1/4 Mile Question:

[adis]

I wouldnt say that is safe...its a bit lean, considering the heat soak that affects the stock intercooler.

and there is no such thing as SAFE AFR's a motor will ping at 9:1 if there is too much timing and or heat.

On that set up, i had APEXi cooler.

This is the old set up graph, used it only to prove that MINES ECU is not the same as standard ECU.

[adis]

HAHA oh boy i wish nissan never made the standard ecu the way it is..

Im about to get a mines and try it out. Cheers adis!

on the mods i have now, big poddie, free flow exhaust, boost t, i ran 15.3 quarter mile at best on factory boost! the cars slow has hell and cant even get near 10psi as the ecu is totally gay! Just burns up a ton of fuel for nothing.

so im getting the mines coz its about 1k cheaper then a remap and tune, i can run 12psi, and it will lean it out a bit more then the standard ecu even putting out more power. i doubt you can lean out 12psi on the standard ecu let alone the mines one. so mines should be safe as.

plus i live in nz so we get max 15' C hahaha. love that cold weather.

I also got told that id put out 310hp with a remap chip and tune, front mount, and fuel pump. so for 2k i can have that much power. or for 400 bucks max i can have about 260 hp.

adis dyno proves that hes getting that power. but under that heat its never going to run good.

Mate, i didnt run this set up at Heathcote... If i did, i would have much better time to show! With this set up i had super responsive 208KW.

What i ran was much laggier hi flow, no apexi cooler, 190kw of laggy power compare to stock turbo 208kw, and in 25 got 14s flat, so you could probably pull low 14s with that set up i had a year ago.

[zebra]

an intercooler wont affect AFR's

[adis]

-only issue, first gear is laggy compared to other gears.

I don't think you should have any lag issues with 1st gear at the strip, revs should be way up there in the boost range when you let the clutch go?

Very true, but when i launched at 3000 or 3500, it would grip, and be laggy?

If i launched at 5000rpm, it looked like a burnout....

When i got 14s flat, i launched at 4300 and thats when i had least amount of lag, but ye, like i said, for some weird reason, my 1st gear is super laggy. puzzles me.

[adis]

Now, to throw a bit more fuel into the fire...since i got the conversation going...

I ran the car again on dyno, with 14psi car made 205kw, but, because i now have Bosch fuel pump(left over from previous set up), the car is running rich.

Here is the dyno. (dont forget in this dyno, im running hi flow turbo, -> MINES ecu is tuned for stock turbo, and 12 psi)

[zebra]

Fuel pump wont affect AFRs either unless the old one was half dead.

[adis]

Fuel pump wont affect AFRs either unless the old one was half dead.

Yes it will, car runs richer.

[Harey]

Generally, 100mph is a flat 14 in a 1500kg street car.

Did you have traction issues?

I'll be surprised if you really are getting over 200kW at the wheels. I'll bet it's more like 170ish which would make your time about smack on the money.

If you do have 220kW then you must have been spinning hard off the line. Try lower tyre pressures and a big smokey burnout to get some heat into em.

But then if you were spinning off the line you would likely have a faster trap speed for a flat 14, so I reckon you just don't have the power that you thought you did.

Ignore the ET. The single most important piece of evidence is the mph. Any halfwit of a driver can run a good mph. It is irrelevant of the launch, actually a slower launch will very slightly improve the mph.

The mph equates directly to power to weight. The mph lines up to around the 207rwkw the dyno shows.

Go to this site: http://www.warwickdragway.com/Calculators.html

Punch in 3100lb for the weight of the car and 105mph and it calculates you have 280rwhp which is spot on with 207rwkw. See how it doesnt care what the ET or 60' time is.

Then only if you have a good 60' launch will you net a good ET. If you use another calculator, you can punch in 280rwhp and 3100lb car and it will show you the best time you can theoretically run is 13.0.

Edited May 12, 2010 by Harey

[Messiah]

no it wont... unless like mentioned.. the old one was totally knackered.

the pressure regulator regulates the pressure.. hence its name.

the pump just pumps.

i know its richer now.. i'm not saying its not.. but you've found a symptom not a cause.

