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Old 01-28-2016, 06:03 AM   #1
Patro46
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Patro's LS Swap Supercharger Build

I've had my eye on a supercharger for my LS3 swap since pretty much the git go, even back when I was deciding on a camshaft for the engine. I must admit, the cam works well in a naturally aspirated state, but I'm curious to see how it works in a boosted state in which it was designed for.

First an foremost, this upgrade is one done on the cheap, and is based upon the ZL1 and CTS-V TVS 1900 series. I've already obtained the improved hat (neat looking piece) and just received the blower drive pulleys in a kit that will allow the supercharger to run directly off the crank. The accessories have their own drive. I've had several bids on the supercharger, but none have came through yet. The Bay has a pretty good revolving assortment of new and used 100's at just about any given time. Just understand most of them will require injectors, fuel rail, harness, sensors, ect. So budget that in as well. Also budget in a solid isolator coupling, as it's this piece that's made TVS 1900's so readily available. About 30 bucks for the solid coupling.
Anyway, this is the game plan. I'll post pictures as the project moves forward.

Last edited by Patro46; 01-29-2016 at 01:34 AM.
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Old 01-28-2016, 06:22 AM   #2
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Old 01-28-2016, 09:42 AM   #3
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What kind of computer work is needed? I assume it won't sense the changes in fuel, air, and manifold pressure and make the corrections automatically?
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Old 01-28-2016, 10:01 AM   #4
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Can't wait to see this. Subscribed!
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1981 Corvette Gen III "LS6" swap, 5 spd. Tremec. Diff done by "tracdogg."
Old 01-28-2016, 10:17 AM   #5
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Can't wait to see this. Subscribed!

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Old 01-28-2016, 11:26 AM   #6
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I've been waiting to see someone do this. No room for this in a c4 c5 or c6 because of the extra pulley required on the crank. do it. please post up pictures of coupler install
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Old 01-28-2016, 06:20 PM   #7
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Awesome!! Very cool. Is the paint dry yet??
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Old 01-28-2016, 08:53 PM   #8
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Cool project, you want be happy until that vette fly's
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My Build Link https://www.digitalcorvettes.com/foru...d.php?t=148376

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Old 01-29-2016, 12:18 AM   #9
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The PCM will still be in control of the supercharger , though we haven't decided whether to to run a 2 or 3 bar maf, or set it up as speed density and do away with the maf altogether.
Even within the LS1'S pcm's environment that was never meant for forced induction BTW, General Motors and HP Tuners seen fit and gave us the ability to create boosted tables and implement them into the tune, giving pcm control over many of the variables your wondering about.
The factory GM pcm really is an amazing piece of hardware with full featured software that can do some pretty amazing stuff (once you break into it). And it's incorporated into every factory GM LSx pcm. HP Tuners through the purchase of credits gives me the ability to change, delete, add just about anything.
Right now, I'm having fun playing with shift points, and am getting close to setting the shift points to work with the 3:73's, both in normal driving and performance modes. We can even increase or decrease line transmission pump pressures in any given gear, and at any rpm or mph with a few clicks of a mouse.
The more I dig into the tune ability of the LSX archetecture, the more amazed I become. I can do with a laptop what took several weekends at the drags to perform, and even that was hit and miss when you factor in a cool day vs a hot one.
Once you set the variables up for your particular car, (tire sizes, gear ratios, ect.) It's time to find a QUALIFIED tuner, and I don't mean some guy that can change the plugs.....
The real magic after all is performed on the dyno, as that gives us the real world facts and figures that we can go back and see what was happening at any given mph or rpm, hp loss and gains, ect., and fine tune the many variables. I still haven't found one I trust to do a thorough tune, but I'm not ready yet anyway.
I'd probably figure 400 to 600 bucks for a good tune including dyno time. Once that is achieved, using HP Tuners and real world conditions, I'll be able to further fine tune maf tables and implement changes pretty much on the fly.

As far as how much control I'll have, Your guess is as good as mine. We'll figure that one out together. I can say this. I don't think the supercharger would have fit under the stock hood. It's going to need the clearance the L88 scoop provides. More than I thought it would for sure.

I'm also planning a boost gauge, and think I found a place that can take my factory clock and convert it WITH proper background as well as the period correft font and make it look like it belonged there all along. Least that's the goal.

