i don't know half of the crap twincharged talks about, because it's way over my head but....

i thought he explained the extra injector advantage pretty clearly.

tht was what i was curious about. i know the pulley will have to be swapped back, but i didn't want to be uninstalling the electronics, fuel rail and pulley just for some work to be done

 

Steve Lockett is doing some of the tuning and some development with RevIt Up. More or less I am referring to the knowledge base within the company.

 

Ahhh good enough I think he has one of the fastest first gens in the stock chassis racing class iirc. Good stuff to know anyway. O yeah you asked about the advantage of the staged kits. Should eliminate the computer pulling boost (wont have to fool it anymore) and an increased redline with fuel tables already programmed in.

Dan

 

Rehash: Why the extra injectors are the best bet:
1 the car retains all fatory load references so fuel trim and ingition remains the same
2 more fuel than you will ever need with the factory blower and only when you need it
3 drivability because you do not have to modify the fatory loads to compensate for larger injectors
4 the factory fuel system functions at it's most efficient presssure which is factory.
5 extra intake manifold runner length.
6 simple solution that works.

 

If I really wanted to I can raise the rev limiter to the sky, but the valve springs aren't up to the task. Also the fueling at the end of the RPM scale is not an issue what so ever with the fueler plate.

 

so do yall plan to raise the limiter? i would love to be able to turn to 7k...i keep slapping the hell out of 1st and 2nd...

 

This is going to be the last time I post on this thread, because it is getting out of hand, but the car is very touchy about the voltages, and the sensor that is being tricked by the MAF translator is pulling back so much fuel to copmensate for the bigger injectors that the car thinks it is decelorating and it throws over 25 degrees of timing at the car, which is what has been causing that phantom knock at around 3k. I hope you have found a way to smooth it out.

As far as the revitup kit, we have had it on the dyno, datalogged the car on the dyno and the street, changed back and forth between pullies and tunes to check all the variables, and we have found that it works.

To the guys telling us that the car is leaning out at 12.7:1 at the top of the RPM band, go back and read up on your tuning charts. There are different acceptable ranges for NA, superchargers, and turbo's., and we are within that acceptable range, so how is that wrong?

Lets move foward, and see what else we can do.

 

I couldn't agree more!


Just a little FYI, under WOT, i'm skewing the MAFF 14% lean. I see about 19-20degrees timing MAX which sucks because i want 24deg all the time!

Personally, I HATE messing with the maff tables because they are the base that all the other parameters go from, just as you stated. In my Impala, i tuned with the IFR table to dial in my AFR to optimum for my combo. (key phrase ) Didn't like messing w/the maff because it also affected the trans shifting as well. Sometimes though you have to make things work. Not pefect but it does function.

Your method will work, is it the best yes/no, as it depends on the intended application and goals and abilities from the customer. If we all made the same product, the customer would suffer. This way, they will all have multiple choices as all will work to a common goal of making more power!


As for your ealier comment on my typing, yes, i suck! My mind goes about 1000mph faster than my lame a$$ typing skills. I'm a technicin, not a typist!

 

Stupid voice of reason


Let me re-cap here,

You guys fooling sensors is ok but another vendor it isn't, Check! Yes because our tuning device has 3 dimenional tuning via TPS/MAP/RPM and can modify several sensors(O2 sensors, Maf,map and AIT)Yes because our tuning device has 3 dimenional tuning via TPS/MAP/RPM and can modify several sensors(O2 sensors, Maf,map and AIT)

Adding a fuel rail, 4 more injectors, all the wiring and modiles and making it works better and more simple than just adding 4 bigger injectors and a properly tuned pcm, CHECK! #1 you arent tuning the factory ECU #2 our way keeps all part throttle fuel trims in check the only mods are done at full load.


