One of the most common questions in the 3800 market is "Can I bolt a GTP supercharger onto my GT (L36) engine. The short answer is no. The only things the non supercharged and supercharged 3800's have in common are the block and crank. Everything else is different. Still a few determined individuals have done it. This is the list of components you used to need: L67 idler pulleys, L67 idler stand off, L67 throttle body, L67 injectors, custom PCM, GTP balancer, L67 MAP sensor, L67 heads, L67 fuel rail, 2 head gaskets, head studs, MAP adaptor harness, bypass valve wiring, vacuum lines, brake booster line, supercharger gasket, throttle body gasket, lower intake gasket, lower intake Orings, supercharger belt, GTP valve covers, GTP valve cover gaskets, coil pack bracket for 99+ cars, M90 from an L67, lower intake from an L67, M90 bolts, and new rocker bolts. You'll also need a torque wrench, 3800 balancer pulley, and very powerful airgun to remove the crank bolt.
The new ZZP L36 SS M90 kit allows you to bolt a GM Gen 3 Eaton M90 supercharger to your Series 2 3800 non-supercharged engine with out the need for all the traditional components and without the extensive labor or special tools. The SS kit also allows you to run boost more efficiently on the high compression engine because of the blower port work matched with a machined intake manifold. You'll have room for easy upgrades with the SS kit as well because it uses a modular pulley system.
Included in the base package:
- Garlock supercharger gasket
- Instructions on paper and CD
- L67 brake booster vacuum line
- Idler pulley with custom standoff, bolt and washer
- Throttle body gasket
- Accessory belt (95.5" for '99+ with 3.8-4.2" pulley)
- Autolite 103 plugs
- Supercharger oil
- Supercharger bolts
- PCM reprogramming
We expect the SS L36 M90 kit to be one of the most popular items ZZPerformance has ever offered. Because of the large number of differences from kit to kit which vary by car model as well as year we DO NOT accept phone orders and WILL NOT be giving sales support over the phone. Please email all questions to customerservice@zzperformance.com or post on ClubGP.com in the L36 message forum.
To make a complete kit you will need 4 items from us as well as the basic install package found on this page.
- Intake manifold. Your L36 intake manifold will be replaced by our modified L67 manifold found here: http://www.zzperformance.com/grand_prix/products1.php?id=235 In your L36 engine the injectors fire into the intake manifold. In an L67 the injectors fire into the heads. The L36 engine in your car has different heads than a GTP which is why you need our modified intake. Add this intake to your cart choosing the drop down menu to select the SS L36 option. We recommend adding the intake gasket option unless your car is new enough to reuse the stock one. You will have to pay core charge on the intake unless you find a GTP intake and send it in first.
- Fuel logs. The stock L36 fuel rails will no longer work. The L67 rail will not work either because it is meant to locate the injectors in the heads which can't be done on your engine. Go to our fuel log page: http://www.zzperformance.com/grand_prix/products1.php?id=259 and add them to your cart. Use the drop down menu to select L36 SS rails. Upgrading injectors on 00+ vehicles requires new injector retaining clips and injector connectors. OR you can run our Multec 2 34# injectors which will work with your factory connectors. http://www.zzperformance.com/grand_prix/products1.php?id=1178&catid=113
- Modified M90. The Stock M90 blower housing needs to be modified in a number of places. The fuel rails now sit so close to the blower that it must be clearanced for fitment. This work is done in the CNC mill and we run the file for our blower outlet work at the same time. As part of our outlet work we move the outlet forward so our intake will be machined to accommodate this. The modified blower is more efficient than a stock blower helping to keep KR to a minimum while running boost to a higher compression engine. Order your blower here: http://www.zzperformance.com/grand_prix/products1.php?id=162 and use the drop down menu to select the SS L36 version. You will have to pay core charge on the supercharger unless you have an M90 to send in.
- Custom pulley. The M90 in the SS kit uses the accessory belt to drive the blower. The pulley needs a custom offset to work like this. Order your pulley system here: http://www.zzperformance.com/grand_prix/products1.php?id=205 and choose an SS pulley for use with your kit. The stock injectors on an L36 will not support pulleys smaller than 4.2”. The 4.2” pulley will give 4 to 5 pounds of boost depending on what other modifications have been performed on your vehicle. To use standard pulleys on the SS kit you would have to install a GTP balancer and all of the accessory pulleys from a GTP.
FAQ
1. How long does this kit take to install?
Complete install takes 2-6 hours if doing it for your first time. You will need metric and american socket sets. SS M90 instructions
2. What cars will this work on?
Most FWD Series 2 3800 with an L36. We've tested on Grand Prix, Impala, Bonneville and Monte Carlo. Gen 5 kits will be available shortly for use with drive by wire throttle bodies and newer cars.
3. Won't I have KR? Will my engine blow up?
The kit comes shipped with a very large pulley, cold spark plugs, reprogrammed PCM and a ported blower. It will make just under 5 pounds of boost. As long as you run premium gas your car will be ok.
4. What mods can I use with this kit?
Any mods that you would normally use for a Series 2 3800. The HV insert will not work.
5. What throttle bodies can I run?
The kit is setup to use a GT throttle body. A stock throttle body or ZZP L36 stage 1 works best. If you want to use a GTP throttle body you can, but PCM programming or an AFC will be required.
