|
Message
Title: Nitrous Express says 75 HP
for the 540 (m- long)
|
|
Posted
by: JimLev on 2002-11-10 at 19:23:43
(posted from: Host:
cache-rp01.proxy.aol.com IP: 152.163.189.166)
|
Message:
And so does the kit I bought
from NOS.
What the engine will take and what the rest of the drivetrain
can stand up to are two completly different things.
If you want the drive train to last, 75 is probably a good place to limit it
to.
The torque increase for nitrous comes on instantly and if you are into
pulling hole shots and power shifting a manual tranny, you could do some expensive damage quickly. Slush
boxes will probably not be as abusive on the rearend,
but if the tranny goes, it's big $.
My kit was for my old 300ZX, a 3.0 liter engine. I had it set for 60 HP
boost. Never had one engine problem, but had to replace a bearing in the tranny and the rear suspension mounts, over a 5 year
period.
This wasn't too bad, as I did the work myself.
The gear backlash in the rear end was getting to be a problem when I sold the
car, but it did have 180K miles on it.
Usually when you get above 75HP you should have forged pistons and crank.
Anybody know if the 540 pistons are forged?
Another inportant thing to consider is the engine
will rev up so fast when the nitrous comes on, it is easy for the engine to
over rev and the RPM limiter to shut it down. There has to be some kind of
interlock to shut the nitrous off, otherwise when the RPM drops and the
engine comes back to life, the cylinders will be full of nitrous, BOOM.
Don't forget about cylinder pressure and those head gaskets. More HP equals
higher cylinder pressure.
Looking forward to more replys, before I put in my
540/6
JimLev
|
|
Message
Title: Nitrous Express says 75 HP
for the 540 (m- long)
|
|
Posted
by: JimLev on 2002-11-10 at 19:23:43
(posted from: Host:
cache-rp01.proxy.aol.com IP: 152.163.189.166)
|
Message:
And so does the kit I bought
from NOS.
What the engine will take and what the rest of the drivetrain
can stand up to are two completly different things.
If you want the drive train to last, 75 is probably a good place to limit it
to.
The torque increase for nitrous comes on instantly and if you are into
pulling hole shots and power shifting a manual tranny, you could do some expensive damage quickly. Slush
boxes will probably not be as abusive on the rearend,
but if the tranny goes, it's big $.
My kit was for my old 300ZX, a 3.0 liter engine. I had it set for 60 HP
boost. Never had one engine problem, but had to replace a bearing in the tranny and the rear suspension mounts, over a 5 year
period.
This wasn't too bad, as I did the work myself.
The gear backlash in the rear end was getting to be a problem when I sold the
car, but it did have 180K miles on it.
Usually when you get above 75HP you should have forged pistons and crank.
Anybody know if the 540 pistons are forged?
Another inportant thing to consider is the engine
will rev up so fast when the nitrous comes on, it is easy for the engine to
over rev and the RPM limiter to shut it down. There has to be some kind of
interlock to shut the nitrous off, otherwise when the RPM drops and the
engine comes back to life, the cylinders will be full of nitrous, BOOM.
Don't forget about cylinder pressure and those head gaskets. More HP equals
higher cylinder pressure.
Looking forward to more replys, before I put in my
540/6
JimLev
|