Re: 340 vs 360 class racing
[Re: moeflo]
#470718
09/18/09 12:18 PM
09/18/09 12:18 PM
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Joined: Feb 2007
Posts: 2,578 sweden
1Fast340
master
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master
Joined: Feb 2007
Posts: 2,578
sweden
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Quote:
The only reason to use a shorter stroke motor is, you already have one, or you need the most HP per CI. Other than that, build with plenty of stroke and your valve train will thank you.
yep thats one of the good reasons, another one is if you can make more power than your existing chassi can handle with a stock stroke then there isnt realy a good point in making more power and especialy more torque down low (that may actualy be a good reason to work on getting the car capable of handling more power instead of trying to limit torque at lower rpm but sometimes its a way of trying to make something work that isnt suposed to work)
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Re: 340 vs 360 class racing
[Re: Paul_Fancsali]
#470719
09/18/09 12:41 PM
09/18/09 12:41 PM
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Joined: Sep 2003
Posts: 378 So. Cal.
ElefuntMan
enthusiast
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enthusiast
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Posts: 378
So. Cal.
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Focus on class racing. There are few here that do it or have tried it, a "full on build" is not about class racing. Class racing is about blueprinting. Making what you have as close to perfect as possible and then getting it to work.
From my experience both are great engines, I have set NHRA records with both. I would build the car you like, not build an engine combo for a spacific class, then get a car you may not be happy with, if you have the luxury to pick and choose. Do build a car that will be competitive in it's class, if there are lots of dominant cars in the class you WILL need to out perform them, so build one with potential.
Any way you go, a 340 or 360 in just about any combo is a good way to go class racing, as for the small blocks high compression 340's have been my favorite, a wide variety of cool car bodies, carburator and HP combo's and great parts availability.
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Re: 340 vs 360 class racing
[Re: Locomotion]
#470720
09/18/09 02:39 PM
09/18/09 02:39 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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Quote:
There are a lot of variables within 340's as well as 360's in Stock and SS, so it boils down to "it depends".
'71 high compression 340's with a TQ tend fit and run in slightly faster classes than the other 340's and 360's. The '74 360 is right behind it, but they are used in heavier cars. Then it appears that the AVS 340's and later 360's run is several of the slower classes after that. Car weights vary quite a bit. In Stock, this tends to be spread out from D/Stock up through K/Stock or around there. Basically mid-10's through high 11's.
Moparts member Elephuntman had the C/SA record with a 340 Six Pack Challenger T/A in the 10.30 range at one time!!!
There is no substitute for cubic inches, so, all else being equal, a 360 will be faster. It would be intersting to do some research and see what the average '71 340 would run against the average '74 360 at the same weight. I'm sure somebody more familiar with the class weights and ET's would know already
I kindof agree here but I would like to see the factory low comp 340 VS 360 4bbl comparison, oh yeah we do have them and with the same cams heads carbs manifolds... actually a very close comparison and the 360 made more HP and more TQ from the factory.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 340 vs 360 class racing
[Re: HotRodDave]
#470721
09/18/09 02:49 PM
09/18/09 02:49 PM
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Anonymous
Unregistered
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Anonymous
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I had a good Duster bracket car ( good enough Mccandless bought it) with the exact same heads , cam , intake, rockers, carb--I mean the very same parts--not some "like" them--back to back test swapped 340 shortblock for 360 shortblock--both zero deck flat tops with same weight stock rods etc The 360 was at least a tenth quicker in the 1/8--Car was a 6.90 car--Even after the 360 got some laps etc it was always a tenth quicker at every track I went to--Stroke is the deal-- and even that little bit made a diff -- CR was the same except for the tad extra from the stroke on the 360--
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Re: 340 vs 360 class racing
[Re: Moparteacher]
#470724
09/18/09 04:01 PM
09/18/09 04:01 PM
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Joined: Aug 2003
Posts: 4,988 new jersey usa
11secdart
master
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master
Joined: Aug 2003
Posts: 4,988
new jersey usa
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Like I said I`ve ran quickest with a 360 but I did go 11.35 with my 9 1/2 to 1, 557 lift cam, ported J head, stock stroke 340 and it made around 450 hp on the dyno.
