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R33 Rb30 Conversion

JNR24

By JNR24,
in Engines & Forced Induction

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Duncan
Duncan

Just thought I would bump this 20 year old thread because the Skid Factory have just posted up a video summarising a lot of the content, format might be more familiar for newer members

JNR24
JNR24

fyi guys, Well yesturday i picked up a RB30 for my conversion into my R33. I will be using my RB25DET head on the RB30 block. So i started stripping the motor down, pulled the crank, pistons, girdle

Cubes
Cubes

Here is all I have at the moment: http://www.geocities.com/r32_jjc/ Unless you are on broad band make sure you right click then save as. The file is around 120kb. If there is anything I have got w

Posted Images

Cubes Grand Master

Cubes

Posted
Posted

Den001,

The Rb30's require a larger turbo to obtain the lag and then hard ramp on to boost you are referring too.

That same turbo on the rb25 or 26.. lag lag lag bang kick in the arse. Its the nature of increased displacement. Boost is developed over a wider rpm range.

To clarify.. is that 652rwhp or fly hp?

benm Grand Master

benm

Posted
Posted
thats good power but for that ammount of boost, i think there is somthing wrong

I tend to agree, a 3L with a gt34r running over 30psi and only making 360ish rwkw?

Are you sure all 6 cylinders are firing?

rockabilly Rising Star

rockabilly

Posted
Posted (edited)

cheers guys.

firstly fuel car is running shell v - power 98ron pump fuel.

second. it has 2 in tank tomei fuel pumps wired seperately to two relays.both relays are working and both pumps are working

we checked that plus fuel pressure is 3.5 bar too.

graphs i will put up when matt @ the racing line finally gets the car to run..

2.17 bar is not what i will run

the car is mapped for 1.5bar 590bhp/540lbs @ 5500rpm @ the fly

also 1.8bar 620bhp/585lbs @ 5500rpm @ the fly..

the graphs look like the evo graphs, torque and bhp follow each other to the top, car makes boost from 2800rpm climbs quick and steep from 3500rpm.redline at 7000

you are all right for that boost i would have expected 700bhp @ the fly and maybe 600lbs torque.cant understand why bhp is the same as torque.

when i get the graphs i will see more but at 1.8 bar it made 500bhp @ the treads which he says is 620 @ the fly..

bernie. any comments from you guys or tuners would help.

the electrical problem has got all the tuners baffled here.

if this helps the tuner, if you set the fuel map up say from 1000-5000 rpm and the afr goes from 15 at 1000rpm to 11 at 5000rpm, then let the revs drop back to idle. and do it again this time without altering anything at 1000rpm fuel is 20 and as you rev it up it goes up and down reaching 30 in some cases.>>>???? bernie

Edited by rockabilly
Cubes Grand Master

Cubes

Posted
Posted

26psi.. 500rwhp so around 373rwkw + given its a 4wd dyno so saps just a tinny little bit more power out of the final figure.

Its close enough bah.. Only a dyno figure.

I'm sure it feels fast and will break 3rd gear if your not carefull. lol

What spec cams are you running?

Alf Proficient

Alf

Posted
Posted (edited)

With a s1 R33 25det VVT head can the bulky inlet cam gear be changed to an Rb20 or adjustable one and still retain VVT?

Reason being I'm trying to make it look like an RB20, ie cam covers, coil cover and timing belt cover.

Edited by Alf
-==L=a=N=c=E==- Rising Star

-==L=a=N=c=E==-

Posted
Posted
With a s1 R33 25det VVT head can the bulky inlet cam gear be changed to an Rb20 or adjustable one and still retain VVT?

Reason being I'm trying to make it look like an RB20, ie cam covers, coil cover and timing belt cover.

the bulky inlet cam is the major part of the vvt, so you would lose vvt by removing it.

If you want it to look like an RB20, then find an rb25de and put all the rb20 dress up gear on it.

Spoolup Mentor

Spoolup

Posted
Posted

It is the cam gear on the inlet side that operates the VVT - so removing it or the camshaft itself will stop the VVT.

You can run a std cam in the inlet with a std cam gear or adjustable one ( so you can use the STD rb20 cover etc ) but you will lose the vvt option.

den001 Proficient

den001

Posted
Posted
Den001,

The Rb30's require a larger turbo to obtain the lag and then hard ramp on to boost you are referring too.

That same turbo on the rb25 or 26.. lag lag lag bang kick in the arse. Its the nature of increased displacement. Boost is developed over a wider rpm range.

To clarify.. is that 652rwhp or fly hp?

i understand and agree with you totally, but look at the boost its running, thats big boost, for that amount of psi going thru the motor, you would think that the turbo would come into its own and it would be in its efficiency range by far..... have a look at the clip again... listen to the turbo ramping and then listen to the revs of the motor, there is not real much positive gain from the forced induction.... this is what i mean..

im not bagging the motor, it makes power, but the way it makes it is doesnt seem right, to me it seems like its a massivly decompressed motor obviously making the power but look at the boost its eating, it revs way to slow, it eats 2.1bar boost and all on 98 pump fuel.... this is the characheristics of a decompredded motor...

im building a 30/26 now, with 8.8-1 comp.. and i tell you when it comes on boost it will come on... and it will be a t04z with a 1.0rear.... and the aim wil be to make it rev like this machine....

http://www.youtube.com/watch?v=caoHNZFufHU

this is how the engines should be set up... rb30 have in my eyes a very good rod ratio... 1.8-1. if you car rev out a 26 so hard there is no reason why you cant do it to a 30... especially with a twin cam head...

TiTAN Grand Master

TiTAN

Posted
Posted
i understand and agree with you totally, but look at the boost its running, thats big boost, for that amount of psi going thru the motor, you would think that the turbo would come into its own and it would be in its efficiency range by far..... have a look at the clip again... listen to the turbo ramping and then listen to the revs of the motor, there is not real much positive gain from the forced induction.... this is what i mean..

im not bagging the motor, it makes power, but the way it makes it is doesnt seem right, to me it seems like its a massivly decompressed motor obviously making the power but look at the boost its eating, it revs way to slow, it eats 2.1bar boost and all on 98 pump fuel.... this is the characheristics of a decompredded motor...

im building a 30/26 now, with 8.8-1 comp.. and i tell you when it comes on boost it will come on... and it will be a t04z with a 1.0rear.... and the aim wil be to make it rev like this machine....

http://www.youtube.com/watch?v=caoHNZFufHU

this is how the engines should be set up... rb30 have in my eyes a very good rod ratio... 1.8-1. if you car rev out a 26 so hard there is no reason why you cant do it to a 30... especially with a twin cam head...

Considering its only a 600hp turbo 650hp isn't a bad figure. http://www.turbobygarrett.com/turbobygarre...2R_714568_1.htm

r33_racer Grand Master

r33_racer

Posted
Posted

man ive been missing out here. Gone a few weeks and everything happens. Nice power rockabilly, but thats alot of boost!

Old mate in NZ reckons he can rev out his twin cam 30's to 10k and reckons they will last.

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