Thread: Opinions on heads.

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Not at all. If you want to go a tad bigger, put a slightly larger "Stick" in it like 545 to 555 lift on intake. The 781 is a respectable street head if you can find a set of 990's go with that and your cam combo you chose is gonna do it better. I'm trying give a better perspective on the heads you have. By all means, they're not bad at all. It's just you can stay within budget with a good pair of iron heads like the 990's and get a touch more for your buck. I never want to spend your money like it was mine. Over camming can kill what you're trying to do as much as under camming. Just trying to fill in the spaces of good combos. By the way what cam manufacturer were you referring to when you originally posted? Depending on their grind it could still work well.

Originally Posted by nitrowarrior

Not at all. If you want to go a tad bigger, put a slightly larger "Stick" in it like 545 to 555 lift on intake. The 781 is a respectable street head if you can find a set of 990's go with that and your cam combo you chose is gonna do it better. I'm trying give a better perspective on the heads you have. By all means, they're not bad at all. It's just you can stay within budget with a good pair of iron heads like the 990's and get a touch more for your buck. I never want to spend your money like it was mine. Over camming can kill what you're trying to do as much as under camming. Just trying to fill in the spaces of good combos. By the way what cam manufacturer were you referring to when you originally posted? Depending on their grind it could still work well.

With a port volume of around 320 cc's I would not even look at a set of 990's un-less you have your 454 going to 7,000 rpm's.
A set of 781's with 2.19/1.88 valves is all you need in a 5,500 to 6,000 rpm engine.

I stumbled across this yesterday ...................

990 heads with 25 passes on them for $75?

sfbay.craigslist.org/pen/pts/311895525.html

Kitz

Originally Posted by nitrowarrior

Not at all. If you want to go a tad bigger, put a slightly larger "Stick" in it like 545 to 555 lift on intake. The 781 is a respectable street head if you can find a set of 990's go with that and your cam combo you chose is gonna do it better. I'm trying give a better perspective on the heads you have. By all means, they're not bad at all. It's just you can stay within budget with a good pair of iron heads like the 990's and get a touch more for your buck. I never want to spend your money like it was mine. Over camming can kill what you're trying to do as much as under camming. Just trying to fill in the spaces of good combos. By the way what cam manufacturer were you referring to when you originally posted? Depending on their grind it could still work well.

Cam I was planning on was recomended to me by UD Harlod who developed the Lunati VooDoo cam pt #60204. Spec to refresh are : Adv Dur 276/284; @ 050" lift 233/241; .554/.572 lift; 110 LSA. According to Lunati need 10:1 compression which is where I should be at with 119cc heads and trw domed pistons, and also stated needs 2800-3000 stall which I was planning on going with 3000 stall and 3.73 Gears.

Actually to add to this....... Ud Harold actually initially recomended a Lunati 402A3LUN which is a solid cam at : 276/284 @ .020; 243/251 @ .050; .586/.600 on 110 LSA.

He recomended this because he stated he loves this cam and it is what he considers to be "The Classic Big Block Cam"..I just decided to go with hydraulic flat tappet cause its all I have expereince with.