will leave to install the 6BTM, last piece of the puzzle.

Fuel pressure sensor already installed.


Boost sensor already installed.




Wideband sensor already installed.





I am looking for a MSD 8875 wiring harness that MSD does not make anymore. If anyone happens to have one let me know I would like to purchase it from you.

Nevertheless, I'm not going to worry about it if I can't find one. I can do the jumper wiring that MSD recommends however, the harness would be preferably.

Alrighty then, that is my update and more to come soon!

Last edited by corvted; Nov 2, 2024 at 06:55 PM.
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Old Dec 27, 2024 | 01:15 AM
  #90  
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Default Long 2 years

Looks like the installation for the force induction is finally over. That was the hardest 2 years spent that I can remember. Wasn't the install by far but, the f'king surgeries really f'k with me.

Nevertheless, whenever I start a project I get er done regardless of time, well at least in this case. In all honesty, I'm kinda going to miss this because above all else it was fun.

I remember the 1st time I posted regarding an ATI Procharger, hell that was like 2005.That was 19 years ago. Actually, at that time I was also contemplating to do a SC or 383 stroker.

Well, still can't rule out a motor rebuild and I am preparing myself this could happen if the motor doesn't hold up to the SC. I have taken all the precautions so we should be solid however, will see what happens.

So on with a few photos of the completed project:

Driverside



Where I installed the MSD 6AL BTM



Passenger Side



The Glowshift Wideband & the dual gauge Boost/Fuel Pressure


Last but not lease the MSD timing adjustment dial



Unfortunetly, the clamp-on bung for the wideband 02 sensor did not work out for me. I'm dropping the Y pipe this weekend and running it down to an exhaust shop so I can have a bung welded to the pipe instead.

I have fired it up with all the equipment on it and she runs strong and clean.

Other than that, I'll be ready for to kinda start tuning it. I guess it's time for me to learn how to used TunerPro RT so I can get some data logging to help me tune it. Never messed with the TunerPro method but, now is the time to learn how to.

As far as the install it's a wrap. Moving on to the tuning stage..


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Old Dec 27, 2024 | 03:43 PM
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Congratulations!
Looks really good.
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Old Dec 30, 2024 | 01:42 AM
  #92  
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Just binged this whole build. Congratulations it looks phenomenal.
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Old Dec 31, 2024 | 08:47 PM
  #93  
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Thx gents!

Got the Y pipe off which I thought was going to be easy. Could of been but somehow I misplaced a 15mm wrench or it walked off again.

Since I was in the process I just went ahead and unbolted the cat which I was not expecting to do.

Nevertheless, the Y pipe fought me but she finally came lose.

Now the whole reason for pulling it off was due to the way the wideband gauge was acting weird and wasn't reading correctly after start up. It would finally level out however it just took to long too. Once I got a better look at it off the vette I realized what went wrong and it wasn't the fault of the wideband clamp-on bung. My eyes burnt me...

As you can see in the picture that was probably not the best place to install the clamp=on. Ok I'm working from the top and I'm blind I guess.





Here is the gasket that was on the clamp-on bung. I think we found the root of the issue. LOL





Nevertheless, this has been corrected with a bung welded on.



So now that is out of the way I'll reinstall tomorrow morning and I should have a working and cooperating wideband.

My goal was to finish the install by the end of 2024 I'll be off by one day. Really!

Anyway I'm looking forward to finally running this vette on the road and start the tuning stage.

Will keep the post updated as we go along.
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Old Mar 10, 2025 | 12:39 AM
  #94  
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Just an update. I have been having a great time running on this Procharger. Day and night different in power and responsiveness. I got it dial in to the point where I felt was time to get her into dyno to check my work. I know I was close but I wanted to be sure nevertheless.

Prior to dynoing it I started getting into OBD1 diagnostic software to start doing some data logging. I tested out 3 of them Tuner Pro Rt V5, Data Master and WinALDL. I found that each one had something different for my application I could use. So, using all 3 for what they offer the best.

Seem all the data logging I did was going great and all parameters were running as intented and I was ready to dyno. Made an appt and a couple of weeks before the appt doing some data logging and found my BLM’s up in the 140-153 at idle. Did some data logging on the road and BLM was normal under regular driving or WOT along with the AFR’s being normal as well. It was strange since there was nothing I could visibly see wrong. Nevertheless, I kept my appt at the dyno since my BLM were normal at WOT.

Now granted my main goal at the dyno was to ensure a match between my AFR and fuel pressure with the FMU. Unfortunately, my ECM is not the greatest at a 160 baud rate and limited information that it provides. I’m not able to see my knock count nor the amount of timing its doing and that is information I need as part of data logging. I did hit pick and pull and pick up a 86 Corvette ECM recently.

Although, I couldn’t give it a 100% at the dyno It was a still fun and an exciting day seeing that vette on the rack. Each pull increased hp and torque with great improvements. We did about 4 pulls and the tech wanted to keep going by adding more timing. I was reluctant to go pass 2 degrees per pound of boost on the MSD BTM. He ended it at 1.75 lbs. per pound of boast. He understood that I needed to get the ECM issue straighten out then I would be back. I want to be able to data log showing me knock count and timing. Here is one of those run:


About a week later after the dyno the vette finally showed its true colors on why the BLMs are reading lean at idle. The intake manifold gasket blew on the passenger side with antifreeze. Well hell back to the drawing board. Now I’m in the process of pulling all the intake to correct that issue.

Does it suck, oh hell yes! But the bright side I got to run it with the supercharger and now I know all went well with the install and tune.

Got to love our cars to knife you in the back when you least expect it...LOL
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Old Mar 10, 2025 | 04:28 PM
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Congratulations on your first test drive!

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