R33 Rb30 Conversion

[Cubes]

rpm = (speed / 28) * 100

this assume standard 4:11 diff ratio

160/28 = 5.714

5.714 * 100 = 571rpm.

It must be 2.8.

rpm = (speed /2.8) * 100

I know that equation is off on the dyno I run on.

[sky30]

Guilt toy, what pump you using and do you run a rising rate regulator?

I made 312rwkw with 550cc injectors with 044 pump and rising rate reg, only running around 75% duty cycle from memory.

[StockyMcStock]

you'll find that dyno RPM boost thresholds don't mean shit in the real world, especially with a manual vehicle.

for example, my car made full boost at 3700rpm or so from memory when it was on the dyno.

on the street, it's like this if you mash it from idle:

1st: full boost 4500rpm

2nd: full boost 4000rpm

3rd: full boost 3600rpm

4th: full boost 3000rpm

so dynos aren't really very accurate when you compare it to a real-life situation.

the only reason to be concerned is if the car feels bad on the street, or doesn't do what you want it to do. then you know you need to change things around to suit your driving style. for example, next time i get the car tuned for more power (up above 400whp) i'm strongly considering going to a larger supercharger drive pulley to push the turbo up to a faster spool and get full boost down to around 3000rpm on the dyno. after driving the thing for near on 2000km now, that's the only real change i have even considered making.

[frogstomp_R31]

http://forum.r31skylineclub.com/index.php?topic=48582.0

this is my progress now doing motor no 2 my bad

[Cubes]

What did Miltons charge for the bottom end build up?

I had them do my head but not the bottom end as they were (back then) just stupidly expensive.

[frogstomp_R31]

$1550 cracktested bored to 87mm decked and all balanced etc i use acl forgies std rods crank reground 10/10 same on the rods i also had them resized .

im hoping ive spent enough this time

[Guilt-Toy]

y do all the tuners use speed as one of their axis? god it gives me this shits!

Not my dyno - its my mates.. i just change what i needed to - just to get it how i know how to use it

yeah, but why dont they just change the bottom axis to rpm? seems farking stupid to me

How do you do it on a dyno dynamics dyno ? tell me how and il do it next time ! - considering i do all my tuning by myself it does not really bother me if its in km/h

Guilt toy, what pump you using and do you run a rising rate regulator?

I made 312rwkw with 550cc injectors with 044 pump and rising rate reg, only running around 75% duty cycle from memory.

I am using a Walbro 550hp pump - i wired it to a 12v relay etc etc... im using a sard fpr - i dont know if its a rising rate or what the rate is.

Funny thing is that at 317rwkw my injector duty is only up to 75% - its because it completly runs out of fuel - on the fuel pressure / flow tester it was going down to .5 litres a minute returning to the tank. So i am using pretty much all the fuel thats being pumped down the line. Need lots more flow and more reliable pressure.

Might get another walbro pump and stick it in the tank OR get a surge tank and a 044 and use the walbro to supply the surge tank.

Edited February 20, 2007 by Guilt-Toy

[frogstomp_R31]

does any one know if my greedy emanage will support a q45 afm i all ready know it can support the z32

[Cubes]

If you want to make some decent power get rid of that darn emanage.

[shanef]

Not my dyno - its my mates.. i just change what i needed to - just to get it how i know how to use it

How do you do it on a dyno dynamics dyno ? tell me how and il do it next time ! - considering i do all my tuning by myself it does not really bother me if its in km/h

no idea mate, but there should be a variable you can change somewhere...

[Sydneykid]

Not my dyno - its my mates.. i just change what i needed to - just to get it how i know how to use it

How do you do it on a dyno dynamics dyno ? tell me how and il do it next time ! - considering i do all my tuning by myself it does not really bother me if its in km/h

I am using a Walbro 550hp pump - i wired it to a 12v relay etc etc... im using a sard fpr - i dont know if its a rising rate or what the rate is.

Funny thing is that at 317rwkw my injector duty is only up to 75% - its because it completly runs out of fuel - on the fuel pressure / flow tester it was going down to .5 litres a minute returning to the tank. So i am using pretty much all the fuel thats being pumped down the line. Need lots more flow and more reliable pressure.

