Has anyone step up to these heads? I'm starting to plan a build. The bottom end will be built around the top end.. they do require a 4.155 bore or larger.. thinking big bore and short stroke.
Dart has some heads for these engines which have some very nice combustion chambers.
It would help if you provided a link to which heads these are, and what the spec's are, particularly since these heads appear (at first look) to be of a splayed design.
Whatever intake that will let me bolt a kong2650 to it. Wouldn't be the first intake I've had to have made. Those heads maybe overkill. That's why I'm here to discuss with you guys... maybe better options to fit my need..What intake are you planing to run because nothing stock will fit.
Previous Next Info Tech-Sheet Info Recommended for maximum competition LS engines with 4.155” bore or larger. Drag race, maximum competition, naturally aspirated, heavy nitrous or forced induction applications. Dart’s New Race Series 10° LS cylinder head is the ultimate choice for maximum...dartheads.com
Well, congratulations you picked a nice set of heads.1500hp... at the crank. thats with blower and no2
Leaning towards a smaller ci. setup. Bore has to be 4.155 with the dart heads therefore it comes down to stroke as the determining factor.Well, congratulations you picked a nice set of heads.
These heads are what I call a 'Splayed Valve' design.
That means the valves are canted, while the ports are symmetrical, and not mirrored.
-here is that info-
Valve Angles: Int = 10° x 4° / Exh = 6° x 4° Canted valves with swapped Intake and Exhaust locations
Should be good for 1222 to 1251fwHP, NA Application,
with an internal engine volume of around 500 CID.
Also, the combustion chambers are for NA Engines, where
very high compression is desired, as the available sizes
runs from 38cc to 57cc.
Also, these heads are built for high lift NA Engines.
Notice that the flow goes to 456 CFM, but that flow
number is given at 1.00" of valve lift.
***Not Recommended For Street Use..lol
In an NA Engine we attempt to reduce 'Low Lift' flow
and enhance 'High Lift' flow.
Our engines are equipped with DD / PD Blowers.
And our camshafts do not use much positive overlap
which occurs at low valve lifts.
So we desire to enhance low lift, as well as mid lift flow,
as the DD / PD Blower makes the mass charge available
to the cylinder as soon as the intake valve is cracked.
Finally, look at the valve seat angles.
Available in 55° to 60° angles.
Helps to enhance flow, but not good for long term street use.
Pistons required are custom made.
Lifters must be offset by 0.150".
Valve Covers: 68000090 – Fabricated Aluminum w/ Dart Logo
Block Use: Dart LS Next Blocks with Standard lifter layout or Dart Prostock layout
What size engine are you building?
What blower are you using?
If you are still considering moving forward with those heads you really need to consider how high you would have to spin the small motor to be equivalent to a 500 CID engine which those heads were made for.Leaning towards a smaller ci. setup. Bore has to be 4.155 with the dart heads therefore it comes down to stroke as the determining factor.
Like to use a Kong 2650 blower if it can get me there.