Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
How ya goin guys ,I rebuilt a 202 red motor with celica 5spd conversion for my LC Torana with bathurst specs to rev to 9000rpm ,i had the flywheel snap and twist and break the bolts ,i have original flywheel bolts but arent sure of the tensile grade of them?I can get aftermarket grade 8 tensile bolts but they have a different head and look like hardware bolts....Whats the maximum torque setting on the standard bolts??I would like to torque them to 95 pounds but they may snap,or go for the aftermarket bolts??Am absolutely confused as to what will hold up to a hot motor????Cheers
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
hmmm dunno what was standard but its not unusuall for high tensile bolts to snap like that, often happens on earthmoving equip. only fix for it is to use a lower tensile grade of bolt
|
|
|
|
|
|
Rank: Veteran
Groups: Registered, Veteran
Joined: 22/05/2005(UTC)
Posts: 1,384
|
Ummm whoever built the motor should be able to get proper flywheel bolts for you. |
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
quote:
Originally posted by redracer202
hmmm dunno what was standard but its not unusuall for high tensile bolts to snap like
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
Fly - did you check the bellhousing alingment, flywheel runout? could be off a little causing extra vibes and stress. I had some offset dowles made when I did a conversion, was out .030" just a thought.
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 5/07/2005(UTC)
Posts: 349
|
Get some ARP bolts. Worth the money. Probably worth replacing the ones in the clutch as well.
I presume everything is balanced well, and when you got it balanced, you told who was doing it how hard you were planning on revving it to??? 9000rpm is a lotta
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 25/05/2005(UTC)
Posts: 117
|
Fly
Sandman is right about the balancing etc and 9000 is a hell of a lot of revs. At that speed there is no room for guessing and you will need the best of everything in that engine if you want it to stay together.
I have an old edition of US Hot R
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 5/07/2005(UTC)
Posts: 349
|
Yeh, it's a scary thought to have flywheels come off at high revs, not just for the driver, also anyone else in the line of fire.
I saw one come off a 308 HQ at high revs in a burnout comp. Luckily no-one was injured. Wrote the car off. Even took the g
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 20/03/2005(UTC)
Posts: 316
|
G'day Pete, Hows Roma treating ya? Got the Munro registered, a ball to cruise around in, you can check it out at, http://gallery.oldholden.com/Petes-Monaro/
Cheers, Pete. Old Holdens never die, they just go faster. |
Cheers,
Pete.
Old Holdens never die, they just go faster. |
|
|
|
|
|
Rank: Veteran
Groups: Registered, Veteran
Joined: 1/03/2005(UTC)
Posts: 1,991
Was thanked: 2 time(s) in 2 post(s)
|
that is a lot of revs especially for a 202. To be honest I doubt the rpm. And what does it prove? probably ran out of usable torque at 7500. Under NO circumstances go to lesser bolts. Holden did not put expensive hi tensile bolts in if cheap hardware stor
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
Munro looks great Pete. Let a message on ur site. PW
|
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
yeah sorry i should've went on to say what work on a pto drive on ya tractor aint to good on ur clutch id be gettin the best HT bolts i can find and double checking that torqe setting for em
|
|
|
|
|
|
Rank: Veteran
Groups: Registered, Veteran
Joined: 1/03/2005(UTC)
Posts: 1,991
Was thanked: 2 time(s) in 2 post(s)
|
I wonder if this is a genuine post. 9000 rpm is an awful lot. what sort of street motor would it be?
I think we bin had
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 5/07/2005(UTC)
Posts: 349
|
Yeh John,
Maybe he should get the tacho checked as well as the flywheel bolts. haha
|
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