Last edited by 11secdart; 09/18/09 04:02 PM.
68 Dart 410 / 904 92 D150 original owner 21 Ram 1500 Quad Cab, Big Horn , Hemi ,4x4 23 Audi Q5 16 Honda HRV
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Re: 340 vs 360 class racing
[Re: ElefuntMan]
#470725
09/18/09 04:33 PM
09/18/09 04:33 PM
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Joined: Oct 2003
Posts: 7,143 my own world
theraif
master
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master
Joined: Oct 2003
Posts: 7,143
my own world
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Quote:
Focus on class racing. There are few here that do it or have tried it, a "full on build" is not about class racing. Class racing is about blueprinting. Making what you have as close to perfect as possible and then getting it to work.
From my experience both are great engines, I have set NHRA records with both. I would build the car you like, not build an engine combo for a spacific class, then get a car you may not be happy with, if you have the luxury to pick and choose. Do build a car that will be competitive in it's class, if there are lots of dominant cars in the class you WILL need to out perform them, so build one with potential.
Any way you go, a 340 or 360 in just about any combo is a good way to go class racing, as for the small blocks high compression 340's have been my favorite, a wide variety of cool car bodies, carburator and HP combo's and great parts availability.
Thats why i wanted to build my 73 wagon to run R/S its a cool car and not many in the class lol
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Re: 340 vs 360 class racing
[Re: 69L78Nova]
#470728
09/19/09 05:11 AM
09/19/09 05:11 AM
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Anonymous
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Anonymous
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Quote:
Quote:
Oh ya'..all depends on who builds it..
Doesnt matter who builds it. Build a 340 and a 360 identically, run them in the exact same car, same setup, and the 360 WILL win.
No it won't...
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Re: 340 vs 360 class racing
[Re: 69L78Nova]
#470731
09/19/09 01:32 PM
09/19/09 01:32 PM
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Anonymous
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Anonymous
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Quote:
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No it won't...
Are you out of your mind? Are you really going to start this arguement again? There is nothing special about a 340 as an engine. Cubes are cubes. The 360 WILL edge it out if both are built equally. If you dont think so, you have a lot to learn, and are just displaying a high level of ignorance...based on more than just your user name.
....And I do have experience with both 340s and 360s
Your the one starting an arguement a question was asked i gave an answer you disagree with it,your the ignorant one not me..i'll build a 340 that'll kick the snot out of any 360 you can...
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Re: 340 vs 360 class racing
[Re: 70AARcuda]
#470733
09/19/09 03:14 PM
09/19/09 03:14 PM
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Joined: Feb 2004
Posts: 6,257 acworth / N. georgia - south e...
cheapstreetdustr
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Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
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imho and experience. its the compression that has to be factor'd the architecture on these engines for the most part are identical.. so now you have 3.58" Stroke of the 360 to compare..which is obvious.. then you have compression or pistons in the early model 340s...that werent availible to the 360 next is carb..which by now is prolly not an issue.... stroke and the extra 20 cubes..should go to the 360..as the winner..
cheapst.
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured [image][/image]
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Re: 340 vs 360 class racing
[Re: 69L78Nova]
#470736
09/19/09 07:02 PM
09/19/09 07:02 PM
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Anonymous
Unregistered
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Anonymous
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Quote:
Quote:
i'll build a 340 that'll kick the snot out of any 360 you can...
Yeah, not only is that immature, but its also ridiculous. Whats to stop me from saying I can build a 360 thatll beat the 340 you build? Get out of here. Keep the dopey replies coming. They are amusing
BTW...My dad can beat up your dad
Saying is one thing doing is another...trust me any 360 you get will be embarassed by a 340 of mine...I see your from Arizona time to get out of the hot sun,its affecting your judgement
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