b head advice
#1
b head advice
hello, i need some advice regarding a 98 cobra
i am building it up for american iron, road racing action, and it needs to remain Naturally Aspirated.
i need about 350 rwhp, and 360 tq, which will give me just a little wiggle room, depending on her final weight after the cage, and all.
i think i want to do some b heads with port/polish/valve job, and cams.
looking for advice.
the car will NEVER see forced induction
it may, down the road get a built short block with higher CR, and stroker crank (+/- on this),
maybe never, if the heads/cam/intake get me where i need.
what do i need to get and do. to reach my goal
i am looking to maximize are under the curves, not for peak numbers.
i want a long flat torque curve, and to be able to use as much rpm band as possible.
this will be a strictly road-course racing car.
does it matter what 4v head i start with???
cobra vs Lincoln Mark VII, vs (do navigators come with some DOHC / cobra-compatible heads?)
how much of a P/P? i don't want to go too wild, and take a step backwards, considering i wont be adding FI
should i even port em at all, and just do cams?
oh yeah, where are we right are now:
stock power plant with :
LTHs, off road h pipe, and flomasters with dumps/turn downs
smog pump/egr delete,
a K&N filter,
and steeda 10% UDPs, and an aluminum DS,
yielded a disappointing 287/283.
not sure how much he left on the table, if any
thanks,
doc
i DID just read the sticky, about heads
wow,
a lot of info, and things to consider.
in the 1st part of my post, i indicate i had been planning on staying with B heads, since that is what the car has,
and by doing so i dont have to switch from a return to a returnless system (or di i have that backwards?)
now, having read the sticky,
i am even more confused as to what will be the easiest/cheapest to reach my hp/tq goals, naturally aspirated,
doc
i am building it up for american iron, road racing action, and it needs to remain Naturally Aspirated.
i need about 350 rwhp, and 360 tq, which will give me just a little wiggle room, depending on her final weight after the cage, and all.
i think i want to do some b heads with port/polish/valve job, and cams.
looking for advice.
the car will NEVER see forced induction
it may, down the road get a built short block with higher CR, and stroker crank (+/- on this),
maybe never, if the heads/cam/intake get me where i need.
what do i need to get and do. to reach my goal
i am looking to maximize are under the curves, not for peak numbers.
i want a long flat torque curve, and to be able to use as much rpm band as possible.
this will be a strictly road-course racing car.
does it matter what 4v head i start with???
cobra vs Lincoln Mark VII, vs (do navigators come with some DOHC / cobra-compatible heads?)
how much of a P/P? i don't want to go too wild, and take a step backwards, considering i wont be adding FI
should i even port em at all, and just do cams?
oh yeah, where are we right are now:
stock power plant with :
LTHs, off road h pipe, and flomasters with dumps/turn downs
smog pump/egr delete,
a K&N filter,
and steeda 10% UDPs, and an aluminum DS,
yielded a disappointing 287/283.
not sure how much he left on the table, if any
thanks,
doc
i DID just read the sticky, about heads
wow,
a lot of info, and things to consider.
in the 1st part of my post, i indicate i had been planning on staying with B heads, since that is what the car has,
and by doing so i dont have to switch from a return to a returnless system (or di i have that backwards?)
now, having read the sticky,
i am even more confused as to what will be the easiest/cheapest to reach my hp/tq goals, naturally aspirated,
doc
Last edited by doc stang; 03-08-2010 at 12:50 AM.
#4
Honestly, it's going to be difficult to reach those numbers AND have a flat curve. Those numbers are attainable with head work and some large cams, but low end torque will suffer...
Just throw an ls1 with bolt-ons, and you'll be right where you want to be, with no headwork! lol
Just throw an ls1 with bolt-ons, and you'll be right where you want to be, with no headwork! lol
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