[R31Nismoid]

Ohh im back to MINES topic again (sick of it).

Please, Explain to me how factory ECU will perform better than MINES ecu on 12 psi.

Mods:

[*]Split fire coil pack / [*]Turbotech controller set to 12psi / [*]Apexi cooler / [*]K&N Filter / [*]Full exaust / [*]Greddy blow off / [*]Mines ECU / [*]Stock turbo, fuel and everything else.

-This map here, there is nothign wrong with it is there? Not too rich not too lean? You cannot tell me that you will get a graph like this from factory ecu so please dont tell me "there is bugger all difference", thats absolute rubbish.

Even when i just bought it, i felt the difference, so again, dont tell me there is no difference.

Umm what?

We are talking about the 16psi + hi-flow turbo setup here. Not the factory turbo one.

You know - the setup you were running @ the drags from your first post?

Car: R33-hiflow turbo, Mines ecu, 16 psi, 2.5 inch turbo back exhaust, split fire coil pack, apexi 3 inch intake, r34 cooler.

So clearly making 190rwkw + hiflow turbo + 16psi - something was gravely wrong... You asked what could have been a factor - we told you.

You didn't like what you were reading even though it's fact.

Dropping the exhaust then just made the entire problem worse.

Trent is WRONG.

Bit claim from someone without any proof.

So then - Prove it. Post up the mapping of your MINES ECU and then we can compare that to a factory one.

Totally your choice, but to call someone wrong without any evidence is a bit... odd.

And no before you try it again - a AFR run on a dyno does not count.

Oh and BTW - 210rwkw on a factory turbo just isn't going to realistically happen.

Not one person has run ~108-109mph with their "claimed" 210rwkw on factory turbos. I was running 110-111mph with 220rwkw as many others have.

Most get around 105-106 which is more appropriate to 200rwkw like 99% of more accurate results.

[R31Nismoid]

Fuel pump wont affect AFRs either unless the old one was half dead.

Correct.

Yes it will, car runs richer.

Wrong, again.

The Fuel Pressure Regulator controls how much fuel goes across.

The only time you will see things become richer is if the pump you are taking out is dying and unable to meet demands.

Changing a perfect working R33 factory pump with say a 700hp Bosch motorsport pump will show zero different as the the FPR controls it.

[R31Nismoid]

Punch in 3100lb for the weight of the car and 105mph and it calculates you have 280rwhp which is spot on with 207rwkw. See how it doesnt care what the ET or 60' time is.

R33 wet, with driver etc comes in a bit over 1400kg's mate.

~105mph is around 200rwkw in a full weight R33.

~110mph is around 220rwkw " " " " "

I raced on a fortnightly basis with around 1470KG's and 220rwkw. I would cary between 109-111mph with 220rwkw.

[PM-R33]

Wrong, again.

The Fuel Pressure Regulator controls how much fuel goes across.

The only time you will see things become richer is if the pump you are taking out is dying and unable to meet demands.

Changing a perfect working R33 factory pump with say a 700hp Bosch motorsport pump will show zero different as the the FPR controls it.

The man speaks the truth. Fuel pump change will definetely not affect tune, afr's etc. (unless as said, old one was f**ked).

Edited May 12, 2010 by PM-R33

[Harey]

R33 wet, with driver etc comes in a bit over 1400kg's mate.

~105mph is around 200rwkw in a full weight R33.

~110mph is around 220rwkw " " " " "

I raced on a fortnightly basis with around 1470KG's and 220rwkw. I would cary between 109-111mph with 220rwkw.

1400kg = 3086lb

1470kg = 3241lb

So its pretty close. I dont think its worth arguing about 207 and 200rwkw dyno figures as we are all know the inconsistencies involved. My only point is the car had a genuine 200rwkw to run 105mph. And if the launches improved a lot there is a low-mid 13 on the cards.

