F22B2 to F22B1 head compression increase?
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F22B2 to F22B1 head compression increase?
I have been told that putting a vtec head on a non vtec block increases compression. I know this to be true on the D series but is it accurate on the F series? I did a search all I turned up was how to write in the vtec solenoid and how to do the swap.
#2
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Re: F22B2 to F22B1 head compression increase?
I'm pretty sure that the F22B2 and F22B1 heads have the same combustion chamber volume. So unless you mill the head, simply swapping a VTEC head on a non V block will not raise the compression enough to even notice.
The big difference between the two heads, aside from VTEC, is that the B1 has 2mm larger intake valves.
F22B1 = 34mm Int. & 29mm Exh.
F22B2 = 32mm Int. & 29mm Exh.
The big difference between the two heads, aside from VTEC, is that the B1 has 2mm larger intake valves.
F22B1 = 34mm Int. & 29mm Exh.
F22B2 = 32mm Int. & 29mm Exh.
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Re: F22B2 to F22B1 head compression increase?
Ok. That's kind of what I was thinking. How much do you think I can mill off of the head before running into problems with the timing belt slipping?
#5
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Re: F22B2 to F22B1 head compression increase?
the timing belt wont slip. A machinist will be able to determine the thickness you can mill. You wont notice much in just adding compression as it will be minimal. The issue becomes valve/piston clearance. What exactly are you trying to accomplish?
#6
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Re: F22B2 to F22B1 head compression increase?
Milling the head really isn't the best way to increase compression anyway. A set of higher compression pistons would be much more reliable and really not that expensive these days.
What bolts are you referring to?
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Re: F22B2 to F22B1 head compression increase?
Trying to bring compression back up.. I still need to do a leak down test. Just been to busy and honestly. Lazy. 250,xxx miles I should just re build the engine. She's been goods to me. No oil burning either Orr blow by. Just put a head from a 95 on it. I was told that the 95 has bigger combustion chamber's than the 97 head.
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#8
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Re: F22B2 to F22B1 head compression increase?
Trying to bring compression back up.. I still need to do a leak down test. Just been to busy and honestly. Lazy. 250,xxx miles I should just re build the engine. She's been goods to me. No oil burning either Orr blow by. Just put a head from a 95 on it. I was told that the 95 has bigger combustion chamber's than the 97 head.
#10
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Re: F22B2 to F22B1 head compression increase?
Ghost is correct. The combustion chambers are the same volume, but the B1 has the larger valves. Whether or not this is of benefit with the factory camshaft profile of both engines is debatable. More than likely, it's not. The B1 camshaft is more aggressive(barely) and has a better exhaust manifold. Mainly where the gains are from the B2 to B1, although the B1 head flows MUCH better on both the intake and exhaust sides due to port differences. The B2 has the worst head of the F-series family in terms of flow and potential, but it's really not bad for a stock head and seems like it keeps a pretty decent velocity through the ports. The smaller valve size allows for good torque production, but hinders it's air delivery at higher RPM's. The F22B6 from the Odyssey is the same engine as the F22B2, although it has a different ECU/tuning and the camshaft from the F22A6. It's rated only 5hp less than the F22B1, if that gives you any indication of the 'real' performance advantage of the F22B1... it really isn't much. The F23A1 is a much better option. Lots more torque, the best flowing(as-cast) cylinder head, and a much better intake manifold design.
Can you please stop posting incorrect information. You're really not helping anything.
Can you please stop posting incorrect information. You're really not helping anything.
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