Okay, I have never really looked into the tuning side of life on the Cavalier, mainly what there is out there for it.
I have been reading up on the different systems, and still have no idea what is available.
So far I understand (correct me if I am wrong) that the 2000+ years have a different fuel control (TPS and RPM).
Therefore eliminating the usefulness of the Apexi SAFC I, II, or Neo.
I think that I am reading that the E-Manage is good to go for -/+ fuel and timing.
The HPT system is the best... but really puts a hole in the pocket (650.00 for everything? - wideband?).
Is there any thing that needs to be purchased for tuning other than a wideband O2?
Is there any other tuning systems out there?
How much boost can a stock 2200 handle? RPMs?
Can I re-flash the PCM for boost (I think that was just the 2000 year though) with the HPT?
What size injectors should I be using for what amount of boost?

So, as you can see, I have never thought about tuning this car until two days ago when the wife bought a Turbo kit for it. Help!

Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

Well first off, what turbo kit did you buy??

By knowing the turbo kit, you can get a HP range, and get some properly sized injectors.

To be honest with you, high boost, I would recomend a full stand alone. And for high boost, I would also recomend some upgraded internals. There are members on here running a very high boost level for a stock bottom end, but I attribute thier succsess to thier tuning capabilities, which by your questions, dont think you have at this point.

If you dont want full stand alone, or need to keep your car obd2 compliant (like me) then HPT is your best bet. I would recomend MORE metering than just a wideband, but a wideband is necessary. EGT, oil pressure, boost, etc, are all things you should be monitoring, with EGT being the least used of those. There is another similar platform to HPT, but I do not know anyone using it, and if I recall was about $100 more.

But you need to figure out your end goals, and we could get you better information.

Well, it is a 60 trim... the wife loves boost, but does not understand that the stock engine can not take that abuse. I figured that I could run it at waste gate pressure (7-9psi) for a little more umph. I currently have installed a oil pressure gauge and after market sensor, boost gauge, A/F gauge (narrow band), and a Apexi Auto timer. I do not plan on giving the wife a full engine rebuild and turbo, so I guess my goal would be around 180tq (whatever is safe for stock internals, do you know?).

With all of this being said, I am not new to tuning, just new to this platform under boost. I have a 3000GT VR-4 with twin Evo III 16Gs on it (running AEM EMS and AEM sensors with a home tune). I just need to know what you all know or to be pointed in the right direction for this platform.

So far, thank you... I guess that the HPT is going to be the best bet for tuning (boosted no more than 2bar right)? Just hook my innovative LC-1 wideband into the HPT along with the oil pressure signal wire. What other sensors would I need (my mitsu have air velocity and temp to replace the mas, what does the cavy have)?

Let me know if this seems right, if not then tell me what I need. I am not afraid to research, just need to know what to look for.


Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

Oh, yeah, I do need to keep the OBDII for state inspections, along with the Check engine light staying off.

And another thing, what does the darn Service light that looks like a wrench mean?


Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

The service light is usually saying you have a headlight out, or you have a problem with your DRL.

I think plugging in your oil pressure to HPT is a little over kill, but wideband, EGT, engine bay temp...some things like that will be useful.

If you need to stay OBD compliant, than HPT is going to be the way to go for you. Tuning it will be very different than tuning your 3000. I would get more familiar with the alpha n tuning, and start researching the various tuning help for this vehicle. Shifted has written some excellent write ups on tuning these cars for boost, most of which can be linked to from the sticky at the top of the tuning page.

You SHOULD be safe running 7-9 lbs. but as stated earlier, it will all depend on the tune. Bottom end should be able to hold together fine with the numbers you are searching for. Limitations in HP have been discussed before, somewhere in the 300 HP range, but I would not go near there on them (although the crank should be fine well over that....).

There have been some rather successful fake 2-bar tunes for the car using HPT, and some people continue to use the stock 1 bar. There is a problem with lost resolution by faking these higher pressure map sensors, which without a custom operating system, can not be overcome without a stand alone EMS. There is also the option to flash a GM supercharged file from a supercharged 2.4 cavalier onto your 2200, some people have also been succesful in that, and that converts the car over to speed density, and able to read a 2 (or perhaps 2.5) bar sensor.

Well THats the route Im going. I would get the 2.5 bar but from what I have read there is a tmap. but I cant find me one.


DRIVE HARD OR DONT DRIVE AT ALL!!!

CAVI.DEMON wrote:Well THats the route Im going. I would get the 2.5 bar but from what I have read there is a tmap. but I cant find me one.

You can get them out of Redline/Cobalt SS.. I think I may have one laying around.



P&P Tuning
420.5whp / 359.8wtq

damm u beat me to it.

yeah, thats where u get them.

Who all has done this route, and with what success??

What all has to be done to use the reflash. I thought I read you have to disable vats. Is there anyhing else? I kno about the tuning part but I mean being able to turn the key and it try to start.


DRIVE HARD OR DONT DRIVE AT ALL!!!

Wouldnt know from expirience.....so, try it and let us know

CAVI.DEMON wrote:What all has to be done to use the reflash. I thought I read you have to disable vats. Is there anyhing else? I kno about the tuning part but I mean being able to turn the key and it try to start.

