Cleveland heads have always been renowned for their bad exhaust port design. I remember reading years back something about it being a design compromise to get the exhaust manifolds to fit in between the shock towers. Ideally they wanted the port to be much higher.
Racers used to machine the whole exhaust port off the head ad replace it with a new aluminum plate with raised exhaust runners.
Gains can be made by putting port tongues in the exhaust ports to lift the port floor and make it D shaped.
There's huge potential in the Cleveland heads but you guys in the US didn't get to see much of it as the motor was dropped in the early 70's. Australia kept going with the 351C in Ford sedans right up until the mid 80's. As a consequence we now have companies like CHI and others making some amazing heads for these motors.
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Mike Murphy
Melbourne Australia
Cobra Make, Engine: Harrison #100 under construction
Posts: 1,109
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Faaaaarrrrrkkkk Mikey, really didn't mean to start such a ****e storm!!
i only stated the facts a way an engineer not a mechanic or enthusiast would look at it !
i.e: hp per litre & hp per kilogram !
AT NO POINT was it mentioned which is cheaper to get hp from or anything else for that matter ....like maybe which is the better boat anchor etc.
At the end of the day what YOU LIKE is what suits YOUR application and if your happy with it nothing else matters to anyone but YOU
Faaaaarrrrrkkkk Mikey, really didn't mean to start such a ****e storm!!
i only stated the facts a way an engineer not a mechanic or enthusiast would look at it !
i.e: hp per litre & hp per kilogram !
AT NO POINT was it mentioned which is cheaper to get hp from or anything else for that matter ....like maybe which is the better boat anchor etc.
At the end of the day what YOU LIKE is what suits YOUR application and if your happy with it nothing else matters to anyone but YOU
I don't think of it as a sh!t storm. It's been an interesting discussion so far. I'm not an expert and I've learned some interesting stuff from this thread (always got to keep learning)
I think we are all grown up enough here to see the Pluses and minuses of each option and it's not always about max power numbers. These cars are a big part emotion.
I've said many times that I reckon over 400HP is probably a waste in a Cobra and both of these motors far exceed that.
There's huge potential in the Cleveland heads but you guys in the US didn't get to see much of it as the motor was dropped in the early 70's. Australia kept going with the 351C in Ford sedans right up until the mid 80's. As a consequence we now have companies like CHI and others making some amazing heads for these motors.
can anyone help in letting me know what sort of block those things are on in the video. i cant work it out, Cleveland or Windsor?
i cant decide if i should get a Windsor built up or put a Coyote in it.
An LS just seems like half way between the two. Not old school and not school - twin cam head with VVT.
but that's me.
mine will be going into a 40, so i need to think about gearbox and finaldrive availability. want something that will cruse at 100km/h, as well as move when in the power band and not drop out of it on gear changes.
Thanks, still trying to get my head around the options for engines. currently tossing up between a built Windsor or Coyote. The video that mike linked sugested that the coyote was short on capacity. sounds like they can take them out to 5.7L (351ci) so that would help a little, however by that stage would you be up around the cost of a built 427/434/451 as shown below?
if that's the case would it start to swing back to the old school direction?
20Likes
. But we werent talking about 18 degree heads, sb2, etc., we were discussing the LS engines.
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