destroked 340

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thadjackson

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I was just wondering if anyone on here knew the spacs pf the 340 trans am motors... I am having trouble finding any info on this destroked engine seems like no one wants to let out the secret....
 
It's no secret, 4.04 bore and a 2.97 stroke crank. Not the hot set up unless you are running a class that is pounds per cubic inch. Besides, you'd have to wind the snot out of it to make any power, 9000+ RPM. And that kind of RPM is not viable with 59 degree lifter blocks so why would you care anyway?
 
I was just wondering what the combo was .. I was watching the old trans am racers and got curios on building a repo of the old barracuda
 
hi, boy, i'll never ask any questions on here,!!! all I see, is he just wanted to know a simple answer.
 
hi, boy, i'll never ask any questions on here,!!! all I see, is he just wanted to know a simple answer.

Don't be afraid to ask questions man....Ya got to get to know Guitar Jones, at first he may come off as an *** sometimes, He doesn't mean it. lol :D :D :D
 
304 ci, high rpm, high compression, very short life span. Nothing you would want to build unless you are really going vintage Trans-Am racing.

These are NOT street engines in any way, shape or form.
 
Don't be afraid to ask questions man....Ya got to get to know Guitar Jones, at first he may come off as an *** sometimes, He doesn't mean it. lol :D :D :D
he is one of the members that is very knowledgeable:read2:
 
I dont think there's much of a secret. It's just something many racers are going the other direction on. Short stroke, in addition to fitting the rules while getting the maximum bore size for better head flow, pushes out and smoothes the power peaks so it's a flatter torque curve and is easier to drive on a road course.
 
hi, boy, i'll never ask any questions on here,!!! all I see, is he just wanted to know a simple answer.

lol, it's hard to convey intention in printed media. I don't mean to offend anyone but I guess sometimes it comes across that way. My written communication skills are not the best, sometimes my speaking skills aren't any better either, so sorry but I wasn't trying to be a smart ***. You'll know when I am.
 
Actually when you think about it Ole Guitar is sometimes like an old guitar. The initial tuning sometimes needs work but the end result is worth waiting for. :toothy10:
 
I want to thank those that have been understanding and kind. I know I can be blunt and at times brutal but that's been my life experience. Thank you all. Those that know me personally know I mean no harm, and quite frankly if you're a friend I'd do anything for you. What's mine is yours if you need it.
 
I want to thank those that have been understanding and kind. I know I can be blunt and at times brutal but that's been my life experience. Thank you all. Those that know me personally know I mean no harm, and quite frankly if you're a friend I'd do anything for you. What's mine is yours if you need it.
debit card and pin #?:toothy10::toothy10:
 
Wow................. was just hoping for some info... love the old trans am racing so i was looking into stuff my bad LOL...
 
I was just wondering if anyone on here knew the spacs pf the 340 trans am motors... I am having trouble finding any info on this destroked engine seems like no one wants to let out the secret....
The crank stroke was reduced to 2.97" giving 304 CID. I knew a racer running a Boss Mustang out of Vancouver, BC and met his friend from Seattle that ran a Z28 Camaro. Both used 9000 RPM red line but could push to 9500 to pass or keep from being passed. The Dodge and Plymouths ran 9500 but could be pushed to 10,000 RPM. The mandated carb was a special Holley that had the throttle plate size specified that gave about 820 CFM, but was expensive. John's team gave up a couple of HP and used the very common Holley 780.
 
The crank stroke was reduced to 2.97" giving 304 CID. I knew a racer running a Boss Mustang out of Vancouver, BC and met his friend from Seattle that ran a Z28 Camaro. Both used 9000 RPM red line but could push to 9500 to pass or keep from being passed. The Dodge and Plymouths ran 9500 but could be pushed to 10,000 RPM. The mandated carb was a special Holley that had the throttle plate size specified that gave about 820 CFM, but was expensive. John's team gave up a couple of HP and used the very common Holley 780.

You do realize this threat is YEARS old?

threads-dead-baby-threads-dead.jpg
 
The OP hasn't posted since 2012. You guys chased him off. :BangHead::BangHead::poke::lol:
 
I was just wondering what the combo was .. I was watching the old trans am racers and got curios on building a repo of the old barracuda
C'mon let me post this pic!

Oh yeah.....like this one?
transam.JPG


This car ate it up though.

AMC.JPG
 
The classic TA car that won that race was a 64 Pontiac Tempest, The Gray Ghost. Guy drove it harder in the corners.
They all take off and then I'm at past the backside straightaway at turn 9 waiting for the cars to come around the corner. We hear the car(s) and this guy comes hauling around the corner with his inside wheel almost off the ground, then the next car and pack is like 5 seconds behind him on the first lap! He continues his dominance over Barracudas, a Dart, a few Mustangs and even the favorite a yellow Z28. Kind a boring as most of these $$$ restored cars were just doing laps together but this Pancho was running balls out. There was actually a rub between 2 cars in a tight corner on the Jumbotron and the crowd went crazy, "Ooooh nooo!"
GTO-01-1200x800.jpg
 
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