Top RB20 Club... do you have over 260rwkw?

[Roy]

Great work...

RB20DET swap (stock con rods, pistons/rings, cams)

-SDS stand alone engine management

-Turbosmart manual boost controller

-Custom intake manifold (Greddy type)

-Innovate Motorsport LM-1 wideband kit

-Garrett GTPR turbo, Hybrid by Tial, T04E Compressor:3'' inlet, 2'' outlet, A/R .60; Turbine: T3 inlet, 2.5'' outlet, A/R .63, T4 bearing journal core w/big T4 shaft

-OEM cast iron exhaust manifold w/wastegate bong added

-Tial 38mm wastegate

-Tial BOV

-Nismo low temp thermostat (165 degrees)

-custom copper 3 core rad

-Tomei metal headgasket 1.2MM thick 80.5MM bore

-ARP main gurtle bolts

-ARP con rod bolts

-ARP head bolts

-N1 oil pump

-HKS fine tune timing belt

-444cc injectors (oem GTR)

-Walbro 255L/hr fuel pump (with 3/8 line from back to front)

-Custom FMIC

-Q45 80mm throttle body

-B&M short shifter (Modded SR shifter)

-ACT HD street clutch 512 ft/lbs capacity

-Custom one piece drive shaft

-Nismo tranny mount

-Custom 3inch exhaust from front to back (no cat)

-Vibrant 3inch sleeper muffler

-VLSD (oem '91)

-Adjustable rear toe control arms

-Adjustable rear camber kit

-Adjustable rear traction rods

-Faze gauges, oil pressure and engine temp

-Mickey Thompson E/T Drag 26 X 8.5 X 15

-TIC brake line lock

How is it you are getting over 300kws with 444c injectors? Plenty of rail pressure? No denying the thing is running great times

[FastRB20]

I don't get it either, it's a complete mystery to me too, i'm running the stock rail and regulator, whats really gonna freak s*** out and when I say my stand alone is telling me I'm running 50% duty on these injectors at an A/F of 11.7 constant throughout the revs up to 8K, lmfao. They were sold to me as OEM R32 GTR injectors, they look it, yellow top feed Nissan inj.....

[Bunky_r31]

either way that's some top results dude

i think the only quicker rb20 i've heard of was a jap one in a gts4 that took out it's class in some drag battle over there

that was doing high 9s lol

aussies got to get our shit together and play catchup!

awesome work

[Cubes]

Definitely not stockers then.

My 444cc injectors flow tested up as 480cc with 40psi base and 100% duty.

On the dyno they max'd out at ~250rwkw and required a 1point afr drop on idle (15:1 to 14:1) via the nismo adj fpr; it then grabbed 268rwkw on from memory 85% duty. The Z32 is swallowing ~4.75volts.

[AD4M]

mine runs stock gtr 440cc injectors and there not maxed out yet.. seen GTR's use them past 400 hp aswell without being anywhere near 100% duty cycle

[Cubes]

As the old rule goes.. 444cc is around 450 crank hp; 450hp is around 260rwkw (depending on dyno); mine were maxed with a 11.5:1 afr at 250rwkw and required more pressure; pump is a new bosch 044 mounted internal and larger 300zx/gtr filter.

Nothings iffy with it; on the same dyno my rb20det injectors were at 100% duty for a little over 180rwkw to hold a 12:1 afr.

Another blokes rb20det with std injectors managed 190rwkw but the afr's were creeping close to the 14's.

Sky30's old RB30DET at 312rwkw was at around 85% duty on his 550cc's, then there was rbmans rb30det which was around 230-240rwkw and was nearing 90% duty with gtr injectors also. All on the same dyno.

In saying that I suspect that a car that makes more torque requires more fuel for a given power level as it will tend to make its peak power at an earlier rpm.

If a motor makes the same peak power at 6000rpm vs one at 8000rpm from what I've seen the 6000rpm peak power requires a little more fuel.

