Im about to rebuild my 96 1.8 need help!
#1
Im about to rebuild my 96 1.8 need help!
As the title says Im rebuilding a 1.8 in my 96 miata. I will most likley buy a rebuild kit from FM. What I want to know is I would like to get a little better performance out of the rebuild. I do not have the money right now for a turbo. So I was wondering what I can do to get the compression up like decking the head if I did that what would the compression ratio go up to and
would there be any real preformance gain? Another words is the cost benefit worth it? Also was thinking about haveing the head ported and polished and a good valve job done. So again is there any real preformance gains to be had buy increasing compression and doing the port and polish? Any help or advice would be great or if anyone knows of someone who has already done it that I could talk to would be great.
would there be any real preformance gain? Another words is the cost benefit worth it? Also was thinking about haveing the head ported and polished and a good valve job done. So again is there any real preformance gains to be had buy increasing compression and doing the port and polish? Any help or advice would be great or if anyone knows of someone who has already done it that I could talk to would be great.
#2
Hmmm. Am I to assume you will be reusing your stock pistons?
You have to honestly ask yourself what kind of mods you know you will do later down the road. Also what kind of budget you have.
If you have not already invested in any other mods, than I would say do not do any port work. You will gain more performance with say an exhaust system and light flywheel than you would with a ported and decked head and no other mods. The compression will not go up that much, and it is better to do more exotic mods when you have already done the other basic mods.
You have to honestly ask yourself what kind of mods you know you will do later down the road. Also what kind of budget you have.
If you have not already invested in any other mods, than I would say do not do any port work. You will gain more performance with say an exhaust system and light flywheel than you would with a ported and decked head and no other mods. The compression will not go up that much, and it is better to do more exotic mods when you have already done the other basic mods.
#4
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Honestly if you are going into the engine for whatever reason, you need to throw in a cheap set of $300 forged rods. The rods are the weak link of the BP motor, so replacing them will give you a lot of future security.
#9
As the title says Im rebuilding a 1.8 in my 96 miata. I will most likley buy a rebuild kit from FM. What I want to know is I would like to get a little better performance out of the rebuild. I do not have the money right now for a turbo. So I was wondering what I can do to get the compression up like decking the head if I did that what would the compression ratio go up to and
would there be any real preformance gain? Another words is the cost benefit worth it? Also was thinking about haveing the head ported and polished and a good valve job done. So again is there any real preformance gains to be had buy increasing compression and doing the port and polish? Any help or advice would be great or if anyone knows of someone who has already done it that I could talk to would be great.
would there be any real preformance gain? Another words is the cost benefit worth it? Also was thinking about haveing the head ported and polished and a good valve job done. So again is there any real preformance gains to be had buy increasing compression and doing the port and polish? Any help or advice would be great or if anyone knows of someone who has already done it that I could talk to would be great.
Don't look at porting the head for more power but also look at it to help you build a better power band and a more efficient engine. We don't believe your engine should struggle to breath. in allowing your engine to struggle breathing.
#11
so the OP has not ruled out a move to a turbo in the future
I am just suggesting careful thinking today about mods adopted now that will not have to be changed later; the flywheel being one [even FM cautions about/against the lightest flywheel for turbo/SC applications]
another is the compression ratio if after market pistons are installed [forgoing high CR pistons if forced induction is in the future]
so we are back to the original question for the OP
is this an engine that will always be normally aspired?
or is forced induction the final end point?
#12
Sounds like you are speculating and not talking with experience. Y8s as well as many others here have light flywheels on their turbo cars, and never experienced this problem.
If anything, the minimal amount of rpm drop will be offset by the gains in a light flywheel's ability to rev faster, resulting in proper exhaust gas pumping you speak of.
Put one on for yourself. I have my doubts you would remove it once you saw the benefits.
#13
Are you the worlds slowest shifter?
Sounds like you are speculating and not talking with experience. Y8s as well as many others here have light flywheels on their turbo cars, and never experienced this problem.
If anything, the minimal amount of rpm drop will be offset by the gains in a light flywheel's ability to rev faster, resulting in proper exhaust gas pumping you speak of.
Put one on for yourself. I have my doubts you would remove it once you saw the benefits.
Sounds like you are speculating and not talking with experience. Y8s as well as many others here have light flywheels on their turbo cars, and never experienced this problem.
If anything, the minimal amount of rpm drop will be offset by the gains in a light flywheel's ability to rev faster, resulting in proper exhaust gas pumping you speak of.
Put one on for yourself. I have my doubts you would remove it once you saw the benefits.
and I have installed a lighter flywheel, and thus have the experience
but this thread is not about me, or you, or y8, or etal;
instead the OP asked for input about an engine rebuild
I offer my input - think hard about installing the lightest flywheel and think hard about raising the compression ratio IF a turbo is the end point
nugh said, have a good day
#14
I should not have said the comment about the worlds slowest shifter. Sorry.
The FM happy meal is hardly considered a very light flywheel so no, you do not have experience with one. Do not take everything that FM says as gospel.
Lighter flywheels do take more practice and skill to drive gracefully, but in no way would it ever be slower regardless of the induction methods.
The FM happy meal is hardly considered a very light flywheel so no, you do not have experience with one. Do not take everything that FM says as gospel.
Lighter flywheels do take more practice and skill to drive gracefully, but in no way would it ever be slower regardless of the induction methods.
#16
Thank you all. I will be using the car for track days and driving back and forth to work sometimes. I will not be adding forced induction. Eventually I will be doing a motor swap. But that will be way down the road. I really just want a fresh motor that has a little more umph with as little money as I can. I also have a 2011 Mustang GT that I am doing FI so I dont have much money to throw at the miata.
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