[enginejr]

Check these out, this was a stock based circle track engine. pretty sure it tore the wristpin out of a piston and dropped the rod into the the main webs, it came around and broke the cam (check out all the lifters) it chucked one rod out the side of the block. the hole is in number 3 and thats the number 4 rod at the bottom of it. the #4 piston is still in the hole minus wristpin journals.

[Trans Am Tony]

!!!!!!!!!!KA-BOOM!!!!!!!!!!!!!!

That engine must have been turning some serious rpm's for that kind of destruction. It's gonna take more than a little duct tape to get that thing running again........

[66GMC]

Ouch!
Reciprocating mass not reciprocating.

[78 monte]

Last time I blew a motor like that,I had to sleep in my car in a skating arena parking lot.LOL
305 sbc flung a connecting rod out onto the ground.

[Chevrolet4x4s]

KAPOW


Shane

[Notorious]

How not to increase the parts count in your engine.
Reminds me of a Cleveland I blew up qualifying on a dirt track one time years ago. The track was very gummy and the car was really hooking up. I thought I'd drop it down a gear and really cut a lap. Well I did, set fast time..... It let go taking the flag. Short night.

[DoubleVision]

Aw that ain`t nothin`, Pour a can o` bars stop leak inner n` keep gettin up!
YA MULE! YA!

[302 Z28]

Originally Posted by DoubleVision

Aw that ain`t nothin`, Pour a can o` bars stop leak inner n` keep gettin up!
YA MULE! YA!

Or a can of that miracle Restore . Kinda looks like the 307 in my 70 Nova after I dropped a valve at 6500rpm .

Vince

[killerformula]

I heard this once from the announcer at the Indianapolis dragstrip:

"looks like we had a high-speed unscheduled engine disassembly on that one folks!"

K

[schnitz]

I have no clue what the big problem is. I see nothing wrong at all.



Just slap the intake back on, and peddle it off on Ebay as an engine with "bonus features"......



In a while, Chet.

[Chevrolet4x4s]

Originally Posted by 302 Z28

Or a can of that miracle Restore . Kinda looks like the 307 in my 70 Nova after I dropped a valve at 6500rpm .

Vince

Dont forget the JB Weld
Shane

[66GMC]

Originally Posted by 302 Z28

Or a can of that miracle Restore . Kinda looks like the 307 in my 70 Nova after I dropped a valve at 6500rpm .

Vince

Something tells me the 307 wasn't stock, right?
I just can't envision a 307 revving that high.
307's had a bad rep ... the "boat anchor" of the SBC family ... is what I recall.

[DoubleVision]

Many thought that of a 307. I like them, they were ignored because no factory high performance version was ever made. but they are a small block chevy, and like there brother small blocks excluding the 262 and 267, when you give them the right parts they will respond. There`s a article on the web where they took a stock 307 and added some goodies to her and made 315 horsepower, very respectable. a 307 will make a 305 look like a fool with equal mods. There is also the myth that these blocks were plain jane blocks and did not have any tin or nickel in the casting so they wore out quickly, this is a myth, I have had 2 307 blocks and I still have one now that has 10 20 under the timing chain cover and on the rear of the block. I would not hesitate to build a 307, but all you can get for them is destroked "rebuilder" pistons that have .020 whacked off the compression height. They still carry forged pistons for a 307 that would work fine, but who`s gonna be willing to pay $500 for them?
Many 307`s came with the factory 300 horse 327/350 cam, and the lobes wore out very quickly so a cam swap was in order. The myth of the 307 being a boat anchor was by whom I call "the small block experts" these are the guys you meet that have no clue what there talking about or doing but they go by hear say, I`d rather try something myself before I pass judgement. A friend of mine said his 70 model pushed out the freeze plugs but the plug hit the motor mount cracking the block, so he called the 307 junk, how was it the engines fault he didn`t have anti freeze in it? The 307 is a hybrid, 283 bore of 3.875, 327 stroke of 3.250, both engines had high performance versions in there day, since the 307 is both, it can perform too. The 307 and the 327 both have rod ratio`s of 1.75:1, considered by many professional racers as the best all around performance rod ratio.

[302 Z28]

Originally Posted by 66GMC

Something tells me the 307 wasn't stock, right?
I just can't envision a 307 revving that high.
307's had a bad rep ... the "boat anchor" of the SBC family ... is what I recall.

The little 307 didn't take a whole lot to wake it up. Crower 280 hydraulic & rev kit, Tarrantula intake, Holley 600, Cyclone headers, and a Muncie 4 speed. Very solid 13.5 second car.....until kaboom. Broke it at the local dragstrip Wednesday night grudge race while I was home on leave from the USAF. Was scheduled to get married the following Saturday. Had to really hustle to scrounge up an engine and get it in and tested before heading back to Abilene Texas. My kids and friends have heard the story several times, oh and I had to use $150 of my then fiance's money to do a quick overhaul of the replacement engine.

The 70 Nova probably weighed in at about 2900-3100lbs. I estimate the HP figure was around 320-330.

Vince

[Biggarmike]

I'll second the cam troubles! We used to think we were engine builders (what 16 year old high school gearhead doesn't?) We cammed them up and thought that we could make them scream with 1.94/1.50 valved heads and a big 4 bbl. We sure went through a lot of cams and $35 junkyard sourced 307s just learning that bolting crap together doesn't equal a performance engine. (307 cores were $20, running / minimal smoking $35. A 327 or 350 was $75-$100, too much for us, that was two weeks pay!)