Hi All,

After months of comtemplating all the never ending questions..Supercharge, TT or ST, Greddy or APS to build or not etc..I have finally decided to go the PE TT route.

The kit has just been installed yesterday and is currently being tuned by my tuner.

Here's my setup :

Complete PE TT Kit
Walboro with 380cc injectors
Emanage Ultimate EMS
Pure Plenum Spacer
HKS True dual exhaust
Resonated pipes
Blitz i colour boost controller

Before the install, we did a baseline whilst the car was NA on my tuners dynopack dyno and the numbers were 338.1 Flywheel hp and 412.4Nm flywheel torque. This was done in 4th gear with a 15% drivetrain loss factor and 10 seconds ramp. I realise these numbers are not accurate but as I was not in town when they did it, I told them that we would have do it the same way when my car was boosted.

Well, I just came back from the workshop and they did a dyno run on 0.4bar(5.8psi) boost and the numbers were 437FWP(AFR was around low 12's and did not notice torque numbers) which were kinda dissapointing to me as I was expecting at least 30-40 horses more then that since the way it was measured as mentioned above would mean that the numbers would be inflated and I have supporting mods like spacer and full exhaust. Not to mention my baseline of 338 meant the TT only added an addtional 100hps!

I asked my tuner to up the boost to 0.6bar(8.7psi) and at first he said that there were 2 issues :

1. The injectors may not be able to supply enough fuel(I recalled reading in this forum that the 380cc can support a maximum of 400whp which I am currently very safely under even if @ 8.7psi boost) Don't think this is much of an issue.

2. The stock MAF sensor was at its limit @0.45bar boost. My Tuner said that at 0.45, the MAF voltage was around 4.9v and the max was 5v hence it would not be able to read past that.

Should'nt the Emanage Ultimate be taking over when the car is in boost and read off a map sensor or some kinda pressure sensor that comes with it???

I do not understand what has the MAF sensor to do when the car is on boost but my tuner said the stk ecu is still controlling the fueling/ignition as the EMU is just a piggyback. Can anybody advs on this?

My tuner has also advs that they are comfortable to push the car to 6.5psi and if I want to push it to 8.7, it would have to be at my own risk which means that if the engine goes ka-boom, they will not be responsible!

He also added that at 8.7, he would advs me not to run it for sustained periods and just for drags situations or short spurt races with race gas..our fuel here is 98 octane

Can anyone advs if what I have been told abt the MAF is true and what should I do? I need to advs my tuner if he should go ahead to up the boost to 8.7psi by tomorrow morning. Thanks.

 

A piggy back only helps control certain things. However. E-manage is SUPPOSE to incorporate and correct a/f on its own. It's suppose to perform it's own re-learn and correct any a.f problems to run in itself. The ecu is controlling the car. But the e-manage if I'm correct is suppose to run over the ecu.. I think he's a bit wrong. but piggybacks don't have complete control over the ecu as say a hondata unit for civics.. But I used emanage ultimate and its as close to a completly diff ecu as you get. I have that program on my cpu still. And you can control virtually anything from it. I was able to tune the car myself with it. So I have a feeling he might not be familiar with e-man ult. in the fact that, he is probly wrong. Altho the senors might still be reading things out.. But thats usually the point of an a.f guage....

I might be wrong. But thats my understanding.

 

Thanks. I understand that you can set the EMU to autotune by setting a target A/F. I did not install a wideband as was advs by my tuner that its not necessary as the EMU will be locked hence I will not be able to self tune it.

What I want to know is if his statement abt. the MAF(air flow sensor) will have difficulty reading past 5.8psi boost is true as I thought that a MAP sensor would be used instead?

Anybody? or is everybody at work now!

 

the e-manage has a map to recalculate the Maf signal voltage...every system has its limits...but you should still be well within the e-manage's working range...

 

I would go with what your tuner recommends and play it safe for now - a 100 hp increase isn't bad, esp at under 6 psi. When you decide to go for more, upgrade the EMS, fuel system, etc.

 

Can you pls explain in more detail what you mean by recalculating the Maf signal voltage, I thought the EMU would use a map sensor or pressure sensor to monitor the bossted intake charge? , and also how I would be able to remedy my problem so that I can boost to 8.7? Thanks

 

I wanted to get the Utec in the first place, but my tuner has never used it but has tuned a couple of boosted Z's on the EMU/Unichip, hence I'm stuck with it.

My first thought was to replace the injectors to 550cc, but he said it was not the main reason but he was more concerned with the MAF sensor reaching its limit. This is something I have not heard of or read in this forum.

 

Sounds like your tuner is more incompatible with your power goals than any of your hardware. Your location? Is SG = Singapore?

 

Hey Bro I rocked a PE TT kit for over a year and with 405 hp and loved it. Take my advise and keep it at 400hp, your car has the ability to run high 11's in the 1/4 with that HP. I would recommend a UTEC as a minimum if you go up in hp. I would get ride of that Eman Ultimate as soon as you can afford something else. I also had the EM U and IMO it sucks @ss, I then went with a UTEC and life was good, then went with a FCON and life was perfect! Keep it @ 400 till you can get a better EM.

 

haha..tell me abt it..I was shocked when I received an sms from my bro who brought the car in to my tuner..i was away and he sent me my dyno baseline numbers..i said..wow i must have one of them special cars from the factory!!!

But honestly, based on my research on this board, I was going to boost to abt 8psi and based on my set up, I was shooting for around 375-400rwp(dynojet numbers) and I'm pretty dissapointed at what I got.

If I do the maths, I would prob. be around 330ish rwhp DJ numbers..I was thinking maybe tomorrow I'll take the car for a drive before i decide on whether to give him the green light to up the boost. Will prob. try to call another tuner for a second opnion but he does mostly FCON's..

Yup SG=Singapore..wished I had the kinda support from the tuners for the Z like you guys have in the States..life would be soo much easier!