View Poll Results: Whats the best CR to have for 15-22 pounds of boost?
11:1
8
2.87%
10.5:1
4
1.43%
10:1
20
7.17%
9.5:1
59
21.15%
9:1
67
24.01%
8.5:1
95
34.05%
8:1
26
9.32%
Voters: 279. You may not vote on this poll
CR for big boost...
Who said both were on the raged edge? This is assuming that both cars (both the high CR one, and the low CR one) is properly setup with a good tune, and fuel system, even with supporting mods needed like intercoolers, and even race gas or methanol injection. The low CR will keep it further away from detonation, every time, period. That is why it will last longer, and take more. High CR is not meant for high boost applications. Look at any high dollar fast FI car in the FI section like MighTyMouse (article in GMHTP mag), or even NastyNate. Both are running extremly fast FI cars with lots of boost, but they are not at a high CR.
As for the poll, if you are saying just because a lot of people voted the way you didn't, does not mean they are all wrong. It just means that the majority voted that way. If you are saying most people on here don't know what they are talking about, then why are we having this conversation in the first place? Because if that is a given, then no ones opinion matters.
As for the poll, if you are saying just because a lot of people voted the way you didn't, does not mean they are all wrong. It just means that the majority voted that way. If you are saying most people on here don't know what they are talking about, then why are we having this conversation in the first place? Because if that is a given, then no ones opinion matters.
oh, and since we are looking at the poll for stats. then you will see that more people collectively voted for higher than 8.5:1 comp than lower. so in your words "the majority" has voted higher 
i haven't even looked at the poll to see what people have voted because i really don't put stock in the popular vote, i like to know the facts instead. we can agree to disagree, i have no problem with that. but to say the low comp set-up will last longer just because it's low comp makes no sense. Now if your saying if both set-ups had to run 20psi and 24* timing on 91 fuel then yes low comp will detonate less. But if both are tuned for zero detonation then both will live.
oh, and since we are looking at the poll for stats. then you will see that more people collectively voted for higher than 8.5:1 comp than lower. so in your words "the majority" has voted higher
oh, and since we are looking at the poll for stats. then you will see that more people collectively voted for higher than 8.5:1 comp than lower. so in your words "the majority" has voted higher
Im going to bump this bad girl back up TTT. Im building a pure C16/Import setup. 415 cube LS3 with a single PT88.
I chose 10.5-10.7:1. It makes 500/500 on motor, before the turbo.
I chose 10.5-10.7:1. It makes 500/500 on motor, before the turbo.
Back to original post...
I haven't read through all 10 pages, but there is also a very important variable left out (unless it's inbetween pages 2-9). How about the compressor efficiency of whatever forced induction your using? Not to knock the original post, but you asked a very vague question, you asked what would be ideal. Again I go back to compressor map. Those IAT's start climbing your sure as heck gonna have detonation. Which would you rather have "***"uming all componets the same:
10:1, C16 race gas (as you said race fuel), tuned to 0 detonation, and running 22psi.
A P600B running 22psi (as Procharger says it'll go to 24)
-or-
A D1SC running 22psi (again they say it'll go to 32)
You think a P600B will be as efficient as a D1 at those levels?
All in all this post was just to point out that there is more in choosing compression based on psi.
K, I let you guys get back to it....
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