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Old 12-14-2021, 04:18 PM   #1
MartinLe
 
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OCTANE LEVEL SWEET SPOT FOR CAMMED 2650 MAGGIE??

Hey Guys, I am putting the car in the shop later this week for the install of Jannettys Terminator Cam / 2650 Maggie package w/ +30 FICs. I am curious to find if there is a octane sweet spot for this build like there is for E (60%) with the JRE 125 Flex Fuel build. I can get 110 race fuel by the barrel, leaded and unleaded. What do you guys think. Thanks in advance.
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Old 12-14-2021, 05:26 PM   #2
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E60 is still the sweet spot.
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Old 12-14-2021, 05:42 PM   #3
MartinLe
 
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I am not going to be able to run ethanol - I'm staying with the stock LT4 fuel system with the JMS voltage booster and +30s the only upgrade. So, is there a particular octane content that is the most efficient? Should I shoot for a 100 octane tune, a 105 or 95? I guess what I'm asking is is the boost in horsepower linear to the octane level? Lastly, since I have no cats, should I run leaded gas?
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Old 12-14-2021, 07:23 PM   #4
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Quote:
Originally Posted by MartinLe View Post
I am not going to be able to run ethanol - I'm staying with the stock LT4 fuel system with the JMS voltage booster and +30s the only upgrade. So, is there a particular octane content that is the most efficient? Should I shoot for a 100 octane tune, a 105 or 95? I guess what I'm asking is is the boost in horsepower linear to the octane level? Lastly, since I have no cats, should I run leaded gas?
Personally I think I would have my “daily tune” on 93 octane and then maybe have a “hot tune” available to throw in for 100 octane at the track. I believe the higher the octane the more power but I don’t think the tune can “flex” like it does for e85 (but I’m no expert on that). I wouldn’t personally want to have to run 100 all the time, unless you are only running the car on the track. Just my preference and opinion.
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Old 12-14-2021, 07:57 PM   #5
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Quote:
Originally Posted by MartinLe View Post
I am not going to be able to run ethanol - I'm staying with the stock LT4 fuel system with the JMS voltage booster and +30s the only upgrade. So, is there a particular octane content that is the most efficient? Should I shoot for a 100 octane tune, a 105 or 95? I guess what I'm asking is is the boost in horsepower linear to the octane level? Lastly, since I have no cats, should I run leaded gas?
Are you going to run race gas all the time? Will you need to pulley swap if you want to run pump gas?

I know so many people who thought 100 octane was going to be okay.... but then they end up not driving their cars because of fuel limitations.
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Old 12-14-2021, 07:58 PM   #6
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95-97 using fuel additive put me into the 26-27° degree timing area easily/safely with my 2300.

I'm on 50/50 methanol right now and seems to have put me there plus some in equivalent octane, I can easily reach that level of timing without knock while on 93.
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Old 12-14-2021, 08:43 PM   #7
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Quote:
Originally Posted by MartinLe View Post
Hey Guys, I am putting the car in the shop later this week for the install of Jannettys Terminator Cam / 2650 Maggie package w/ +30 FICs. I am curious to find if there is a octane sweet spot for this build like there is for E (60%) with the JRE 125 Flex Fuel build. I can get 110 race fuel by the barrel, leaded and unleaded. What do you guys think. Thanks in advance.

Just run a 93 tune and a race gas tune, youll make about 40hp or so more depending on your build.


Your still going to need to watch the high side regardless.
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Old 12-14-2021, 08:57 PM   #8
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Mine is a Stage X. I decided to run 100 oct. all the time rather than E because it's so much simpler. There are two 100 pumps within 3 miles of my home. It's obvious I recommend 100.

You'll learn to put camaro1973 on your ignore list as I have. He's a troll.

Quote:
Originally Posted by MartinLe View Post
Hey Guys, I am putting the car in the shop later this week for the install of Jannettys Terminator Cam / 2650 Maggie package w/ +30 FICs. I am curious to find if there is a octane sweet spot for this build like there is for E (60%) with the JRE 125 Flex Fuel build. I can get 110 race fuel by the barrel, leaded and unleaded. What do you guys think. Thanks in advance.
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Last edited by JSH; 12-15-2021 at 02:11 PM.
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Old 12-14-2021, 09:03 PM   #9
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Quote:
Originally Posted by JSH View Post
Mine is a Stage X. I decided to run 100 oct. all the time rather than E because it's so much simpler. There are two 100 pumps within 3 miles of my home.

Hes not asking what you like to do. Hes asking what he should do.


And weren't you banned? Shame it wasn't permanent.
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815rwhp/760rwtq - 93 | 850rwhp/765rwrq - E40 SAE

Magnuson 2650 90mm upper w/13% lower (9.06)
CSP Big Boy Cam w/32% fuel lobe
Heads done by LME (Full new Valvetrain)
NW 103mm TB
Roto Fab Big Gulp
CSP 2" Headers w/Green GESI Gen 2 Cats
Borla 3" Full Cat Back w/ S-Type
Mighty Mouse Wild Catch Can
Custom Holley Low side Fuel system
Forced Inductions Interchiller w/2 gallon fender tank.
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Old 12-14-2021, 10:50 PM   #10
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I would not recommend running that high of an octane all the time on the street. 92-93 for DD purposes is the easiest and simplest way to go. Use 100 octane for a race tune.

My reasoning is that I don't think it's a good idea to always run something at it's max. That can lead to problems like a blown engine. A 93 octane flex tune is where you want to be safely for DD.
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Old 12-15-2021, 05:51 AM   #11
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Sure, higher Oct will net more timing and hp, however, unless you are only bringing the car out for some drag action and constantly running very low tire pressure on drag radials you will not make use of your 93 tune nonetheless a 100+ Oct tune. It is a shame you are not gonna do e since u have the injectors going in.

IMO, most run 100(or MS109 equivalent) as a high Oct tune to answer ur question.
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Old 12-15-2021, 09:58 AM   #12
MartinLe
 
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Quote:
Originally Posted by IneedAZ View Post
Sure, higher Oct will net more timing and hp, however, unless you are only bringing the car out for some drag action and constantly running very low tire pressure on drag radials you will not make use of your 93 tune nonetheless a 100+ Oct tune. It is a shame you are not gonna do e since u have the injectors going in.

IMO, most run 100(or MS109 equivalent) as a high Oct tune to answer ur question.
I was under the impression, that was my set up, I would not be able to run any ethanol.
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Old 12-15-2021, 10:08 AM   #13
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Me and a few others with maggie 2650 cars can't run ethanol unless it's a small blend like E30 maybe. Typically we run on 93 and then use race gas for race days/nights. It's worth anywhere from 50-100 whp.

We have just cam, lt4 system, and dsx low side. No injectors, but I'm not sure how much those would even help.
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Old 12-15-2021, 11:00 AM   #14
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Quote:
Originally Posted by MartinLe View Post
I was under the impression, that was my set up, I would not be able to run any ethanol.
You may find you can't run full e85, but as JasonGoFast said you could run a blend. Those injectors should help quite a bit in lowering your inj pw. I did the DSX lower aux pump instead of the booster and have no issues on the low side keeping 79-80psi wot. You may ask them to add the Lingenfelter high flow check valve to it. It wont cost a lot and will help keep the flow up.
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Sold 2012 2LT RS 12.3@112 old setup

Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS.

2017 HyperBlue ZL1 A10 ** Born 3/17/17**Delivered 4/08/17
2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. **807hp/762tq on 93 gas** and **848hp/792tq on e47**

Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver

Daily Driver 2021 BMW M340i Xdrive
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