[arpad_m]

Originally Posted by tortilla-flats

I guess I'll jump in this conversation. Looking at the TVS2650 kit, they explicitly state no E85 or octane booster. Can someone explain the reasoning on that?

I'm thinking that kit on E85 (with LT4 fueling) would be the sweet spot for my HP goals.

Who is "they", the site that is selling the kit or a performance shop? What they probably mean is if you want to run any more than 10-15% ethanol with a Maggie on an LT1 engine, you should upgrade the entire fuel system, too (low side, high side, injectors), there is zero headroom for extra E if you don't. Ethanol requires 25% more fuel than pump 93 for the same lambda, and that needs to be pushed into the engine somehow.

As to octane boosters, those that actually work all contain MMT and are thus technically illegal for street driving, maybe the caveat is a standard disclaimer.

[JANNETTYRACING]

Originally Posted by tortilla-flats

I guess I'll jump in this conversation. Looking at the TVS2650 kit, they explicitly state no E85 or octane booster. Can someone explain the reasoning on that?

I'm thinking that kit on E85 (with LT4 fueling) would be the sweet spot for my HP goals.

They state that becuase the LT1 fuel system is taxed to the MAX just by adding the supercharger.

So you are correct, An LT4 fuel system will be required to run any E contents above E-10

Ted.

[White1SS]

I was watching a video the other day from one of the popular Camaro shops on the east coast. They were doing a LT1 M6 car that dyno'd around 406 whp stock from the factory. They went with a full bolt-on set-up, cam, heads, 2" headers, exhaust, MSD intake, CAI, and Flex fuel. They ended up picking up about 210 whp with factory fueling. I was wondering, if a boosted set-up needs fueling to add 200 whp, why wouldn't a NA build need it as well ?

[tortilla-flats]

Originally Posted by arpad_m

Who is "they", the site that is selling the kit or a performance shop? What they probably mean is if you want to run any more than 10-15% ethanol with a Maggie on an LT1 engine, you should upgrade the entire fuel system, too (low side, high side, injectors), there is zero headroom for extra E if you don't. Ethanol requires 25% more fuel than pump 93 for the same lambda, and that needs to be pushed into the engine somehow.

As to octane boosters, those that actually work all contain MMT and are thus technically illegal for street driving, maybe the caveat is a standard disclaimer.

"They" is the manufacturer, Magnuson.

Yeah, I'm aware of E85 requirements. Surprised there is any headroom at all for the blower with the stock LT1 fueling. I had a FBO/E85 C7 that was running at 85% IDC, for all practical purposes maxed out.

Sorry for the drive-by posting earlier, had limited time.
Here's the installation instructions for the supercharger kit. (page 2)
https://cdn.shopify.com/s/files/1/05...f?v=1709848646

Also, page 1 has a corrosion warning.

[tortilla-flats]

Originally Posted by JANNETTYRACING

They state that becuase the LT1 fuel system is taxed to the MAX just by adding the supercharger.

So you are correct, An LT4 fuel system will be required to run any E contents above E-10

Ted.

Thanks. Wondering if that voids the warranty from Magnuson if you up the fueling bits?

[WiggyB]

Originally Posted by White1SS

How much did you gain over your baseline ? Are the 7 psi units that advertise 150 or 170 hp gains referring to rwhp, or at the crank ? I'd be thrilled with a gain of 170 rwhp on 94 octane with nothing more than the ProCharger and a tune.


Do you know if there is a any benefit to using their system that uses the factory airbox, or does their regular system that uses an open under the hood cone style filter just as good ?

I have the 50 state legal setup and there is about 1 psi loss with it. The standard setup makes 7psi where the factory box I made 6. I wouldn't suggest you doing that unless you have the proper fueling to support it. Its a fairly clean setup but if you want the most bang for your buck the standard setup would be best for you. I can't say much for the procharger tune never used it had it tuned by a shop after installing.

[tortilla-flats]

Another question on the TVS2650 kit. Does the included tuner preserve the AFM/DOD functionality or is it turned off?

[cjperformance]

Originally Posted by White1SS

I was watching a video the other day from one of the popular Camaro shops on the east coast. They were doing a LT1 M6 car that dyno'd around 406 whp stock from the factory. They went with a full bolt-on set-up, cam, heads, 2" headers, exhaust, MSD intake, CAI, and Flex fuel. They ended up picking up about 210 whp with factory fueling. I was wondering, if a boosted set-up needs fueling to add 200 whp, why wouldn't a NA build need it as well ?

Forced induction setups usually run richer, and to get the same 200 whp gain with FI you have to factor in the parasitic loss of the blower... so in summary blower takes more fuel to make the same power. More or less.

[White1SS]

Originally Posted by cjperformance

Forced induction setups usually run richer, and to get the same 200 whp gain with FI you have to factor in the parasitic loss of the blower... so in summary blower takes more fuel to make the same power. More or less.

So just using random numbers... due to parasitic losses associated with FI, a FI set-up really needs enough fuel to make say 50 more hp than a NA motor to net the same 200 whp gain ?

[cjperformance]

Originally Posted by White1SS

So just using random numbers... due to parasitic losses associated with FI, a FI set-up really needs enough fuel to make say 50 more hp than a NA motor to net the same 200 whp gain ?

That seems like a reasonable estimate. My uneducated guess is about 5% to 20% parasitic loss, but it depends a lot on the setup... PD vs centri.... supercharger drive ratio, etc. Id say a good estimate is that a blower would take about 10% more fuel than NA for many cases.

I wouldn't say the "same" 200 hp. To make BIG power NA you usually have to sacrifice somewhere else, where an sc will typically increase across the board.