You admit the car is leaning out at higher rpm's but thats ok, check! The car runs up to 12.6/1 air fuel at the top end totally acceptable for this boost/ignition/RPM

You know what you are doing because you have made totally unrelated 4 cyl cars fast but i don't know what i'm doing because i've worked only on v6 and v8 cars, Check! As was said previous the shop employees and associates have a total of 4 ecotec cars(3 LSJ's and a 2.4 LE5), Our knowledge and experience is obviously good enough as we were a recommended engine management specialist in the build book and we tuned a GM Motorsports turbo ecotec for SEMA.

Good luck! We all need it!


In the end I don't see anyone posting on this forum or any other of any issues with the final version of the RevItUp STG1, but I do see it about others. In fact many PM me asking for info to help their issues. I have been there and I seen alot of the issues they are running into by having the wrong load value at the wrong time.

 

Yup, and in the hotter temps, IAT's are higher, the air entering the engine is hotter, and there is much more risk of detonation, but you knew that right? Also, depending on your timing table (since added timing creates heat), you could need more fuel to overcome kr. But since we have plenty of room on the stock system for a 2.8" pulley, we'll never have to worry about kr of fuel no matter what the weather like, isn't that right?

 

My goal is to eliminate this MYTH of running a 2.8" pulley on a stock fuel system. You talk about how good you are, and all the stuff you've done, I think you even mention tuning a Turbo car for GM? So are you BETTER than GM? Because even GM uses bigger injectors just to go to a 3.1" pulley. Wow, look at that, even GM uses bigger injectors and then tunes them in! Man, you must know more than GM, because otherwise they'd be using a fuel rail with secondary injectors! So again, if you're ways are proven, and they're better and more efficient, why does a multi-billion dollar company tune in bigger injectors on anything smaller than the stock pulley, but you say you don't have to, since the stock fuel system can run a 2.8" pulley?!

 

Aren't you the guy that has a twincharged LSJ that was supposedly beating Z06's? What happend to that? Where's the track times on that? Surely there's been a track somewhere near you open since you've had that? You post all of these accomplishments on all of these other cars, but no LSJ's? Also, you stated that you are posting for yourself, not for a company IE: Revitup-BUT YET, YOU'RE POSTING THEIR ACCOMPLISHMENTS? Please help me understand this hypocrite game you're playing? Also, you just put "at OUR game".

 

Ok, this last statement is incorrect. Look at this statement of yours:



You guys fooling sensors is ok but another vendor it isn't, Check! Yes because OUR tuning device has 3 dimenional tuning via TPS/MAP/RPM and can modify several sensors(O2 sensors, Maf,map and AIT)Yes because OUR tuning device has 3 dimenional tuning via TPS/MAP/RPM and can modify several sensors(O2 sensors, Maf,map and AIT)

Adding a fuel rail, 4 more injectors, all the wiring and modiles and making it works better and more simple than just adding 4 bigger injectors and a properly tuned pcm, CHECK! #1 you arent tuning the factory ECU #2 OUR way keeps all part throttle fuel trims in check the only mods are done at full load.


You admit the car is leaning out at higher rpm's but thats ok, check! The car runs up to 12.6/1 air fuel at the top end totally acceptable for this boost/ignition/RPM

You know what you are doing because you have made totally unrelated 4 cyl cars fast but i don't know what i'm doing because i've worked only on v6 and v8 cars, Check! As was said previous the shop employees and associates have a total of 4 ecotec cars(3 LSJ's and a 2.4 LE5), Our knowledge and experience is obviously good enough as we were a recommended engine management specialist in the build book and we tuned a GM Motorsports turbo ecotec for SEMA.



That's alot of our's and we's for someone who's just speaking for themselves.

 

I meant Mark and myself. Not anyone from RevIt Up. Keep fishing

 

]

Uh-huh. And the other post I made about GM?

 

Man you are fishing stay on topic which is better and what is the difference. No tracks are open here Atco is getting repaved ( I live up the road from it). Englishtown is closed till March. I am telling you I live at the track. I am at a first and last name basis with everyone at these track because I am always there. Hell depending on who is there, i don't even have to pay.