AD4M, where does yours make its peak power?

[jnr32r]

FASTRB20 THAT IS AWESOME !!!

Have you got a dyno graph? What other plans have you got in mind for the beast?

Also what sort of compression are you running? With a 1.2mm gasket would it raise much?

Edited December 23, 2007 by jnr32r

[AD4M]

In saying that I suspect that a car that makes more torque requires more fuel for a given power level as it will tend to make its peak power at an earlier rpm.

If a motor makes the same peak power at 6000rpm vs one at 8000rpm from what I've seen the 6000rpm peak power requires a little more fuel.

AD4M, where does yours make its peak power?

afr's sit on mid to low 11s at first and the power dies off in the top end because it has alot of fuel dumped to keep the motor alive and topples below 10afrs.

[Sydneykid]

I have a worthy RB20 to add to the list, but i would be cheating some, my donor chassis is a 2520lbs 240sx (2700 w/me in it) hehehehe, managed a 11.07 at 128.8mph, 1.521 '60 at low boost (22psi), and from experience, I'm well over 300kw at the rear wheels

the 11.07 run, 1.521 '60: http://videos.streetfire.net/video/19672bf...99e00b51eab.htm

an earlier run 11.48 at 114mph, 1.524 '60 : http://videos.streetfire.net/video/a8b026e...98e0175d428.htm

running slicks of course, 26 X 8.5 X R15

I'll be crancking the boost some this summer with a few more mods, looking to be in the deep 10's, how low i'm curious

Sylvain

Please excuse me, but I am a facts based realist and, as the guys on here know, I tell it like I see it.

No way it's got 300 rwkw with standard R32GTR injectors at standard fuel pressure, my experience tells me that there is no magic when it comes to engines.

Some further evidence;

The ET indicates ~220 rwkw

The TS indicates ~190 rwkw

The dicrepancy (220 versus 190) is due to the use of drag slicks on what is most likely a prepared track

Cheers

Gary

[Sydneykid]

afr's sit on mid to low 11s at first and the power dies off in the top end because it has alot of fuel dumped to keep the motor alive and topples below 10afrs.

While I am in a realist mood, let's move on to this one.

The ambient temperature is 21 degrees and the inlet air temp is 33 degrees. That's a 12 degree correction factor, rule of thumb 8 degrees is worth around 5%, so the 405 rwhp is really 374 rwhp or 279 rwkw.

Cubes observation that "a car that makes more torque requires more fuel for a given power level as it will tend to make its peak power at an earlier rpm" is pretty close. Perhaps a better explanation would be that the maximum injector flow rate determines the maximum torque output. Since horsepower is simply torque X rpm, the higher rpm (lower torque) would allow slightly more horsepower with the same injector sizing.

Back to the car at hand, I have never seen a GTR make more than a genuine 265 rwkw with standard injectors. The extra 14 rwkw (265 versus 279) could be put down to the "Cubes" effect and/or the slightly lower drivetrain losses in AD4M's case.

As I said, no magic in engines.

Cheers

Gary

[Roy]

Well i know im about to max out my injectors at 260rwkws an i need to up my feul rail pressure, in which case i know several GTRs that are all making 300odd (ball park) on std injectors and have been doing do for 2 or so years. Still bigger injectors are the way to go when i can afford them.

Then i can wind the boost up to 24 psi and see if i can get a little more mumbo in the mid range.

Also SK, the TS indicates only 190rwkws? He ran 128mph! With 215rwkws i was only running 112mph. And re AD4M dyno figure. Its a dyno figure so whatever, i always thought it was normal that inlet temp is 10-20deg C higher then the ambient.

[FastRB20]

Also SK, the TS indicates only 190rwkws? He ran 128mph! With 215rwkws i was only running 112mph......