6. What cam should I or can I run?
Our GT line of cams will work but we recommend our VS or XP cam for optimal performance. With GTP injectors and our VS cam we recommend our 3.5" SS pulley. With GTP injectors and our XP cam our 3.25" SS works well.
7. What do I have to do to run more boost?
You'll need larger injectors and PCM tuning. For older cars, 33 or 42 pound injectors work well. for 01+ cars with GM mini connector, our 34# injectors are best.
8. Will my car run any different?
No. It will idle the same and get the same fuel economy it did before installation of the kit.
9. What will the gains be?
On a stock L36 look for gains of 60+HP and 60+ ft/lbs of torque. If your GT is modified the gains will be larger. Because of the higher compression and longer rods the L36 will make 5% more HP and torque than an L67 with the same amount of boost. Gains at the track will typically be 1/2 to a full second from where you currently are. Traction and whether you run race gas or torco will greatly affect times. Click here for typical before and after dyno .
10. Do I need any other parts?
You will need to do an oil change BEFORE you start the car and add some coolant. The kits was based on a 97/98 Grand Prix. If you have another vehicle, there may be other parts you need. Other than that kits are shipped complete.
Cast iron coil pack bracket and ignition module adaptor plate required on:
99 and newer Grand Prix
00 and newer Monte Carlo
Please select the proper injectors for your connector type so you don't have to cut and splice in the wires.
Most 01+ vehicles have a GM mini (multec 2) connector. You can buy 34# injectors with this connection type on our site in the fuel section.
11. Will I get belt slip?
No. The kit has been tested down to a 3.2" pulley with 12 pounds of boost with the accessory belt being the only drive. ZZPerformance modular pulleys grip better than anything on the market thanks to their norrowed V-groove angle. The included idler pulley increases belt wrap for better grip.
12. Will my PCM work with this kit?
Your PCM will need to have PE AF ratio lowered by 2.0, timing lowered by 8 deg, PE TPS lowered to 35%, and converter lockup raised by 10mph on all settings that aren't at 255. This holds true for stock or aftermarket PCMs.
The PCMs that come in the L36's are quite aggressive for a boosted application. You can email us your .bin file if you have a power tuner or send in your computer, or order one from us if you need to. Pricing does not include PCM cores, or upgrades to your PCM other than what is listed. Those changes cost extra.
If you want us to send you a stock PCM with the changes for the SS kit made, you can select so with the drop down menu. Then we will refund you $100 or the $110 when you return your factory PCM.
13. Can I run an intercooler with this kit?
Yes. Our SS intercoolers have injector boss clearance and work with this kit. Our full size stage 2 and 3 intercoolers will not work. Since you already will have ZZP fuel rails, all you need is the intercooler.
14. Can I run GTP injectors?
The GTP injectors will physically fit but you will need PCM calibration. Using the AFC is not an option because you would have to scale the MAF too far. Scaling the MAF too far causes the PCM to miscalculate engine load and lower transmission line pressure. This will cause irratic shifting and premature transmission failure. If ordering injectors at the same time as this kit, we can program them into your PCM for you. Newer cars have a different style injector and need injector connectors.
15. Will my transmission hold up?
The internals of the non-HD transmission are nearly identical to the HD version. The differential is weaker but that is only stressed during launching. Any modification that increases horsepower will increase the stress on transmission components but the stock transmission is fine to around 300 crank HP. The life of your transmission will be affected more by how you drive than by the installation of this kit.
16. How much do you charge to install?
$250-$300 depending on the car.
17. What airbox & intake will work with this kit?
The same intake setup you have now will work.
18. Will my engine hold up to a supercharger?
In stock form the L36 makes 200 HP. We have tested numerous stock L36 engines to over 500 HP without failure. Yes, it will hold up.
19. Do I need a pulley puller tool?
No. The blower will come with the modular hub pressed on the snout. Pulley changed will only require an allen tool.
20. Has anyone installed this kit yet?
Yes, we have installed a few on test cars and shipped many kits. Daniel Schmidt is a customer currenty running 12's with it and very famiar with it's installation. He can be emailed at: Courtesy_automotive_service@msn.com (has lower case lines inbetween each word)
The last customer to dyno (Josh in MI) made over 250WHP with a 4.0" pulley!
Click here for results on a Regal.
275WHP http://videos.streetfire.net/video/2001-grand-prix-GT-DYNP_208097.htm Mods are ZZP m90 KIT. headers. 1.9 rockers, 3.6 pulley
Nick Perri ran 13.1@103 on 93 octane with a 3.4" pulley. His full build can be found in our member's car section.
21. Do I have to upgrade my fuel system?
The stock fuel pump is good down to a 3.5" pulley. To run a 3.25" you'll need the fuel pump rewire.
22. What if I change my mind after buying some of the kit?
The design of this product allows people to slowly buy components of the kit. We have done everything we can to design a kit that is extremely cost effective and versatile. In order to keep costs low we cannot accept any returns on any shipped components of this kit unless you pay a 25% restocking fee. Please be aware of this and do not purchase any part the SS M90 kit if this has any potential of being an issue for you.
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