GS FONZy

iTrader: (6)

That would be the case if the car was computer-less, but we know that's not the case. So for other people who want to give this a shot, beware.
However; I think there is a way to make it work, but it will take some ingenuity, a lot of dyno time and if you don't know how to tune, it will take lots of money for a tuner. And we still don't know how much of an improvement this will actually be over the race SRT ECU.
But after talking to Bliggity and the issues he was having, I came to the conclusion there is power to gain if you can succefully mate the SRT pipe with a adjustable fuel controller because the fuel ratio SRT runs is still too lean for optimal performence.

sam430

iTrader: (10)

Would forgetting to turn off the VSC affect the result? It shouldn't but that's just my opinion.

macd7919

iTrader: (10)

For everyone making judgements, this thread is worthless as a performance gain measurment without a basline dyno, period. Let alone the fact that there is no A/F reading for the run so there is no way to know if something is wrong.

Comparing the performance gained with the Srt intake to the performance of the stock intake without a baseline is equivelent to comparing the ratio of unicorns to leprechauns.

Somewhat off-topic, but the idea of running an Srt ecu in series with an AFC is alarming. You would be adding a variable voltage regulator to a fixed voltage regulator. Just get rid of the Srt ecu and tune the AFC for the map you want, having both in series is just redundancy.

Btw, before you start adding fuel to the mixture to "make more power", you do realize that running an engine on the lean side will make more power than running it rich.

sam430

iTrader: (10)

that number is way too low.. i guess i will have to do a basline and srt on the same day.

as i whined way before the dyno...after installing the srt, everything seemed under powered...yes it ''felt'' that way.

AZDesertGS

iTrader: (4)

SRT/ECU is a BIG waste of money.......I've said it before and I will continue to say it. You can dyno before and after all you want with this intake.....I did real world results at the track. Save your money .......does nothing but give you a little visual ego boost when you look at your minimal gain on the dyno sheet and empties your wallet.

macd7919

iTrader: (10)

I'm not denying the fact that it felt that way to you. More what I was getting at was:

1. If you lost power from stock then you would know there was something definitely wrong but we can't tell that without have a baseline run from the same dyno on the same day.

2. If you had an A/F readout that would help determine if you were having a fueling issue etc.... and would also help to determine if something in the Srt ecu programming was off or if it was a problem with the stock intake as well. For instance, with the stock intake if you dynoed at the lower end of the numbers mentioned previously, say 225hp, then dynoed at 234hp you still gained basically 10whp which is a hp increase of almost 5% which is still a nice power bump. If it turned out you had abnormally low numbers with the stock intake then you know that something else is causing the issues with low power. For instance, if you have a weak coil then it may not be able to handle igniting the mixture with the additional airflow of the Srt intake which would cause you to not see the gains you were hoping for. Again, this is just theoretically what *could* be the issue but the point is you need to have a good control before you start any testing, once you have that we can help you eliminate potential issues.

3. I'm sure you have heard this before but double and triple check your connections. They MUST be soldered, if you have a intermittent connection that could be causing the poor performance/sluggish feeling.

4. What kind of Dyno did you run your car on? It is not uncommon for Mustang Dyno's to read considerably lower than DynoJet dyno's (which most people use). If you happen to have been on a Mustang dyno, those numbers 234hp and 250tq would be approx 258hp and 275tq on a DynoJet.

sam430

iTrader: (10)

A few things. I did not solder the connections. I also noticed one of the fuel injector looked brown (could be something wrong there). I will wait after I install my headers and baseline it with that and with SRT.

macd7919

iTrader: (10)

Any idea what kind of dyno it was? That could be your low number reading right there.

sam430

iTrader: (10)

I have no Idea. Is there any clue that I can look into? All I know it's old with large rollers. It's not in the ground. Called the guy up...he said dynojet.

sam430

iTrader: (10)

This is my dyno result with SRT intake w/race ecu. I drove around for a couple of hours before I went to make my dyno appointment.

JBrady

Sam,

Did you ever get/install your headers?

Back to the original issue:

The above dyno sheet is the only one you did and it was in February, correct?

The SRT intake is designed to create a larger mass air flow meter (MAF). The rest of the setup creates a different (not necessarily better) air filter and a different/larger (not necessarily better) pipe to the throttle body.

The main point being the MAF as it utilizes the stock MAF element in a larger pipe. Unless there are changes to the ECU this will make the engine run way too lean. Stock engines are typically programmed to run rich since this is safer than lean. The SRT creates a lean condition that must be corrected. Now, you do not want it to be as rich as factory as that is "free" power especially if you are running 93 octane fuel. Since Calif has only 91 (if that) octane if the SRT leaves things too lean it will trigger the knock sensors. Those will tell the ECU to reduce ignition timing and that will lower power.

Without testing to know what the fuel ratio and timing really are we are just guessing. That said a properly working SRT intake will make the car feel somewhat sluggish at lower RPMs. Combine that with potentially too lean and pulled timing and your experience of a power loss is probable.

This does not make the SRT a bad part just that it must be calibrated properly for the fuel octane available. Not sure if they have those maps or not. Some have had good results with a K&N or other intake that keeps the stock MAF size and therefore will not need any ECU adjustments to run. That said the factory piping is engineered and works pretty well.

Some have had good results with a tuning device. Others report the ECU eventually compensates and pulls out the gains.

There is more than simple worked/didnt work going on here. Most mods are a trade off. For what its worth, from a pure performance standpoint, there are no tradeoffs with the headers.

sam430

iTrader: (10)

This number is associated with the original post. I have not dyno the car after the header install... I'm waitin on getting an Apexi NEO but contemplating about waiting since the NEO has issues and need a firmware update.

Right now, I'm enjoying the SS headers it's great. The SRT intake sounds great too, it just needs to be tuned (Although I hate the way it absorbs heat). Got an LSD (MKIV to install into stock housing/gear) and put on my TTE lip... lot's of work ahead.

Reading about Glen's 400 wHP got me daydreaming about a supercharger too. LOL.

SO, nope... no new dyno numbers yet until it's tuned with a neo.

Rock-a-Lex

iTrader: (4)

...wait up. There are issues with the Neo? What type of issues?

sam430

iTrader: (10)

There is a function that is not working properly... people who uses those function cannot tune their car. I don't know the specifics, since I don't have a neo to know if that function affects our car or not.

It's best to give apexi a call.

GS300-2002

What is the NEO that youre talking about because i am very close to buying the borla axlebacks and srt intake/ecu. Also where did you order the SS headers?