I would like to use something a little higher than 8:4:1 compression. Pretty much for spool time. But I also know that in order to get the power that I want I need boost pressure around the low to mid 30's. I would like to run 9:1 maybe 9:5:1. Would I be able to tune to the same boost levels with this type of compression? Remeber on c16.
9:1compression
- Thread starter turbodriz
- Start date
Anything is possible... You're just going to need A LOT better tuning than with the 8.4:1 compression. I haven't personally done this myself, so maybe someone will chime in and give your question a concrete response.
What do you mean you need to run low to mid 30's?
So plug the 3000 pipe and drill a very small hole in the center of the plug. And you have your 30 psi, wastegate modifications needed of course.
So plug the 3000 pipe and drill a very small hole in the center of the plug. And you have your 30 psi, wastegate modifications needed of course.
turbodriz said:
yes up comption is good thing i run 9.3.1 and was push big boost now i am going even hihger
but if you run c16 then you can go higher then me if you pan to us3 just c16
well, I just came from the dyno shop.... You can't run over 14 psi on 9.0:1 compression apparently... So, you may wanna stick with lower CR...
that was on pump gas.... OF COURSE you can run 30-50 psi on high compression ratios with c16... I think 45 psi on 13.5:1 CR sounds great. Just make sure you get some L19 head studs and torque them to 1.3 million ft/lbs
You know I don't take funny shit well all the time. I put the post because I wanted some real help. And for all of you who don't know, I've seen 25psi on flattop 10:0:1 pistons. So please supra community I am in middle of a serious build and I would appreciate serioius inqiures only. Save the small talk for someone is not serious:3d_frown: I would love to run 9:0:1 compression on my built motor on c16 at 30plus psi. I see that Genna is running 9:5:1 pistons in his motor. In N.y we hace 100octane at the pump to.
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turbodriz said:
If you've seen 25 psi on 10:1, then I don't understand why you needed to ask the question. If you're bothered by the non serious talk then you should have given more serious information, besides your question was answered by a few people already.
The issue is, as it is with everyone else who poses a question like this, that no one knows exactly what you are asking. Psi is not an airflow rating and therefore means nothing when it comes to power. There are turbos that will give you 600 hp at 30psi and then there are those that will make 800, another 1000 all very different situations. Of course you can run high boost with high compression with proper fuel AND proper tuning, but in order to give more specific answers than you have to provide more information. If you were trying to find the limits of c16 with base timing then yes, you would find your limit at a lower boost if you were running higher compression, but unless you were trying to do it with a ct26, I wouldn't worry about it at 30psi. In your original post you basically asked a yes or no question, so what else do you want?
I am shooting for 800hp. What ever psi it takes to get me there is what it takes. The question still remains will this be safe in the mid 30 psi range. Its obvious that we are talking about a turbo that is effective in this boost range.
Driz: Im running 9:1 pistons in my built motor... We're going for the same power... What kind of turbo are you running?
Fair enough turbodriz, I can appreciate the fact you take this seriously. That said, I'll throw something in to this thread.
If you want to run those boost levels safely, if safely is possible, have you considered water/methanol Injection. Chemical intercooling is a good way to keep the intake temps down and raise the boost levels. Just some food for thought.
If you want to run those boost levels safely, if safely is possible, have you considered water/methanol Injection. Chemical intercooling is a good way to keep the intake temps down and raise the boost levels. Just some food for thought.
i PLANE ONE RUNNING A GT40 TURBO. AND as far as alcohol water injection I don't know much about it.
i PLANE ONE RUNNING A GT40 TURBO. AND as far as alcohol water injection I don't know much about it. Most of the high compression turbo motors I been around are hondas and I'm pretty sure that intake temps are different just because we are working with two less cylinders.
Wow!
A motor is a motor is a motor......
Pack XX of air and fuel into it successfully light it off at the right time and it will make xx hp it doesn't really care how many cylinders it has or what configuration it's in V, W ,Inline 6 ,Inline 4 ,Boxer and so on.
Secret with 7M's is keeping it below the detonation threshold as 1 detonation at the sort of cylinder pressures you're talking WILL kill a 7M stone cold there and then.
I don't quite get this running high comp making the motor live right on the ragged edge when either more boost or a different trim Comp wheel will give as much HP increase if not more using lower safer comp.
I know people say it's for the spool...... well it does make the car a little more responsive off boost but when you get to that level 800+ low down drivability is the very least of your concerns.
Like others I didn't really take this thread all that seriously as you didn't seem to have done any homework on the 7M before posting.
A motor is a motor is a motor......
Pack XX of air and fuel into it successfully light it off at the right time and it will make xx hp it doesn't really care how many cylinders it has or what configuration it's in V, W ,Inline 6 ,Inline 4 ,Boxer and so on.
Secret with 7M's is keeping it below the detonation threshold as 1 detonation at the sort of cylinder pressures you're talking WILL kill a 7M stone cold there and then.
I don't quite get this running high comp making the motor live right on the ragged edge when either more boost or a different trim Comp wheel will give as much HP increase if not more using lower safer comp.
I know people say it's for the spool...... well it does make the car a little more responsive off boost but when you get to that level 800+ low down drivability is the very least of your concerns.
Like others I didn't really take this thread all that seriously as you didn't seem to have done any homework on the 7M before posting.
Do not be ignorant, the reason for joining the supra community is so that I can get educated on the car I know plenty about cars not much about a 7ms threshhold. And read what you write if a motor is a motor than there should'nt be much difference between a 7m and any other motor. No 2 Every one here knows that one of the draw backs on a 7m is that it does'nt like to rev. So for all you guys trying to make 1,ooo hp basically have to go head crazy to create the rev to make the turbo spool. Why go crazy over rev when you can yeild a higher compression in turn creating a quicker spool. We do have cast iron blocks right? Not for nothing I personally feel that what we have a superior to the jz motors we just have to figure how to make them work. One way of doing it is pushing it to the envelope. I have heard strange stories about the jz series motors like 900hp stock bottom. If this is true there is just more that our motor can do + todays technology.
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