My car is twincharged. It is the only one that I ever heard of that is running with a piggy back (not stand alone) engine managment. To me this says that we (Mark and I) have a pretty good grasp of how to get this car to function properly with more boost. I do have ties and connections within GM and GM racing. I have done work on Gary Gardella's turbo 2.2 Cobalt SEMA car. SO by all means tell me about your accomplishments with the LSJ or any recent variants of the Ecotec.

Mark and I came up with the tune when we owned Psi-Fi motorsports. RevIt Up now sell that. I don't see a dime from them sales. They now want to expand on that tune, so Mark and I are outsourced to do such. I am not RevIt Up nor do I speak for them in any way. I say what I want and have no one to answer to. I prefer it this way.

 

Actually Yes I am I guess. Russ from GM contacted us and asked us to help out on the project car that Gary was working on. They SPECIFICALLY wanted a piggyback solution to show the ability of this car to be upgraded or "Tuned". They were unable to come up with a solution and pushed the car into my shop. I had it up and running in 3 hours. This was all the ime I was alloted due to the car being scheduled for SEMA. I have pictures which I would be happy to post up when I get home.

As it stands now I am waiting for Joe (Gary's crew cheif) to give me a call back after he finishes fabricating up some new parts, then I will retune the car. Go fish

 

Your argument here is a false.
GM does this because they have access to the PCM and the rest of us do not, yet. With millions of dollars and hundreds of engineers to do the testing, they can change any engine parameter at will they do not have to fool anything. Those of us that do not have those facilities in our back yard must work around the stock ECU until someone cracks the code. Of course a fully tuned stock PCM would be great, but unless you are GM its not going to happen until the pcm is cracked.

I have had my Psi-fi kit for 5 months and 5000 miles. I have had no problems with a 2.8 pulley. I live in St Louis and when I got the kit it was still 90 degrees outside, this winter it has been below 30 degrees car has run great at both extremes. Just my opinion

 

Speaking of staying on topic, I'm not here to boast about myself, nor listen to you boast. I want to hear you tell me again that it's ok to run a 2.8" pulley on a stock fuel system, when even GM doesn't agree with that.

 

No I said there is more power to be had by having more fuel. GO back and reread. I stated that the STG1 is good enough to get you going and is plenty safe. Safe being the main word not the end all be all HP maker. Lets do this line the 2 cars up and let them run. Currently a STG1 car ran 13.8s. What did your's run since you are a track guy and all?

I garuntee that there will be allot more 13 and possible high 12 second cars out there once the stg2 hit the market.

The only cars I seen hit the track are RevIt Up customers. What happened to your? Oh thats right they are too nervous about the knock retard they are seeing.

 

You asked.

 

Ok, so you're saying that with access to the PCM, you can run a 2.8" pulley on a stock fuel system? Please tell me how my arguement is false. All you did was back me up-thanks. Yes, GM has spent millions and millions on research, and even they run bigger injectors to drop a pulley.

As far as your car goes. You proved nothing with your statement. Where is your scan data? Are you scanning for KR? What is your injector duty cycle? Where is the physical proof that your stock injectors are not maxed? In fact, I'm in St. Louis as well, let's meet up so that you can show me your scan data.

 

The kit is safe.....meaning it's safe to run a 2.8" pulley on a stock fuel system? Please clarify. Also, I am NOT with INTENSE. I am my own person. I am all for seeing fast LSJ's. I encourage all of the vendors to come out with products. I am simply stating that I disagree with running a 2.8" pulley on a stock fuel system, and you've yet to prove me wrong?

 

Please ask where I told you to tell me that you fixed a car for SEMA? The only thing I'm asking from you, is to prove the theory of how safe it is to run a 2.8" pulley on a stock fuel system, which I've yet to see any proof that it's safe.

 

It is obvious that I am not going to divoulge how I did it and what I am doing now otherwise I might as well throw away any investment I have into it. The point is in the end result. The car is making power and has a safe air/fuel and ignition timing period.