I'm with him, i've been around drag cars for a while now (dozen yrs or so), and seeing someone pulling off 130mph trap speeds with a 2720lbs car with only 254-295rwhp (190-220rwkw) is not realist to me...I'm curious to know where you dug up these numbers from Sydneykid, they make no sense....and yes I know that running stock GTR injectors and making this much power makes no sense either, I don't know more than you do on that note...

Edited December 24, 2007 by FastRB20

[FastRB20]

FASTRB20 THAT IS AWESOME !!!

Have you got a dyno graph? What other plans have you got in mind for the beast?

Also what sort of compression are you running? With a 1.2mm gasket would it raise much?

Thx , appreciate it

I have yet done dyno runs, the 1/4 runs were done on simple road tunning. Since i'm running the stock exhaust manifold I would like to see what improovement I would get using an aftermarket tubular manifold. For the compression ratio, since the stock headgasket is 0.9-1.0MM thick and smaller bore than the Tomei gasket, it drops the compression ratio down some, did not bother doing the maths to know exactly what it is but i'm guessing it ain't much.

Sylvain

Edited December 24, 2007 by FastRB20

[Sydneykid]

Also SK, the TS indicates only 190rwkws? He ran 128mph! With 215rwkws i was only running 112mph.

It's in a lightweight 240SX, not an full weight R32GTST like yours. Take 200 kgs out and see how fast your's goes.

And re AD4M dyno figure. Its a dyno figure so whatever, i always thought it was normal that inlet temp is 10-20deg C higher then the ambient.

Why? Because some guys typically stick the DD temp probe behind the radiator to inflate the power figures. Was the dyno run done with the bonnet open? Usually, so the tuner can listen for detonation. So why the hell should the inlet air temp be higher than the ambient?

Cheers

Gary

[1400r]

nismo make yellow 555cc gtr injectors

the simple answer is often the truth

[FastRB20]

It's in a lightweight 240SX, not an full weight R32GTST like yours. Take 200 kgs out and see how fast your's goes.

Cheers

Gary

its still 2720 lbs,

meh!! after all this, finding out power output is an estimation, either mathematically found by the car's weight, trap speed & ET (which from my and a dozens other's calculations say that my engine develops in excess of 400rwhp) or from a dyno pull which I have not done yet, but still no method is precise, so there, we can speculate all we want, we will never know the truth of it...,

nismo make yellow 555cc gtr injectors

the simple answer is often the truth

This is interesting info....

Edited December 24, 2007 by FastRB20

[Roy]

It's in a lightweight 240SX, not an full weight R32GTST like yours. Take 200 kgs out and see how fast your's goes.

Why? Because some guys typically stick the DD temp probe behind the radiator to inflate the power figures. Was the dyno run done with the bonnet open? Usually, so the tuner can listen for detonation. So why the hell should the inlet air temp be higher than the ambient?

Cheers

Gary

Im just going on the observation of the probe i used to have on the foam HKS air filter i had. It always ran about 15deg C (traffic, 10ddeg C higher on the highway) above what the air con was indicating for an ambient temp. That was with a shield, so with the bonnet up or down it wasnt making much difference to the temps, be it on the dyno or on the open road.

But interesting to note that the figure could be a few ponies optimistic....a 12 flat in a manual RB20 means more to me then any dyno figure anyway.

[1400r]

^ Ive seen pink to but I think these were a old model

[LedZepLen]

Im still in the midst of my rb20det build but checkout this guy whose selling a R32 GTS-T with a rb20det on ebay with what appears to be a stock bottom and top end with stock intake manifold and claims to have made 503hp at 14psi but has it at 3 right now.

http://cgi.ebay.com/ebaymotors/1993-nissan...1QQcmdZViewItem

what do you think, i think he just made a number and realized it was a time bomb and got scared. Damn nice interiour though.

[Roy]

No way it smaking that power...but who cares. Its cheap and has some nice parts and mods. A decent tyurbo setup and another wrecker RB20 would see it on the way to being a decent enough car