Might get another walbro pump and stick it in the tank OR get a surge tank and a 044 and use the walbro to supply the surge tank.

Use the rpm probe on the dyno, it goes on the ignitor loop, where the timing light goes.

Or input the tyre size and diff ratio into the DD computer and it will work out the engine RPM

Piss off that Walbro fuel pump, they are shyte. The 550 bhp rating is for an N/A engine, they don't handle boost, as soon as the FPR compensates for boost pressure, the fuel flow drops of dramatically. Go Bosch, they are rated for flow at 73.5 psi, so plenty of head room for boost.

cheers

[Guilt-Toy]

Thanks Sydkid

Could i use the walbro to feed the surge tank and use the 044 from the surge tank?

Just wondering if the walbro would be good for a pre pump.

Cheers

Use the rpm probe on the dyno, it goes on the ignitor loop, where the timing light goes.

Or input the tyre size and diff ratio into the DD computer and it will work out the engine RPM

Piss off that Walbro fuel pump, they are shyte. The 550 bhp rating is for an N/A engine, they don't handle boost, as soon as the FPR compensates for boost pressure, the fuel flow drops of dramatically. Go Bosch, they are rated for flow at 73.5 psi, so plenty of head room for boost.

cheers

[Adriano]

If the dyno doesn't have the rpm input(they are a rip off), then i set the speed to 101kph, and hold the car under gentle load at 100, look at the rpm on the handset etc(not the tacho) Then press "Control R"and set the ratio tacho in the top left hand of the screen to say 31.50 if it was doing 3150rpm at 100. when in power run mode, press control down and set the axis to rpm. you may then have to set the parameters using shift down to say 2000-8000. Im a bit rusty, but that should be right. The dyno should have a piece of cardboard that sits above the function keys and explains all this, but its probably sitting in the draw.

[frogstomp_R31]

im sure my emanage will be as good as a power fc ...? at the time i didnt have the cash fot a micro tec and got the emanage ultimate cheap and brand new so i didnt complain

[sky30]

Thanks Sydkid

Could i use the walbro to feed the surge tank and use the 044 from the surge tank?

Just wondering if the walbro would be good for a pre pump.

Cheers

I have my 044 mounted intank(it JUST fits in the stock bracket), not loud, and no surge tank needed.

[Cubes]

im sure my emanage will be as good as a power fc ...? at the time i didnt have the cash fot a micro tec and got the emanage ultimate cheap and brand new so i didnt complain

Unfortunately its impossible for the emanage ultimate to be as good as a powerfc as the emanage has limitations due to its design and its piggy back nature (stock ecu limitations, fuel cuts etc).

You'd be better off having the stock ecu remapped. That is providing you don't want to utilize the vct.

[Spoolup]

I also have the 044 intake, via a relay so it gets constant 12-13 volts.

[frogstomp_R31]

cubes i think ya missing some info on my motor /progress

i have a rb25de non vct head with performance springs at 90lbs i was told also been faced and ported.

i have gtr 444 injectors with resistor pak a kkr480 q45afm<= not fitted yet a bosch 910 and surge tank.

hoping for 400rwhp if i can make that with the emanage..?

as it was tuned last time at boost works

as a rb2030 yes a 20 head on a 30 block with vlt pistons no combustion chamber change just water jackets moved 3mm over to fit the 30 ... the problem i had is vlt pistons and rb20 head makes 180 psi cylinder pressure and add 12psi makes pistons fall apart espically after 380,000 ks old pistons made 150 ish and wasnts able to make any more due to rb20det afm neerly maxing out .. pluss 38 degree days didnt help

but my loss .. and ill start again

[frogstomp_R31]

the 20 head was stock but ported and std springs they floated at 12 psi i had reground rb20 cam pluss a hks 264 and recently lost that .

[Sydneykid]

Thanks Sydkid

Could i use the walbro to feed the surge tank and use the 044 from the surge tank?

Just wondering if the walbro would be good for a pre pump.

Cheers

Yep, Walbros are fine as long as they don't have to pump much pressure.

cheers