New Exhaust

[JimmyXR6T04]

yeah, they all try and sell you the bull...herrod tried it on me, luckily I didn't have the $2000 odd at the time otherwise I might have been swayed!!

out of interest though, my mate just bought an R33 GTR and he is putting a full racing exhaust on it... no computer mods. He reckons that because its a self learning computer (like the T) that it will adjust afrs and the thing will make lots more power and the computer will just add fuel etc where needed...

Anyone know if this is true?? I thought he'd need to get the thing tuned if he wanted max performance out of the mod. He is getting the ecu done, and air inductions soon, so I dunno.

When I was installing my mods, I went and had the cat done, then Simon sent back my edit, and all the other goodies arrived, so I was driving around with standard tune, and a 4inch cat for a day or so... just going easy, but I didn't notice any gains... even the one time boost did come on, it still only peaked at 4.5psi (I know I shouldn't have tried it, but I just had to see for myself). So from this, I assumed that the ecu detected a more free flowing system to expel the gas, and adjusted itself accordingly?

And the cat is a fairly reputable one, its a magic cat.. And Simon has tested them himself with good results. So I dont think that the cat is still a restriction like the standard... so I am assuming that the ecu adjusted... in saying this however, when I did bring on boost it was never foot flat to the floor... as I didn't want to risk damaging anything

[INASNT]

yeah, they all try and sell you the bull...herrod tried it on me, luckily I didn't have the $2000 odd at the time otherwise I might have been swayed!!

out of interest though, my mate just bought an R33 GTR and he is putting a full racing exhaust on it... no computer mods. He reckons that because its a self learning computer (like the T) that it will adjust afrs and the thing will make lots more power and the computer will just add fuel etc where needed...

Anyone know if this is true?? I thought he'd need to get the thing tuned if he wanted max performance out of the mod. He is getting the ecu done, and air inductions soon, so I dunno.

When I was installing my mods, I went and had the cat done, then Simon sent back my edit, and all the other goodies arrived, so I was driving around with standard tune, and a 4inch cat for a day or so... just going easy, but I didn't notice any gains... even the one time boost did come on, it still only peaked at 4.5psi (I know I shouldn't have tried it, but I just had to see for myself). So from this, I assumed that the ecu detected a more free flowing system to expel the gas, and adjusted itself accordingly?

And the cat is a fairly reputable one, its a magic cat.. And Simon has tested them himself with good results. So I dont think that the cat is still a restriction like the standard... so I am assuming that the ecu adjusted... in saying this however, when I did bring on boost it was never foot flat to the floor... as I didn't want to risk damaging anything

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In a skyline when you put a new exhaust on and stock boost raises the ecu will compensate and run the very rich a/f ratios they run in stock form. It wont go into limp mode or anything like that. To get the best performance you still need to get a full aftermarket ecu as the stock gtr ecu's cant be modified.

[Ninka]

they said that just the system will increase the kms. no edit as yet

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Tell us who "they" are cause "they" are full of sh*t.

Geea.

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What he said

[BOZZTURBO]

must be that exaust place up in brizziband

[bunna]

G'day

the 33 will get somewhere near that kind of increase mainly because its ECU will accomodate it as best it can (no doubt altering the AFRs on purpose will see further power out of it) however, too much will bring in overboost which won't leave the internals terribly happy for prolonged periods (nor the comp if its completely off the table).

The ford Ts don't get the gains because the management is so tight-arsed. As soon as the system detects you've got too much boost she steps in to protect everything else, knocking off the power dramatically. Of course, beforehand it'll do everything it can to keep torque output at the consistent, desired level, but it can only do so much before it has to play hardball.

Summarising - common turbo mods will do absolutely bugger all for the ford Ts until the ECU is edited (surely this has been said many times before).

[INASNT]

Stock turbos on a GTR wont cause the internals any problems as they are only good for around 250rwkw.

[bunna]

well then - there you go. Nissan's got the turbo as the first link in the chain to falter (which one won't go the distance?)

As I alluded to before - the ford system is fairly finely engineered. Generally everything is in balance from factory, so if you suddenly up just one area, you'd expect everything else to suffer (ie whack on a big exhaust, normally you'd expect more boost, meaning more fuel needed, possibly higher intake temps due to turbo running above efficiency (I know this isn't the case with the 35/40) - and don't forget the brakes!)

The difference with the ford is that in this instance the computer sees itself as the hero and is pretty much designed to step in and protect the mechanical side of things, given that everything was designed to go so far, so hard. Even by editing the computer the balance issue is still there - only there's no longer a failsafe.

Edited 29/08/06 05:20 AM by bunna

[INASNT]

Ford is one of the first factory turbo car manufacturers to use such a large turbo on a car out of the factory.

Its even bigger than the GT3040 unit I upgraded to on my skyline which gives 320rwkw at 1.4 bar boost

Not many factory cars blow the engine with the stock turbo.

Edited 29/08/06 06:15 AM by INASNT

[SavageF6]

Just on the topic of exhausts...

I was in a Ford service department a few months ago and the guy there was trying to sell me the Herrod twin system... he told me that I will get gains of about 50rwkw's... I laughed and left.  Haven't been back.  I hate being lied to... if it wasn't for this site I would've probably believed him as I wouldn't have have known any better...

Jack 

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Much like the chump that tried to sell me a John Bowe intake kit for my phoon. "Turns them into a complete beast". Pardon ol' chap? He then took me for a yawn, I mean a drive in an XR8 with all the John Bowe stuff fitted.....