Just my opinion, i had a 340 in my Dart and it ran as quick as the 440 Valiant i had after. It had A bigger hydraulic and a little bit more headwork than the big block, whereas the 440 would get down the track on torque alone, the 340 did it on revs.
The 383 i've got now reminds me of the small block.
The 318 is a lot different to a 340, because without work they just dont rev.
Mick
318 v 340 v 360 Which is best?
Moderator: Moderators
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Anonymous
I think I am going to be going with a 360. Has anybody seen those basic tune kits from SUMMIT, come with holley carb, weiand inlet manifold, and voodoo cam and tappets. What does anybody think of that and only $870
could match them with a pair of ally heads and performance headers.
As long as it goes faster than my older brothers cossie i will be happy.
could match them with a pair of ally heads and performance headers.
As long as it goes faster than my older brothers cossie i will be happy.
If you are going as far as ally heads etc, it will be quick.
The matched sets of upgrades are ok, but it might be a good idea to find out what having one built would cost (ie. by Blue, Alex, or any one of a number of reputable builders linked with the club) to your needs.
For $4000 you can get a complete brand new 320hp 360 from Mopar Performance, that only needs a carb.
The matched sets of upgrades are ok, but it might be a good idea to find out what having one built would cost (ie. by Blue, Alex, or any one of a number of reputable builders linked with the club) to your needs.
For $4000 you can get a complete brand new 320hp 360 from Mopar Performance, that only needs a carb.
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Anonymous
360 has got to be best
personally after owning and tuning the 360 i would plump for the 360, as said before there are more cubes for a start and its as easy to find as a 318
i built on up using the summit rebuild kit with the keith black hyper thingy pistons, it runs a 231 purple shaft, 2.02 1.6 valves with 3 angle seats and slight blending on standard heads, a holley strip dominator intake , a holley 750 dp, headers at 1 5/8" running dual 2 1/2" system with H pipe and a turbo muffler each side. whole engine rotating assembly fully balanced
3600rpm stall convertor in shift kitted T727
all that lot in a ford capri with an all up weight of approx 2800lbs
running a LSD axle with 3.09 gears and 24" tyres
it will easily and happily rev to 6200 in an instant thats my limit but at that its so smooth
at the pod its ran 12.6 on street tyres , 12.3 on slicks with a 60 ft of only 1.85 due to me only launching at @1700rpm
keep your foot planted and it keep pulling to a self imposed mph of 130 - thats scary in a capri !!!!
get the 360 do a cheapish rebuild with easily available parts and keep smiling
if its money no object get the stocker kit and fancy ally heads, or if weights not an issue you cannot beat the old W2 cast iron heads - good enough for mopar racing for many years
i built on up using the summit rebuild kit with the keith black hyper thingy pistons, it runs a 231 purple shaft, 2.02 1.6 valves with 3 angle seats and slight blending on standard heads, a holley strip dominator intake , a holley 750 dp, headers at 1 5/8" running dual 2 1/2" system with H pipe and a turbo muffler each side. whole engine rotating assembly fully balanced
3600rpm stall convertor in shift kitted T727
all that lot in a ford capri with an all up weight of approx 2800lbs
running a LSD axle with 3.09 gears and 24" tyres
it will easily and happily rev to 6200 in an instant thats my limit but at that its so smooth
at the pod its ran 12.6 on street tyres , 12.3 on slicks with a 60 ft of only 1.85 due to me only launching at @1700rpm
keep your foot planted and it keep pulling to a self imposed mph of 130 - thats scary in a capri !!!!
get the 360 do a cheapish rebuild with easily available parts and keep smiling
if its money no object get the stocker kit and fancy ally heads, or if weights not an issue you cannot beat the old W2 cast iron heads - good enough for mopar racing for many years
Actually it's not really a cheaper way of casting, hypereutectic refers to the metallurgical composition of the alloy.
IIRC (it's a long time ago
), the eutectic point of an alloy is the point at which no more of one of the constituents can be incorporated in a homogeneous (mixed) form. Once you go above that eutectic point (hypereutectic) the alloying element forms separate particles since no more of it can be alloyed.
In the case of pistons, the element is silicon I think, so hypereutectic pistons have some free silicon in them, which makes them dimensionally very stable (hence the tight tolerance they can run) and also pretty hard and durable.
