Ported and polished head installed
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Joined: Oct 2000
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From: South of the pier, Huntington Beach, CA
The valves are lighter than stock and all the springs are Honda yellows (intake springs on intake and exhaust.) Honda makes a great spring. With the lighter valves and Ti retainers there should never be any question about the valves closing properly. I would estimate float would occur somewhere above 11,000 rpms. This is just MHO and not a proven fact.
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Joined: Feb 2001
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From: You wish
There is always room for improvement on an OEM head. Had Sideways been looking for more of a racing setup, the intake could have been opened up even more. However, this could have compromised idle/low end/emissions.
Based upon the flow gains, if the rest of the system can support it, we should see 8-10 hp, which would be quite good.
Not including install, you can probably expect to pay about as much for the headwork as you do for a Mugen header or exhaust. Also depends on what parts you get (stiffer springs, Ti retainers, bigger valves, etc.).
UL
Based upon the flow gains, if the rest of the system can support it, we should see 8-10 hp, which would be quite good.
Not including install, you can probably expect to pay about as much for the headwork as you do for a Mugen header or exhaust. Also depends on what parts you get (stiffer springs, Ti retainers, bigger valves, etc.).
UL
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Joined: Jun 2003
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From: Orlando
UL,
What would the idle be like if the intake was opened up alittle more? Would you still be able to run the AC or would the idle be to harsh for the AC compressor to run at idle?
Low end. This car really wasn't meant to run in the low end with a 9k rpm limit.
Where I live emissions isn't a problem. Thank goodness.
And the guesstimate on the price sounds good to me.
What would the idle be like if the intake was opened up alittle more? Would you still be able to run the AC or would the idle be to harsh for the AC compressor to run at idle?
Low end. This car really wasn't meant to run in the low end with a 9k rpm limit.
Where I live emissions isn't a problem. Thank goodness.
And the guesstimate on the price sounds good to me.
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Joined: Oct 2000
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From: Columbia, MD
UL,
Is it reasonably fair to say that the gains will translate directly to FI applications in the same amount? i.e., if it shows a 5% increase in rwhp NA, will it also generally show a 5% increase for FI?
I'm not sure if it would be worth $1k for 15-20 rwhp when you can turn up the boost another 0.1 bar and get roughly the same advantage, but it definitely sounds worth it for people looking to stay NA.
Is it reasonably fair to say that the gains will translate directly to FI applications in the same amount? i.e., if it shows a 5% increase in rwhp NA, will it also generally show a 5% increase for FI?
I'm not sure if it would be worth $1k for 15-20 rwhp when you can turn up the boost another 0.1 bar and get roughly the same advantage, but it definitely sounds worth it for people looking to stay NA.
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Joined: Feb 2001
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From: You wish
In the case of this head, the change in the ratio of intake/exhaust flow will likely help out an FI car even more.
The potential loss in low end is uncertain. We simply wouldn't know. I don't think it would significantly compromise idle, but it could make the car feel more sluggish. At some point to get enough top end flow you have to open up the port size which will kill velocity down low. Frankly, until someone has some big cams to go along with the head, I don't know if it would be worth it to go bigger on the ports.
You would be best served talking to Joe Alaniz as _he_ is the head expert, I'm just a guy who helped out.
UL
The potential loss in low end is uncertain. We simply wouldn't know. I don't think it would significantly compromise idle, but it could make the car feel more sluggish. At some point to get enough top end flow you have to open up the port size which will kill velocity down low. Frankly, until someone has some big cams to go along with the head, I don't know if it would be worth it to go bigger on the ports.
You would be best served talking to Joe Alaniz as _he_ is the head expert, I'm just a guy who helped out.
UL