Stage 4 991.1 vs 991.2 Turbo S with 93 Octane tune
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onfireTTS (02-23-2023)
02-23-2023, 08:59 PM
#17
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I have a Stage 4 991.1 with 68MM VTG Tial Turbo's and on California 91 am seeing around 635 WHP. I don't know what that compares to 991.2 - but it's more than stock 
(see my signature)
I find that I am still getting used to this power (have had it for 6 months) and the car is just like it was before for pottering around - but whoa - when you step on it. I havent done any dragy or timer stuff but Sam dyno'ed it after it was done. And it was about 90-95 degrees outside.
(see my signature)I find that I am still getting used to this power (have had it for 6 months) and the car is just like it was before for pottering around - but whoa - when you step on it. I havent done any dragy or timer stuff but Sam dyno'ed it after it was done. And it was about 90-95 degrees outside.
Last edited by rodsky; 02-23-2023 at 09:01 PM.
02-24-2023, 08:33 AM
#18
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I have a Stage 4 991.1 with 68MM VTG Tial Turbo's and on California 91 am seeing around 635 WHP. I don't know what that compares to 991.2 - but it's more than stock (see my signature)
I find that I am still getting used to this power (have had it for 6 months) and the car is just like it was before for pottering around - but whoa - when you step on it. I havent done any dragy or timer stuff but Sam dyno'ed it after it was done. And it was about 90-95 degrees outside.
(see my signature)I find that I am still getting used to this power (have had it for 6 months) and the car is just like it was before for pottering around - but whoa - when you step on it. I havent done any dragy or timer stuff but Sam dyno'ed it after it was done. And it was about 90-95 degrees outside.
Do you run catless?
Either way that is excellent.
02-24-2023, 03:11 PM
#19
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Just do meth and it will trap high 139-140 on stock turbos. If 9.9s low 10s is what you are after. You get good IAT's even in hot weather, and you always have good octane. And dealing with meth to me is much easier than dealing with race gas.
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Pb Pedis (02-24-2023)
02-24-2023, 03:23 PM
#21
02-24-2023, 03:44 PM
#22
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02-24-2023, 04:07 PM
#23
Personally, I'd rather not deal with meth or race gas. I've got easy access to E-85 at the pump and would rather go that route...
02-24-2023, 04:16 PM
#24
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Also, how often do you have to refill the meth?
Where do you buy meth at?
I know it is not recommended to use windshield washer fluid.
02-24-2023, 04:49 PM
#25
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I check mine before I go racing and will top it off, otherwise I never check it. The snow kits are progressive starts spraying at 10, goes full spray with more load. Regular driving even aggressive, like 90-100 on the turnpike, it barely uses any meth. Gauge also flashes if meth is low, from what I remember on stock turbos with whatever small nozzles probably like 15 plus pulls before the light would come on, I mean full pulls like 1/4 mile and 45-160 roll races.
Local speed shops or online, I get mine either from AIM or LRA in levittown, I think maybe 70 for a 5 gallon pail, it literally lasts forever.
No you use straight M1 meth.
02-24-2023, 06:48 PM
#26
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I think I still have 4 full cans after 13K miles of driving.
I don't drive hard too often or go to the track much, too much traffic around here but when I do make a few hard pulls over the course of a 120 mile cruise the meth level changes only a little.
Unless you're on boost all the time, just check it before you go out or to the track.
02-24-2023, 07:27 PM
#27
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Thread Starter
Yeah if you do a standalone and port injection sure. Stock fuel system is probably e30-e35ish max, you have to mix, I've done it on my bmw's, it works, mixing to me is still more annoying than just filling up my meth tank at home, you're still range limited. Every bmw 5-7k in started to miss and needed new DI injectors and thats with alternating running pump. I just had to replace them in my 991 since one was being slow, you're not going to replace just one, all 6 I think were like 2200ish plus labor. It still will be faster with meth, if you run out of meth, it will still drive perfect on the same tune if you stay out of boost. Other than the install, theres zero hassle, for most a full tank will last probably a month. I had the same inhibitions with meth prior, once you trap high 130's low 140's they all go away.
Car pulls timing and freaks out and you let out.
I check mine before I go racing and will top it off, otherwise I never check it. The snow kits are progressive starts spraying at 10, goes full spray with more load. Regular driving even aggressive, like 90-100 on the turnpike, it barely uses any meth. Gauge also flashes if meth is low, from what I remember on stock turbos with whatever small nozzles probably like 15 plus pulls before the light would come on, I mean full pulls like 1/4 mile and 45-160 roll races.
Local speed shops or online, I get mine either from AIM or LRA in levittown, I think maybe 70 for a 5 gallon pail, it literally lasts forever.
No you use straight M1 meth.
Car pulls timing and freaks out and you let out.
I check mine before I go racing and will top it off, otherwise I never check it. The snow kits are progressive starts spraying at 10, goes full spray with more load. Regular driving even aggressive, like 90-100 on the turnpike, it barely uses any meth. Gauge also flashes if meth is low, from what I remember on stock turbos with whatever small nozzles probably like 15 plus pulls before the light would come on, I mean full pulls like 1/4 mile and 45-160 roll races.
Local speed shops or online, I get mine either from AIM or LRA in levittown, I think maybe 70 for a 5 gallon pail, it literally lasts forever.
No you use straight M1 meth.
I bought like 5 5-gallon cans thinking it would use a lot.
I think I still have 4 full cans after 13K miles of driving.
I don't drive hard too often or go to the track much, too much traffic around here but when I do make a few hard pulls over the course of a 120 mile cruise the meth level changes only a little.
Unless you're on boost all the time, just check it before you go out or to the track.
I think I still have 4 full cans after 13K miles of driving.
I don't drive hard too often or go to the track much, too much traffic around here but when I do make a few hard pulls over the course of a 120 mile cruise the meth level changes only a little.
Unless you're on boost all the time, just check it before you go out or to the track.
02-25-2023, 10:16 AM
#30
Going with Meth is definitely a great bang for the buck. but if u go with 68mm Hybrids the car will pull much harder on top end and make more power on 93 pump only vs stock turbos with Meth.
the stock .1 turbos runs out of steam past 6k rpm.
the stock .1 turbos runs out of steam past 6k rpm.