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Will A Tune Make A Big Diffrence ( Worked 33)

dirtythirty3

By dirtythirty3,
in Engines & Forced Induction

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dirtythirty3 Contributor

dirtythirty3

Posted
Posted

Im not a retard i know a tune will make a diffrence as my car was tuned by jeff from speed lab.

The car made 271rwkw but iv now changed the exhuast becuase the old one was a 3inch dump. 2.5inch cat and 3 and 2.5inch pipes from cat back -.- a shit exhuast basically

now iv got a turbo back 3.5inch. Car feels much nicer n quicker to spool. But i notice people with 300rwkw and over still use 3inch turbo back. Will i get much of a change in power with a tune or sweet f**k all becuase 3inch is fine?

R33 s2

highflowed no idea on specs but it made 271 on 15-16psi

cheers

89CAL Grand Master

89CAL

Posted
Posted

Yeah check AFR's to make sure its all safe and will be good to see the difference

2.5" sections of exhaust running that boost and power would have been restricting so you will probably pull a little more power, wether the tune needs touching or not :)

gotRICE? Veteran

gotRICE?

Posted
Posted

I just swapped out my HKS Hi-Power Silent (lol) exhaust for a Trust PEII, Reason being, getting a cert, and its 103db. Needs to be 95.

The HKS is 3.75", and the Trust is 3". Since the Trust was put on, the cars running richer at idle and stalling occasionally. And is noticeably slower. So id say a light touch up on the tune will help.

Rolls Grand Master

Rolls

Posted
Posted (edited)

btw what the average price on highflows? Im thinking the previous owner went to the most expensive place to get mine

Can vary massively, why do you think that? Costs the same for a highflow that makes 220kw or 320kw usually.

Edited by Rolls
dirtythirty3 Contributor

dirtythirty3

Posted
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Cheers for the replys, il borrow a mates afr gauge, and see how its reading.

Oh just a few mates spend round 1000 or so and mine was done by ats costing 2400 not including oil lines n all that... Figured you could buy a new garret for that amount or hks.

Rolls Grand Master

Rolls

Posted
Posted (edited)

Ah, well thats good then. Stupid question im sure. Any idea on safe psi? Even just as a genral for highflows

PSI means nothing, it is all about airflow. Eg 5psi on a T51r is going to be pushing more airflow than a stock turbo at 12psi and hence make more torque, bigger combustion pressures etc.

I'm assuming you have an rb25 if so I'd say keep the power under 300kw, tune it very conservatively (rich and easy on timing) and if maintained properly should last you ages.

Things that will kill a motor are poor tune (detonation killing pistons and bearings), oil issues eg not enough oil and drifting = oil starvation, high revs for a long time filling the head with oil, limiter bashing causing oil pump failure.

Outright torque is almost never the reason why a stock RB has failed. So to answer the question, keep pushing more boost in until you make the power you want or it stops making power (limit of the turbo) or you run into detonation problems from the intake charge being too hot. If it is making 270kw on 15psi, then I'd say it could probably go to 20-22psi fairly easily, probably be making more than 300kw then though.

Got a dyno sheet? Or know when the turbo comes on full boost? Might make it easier to figure out how much power it could make and on what boost, ultimately we will be guessing though ask ATP what they think the turbo is good for.

18-20psi should be a good limit to aim for though, just make sure you insist the tune is safe, who are you getting to tune it?

Edited by Rolls
dirtythirty3 Contributor

dirtythirty3

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I take it pretty easy. So i imagine itl last. Even after a few hours of hills driving knock sensor never goes above 20.

Rev limiter is set to 7200rpm

il have to take a look when it makes full boost next time im out so il update thread. What gear should i be testing this from?

Iv got a dyno sheet il post up tomoz. Just moved out and after looking at elec bill this tune will be further away then i thought :(

fromwhat i remember on the dyno it was only reved to 6200rpm not sure why it was stoped as the power was massivley climbing

thanks for the info, this forums a millions times better then the rest

Rolls Grand Master

Rolls

Posted
Posted

I take it pretty easy. So i imagine itl last. Even after a few hours of hills driving knock sensor never goes above 20.

Rev limiter is set to 7200rpm

il have to take a look when it makes full boost next time im out so il update thread. What gear should i be testing this from?

Iv got a dyno sheet il post up tomoz. Just moved out and after looking at elec bill this tune will be further away then i thought :(

fromwhat i remember on the dyno it was only reved to 6200rpm not sure why it was stoped as the power was massivley climbing

thanks for the info, this forums a millions times better then the rest

Best way would be on the freeway load it up in 3rd or 4th and see when it reaches full boost then, dyno is best though.

Oh and if i could id like to take it back to jeff if i can find him, il put in new head gasket at same time

Oh so its an oldschool remap? or PFC if you have the knock counter? Don't change the boost until you can get it on a dyno with a decent tuner, I had a remap done by Jeff ages ago but I've heard he is in Melb now and not tuning so much. Perhaps try one of the big workshops here, boostworx, willall, Jaustech, even get hold of the Nistune guys they are great.

dirtythirty3 Contributor

dirtythirty3

Posted
  • Author
Posted

Pfc, nah i wont be changing anything. For now this is the daily.

Yea he vanished, seemd he was to popular.

When turbo tune tried tuning this car they could only get 240rwkw out of it... Shows how good jeff was.

When i canil start looking around for places or roadtrip to melbs ;) and some track work

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