340 4 speed vs 5.2 5 speed
5.2 magnum not old 318 2bbl , and a t5 wclass trans ( fox body ) with a cam and holley sniper efi , ill put my money on the little magnum,
ILL TAKE THAT BET BECAUSE ITS STEELING CANDY FROM A SLEEPING BABY!
pretty sure you cant beat the technology bump...the 5.9 kills the 340 already , 400hp and 440 of torque with a 4bbl and a camshaft + headers ( stock rotating and stock heads not even removed from the block 8.9:1 compression )
Incorrect, your Disillusioned in miss lead.
...the 340 needs roller rockers , high compression ratios , big camshaft and good bowl porting job / gasket match , good ignition , bla bla bla ...****
Incorrect. 100%, incorrect.
so why a 5.2 with the same good stuff than a 340 can beat it ? Because of its legendary status...comenon guys , its like comparing the newer hemis vs the old hemis and the 350 vs the ls....
Not because of legendary status, because the bore is larger, a lot larger. The bore of an engine has a DIRECT impact on power, particularly the HP level.
3.91 vs 4.04 is a huge .130 increase. In terms of cylinder size, that’s huge! Any overbore you add to your 3.91 bore can be equally matched by the 4.04.
Like the down town hoe always say,
“The bigger THE BETTER BABY!”
U say u want mileage , but yet ur going with 3.55s or 3.91s. Then for sure u need the od tranny. But ur still in a dream world with ur lil 318 if u think ur even gonna be close to a 340 or 360/5.9. Kim
The addition of an overdrive is an excellent idea I say everyone should go for if it is within there reach or build parameters. What is the OD ratio of that transmission above? It would be a math equation of 3.55 X OD ratio = final drive ratio.
I don't think it's a dream, 5.2 has bunch of potential everyone always writes these off .
I 50/50 agree. The 318/5.2 is normally stupid cheap if not sometimes free (318) They can be made to hussle quick and even go fast. I am so not breaking anybody’s balls on there use in any form at all. But to think it can beat a 340, yeaaaaa, not so much.
Being they share the same stroke, they will basically rev the same and produce similar curves on the dyno. The 318/5.2 will just be lower and end sooner.
Ignoring a 318/5.2 for a build is stupid but it should be looked into and pondered before ether ignoring it or going with it. It can be a very good engine for the purpose at hand.
Creating a hot rod engine from one can be done as easy as any other engine for roughly the same price. Piston selection and cost are the variant. Everything else is the same. The only other build parameter to be aware of is the cam size. The cam tends to act bigger in a smaller engine. The 318 is on that side of the fence and the 340 is not on that side.
Ditching a 318 in favor of a 340 is a recommended move if spending the extra money on a 340 block and then sonic checking it to see if it is a suitable block is OK for you, then OK, do it, go 340, but be aware that block might be a turd and you have just wasted your money.
I don’t like to gamble but sonic checking an old 340 is a gamble. I have lost twice.
