Street port for LS1 heads and cam swap??
#1
Street port for LS1 heads and cam swap??
I have a couple questions concerning a street port for stock LS1 heads. I have a reputable machine shop that said they'd do a street port for about 300 bucks. Just match the heads to the gasket and clean out the bowls. Has anyone done this? Is it worth it. The engine guy said about 40-50 horse. For 300 bucks, that's pretty cheap. But is it real? What kind of power would you expect from this? Also, getting ready to swap a cam in a buddies 99 Z28. I have the guide from LS1how-to.com. Did I read it correctly when it says to just pull out the old cam and put in the new one? What about lining it up correctly....or will it only fit in one way? Just want to make sure we do this right the first time. Any input is greatly appreciated. Thanks.
#4
Originally Posted by Brian Tooley
I responded with a "ditto" to Tony Mamo's post, but then he pulled it off.
Not going to happen, 20 horse maybe.
Not going to happen, 20 horse maybe.
#5
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what about sanding and polishing the intake and exhaust ports yourself (home porting the heads), if the cc volume is a little different would this be bad? I think the bowl would be an issue, but not as much for the intake runners, so what about just leaving the bowl and doing the intake/exhaust
If you could sand things down and polish it, wouldnt it be better overall even if its not as percise as a professional port/polish/matching
If you could sand things down and polish it, wouldnt it be better overall even if its not as percise as a professional port/polish/matching
#6
"Smoothing" port walls does very little (if any) help in providing extra airflow. It's purely cosmetic for the most part....try it on a flowbench and you will be surprised at the outcome...little or no change. Also, if your "heavyhanded" on the short side or any other sensitive area, you take the chance of losing flow if by accident you alter the correct shape, create a flatspot, lip, etc....
I just had a set of 205's here on our flow equipment that were claimed to have been improved by a local shop....This guy literally just sandrolled all the ports, barely removing all the CNC marks, charged the customer $1000 for his trouble, and gave him back a head that flows identical to a 205 out of the box....The good news is at least he didnt charge him a grand and give him a LOWER flowing piece than what he brought in...that would have really sucked.
Buyer beware folks....
I just had a set of 205's here on our flow equipment that were claimed to have been improved by a local shop....This guy literally just sandrolled all the ports, barely removing all the CNC marks, charged the customer $1000 for his trouble, and gave him back a head that flows identical to a 205 out of the box....The good news is at least he didnt charge him a grand and give him a LOWER flowing piece than what he brought in...that would have really sucked.
Buyer beware folks....
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Originally Posted by Tony Mamo @ AFR
"Smoothing" port walls does very little (if any) help in providing extra airflow. It's purely cosmetic for the most part....try it on a flowbench and you will be surprised at the outcome...little or no change. Also, if your "heavyhanded" on the short side or any other sensitive area, you take the chance of losing flow if by accident you alter the correct shape, create a flatspot, lip, etc....
I just had a set of 205's here on our flow equipment that were claimed to have been improved by a local shop....This guy literally just sandrolled all the ports, barely removing all the CNC marks, charged the customer $1000 for his trouble, and gave him back a head that flows identical to a 205 out of the box....The good news is at least he didnt charge him a grand and give him a LOWER flowing piece than what he brought in...that would have really sucked.
Buyer beware folks....
I just had a set of 205's here on our flow equipment that were claimed to have been improved by a local shop....This guy literally just sandrolled all the ports, barely removing all the CNC marks, charged the customer $1000 for his trouble, and gave him back a head that flows identical to a 205 out of the box....The good news is at least he didnt charge him a grand and give him a LOWER flowing piece than what he brought in...that would have really sucked.
Buyer beware folks....
Brandon
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Originally Posted by ddnspider
what about companies like MTI who CNC their heads then hand finish them,i know they're expensive, but other companies are starting to follow suit,does the hand finishing help?
Brandon