Machine Work
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Machine Work
I'm thinkin about getting my plenum, intake manifold, and heads ported and polished. And an angle job? My brother told me to that as well, what is that? Anyone know how much this might cost or how much gain i'll see. I'm gonna get an AFPR and maybe a crane cam. Thanks.
Nathan
Nathan
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WS6,
Frankly, unless you are doing the porting yourself, the cost of paying someone to do it doesn;t justify the gains you will get. By the time you pay the labor to regrind valves and/or install larger ones, open the valve bowls, resurface the heads, enlarge the port runners, and polish the chambers and exhaust ports, you would likely have spent nearly as much as you would for a new pair of replacement heads with better port designs to start with.
On the other hand, if you are not in a hurry and have all the equipment at your disposal, you can get some really good flows from factory heads with a little work. Paying someone else just isn't cost effective, since your horsepower gain/dollar will be negligible. You'll get far more "bang for buck" with a camshaft exchange.
The same is true for the plenum and intake base/runners. Paying someone else to do it can be costly for the gains. Then again, for about $100 you can get a good die grinder and burrs and do it yourself. If you have an air compressor, the cost would be considerably less for a die grinder. Try to avoid the Dremel tools. They are comparatively slow and underpowered for this kind of work, and typically use a 1/8" collet which severely limits your selection of tooling.
Until you have made some other engine modifications, an adjustable pressure regulator probably won't gain you any power.
Frankly, unless you are doing the porting yourself, the cost of paying someone to do it doesn;t justify the gains you will get. By the time you pay the labor to regrind valves and/or install larger ones, open the valve bowls, resurface the heads, enlarge the port runners, and polish the chambers and exhaust ports, you would likely have spent nearly as much as you would for a new pair of replacement heads with better port designs to start with.
On the other hand, if you are not in a hurry and have all the equipment at your disposal, you can get some really good flows from factory heads with a little work. Paying someone else just isn't cost effective, since your horsepower gain/dollar will be negligible. You'll get far more "bang for buck" with a camshaft exchange.
The same is true for the plenum and intake base/runners. Paying someone else to do it can be costly for the gains. Then again, for about $100 you can get a good die grinder and burrs and do it yourself. If you have an air compressor, the cost would be considerably less for a die grinder. Try to avoid the Dremel tools. They are comparatively slow and underpowered for this kind of work, and typically use a 1/8" collet which severely limits your selection of tooling.
Until you have made some other engine modifications, an adjustable pressure regulator probably won't gain you any power.
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Well, i dont have any of the tools or any knowledge to do it, lol. I was going to look into other heads but no one makes them for the 305. World Products makes some but they are $800 for the pair and only give an advertised gain of 30 hp, so its doubtfull that i'll see even that much. Would the cam alone be good enough, because i was going to get a new cam after the porting anyway. Damn 305, is there anyway to get a 305 into the low 13s without forced induction or N2O? My goal is a 13.0. Thats all i want.
Nathan
Nathan
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