Quote:
Originally Posted by _Sawyer_
What Price range is the average person looking at to have a rb25/30 engine built? I built 1 myself and including a rebuild, the turbo 5 speed and wiring the ******* up, it was close to 4g's and im dead serious so what the cost issue?
probably performance parts like forged pistons and rods.. and labour is a big killer...
my turbo kit was close to 4 g
i suppose putting a head on and internal with nothing on the out side is 4g,
but then u add injectors inlet manifold fuel rail ruel reg, ignition, ecu, wiring, fuel pumps surge tanks stronger trans or clutch
getting my head rebuilt and head gasket was $1800 which is half your rebuild, and that was just the head
but mind u i have 15psi at 3500 rpm, and 21 psi before 4000k (lots of wheel spin from 3500 up so hard to tell :P) but the datalogger had 21psi it just before 4000rpm which i was dam happy with
i suppose depending what your budget is and what u want to do
if i had my time again i would have just brought an rb26, and got a 6boost single turbo kit, (next mod, rb26, good bye rb30)
on another note, a mate has 500hp autec stagea, (rb26 running gear wagon)
that's thing has **** loads done to it, very nice to drive, but unless your around the 5000rpm or high it's not really on song, mind u it does rev to 8000 something
on the other hand i get the same sort of feeling from 3500rpm,
and i know that the stagea ways over 1700kg or something stupid like that, but it will be pushing to break a 10, and cost close to 20k to rebuild.
Well this is how I came to 4 grand
Rb25det and turbo box- 3'gs
Motor:
.50 tho oversized cast N/A pistons - Forgies not needed, not breaking world records
Crank linished, new bearings etc..
shot peened rb30 rods
RB25 twincam oil pump
1.5mm Oil restrictors
Standard Rb25 head with provision for VCT
Standard manifolds, turbo, injectors
Standard r33 computer
Extras:
NIZPRO FMIC
Pod filter
3inch exhaust, high flow cat
Bosch 910 pump, just for safety
Results:
158rwkw @ 6-7Psi
Ultra responsive motor
The Torque this thing puts out is unbelevable, just about perfect for the street it could use maybe a bigger turbo down the track,
But anyway, I dont think its fair to say they cost a fortune, It would easily cost near that to get an rb30et freshened up and running reliablely espically if you go to the wankers like rajab etc.
Quote:
Originally Posted by 6BOOST
Now lets take a dead stock good condition manual RB25 front cut. On the same engine mounts you have, the whole lot drops straight in, and other than a good clutch for about $600, needs no mods.
wouldve thought they were more popular if its as easy as you say, what about wiring ? custom tail shaft ? is the sump clearance ok ? or does it need a custom... gearbox mounts line up the same ?
very interested cheers
Some original photos have not been recovered yet.
Quote:
Originally Posted by h|ghland
wouldve thought they were more popular if its as easy as you say, what about wiring ? custom tail shaft ? is the sump clearance ok ? or does it need a custom... gearbox mounts line up the same ?
very interested cheers
The sumps are the same, the mounts swap over, the gearbox slots into the same crossmember holes, the shifter comes through in the correct position, someone may be able to correct me, but heaps of guys do the 25 box conversion over the MX7, so I'd say the tailshaft slots straight in, the standard fuel lines should be fine to 450-500rwhp, and bonnet clearance and chassis rail clearance are the same or better.
The only thing needed is wiring harness, and there are many people around that will do a plug and play style harness for $350-$450, it really couldn't be easier.
6BOOST
Some original photos have not been recovered yet.
RB30 FTW.
I'm not too keen on the rb25's with a big turbo for a daily. They don't seem to get up and go when considering the peak power they are making.
Quote:
Originally Posted by Cubes
RB30 FTW.
I'm not too keen on the rb25's with a big turbo for a daily. They don't seem to get up and go when considering the peak power they are making.
The trick is that you change the diff ratio to what was used in the Skylines.
The RB30E is a more low down grunty torque motor than the RB25DE.
But the RB25DE is more powerful from midrange upwards. Change the diff to 4.11 and it will feel completely different.
He still won't agree with you warpspeed, he has a skyline with a rb30 with
skyline gearing , and he's right, they are **** with a single, gearing or no gearing
cheers
darren
Some original photos have not been recovered yet.