So really, once again I'm holding true to being totally anal and wanting a factory look out of the finished product. The journey begins!
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Old 01-29-2016, 01:39 AM   #10
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Awesome!! Very cool. Is the paint dry yet??
ROFL! Probably not, even though it was baked. I've been sitting on my hands the last 11 months with nothing to do, and this supercharger mod is one thing I want completed before this years Power Tour (looks like I might actually make it this year). Yay!
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Old 01-29-2016, 10:33 AM   #11
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Patro, a couple years back I had a '04 GTO that i messed around with. First thing I did was a Trickflow 515 hp top end kit. It worked well but I got bored real quick so I put a Procharger system on it. My tuner guy...(I know nothing about tuning these computerized cars) he explained to me that he put in a 2 Bar MAP and edited out the MAF, but left the MAF in and connected. The stock ECM was used. Everything worked well even with the wild non blower cam. 586 rwhp / 477 ft. lbs. Stock bottom end. That LS1 was surpassingly tough.

All this talk of supercharger their LS powered C3'S Is really making me anxious to get a Maggie on my '81 vette.
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1981 Corvette Gen III "LS6" swap, 5 spd. Tremec. Diff done by "tracdogg."
Old 01-29-2016, 10:41 AM   #12
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Quote:
Originally Posted by Patro46 View Post
ROFL! Probably not, even though it was baked. I've been sitting on my hands the last 11 months with nothing to do, and this supercharger mod is one thing I want completed before this years Power Tour (looks like I might actually make it this year). Yay!
Power Tour? I'll look for you car. I plan on doing the whole thing.

BTW, I had to notch and box in the front cross member so my blower pulley would fit on the crank (1973 vette)
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Old 01-29-2016, 05:30 PM   #13
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Quote:
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Patro, a couple years back I had a '04 GTO that i messed around with. First thing I did was a Trickflow 515 hp top end kit. It worked well but I got bored real quick so I put a Procharger system on it. My tuner guy...(I know nothing about tuning these computerized cars) he explained to me that he put in a 2 Bar MAP and edited out the MAF, but left the MAF in and connected. The stock ECM was used. Everything worked well even with the wild non blower cam. 586 rwhp / 477 ft. lbs. Stock bottom end. That LS1 was surpassingly tough.

All this talk of supercharger their LS powered C3'S Is really making me anxious to get a Maggie on my '81 vette.
Quote:
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Quote:
Originally Posted by Patro46 View Post
ROFL! Probably not, even though it was baked. I've been sitting on my hands the last 11 months with nothing to do, and this supercharger mod is one thing I want completed before this years Power Tour (looks like I might actually make it this year). Yay!
Power Tour? I'll look for you car. I plan on doing the whole thing.

BTW, I had to notch and box in the front cross member so my blower pulley would fit on the crank (1973 vette)
Quote:
Originally Posted by BlowAMouse View Post
Quote:
Originally Posted by Patro46 View Post
ROFL! Probably not, even though it was baked. I've been sitting on my hands the last 11 months with nothing to do, and this supercharger mod is one thing I want completed before this years Power Tour (looks like I might actually make it this year). Yay!
Power Tour? I'll look for you car. I plan on doing the whole thing.

BTW, I had to notch and box in the front cross member so my blower pulley would fit on the crank (1973 vette)
Quote:
Originally Posted by BlowAMouse View Post
Quote:
Originally Posted by Patro46 View Post
ROFL! Probably not, even though it was baked. I've been sitting on my hands the last 11 months with nothing to do, and this supercharger mod is one thing I want completed before this years Power Tour (looks like I might actually make it this year). Yay!
Power Tour? I'll look for you car. I plan on doing the whole thing.

BTW, I had to notch and box in the front cross member so my blower pulley would fit on the crank (1973 vette)
I was enjoying your comment, thinking how that extra buck twenty at the rear wheels is gonna feel then I came to the the part where you had to knock the frame. All those euphoric thoughts just came crashing down to reality. I'm sure hoping no frame work is involved.
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Old 01-29-2016, 05:41 PM   #14
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Yesterday afternoon the new improved ZL1 supercharger top hat came in, and did so nicely equipped. The improved intercooler now has the inlet and outlet in the front of the hat. It even came with what looks like map sensors (two of them) and another that looks like an air temp sensor.
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Old 01-29-2016, 06:09 PM   #15
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Along with the supercharger arriving, I received the supercharger drive pulley kit. I really had to do some comparative research, as I've already invested in Holley's drive belt relocation kit, moving the alternator and the ac compressor up high. I also did not want the supercharger driven off anything other than the crankshaft. I also wanted an 8 rib drive and not a 6.

The kit I found allows just that but requires removal of the water pump and installing a ZL1 water pump.

The Holley drive brackets I have already installed will have to be converted from Fbody spacing to Corvette belt spacingl, and the ac compressor mount will have to replaced with their own to function with the blower drive setup due to idler location. I am able to keep the Holley high mount alternator and power steering pump bracketry. This kit allows the supercharger to be driven directly off the crankshaft with only one belt tensioner.
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