[KingLT1]

Originally Posted by JANNETTYRACING

Agreed, I wish the 2300 was still an option.

We should note, the 2650 will be easier on the high compression LT1 than a 1740 because it hits hard well below peak torque.

Boost pressure at Peak Torque is what we have to think about when boosting high compression engines.

Ted.

Good point. I am always thinking with the use of Ethanol.

[White1SS]

Originally Posted by JANNETTYRACING

The Stock manifolds and cats would be the limiter here, not so much to making the power but engine longevity due to head retention.

Long Tube headers with High flow cats are strongly recommended for this power level.

Same power can be made with lower boost and cooler EGT.

This power level would only be (SAFELY) achievable on either 98 octane or Flex fuel of at least 40% E content.

600 RWHP is pushing the limits on pump gasoline E-10

So just to use random numbers, with factory manifolds/cats you might need 10psi boost for 650 rwhp, with LT headers and high flow cats you might be able to achieve the same 650 rwhp with 8 psi ? Which of course would help with engine life. Are PD blowers "harder" on the engine than a centri due to always having more boost down low ?


Overall, at ~650 rwhp , would 98-100 octane race fuel, or E40+ make for a safer long lasting engine ?

[JANNETTYRACING]

Originally Posted by White1SS

So just to use random numbers, with factory manifolds/cats you might need 10psi boost for 650 rwhp, with LT headers and high flow cats you might be able to achieve the same 650 rwhp with 8 psi ? Which of course would help with engine life. Are PD blowers "harder" on the engine than a centri due to always having more boost down low ?


Overall, at ~650 rwhp , would 98-100 octane race fuel, or E40+ make for a safer long lasting engine ?

The 2650 or Centrifugal would be equally safe on the LT1 but the PD will be quicker and more fun.

Quality fuel is the lifeblood for safety on boost for any application.

[White1SS]

Is 100 octane aviation fuel an option for these set-ups ? Back in the day I used to run it in an old Duster I owned, but of course there were no cats, sensors, or computers of any kind.

[JANNETTYRACING]

Originally Posted by White1SS

Is 100 octane aviation fuel an option for these set-ups ? Back in the day I used to run it in an old Duster I owned, but of course there were no cats, sensors, or computers of any kind.

Yes.

[White1SS]

Originally Posted by JANNETTYRACING

Yes.

Wow, I was thinking I was going to get a resounding NO on that one ! lol.

[Caerus]

Originally Posted by White1SS

Wow, I was thinking I was going to get a resounding NO on that one ! lol.

I thought the same since aviation fuel 100LL is low in lead. I know it's not good for the environment, but maybe only the cats could be an issue?

[arpad_m]

Originally Posted by White1SS

Please forgive my ignorance on this subject guys, I'm just trying to figure out my best option for a FI system. I was pretty well set on a ProCharger system, but now I'm also considering a Maggie. This is for a non daily, sunny day, fair weather fun car. It's never going to see snow or rain, or a track or drag strip. Street/highway fun is where it will live its life, 3k-4k miles a year.

...

I understand that a Centri and PD build boost differently, and now feel I would prefer to have more power down low, but not to the point where it would be unusable on sticky 20" 315 street tires. I don't care so much about a dig, or top end speeds, I would like something that gets from say 30 to 130 in a hurry, in theory of course. lol.

I have a Maggie PD setup, similar to what you seem to be considering, see details in my signature. Mine is at ~700-735 rwhp (depending on E content) with normal, non-drag radial, non-racing, non-slickPilot Sport 4S tires, 315/30/20 in the rear, and it absolutely hooks from 30 and pulls like a freight train.

If you get drag radials that are a bit less of a compromise (say, Nitto 555RII) in 1LE sizes, you can probably go further up in power and still keep it usable.

Originally Posted by White1SS

Currently I'm thinking of going with a Maggie with flex fuel, LT4 fueling, and catch can, hoping for a safe and long lasting ~650 whp with stock clutch and exhaust.

Ted Jannetty and his crew built and tuned my car, and I'm sure they can hook you up. Zero problems, tuning is spot on (dyno video here), no secrets or hidden BS charges, I can recommend them with no qualms whatsoever. Last time the engine had to be modded in 2021 (no thanks to GM, but whatever), I sent her up to their shop in CT in a trailer and just paid for the job sight unseen, that's how much they can be trusted. The car came back perfect and has been ever since.

[White1SS]

Originally Posted by Caerus

I thought the same since aviation fuel 100LL is low in lead. I know it's not good for the environment, but maybe only the cats could be an issue?

Yes I was thinking of problems with the cats and maybe some sensors. I know it's low lead, but I'm not certain just how low it is. I think the oxygen content of it is higher as well compared to normal pump gas, but I guess if it's tuned with it everything would be fine. I would think av gas is of higher quality than any pump gas as well.

[White1SS]

Originally Posted by arpad_m

I have a Maggie PD setup, similar to what you seem to be considering, see details in my signature. Mine is at ~700-735 rwhp (depending on E content) with normal, non-drag radial, non-racing, non-slickPilot Sport 4S tires, 315/30/20 in the rear, and it absolutely hooks from 30 and pulls like a freight train.

If you get drag radials that are a bit less of a compromise (say, Nitto 555RII) in 1LE sizes, you can probably go further up in power and still keep it usable.



Ted Jannetty and his crew built and tuned my car, and I'm sure they can hook you up. Zero problems, tuning is spot on (dyno video here), no secrets or hidden BS charges, I can recommend them with no qualms whatsoever. Last time the engine had to be modded in 2021 (no thanks to GM, but whatever), I sent her up to their shop in CT in a trailer and just paid for the job sight unseen, that's how much they can be trusted. The car came back perfect and has been ever since.

I would love to have 700+ whp, but I want to keep the SBE. I was hoping to keep the factory exhaust manifolds and cats as well. I don't need anything too radical, just something that can occasionally battle a Hellcat, GT 500, Cadillac V's, BMW M's, etc.


Ted has a great reputation and is certainly at the top of my list for a builder. A google search shows his shop being about 4 hrs from me, not too far. I'm also only an hour or so from CSP in PA, and RPM in Delaware.

[Black16]

What would be the best build for a daily driver with 93 octane used at 3500 above sea level. Would a 416 with a 2650 be a good option?

[JANNETTYRACING]

Originally Posted by Black16

What would be the best build for a daily driver with 93 octane used at 3500 above sea level. Would a 416 with a 2650 be a good option?

It is a great Option but more than the stock fuel system can support but we now have Options.

Goliath pump and 70 Over injectors.

Feel free to give me a call when you are ready to put together a monster combo that you can take on vacation, go to work, Take to the tracks etc.

Ted.

[Black16]

Originally Posted by JANNETTYRACING

It is a great Option but more than the stock fuel system can support but we now have Options.

Goliath pump and 70 Over injectors.

Feel free to give me a call when you are ready to put together a monster combo that you can take on vacation, go to work, Take to the tracks etc.

Ted.

I have been thinking about this for a few years, stock power is not enough. At the same time I would only want to build something that is more reliable and efficient with less problems down the road. You were definitely on my list of builders that I would use for my project.

[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.