T O P I C R E V I E W
|
PunkINa5.SLOW
Member # 10
|
posted
See the stock block paranoia?
There was no parts failure here, except for the block.
Costly isnt it?
I have more pics email for more cam is bent and heads are damaged.
This motor came apart at 4,000
http://photos.yahoo.com/dans331pace
|
PunkINa5.SLOW
Member # 10
|
posted
By the way that is the only motor I have EVER assembled that came apart.
There was no nitrous and no boost on the motor.
I think the block was cracked already and the guy did not have it magged.
|
v8302stangs
Member # 530
|
posted
Woah
|
cobraman_1994
Member # 467
|
posted
wow
|
st5150
Member # 51
|
posted
Ouch. How did it happen?
|
PunkINa5.SLOW
Member # 10
|
posted
That was Giasi s old motor with a sleeve.
Evidentally there was a hairline up the webbing.
|
JohnB
Member # 969
|
posted
Well, you said it all Dan... ANYONE who is gonna spend the time building an engine should spend the $$ to have the damn thing mag'd. If they aren't gonna do it right, don't bother messin' with it. Also, sleevin' a 302? And a stock block at that? Man, someone was too lazy to pull one from the junkyard. Also, after the sleeve was installed, it should have been checked for cracks again...any decent machine shop does that. Lemme us all know the name of the place that did this fellas blockwork...so we ALL don't go there.
|
PunkINa5.SLOW
Member # 10
|
posted
Morgans Machine believe it or not.
Not my fault he was too cheap to mag it.
Sleeves are stronger than regular bores tho.
If you are gonna sleeve a motor I believe in sleeving all of the bores.
Dont believe the myth that sleeves are weaker. That is NOT true roundy round guys have been sleeving motors for years to make them stronger.
I used to think that sleeved motors were weaker (and I also thought that my first 440, which was 8.8 to one would run 12s) but I was proved VERY wrong.
|
jayl
Member # 185
|
posted
kinda got me worried with the title of this thread........but everyone should know the consequences of not doing it right the first time over........im sure the stroker will be fine as long as we dont go over the block recommendations on horsepower [ April 21, 2002, 03:49 PM: Message edited by: jayl ]
|
PunkINa5.SLOW
Member # 10
|
posted
My block is/was well prepped and mag'd but yes be very careful.
That block (the broken one pictures) previously withstood 606RWHP.
|
st5150
Member # 51
|
posted
quote: Originally posted by PunkINa5.SLOW: That was Giasi s old motor with a sleeve.
Evidentally there was a hairline up the webbing.
Yeah, I saw that... I was wondering how it went as in.... after a hard shift, as soon as the switch was hit, missed shift, high RPM, cruising down the street, ect.
|
PunkINa5.SLOW
Member # 10
|
posted
getting on the freeway
about 4-5K
|
shade-tree
Member # 298
|
posted
so you're block split before you sold it? or after?
|
JohnB
Member # 969
|
posted
You're correct, sleeves are stronger than bores..as long as the stock over-bore hasn't been exceeded. Most time folks/machine shops try to fix a block after the max bore limit has been reached. Most 302's will barely take a .040 overbore safely. Now, couple that with clearancing it for a sleeve...a bit too risky. Ya, no blame on your part...it's the behind the wheel. As for the block, it's gonna take alot more than a 4k blast gettin' on the freeway to do that sort of damage. It's been abused heavily. Shoulda spent the $100 or so to get it mag'd...live and learn. I recently had a fella want me to do a build-up for him on a 340 for a Duster (I recently swapped over from MoPars). He went all out on parts..best of everything...but he was soo DAMN cheap on machine work. He wanted it bored, and that was it. Just goes to show what's important..and what's not to some people.
|
PunkINa5.SLOW
Member # 10
|
posted
huh??
that is a 306 i built awhile ago and it split on the guy.
I was just posting pix cause Zimm and Eric Hand wanted to see why we are paranoid of stock blocks.
|
PunkINa5.SLOW
Member # 10
|
posted
Ahhhh the sleeve becomes the cylinder and you can bore it up to 80 thou
That is what they used to do back in the day to make a 360 out of a 302 with a 3.5 inch stroke.
Not sure what you mean by stock over bore being exceeded??
The stock bore is actually removed I've seen them do it down at the machine shop.
Maybe we are talking about two different things dunno..
Not important.
That was getting on the freeway about 4-5K I was in it.
It came apart because it had a hairline crack.
The block only had one dyno pull on it and two passes before that but it was in the 600RWHP range.
At the track the motor starved the #5 and #6 cylinders and torched the #5 piston taking the cylinder wall with it.
It was then sleeved.
I tried to get him to mag the block but he was being a cheap ass.
Im trying to point out what a mess it makes when the motor comes apart tho.
|
JohnB
Member # 969
|
posted
Stock over-bore..the max amount a block "should" be bored..and safely be used. Anything more than that, and you start dealing with core-shift, mis-alignment, etc. Whole other topic. Anyway...ya, stock blocks can/will be a mess when pushed to the limits...as this one did.
|
rob
Member # 50
|
posted
OMG! that is one helluva mess!
collateral damage just makes pushing a stock 5l block seem ludicrous...
|
yellow67stang
Member # 903
|
posted
Hey Dan,
That sucks!Why Im I in this topic? I dont remember what I said. Did I say that you can build a high horsepower stock block and never have a failure? Any engine can fail like that one did! I dont think I ever mentioned anything about stock blocks, just sportsman blocks and such. But maybe I am wrong. Is this like a "told ya so post"?
|