So hypereutectic pistons are BETTER than regular cast pistons. Not as good as forged, but better than cast. Very good value for money I reckon - just be CERTAIN to follow the tolerance instructions (especially ring gap)
IIRC (it's a long time ago
), the eutectic point of an alloy is the point at which no more of one of the constituents can be incorporated in a homogeneous (mixed) form. Once you go above that eutectic point (hypereutectic) the alloying element forms separate particles since no more of it can be alloyed.In the case of pistons, the element is silicon I think, so hypereutectic pistons have some free silicon in them, which makes them dimensionally very stable (hence the tight tolerance they can run) and also pretty hard and durable.
So hypereutectic pistons are BETTER than regular cast pistons. Not as good as forged, but better than cast. Very good value for money I reckon - just be CERTAIN to follow the tolerance instructions (especially ring gap)
Gavin Chisholm - 414ci W2 Stroker SmallBlock Panther Pink '71 Challenger convertible - in bits
Car progress can be viewed here
Car progress can be viewed here
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Anonymous
James whatever the fancy name for em Hyper whatever they are junk but a little less junk than stock.
Anyone putting them into anything forced induction needs their head testing.
They don't belong in anything performance, fair comment if it's being done to a budget but don't then think afterwards "more power needed" cos they will not stand it.
build a short motor right and once and it will last years without ever coming out of the car, you can then mess with heads/cams/intakes/carbs etc etc knowing the short motor is good and the last thing is price, the difference between hypers and forged doesn't justify having to use them
Now that's going to upset some people SORRY but you pays your ?? and takes your chances
Anyone putting them into anything forced induction needs their head testing.
They don't belong in anything performance, fair comment if it's being done to a budget but don't then think afterwards "more power needed" cos they will not stand it.
build a short motor right and once and it will last years without ever coming out of the car, you can then mess with heads/cams/intakes/carbs etc etc knowing the short motor is good and the last thing is price, the difference between hypers and forged doesn't justify having to use them
Now that's going to upset some people SORRY but you pays your ?? and takes your chances
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Anonymous
Ive used hyper malarky pistons, but i dont intend to Bananarama! to the point where it will matter. I spent some time reading US sites on the pros and cons and the general gist was that they are much better than stock aftermarket but not in the same class as forged
Also, read in Mopar Performance that standard Chrysler pistons (especially big blocks) are very heavy compared to the GM and Ford. They concluded that that was reason enough to change them!
Also, read in Mopar Performance that standard Chrysler pistons (especially big blocks) are very heavy compared to the GM and Ford. They concluded that that was reason enough to change them!
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Anonymous
Miles I agree with using Hyper if the plan is as you stated
"but i dont intend to Bananarama! to the point where it will matter."
As i've said before anyone who is even contemplating building a motor or getting one built the first thing to do is to write down a few things like....
1. what do I see myself doing with it in 3 years time
2. will I forever be happy with the HP it will produce on completion
3. will the bug bite
4. if the bug does bite how much and how far
there are lots more things to add to this but for a start IF the answer to even one of the above is "I'm not sure" then put as much into the short motor as you can possibly afford.
A 500ci + wedge short motor with a possible 1500hp+ upper limit is do able now but at 500hp it will last forever as long as cam/ignition and carb are all correctly tuned oh and the jockey looks after it, the rest then just becomes bolt ons as and when needed or afforded
the one thing I hate with a vengence is doing something twice
"but i dont intend to Bananarama! to the point where it will matter."
As i've said before anyone who is even contemplating building a motor or getting one built the first thing to do is to write down a few things like....
1. what do I see myself doing with it in 3 years time
2. will I forever be happy with the HP it will produce on completion
3. will the bug bite
4. if the bug does bite how much and how far
there are lots more things to add to this but for a start IF the answer to even one of the above is "I'm not sure" then put as much into the short motor as you can possibly afford.
A 500ci + wedge short motor with a possible 1500hp+ upper limit is do able now but at 500hp it will last forever as long as cam/ignition and carb are all correctly tuned oh and the jockey looks after it, the rest then just becomes bolt ons as and when needed or afforded
the one thing I hate with a vengence is doing something twice
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Anonymous
ok Kev point taken, I hate doing any Job more than once
No that's still not right
but ya get the picture
Miles i know where you're coming from as does everyone on here or for that matter anyone thats ever actually achieved anything, sods law states that every so often whatever can hit the fan will hit the fan and as you get more wound up the fan just spins faster and faster.
No that's still not right
but ya get the picture Miles i know where you're coming from as does everyone on here or for that matter anyone thats ever actually achieved anything, sods law states that every so often whatever can hit the fan will hit the fan and as you get more wound up the fan just spins faster and faster.