worth it to build a 1.6L
A wise man once told me you could build a 1.6 just as strong as a 1.8 but they have there own ad/disadvantages. I know I will build my 1.6 when I get to that point. Only because I have 1.6's available to me. Many will say do the 1.8 because you can get the 99 head which flows better and such plus the 1.8 puts down a little more power. In all honesty I think it's how you build it that matters.
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I really suppose it is up to you. Either way, It is rare to see a 400hp Miata (which is beyond my comprehension) and both motors will get you there with the proper turbo, build, engine management etc. In the end it really doesn't matter because that 400hp mark is mostly a dream everyone on this forum and with a 1.6 or 1.8 Miata. Build what you want.
But then again some folks don't build for power. I have many reasons for building my M62 1.6. If I just wanted power I could get 400hp out of my motor with the correct turbo.
To the OP, to answer your question if you are goaling for 300 then go with either motor. Either way both motors kick *** because they have iron blocks, stock low compression pistons, good cams for boosting, oil squirters, and will run until you car rusts away or until california goes under water.
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Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
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1.6l rev higher stock than the 1.8l. The slight increase in displacement isn't gonna make it spool a bigger turbo much faster.
You'll be able to spin a 1.6l higher to make up for it. I prefer to spin 8k rpm, and make full boost around 4.5-5k rpm. Even with a GT2871R (good for 400-450whp) that should be easy to do. If you are going for over 500whp, get a LS*, cause 500whp (LS7 + mods) NA > FI 4cyl running tons of boost.
Savington, I am guessing you are running a 1.8l, and your sig says you have a 2871. At what RPM do you make full boost?
You'll be able to spin a 1.6l higher to make up for it. I prefer to spin 8k rpm, and make full boost around 4.5-5k rpm. Even with a GT2871R (good for 400-450whp) that should be easy to do. If you are going for over 500whp, get a LS*, cause 500whp (LS7 + mods) NA > FI 4cyl running tons of boost.
Savington, I am guessing you are running a 1.8l, and your sig says you have a 2871. At what RPM do you make full boost?
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The justifications that people are providing for building a 1.6L seem to come from people who have not made high horse power with a 1.6L. It seems to me that what you guys think is that if a Miata can get X HP then it is the same as another miata with X HP. Overall HP should not cripple your power band. Like I said before, the relationship is directly inverse between the size of the turbo needed and the engine size. Getting a 1.8L will not only give you more torque in the low end, but require a smaller turbo. This will give you a much closer to linear power band.
I could strap on a damn GT3076R to a 1.6L and make an ungodly amount of HP, but it will be so unusable that it won't matter. I undertand that this is an extreme, but it just helps prove the point.
Also, dont' start feeding bullshit into this post about driver skill making it faster, because that is not what this was about. The question was simply whether or not he should build a 1.6L or 1.8L. Keep it that way.
It seems to me that too many people talking out of emotion rather than logic on this.
I could strap on a damn GT3076R to a 1.6L and make an ungodly amount of HP, but it will be so unusable that it won't matter. I undertand that this is an extreme, but it just helps prove the point.
Also, dont' start feeding bullshit into this post about driver skill making it faster, because that is not what this was about. The question was simply whether or not he should build a 1.6L or 1.8L. Keep it that way.
It seems to me that too many people talking out of emotion rather than logic on this.
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FM has a direct comparison betwene a 1.6L and a 1.8L here with same specs other than engine.
http://www.flyinmiata.com/tech/dyno_...s_1.8_FMII.pdf
http://www.flyinmiata.com/tech/dyno_...s_1.8_FMII.pdf
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The justifications that people are providing for building a 1.6L seem to come from people who have not made high horse power with a 1.6L. It seems to me that what you guys think is that if a Miata can get X HP then it is the same as another miata with X HP. Overall HP should not cripple your power band. Like I said before, the relationship is directly inverse between the size of the turbo needed and the engine size. Getting a 1.8L will not only give you more torque in the low end, but require a smaller turbo. This will give you a much closer to linear power band.
Also, dont' start feeding bullshit into this post about driver skill making it faster, because that is not what this was about. The question was simply whether or not he should build a 1.6L or 1.8L. Keep it that way.
Also, dont' start feeding bullshit into this post about driver skill making it faster, because that is not what this was about. The question was simply whether or not he should build a 1.6L or 1.8L. Keep it that way.
Last edited by BracedEunos; Jul 29, 2009 at 03:59 PM.
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Not many corners would require letting the engine go below 5k rpm. And the whole point of full boost at 5k is to help with TRACTION on the exit of slower corners. Sorry, but spinning the tires out of a corner isn't the fastest way to do it, unless you like drifting.
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The justifications that people are providing for building a 1.6L seem to come from people who have not made high horse power with a 1.6L. It seems to me that what you guys think is that if a Miata can get X HP then it is the same as another miata with X HP. Overall HP should not cripple your power band. Like I said before, the relationship is directly inverse between the size of the turbo needed and the engine size. Getting a 1.8L will not only give you more torque in the low end, but require a smaller turbo. This will give you a much closer to linear power band.
I could strap on a damn GT3076R to a 1.6L and make an ungodly amount of HP, but it will be so unusable that it won't matter. I undertand that this is an extreme, but it just helps prove the point.
Also, dont' start feeding bullshit into this post about driver skill making it faster, because that is not what this was about. The question was simply whether or not he should build a 1.6L or 1.8L. Keep it that way.
It seems to me that too many people talking out of emotion rather than logic on this.
I could strap on a damn GT3076R to a 1.6L and make an ungodly amount of HP, but it will be so unusable that it won't matter. I undertand that this is an extreme, but it just helps prove the point.
Also, dont' start feeding bullshit into this post about driver skill making it faster, because that is not what this was about. The question was simply whether or not he should build a 1.6L or 1.8L. Keep it that way.
It seems to me that too many people talking out of emotion rather than logic on this.
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Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
um...I didn't have any problems with the loud pedal and 280wtq at 4000rpm at MSR.
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Wow.....just wow. You really are ******* stupid. I am not saying that because I have nothing else better to say. It is just that you can't argue rational thought with irrational people.
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