[mad082]

no it wont... unless like mentioned.. the old one was totally knackered.

the pressure regulator regulates the pressure.. hence its name.

the pump just pumps.

i know its richer now.. i'm not saying its not.. but you've found a symptom not a cause.

spot on.

there is no way the pump can alter the afr's unless the stock one was on the way out and not pumping enough as it should.

here is a very basic analogy of the fuel system

there is a bar that serves drinks to a set number of people every mintue. depending on how people are in the bar determines how many drinks it serves (this is the injectors). there is a doorman who only lets a certain number of people in the door per mintue, reguardless of how big the line is (this is the fuel pressure reg). then there is the taxi company who drop people off to the bar (the fuel pump). the taxi company can drop people of in a regular size taxi and there can still be a line up of people waiting to get in the door if they deliver at a faster rate that what the doorman lets people in. when all the taxis are operational then this is easily done. if the taxi company has 1 or 2 taxis broken down and can't drop as many people off then the people will be able to hop out and walk straight into the bar. if the taxi company stops using taxis and starts using buses to drop people off, no more people are going to get into the bar because the doorman still limits how many people get in. it just means the taxi company doesn't have to work as hard.

and there you have a very basic analogy of a fuel system, although it is a bit more complicated than that. but it does an example of proving how the fuel pump can't affect AFRs unless the old one wasn't working properly.

[PM-R33]

LOL! You put way to much effort into that man

[adis]

The man speaks the truth. Fuel pump change will definetely not affect tune, afr's etc. (unless as said, old one was f**ked).

Hmm okay, i was led to believe (by mechanic) that its now running rich due to pump, he even offered to swap it back for stock one... maybe he wanted more work.

So why is my car running rich now with hi flow turbo, when it used to run slighly lean on stock fuel pump and stock turbo...?

[adis]

spot on.

there is no way the pump can alter the afr's unless the stock one was on the way out and not pumping enough as it should.

here is a very basic analogy of the fuel system

there is a bar that serves drinks to a set number of people every mintue. depending on how people are in the bar determines how many drinks it serves (this is the injectors). there is a doorman who only lets a certain number of people in the door per mintue, reguardless of how big the line is (this is the fuel pressure reg). then there is the taxi company who drop people off to the bar (the fuel pump). the taxi company can drop people of in a regular size taxi and there can still be a line up of people waiting to get in the door if they deliver at a faster rate that what the doorman lets people in. when all the taxis are operational then this is easily done. if the taxi company has 1 or 2 taxis broken down and can't drop as many people off then the people will be able to hop out and walk straight into the bar. if the taxi company stops using taxis and starts using buses to drop people off, no more people are going to get into the bar because the doorman still limits how many people get in. it just means the taxi company doesn't have to work as hard.

and there you have a very basic analogy of a fuel system, although it is a bit more complicated than that. but it does an example of proving how the fuel pump can't affect AFRs unless the old one wasn't working properly.

lol, im learning =)

[R31Nismoid]

Hmm okay, i was led to believe (by mechanic) that its now running rich due to pump, he even offered to swap it back for stock one... maybe he wanted more work.

So why is my car running rich now with hi flow turbo, when it used to run slighly lean on stock fuel pump and stock turbo...?

The only time you will see things become richer is if the pump you are taking out is dying and unable to meet demands.

[adis]

Bit claim from someone without any proof.

So then - Prove it. Post up the mapping of your MINES ECU and then we can compare that to a factory one.

Totally your choice, but to call someone wrong without any evidence is a bit... odd.

And no before you try it again - a AFR run on a dyno does not count.

Oh and BTW - 210rwkw on a factory turbo just isn't going to realistically happen.

Not one person has run ~108-109mph with their "claimed" 210rwkw on factory turbos. I was running 110-111mph with 220rwkw as many others have.

Most get around 105-106 which is more appropriate to 200rwkw like 99% of more accurate results.

I cant prove anything, all i have is a dyno sheet, a car that hasnt "blown up or cooked" like some suggested, i also have personal experience running stock ecu and this ecu, and on this ecu, the car is faster. Thats all i honestly have.