Guys I have a 2000 coupe. I just bought a ls6 intake with the fuel rails and the Mat sensor off a 2003 z06. Can I use the current Mat sensor on my car with the ls6 intake. If i change the sensor what part(s) will I need for the switch. Thanks for any info

 

you dont need anything but the intake. everything else of off your 00 will transfer over.

make sure that you use your oem injectors as well. it wont run right if you do not.

by the way, what is a MAT sensor?

 

I think he meant MAF sensor.... prob a typo? Not very far from F to T on the keyboard. And of course, I never make missnakes.

 

 

He could have meant to say (MAP) Manifold Absolute Pressure sensor. and it looks like this:

 

If it is the MAP sensor, you can use the one that came on the new manifold.

BC

 

the P is much farther away from the T

 

From my tinkering on a TPI 350 in a Z-28 that MAT would be "Manifold Air Temperature". Even though the sensor is in the upper plenum. However I'm thinking MAP also even though it's a long trip between "T" and "P" on the keyboard.

 

Do you mean he shouldn't use the injectors that came with the new manifold? What if they are oem? Just wondering because I used the late model injectors on my 99 and it likes them.

 

Different year C5 use different size OEM injectors. Your PCM is TUNED for a specific size injector, even if there OEM,, and you use the BIGGER or SMALLER OEM injector it will not run correctly or efficiently.

If there the same part number, your good to go.

BC

 

Your car is tuned for 26# injectors, I believe if you replace them with 28# injectors you will have operational issues. I would talk to a tuner before crossing this bridge.

 

Thinking about an intake change like the forum member is doing as one of the modifications I will be doing to my 20,000 mile 98 c5 trying to get the flywheel hp up to 430+ without a cam or head change and no I can't afford a turbo or supercharger. Plans include a Volant duel cone cai system, long tube headers, x-pipe and over the axle pipes and mufflers, throttle body port and a tune up. With the afore mentioned changes what do you estimate my hp would be? What kind of performance can I expect on Paradise Dragstrip a 1/8 mile track with an automatic transmission and the 3:15 rear gear?

Garrell Patterson

 

Interesting. They are different part numbers. I went from smaller to bigger. A couple years later its still running fine.

 

That dual cone will prob cost you HP,get a Vararam.The headers and other exhaust mods with a dyno tune may net you 30-40 hp if you are lucky.So you may end up with about 330 rwhp.

 

The 2.8lb difference from 26 to 28.8 probably isnt enough to have a 'major' negative effect on performance, but the calibration in the pcm is different for the two different injector sizes. Your pcm is commanding the 28.8lb injectors thinking they are 26lb injectors essentially commanding incorrect fueling. Injector on/off times will not be accurate.

I hope Im not misrepresenting this, but consider this.. the 28.8 flow about 10% more fuel at the same fuel pressure. When the tune isnt changed to account for different injector sizing, when the pcm tells the injectors to open for 1 second, you'll get 10% more fuel during that 1 second the injector is open but I suspect your fuel trims can probably adjust enough for the discrepancy.

In my case, Im running 50lb injectors which flows 74% more fuel than the 28.8lb injectors. There's no way I can get away with not correcting the injector calibrations.

 

Exactly what I was going to post. If you examine your Long Term Fuel Trims,, I bet that they are high.
High LTFTs make WOT runs rich and closed loop cruising less efficient. What is your average highway fuel mileage at normal sane person cruising??

Bill

 

It's obvious that I am in the presence of genious and no I am not being scarcastic. I am in my second year of recovery from a serious heart attack followed within a month by three strokes. In addition to being in a wheelchair for almost two years and not being able to take care of myself I also suffered 100% memory loss. I was not supposed to ever get any better my Doctors told my wife. I moved to a walker through doing my own therapy exercizes that I developed myself. I now use my hot rod walking stick which will be my companion forever due to Parkinson's Desease and Rheumatoid Arthritis. Don't feel sory for me, because of being a lifelong gearhead I pushed and drove myself and last Oct. at the Maxton Mile in N.C. I set a landspeed record in my SS Silverado truck in C/ Production Pickup. I had a cai, flowmaster exhaust, Hypertech MaxEnergy tuner, tonno cover, and 48 lbs. of air in each 20" tire and ran 127.99 mph in a 5600 lb. truck.
Last weekend at the inaugaral Ohio Mile I set a landspeed record in C/PP and B/PP and ran a best speed of 132.279 and 133.894. I was fortunate enough because I am a chronic insomniac to make the first run down the track in a maxed out field. The event was covered by Hot Rod Magazine who was sponsoring the Top Speed challenge and they were all around my truck shooting pictures , I don't know if my truck wil be in the coverage issue or not but that would be kind of cool.
Anyway back to the subject I got more serious before going to Ohio and carried my truck to an excellant LS tune shop that I checked out thouroughly. They have their own dynos, build their own turbos including fabing and soldering the piping and grind their own cams. I had 1:8 to 1 full roller rockers, beehive valve springs, .100 wall thickness pushrods for preventative measures, ported the throttle body, Dougs Headers remote controll cutouts and a dyno tuneup. I could have left most of this out but what I wanted to say was that on the dyno I gained 32 hp just in the tuneup! I am old school, I was probably racing Corvettes before most of you were born. I would like to get my C5 to 425+ flywheel hp. I am still learning something new everyday, but I figured the Volant cold air kit was probably worth 12 hp, and long tube headers with cat back x-pipe another 25 and maybe the tuneup another 30. That is the reason I am looking for another 20 to 30 hp maybe in an intake change. Do any of you have any experience with the BBK intake, they claim 25 hp I think and you see them for $499.00 to $599.00
I promise I wil not go this long the next time, oh yeah I owned a fuel injected Corvette fourty years ago without a single wire connected to it but it did have a split rear window!

Garrell

 

Garrell

The first 25-30 hp increase in an LS engine is EASY.... The next 25-30 hp gets harder and after that, it takes much more cash and missing hair.

As you go up in the HP curve,, things like heads and the cam become the restriction.

Once you pass the 400 RWHP mark,, things in the drive train start to need help.

I am at the 450 RWHP mark. I used a home ported FAST 90, ported 90mm TB. patriot stage II heads and a 240/240, 610 lift 114+4 whiplash cam, 42lb/hr inj, stainless-works headers and a tune.

Bill

 

Oh,,, forgot,, Spec Dual disk clutch, better tranny, hardened rearend..

Bill

 

I am very aware that dollars equal horse power. I may not have made my self clear, I know when you install the exhaust system, cai. intake, tuneup etc. the horsepower is measured, if that is the correct wording, at the rear wheels. But I am looking at increasing the flywheel hp to around 425+. I think the loss at the rear wheels with an automatic transmision is around 15%, is that about right. The 62 hp that I gained in my truck in preparation to race at Ohio last weekend cost a lot more than the work I had done last year. I do know that a head/cam change is very expensive. I thought about trading for an 02 to 05 low mile Z06, but I know my car and how it has been cared for so I decided to improve the performance and handling in stages. How difficult is a rear gear swap in the C5 cars and again what about the BBK intake? Am I way off to expect 75 to 90 flywheel hp increase with: long tube headers, x-pipe and mufflers, throttle body porting, cai, possibly the BBK intake and tune up? The cost for the labor in the area where I live is probably less than for a lot of you, $500.00 for the tune up and $100.00 for the dyno time.
Garrell