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#1
04-25-2024, 08:56 PM
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326 with 092 Heads?
I am buying a 67 LeMans with a rebuilt 326 and it has 092 389 heads installed. Was this a good idea to improve hp to a 326?
Thanks for any input Joe
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#2
04-26-2024, 05:57 AM
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Since your looking for 1 hp per cid then I need to first ask what rear gears the car has out back, what trans ( hopefully not a TB300) and what type of driving will the car be used for 85% of the time?
What can tell you is with what those heads flow in stock form you will need to run a Cam of at least .525" lift to reach your 326 hp goal, and getting that .525" lift might come at the price of the Cam having too much duration to make for having a tolerable idle and a happy around town and highway car.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! Last edited by steve25; 04-26-2024 at 06:06 AM. |
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#3
04-26-2024, 08:49 AM
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Unless they did some head milling it probably lost a half of point of compression against the stock 326 head. I think a 389 has about an 8cc bigger head chamber. But I am just going off of published numbers, sometimes they are wrong. But if it gains a bit of head flow, and probably lost some compression. It likely didn’t make much difference either way in performance.
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#4
04-26-2024, 09:16 AM
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If the motor was bored .030” over when it was rebuilt then that ate up 3.32 CCs of that bigger chamber size the 092s may have which would leave not even a 1/4 point of compression difference either way.
Call it a mute point is how I would look at it.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#5
04-26-2024, 09:40 AM
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If there was a difference both head combos would still be .030” over, so the difference really stays the same. But that cc number is something I recall seeing from something from HOracing. Which I am not sure was even correct for that year.
Last edited by Jay S; 04-26-2024 at 10:35 AM. |
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