What boost level do you start using Meth?
What boost level do you start using Meth? I'm going to be installing a turbo on a stock bottom end 00 TA. At the moment I have a set of milled 243's that probably put me at 11.1 comp. I have a set of stock 317's I figured I'd put on for peace of mind. Probably going to put a Tick stage 1 turbo cam in it to make it more efficient. Not sure if I can run 10lbs of boost or not safely. Is it pointless to run meth if my compression is down around 9.5-9.6 and I'm at 10lbs or less of boost? Thank for any info.
Depends on the setup, its not required but generally spraying some M1 can help lower IAT's and run more timing then pump gas alone. Plus its a nice backup if you get a bad batch of fuel from the pump.
Also depends on what your psi relates to in CFM. PSI alone is useless since 10 psi on a ebay GT45 is completely different then a Precision Pro-Mod 88.
Also depends on what your psi relates to in CFM. PSI alone is useless since 10 psi on a ebay GT45 is completely different then a Precision Pro-Mod 88.
Started using it around 8psi. If you're asking when I have it coming on its comes on around 4psi and flows more as the power increase. Total of 11.3psii on my setup. I run 100% and love it because it cools and adds power. I wouldn't run a FI setup without it save for E85.
9 Second Club
Joined: Nov 2003
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From: Norn Iron
Dont get confused with needing and wanting.
Many builds dont need it, but people use it because they will yield benefits from doing so. But it still isnt a case of needing it.
Really up to you whether it's pointless or not. The engine will more than likely see gains fro using it and tuning for it's use if used correctly vs none at all.
But with a low boost setup, just dont go nuts dumping loads in.
If you live somewhere where ambient temps are quite high, then it can make sense to use meth.
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I really like my alky control kit from Julio in Florida. You can run 100% meth which a lot of the kits done allow. It has a nice progressive controller and awesome tech support. Julio will talk your ear off about racing, great guy.
All you guys using meth kits might want to read this: http://www.performancetrucks.net/for...w-test-525874/
I have mine come on at about 4psi. 2x 14gph nozzles with 82mm turbo.
I have mine come on at about 4psi. 2x 14gph nozzles with 82mm turbo.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
All you guys using meth kits might want to read this: http://www.performancetrucks.net/for...w-test-525874/
I have mine come on at about 4psi. 2x 14gph nozzles with 82mm turbo.
I have mine come on at about 4psi. 2x 14gph nozzles with 82mm turbo.
You're stating flow figures and intake pressures.
But where are these coming from ?
Are you actually measuring flow or calculating ?
Intake pressure, are you spraying the nozzles into a pressurised chamber for the test ? so tested in real world conditions ? Or just into open air at atmospheric pressure ?
I read where Aquamist tested the typical "small" pump all the kits ( ie almost every meth kit uses the same small 160-200psi pump whether Aquatec or Shurflo ) use with various nozzles, and even at moderately sized nozzles those 160-200psi pumps were barely struggling to achieve 80psi or so...and that's not taking into account boost pressure, which could see actual pressure to inject liquid down to 50-60psi depending on boost.
As for the last comment about pre-turbine injection. All reports state this will help compressor efficiency and with suitable nozzle and placement there is no risk whatsoever to the compressor.
There is a very long discussion on the Aquamist form about this.
One thing I'm not picking up from your tests.
You're stating flow figures and intake pressures.
But where are these coming from ?
Are you actually measuring flow or calculating ?
Intake pressure, are you spraying the nozzles into a pressurised chamber for the test ? so tested in real world conditions ? Or just into open air at atmospheric pressure ?
I read where Aquamist tested the typical "small" pump all the kits ( ie almost every meth kit uses the same small 160-200psi pump whether Aquatec or Shurflo ) use with various nozzles, and even at moderately sized nozzles those 160-200psi pumps were barely struggling to achieve 80psi or so...and that's not taking into account boost pressure, which could see actual pressure to inject liquid down to 50-60psi depending on boost.
As for the last comment about pre-turbine injection. All reports state this will help compressor efficiency and with suitable nozzle and placement there is no risk whatsoever to the compressor.
There is a very long discussion on the Aquamist form about this.
You're stating flow figures and intake pressures.
But where are these coming from ?
Are you actually measuring flow or calculating ?
Intake pressure, are you spraying the nozzles into a pressurised chamber for the test ? so tested in real world conditions ? Or just into open air at atmospheric pressure ?
I read where Aquamist tested the typical "small" pump all the kits ( ie almost every meth kit uses the same small 160-200psi pump whether Aquatec or Shurflo ) use with various nozzles, and even at moderately sized nozzles those 160-200psi pumps were barely struggling to achieve 80psi or so...and that's not taking into account boost pressure, which could see actual pressure to inject liquid down to 50-60psi depending on boost.
As for the last comment about pre-turbine injection. All reports state this will help compressor efficiency and with suitable nozzle and placement there is no risk whatsoever to the compressor.
There is a very long discussion on the Aquamist form about this.
I accounted for sparying into a pressurized chamber by subtracting out the boost pressure from the nozzle pressure. If you look in the spreadsheet you see there are several tables of data, the "corrected pressure across nozzle" is subtracting out the boost. Secondly spraying atomized fuel into a pressurized chamber is generally a bad idea
What I essentially created was a pump flow map. Nobody seems to want to publish theirs so I made my own.
My main point of linking to the thread I made was to really double check the voltage the pump is getting so you can be sure its doing what its supposed to.