Flywheel Question

[tm_r33]

is the standard rb25 flywheel in my 33 gunna be fine to balance up on my rb30 crank and use in my 2530? im assuming that there wasnt any huge weight difference between rb25det flywheel and rb30e flywheel? i have the box out of my 33 already so access to flywheel is easy and my crank is sitting at my engine builders waiting for a flywheel so we can balance it.  thanks james

[tm_r33]

any one lol? Need to start putting this baby together

[snozzle]

all rb engines use the same flywheel so yes but id recommend a chromoly flywheel for peace of mind, herd some bad stories with high hp cars and stock flywheels

[KiwiRS4T]

all rb engines use the same flywheel so yes but id recommend a chromoly flywheel for peace of mind, herd some bad stories with high hp cars and stock flywheels

Like what? Flywheels disintegrating at high revs???

[tm_r33]

down here in hobart recently a flywheel came off an old holden and injured someone pretty badly but old holden engines had a habbit of loosing flywheels once high horse p.ower was run through them. Rb engines however are not built anything like an old 308. I do have a lot of trust in a standard flywheel for upto 400hp. And as its an rb30 bottom end being built it wont be revving as high as i had to rev the 25 bottom end.

Excellent, if all flywheels are the same i will pull the flywheel off the back of the 25 tonight.

Secondly, snozzle, do u run a chromoly flywheel? If so, what brand and what are they worth?

[JonnoHR31]

all the same, except redtop rb20 which is a little smaller.

[snozzle]

the can develop cracks after alot of abuse and eventually shatter - im running a twin plate that comes with a chromoly flywheel

nismo/exedy etc etc do lightweight chromoly flywheels

if you baby your car dont worry about it but if your gonna give it some abuse (majority of people on this forum) you should opt for a chromoly flywheel, not worth taking the risk, in my opinion

[tm_r33]

the can develop cracks after alot of abuse and eventually shatter - im running a twin plate that comes with a chromoly flywheel

nismo/exedy etc etc do lightweight chromoly flywheels

if you baby your car dont worry about it but if your gonna give it some abuse (majority of people on this forum) you should opt for a chromoly flywheel, not worth taking the risk, in my opinion

hahah i read this a day too late. standard flywheel already been balanced up with my crank and balancer. and yes car will be getting the ring smashed out of it. TRACK ONLY (plus.... secret, confidenial, shhh shhh, night time, back road, test work

)

oh and im guessing the heat scortch marks on my standard flywheel are normal??? i hope so....! If i hear any more 'shattered flywheel' stories im going to sh*t myself and build a scatter plate in my gearbox tunnel lol

[JonnoHR31]

aslong as they're not massive yer they're normal. wouldnt hurt to have it machined while its out. but probs too late now if you've balanced everything

[tm_r33]

my engine builder didnt seem to think it would need machining.