Reflash a SC reflash by doing a WRITE ENTIRE. When that completes you need to change the VIN to the correct VIN. I did not do the VATS disable ( I have bypass modules for remote starts on mine). Before it will run properly, you must change the values for multiple tables as the 2 different engines use different values. Keep in mind when writing this new tune you kind of need to think as if you were writing a fake 2 bar to get the values correct. Do not try to copy and paste the entire tables as this will give you undesirable results... Also make sure you put the 2 bar MAP in too... I have not done this with the 2.5 TMAP, but with a lil bit of rescaling I do not see why it would not work...



P&P Tuning
420.5whp / 359.8wtq

Can anyone confirm these part numbers for the sensor and the conector sensor- 90423637. conector- 88988320. and that the ss and redline are actually 2.5bar. because I have read on some other forums that there only 2 bar.




DRIVE HARD OR DONT DRIVE AT ALL!!!

Okay, so HPT with a SC re flash if I can do it. What about this 2bar sensor, where can I get them? How much? What boost would I be safe with on the stock injectors?


Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

You can use the 2 bar up to 14.7psi. You can get them on ebay for like 50 or 60 shipped. no boost is safe on stock injectors. upgrade them before boosting.


DRIVE HARD OR DONT DRIVE AT ALL!!!

What injector size is recommended for up to 2bar max? Can I use the old 2bar map that was on my VR-4?


Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

2 bars is 2 bars....you will probably need the pigtail and solder it in....

I would recomend maybe some 310's, something along those lines.....perhaps from a cobalt ss.

Ford green tops are another popular option, but I dont know off hand what size they are...

This is frekin awesome. Here is my list then:
HPT Pro
Mitsubishi 2Bar MAPS
Cobalt SS Injectors or 310cc+?
LC-1 Innovative Wideband O2
Current Oil Pressure Sending Unit
EGT Sensor (which one do most people use)


Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

hpt pro
GM 2bar map
310cc injectors- green tops=440cc
wideband
oil pressure sending unit
egt sensor. I have an autometer

depending on what size turbo and how much boost you plan to run will tell you how big of injectors to get. but remember you have stock bottom end. I ran 15psi for a year on a small t3 and the ringland went on 20psi. but the same psi on a t3/t4 is much greater power figure.


DRIVE HARD OR DONT DRIVE AT ALL!!!

So will mitsu injectors work on the cavy? Is the cavy low or high imp? I think that the Mitsu's are low. Do I have to use a GM 2bar Map?


Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

MOST cavs are high impedance. I wouldnt just throw mitsu injectors on....but if they are the correct length and style....why not. As long as the MAP sensor you are using is a 5v sensor....you are fine.

Okay, Cavy injectors should be high imp, but mitsu TT injectors are low imp. I will have to put a resistor into each line for the injectors. The difference is 6 ohms of resistance. sounds easy huh?

Is there a place that I can get remaned injectors and a map sensor from?

Does anyone know where to get a down pipe from? Flange to under the engine for a t3?


Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

I suppose you could do the resistor thing....I wouldnt recomend it....but it can be done that way. I see 310's for sale on here all the time in the classifieds. As far as reman....I dont think anyone remans map sensors, and for the price, you can get new injectors. I would look in the classifieds here, check out your local yards for things too.

DP, no one makes one due to the multiple manis out there. You are going to have to buy a flange and have one made.

If you cont have a mani yet, I would recomend checking out the GP in the Group purchase forum for the RD Fabs mani, and choose the option to get a DP at the same time.

Direct replacement for a 2 BAR MAP is part# 12580698 .. You can get from Gm Parts Direct for $45.81 . You may need to cut the mounting tab off the right side of it, but not a big deal.



P&P Tuning
420.5whp / 359.8wtq

You guys are awesome. So having the 2bar map on the car with the hpt system will give me good resolution if I can load up the supercharged settings. What is 310 good for? I was thinking 440s, that would be more than enough right? Plus I would have room to grow.

I have the log mani for the t3/td04e. needed something short that would allow the turbo to fit. do you think that 80 bucks for a down pipe fab is good?


Mike OUT
01' Chevrolet Cavalier (241fwhp@14psi on Pump 93
40mpg): 2200 Toyota Engine (No internal work), 5 Speed w 350ft
lb Trq Clutch, T3/T4 Log Mani w T3/T04E T31, Ford Mustang GT 30lb
injectors, Cobalt SS 2bar MAP, LC-1 WB, HP Tuners all the way!, WW
Lip Kit, Z24 Wing, 17in Rims & Tires (8in wide), KYB 2 Adj Struts
w KSport Lowering Springs, 2 & 1/2in to 2 & 3/4in Custom Exhaust,
Magnaflow 3in Muffler Tip Combo , BMW Silver, Short Shifter, ect...

you should be good using the 2 bar sensor with the supercharger reflash (tuned for your car).

440's will be more than enough for anything you will be doing on a stock bottom end.....310's would cover your goals for now.

DP, depends on what it is made out of.....materials are very expensive right now, so $80 doesnt seem bad at all, I would not expect to see a very good DP for that price though. I assume thats carbon steel, probably not mandrel bent....somewhere in the 2.5" range??