[JSH]

Originally Posted by Joshinator99

Nope. Fore triple in tank, to LPE BB HPFP, to LPE +52% injectors. Pretty simple for the most part. No meth or port, just tune one ECU. If you need to just get 93 octane, it's no problem and if I have access to E the car automatically adds the extra timing in (and the extra 90 HP too...).

We'll dyno my Stage X this week and expect to make around 815 corrected on 100 oct. I was about to order the BB and +30's for E85, but your +52 have me rethinking that.

[MP3BOOSTED]

OP, different supercharger but i made 800 on just 93 with my procharger on LT4 fuel system and DSX lowside.

my 2 cents, you should be able to make over 700 or just right at 800 with a 2650, torque would be almost identical as well.

[EDFHOBBIES]

Originally Posted by jamessh10

hey guys,
im wondering if anyone has a zl1 or SS with similar build, i just want an opinion on if my tuner is kind of putting a baby tune. i have a 2018 2SS A8.

Current Mod List:
2650 edelbrock 2650 (non ported)
ported and milled stock heads (gpi)
forged wiseco pistons & k1 forged rods(lowered compression)
1-7/8 catless LT headers going to 3" mid pipe to stock NPP
flex fuel sensor (which is pointless now)
zl1 intank low side, zl1 HPFP, zl1 injectors, and DSX aux pump
custom spec cam motion cam with 34 or 36% fuel lobe, I cant remember.
103mm TB
4" rotofab CAI (have the big gulp on order due to it dropping a lb of boost in the big end)
MSD plug wire (not sure what spark plugs they used)
DOD delete
BTR .660 platinum springs w/ Trunnion kit
GM performance CTSV lifters
BTR pushrods
Smith brothers bronze bushing rocker trunnion kit
a bunch of seals and gaskets
BTR lifter trays
ATI Harmonic Dampers
9.1" lower & 3.5 upper
Circle D converter 2800-3000 stall

Im sure im missing a couple things, but the main issue im running into is the CAI. It starts out on the dyno running 12lb of boost then drops off a lb at the end of the pull. my tuner suggest its bc of the smaller CAI. its making a little upward of 700whp on 93 pump gas. My tuner is saying that he really doesn't want to go anymore due to the fact I'm not running any meth or port injection. I've seen multiple people claiming to be making 850whp on pump gas my question is why they can but i cant lol. The shop that I am using has tuned it before with FBO and I've had no problem. they're deff a reputable shop, and they know their shit. am just wondering if anybody is running more than 12lb of boost just on pump gas without anything else, and or if someone is breaking over 800whp on pump gas. 800-850 is my goal, i do not want to go much that because i drive the car during the weekends. I don't want a straight race car to where every time i drive it something breaks. i want to enjoy the car. end of the story my tuner said i have to be really careful on just pump gas, but i dont see why 800whp isn't achievable on pump gas.. whats the max whp people are making just on 93 with zl1 fuel system with an aux pump, and how many pounds of boost?

The ported blower is the key if you just want to keep it around 850 on 93 octane in high temps. Coupled with opening the snout to 112mm and running the 112mm TB it was 100 hp difference not even swapping pulleys. Another key factor is keeping the compression around 10:1 or 10.5:1 I saw you milled the heads for some reason I'm guessing the pistons maybe had to much dish? Lower compression than the LT1 and and opening the blower up is the way to go. I know more compression makes more power but then your getting into adding meth or e85 this info is just for staying on 93.

Current mod list for me is very similar to yours.

Kong ported eforce
112mm TB
LPE GT31 cam with 38% (not 32 get the most from the pump)
CHE trunions
LT4 ported heads (Livernois stage 3)
1 7/8 headers
Big Gulp 5 inch intake
ATI pulley 8.3
Edelbrock pulley 3.0

With the porting on the blower I'm at 930 on 93 octane of course I'd never take it on the street like but doing so my pulley combo is badazz I'm barely turning this setup. Turning your blower harder and higher compression may make you meth dependent.

With all that you have on list I think you be fine if the compression is right.
I got detailed info on the LPE Eliminator setup which they sale for the purposes of 850 on 93 and 930 on all E. They told me the main difference on there setup vs others is the thicker head gasket from Cometic vs the stock LT4. I want to say the LT4 is around .053 and the cometic is .079 lowers compression enough and gives them a comfort zone so they can sale a 850 rwhp car on 93 with a warranty. They also install the 3 gal bumper tank for the intercooler system.

before I did port injection and blower porting I was at 850 with my lt4 fuel parts and dsx aux. I was running a 9.17 and 3 inch you can see the difference opening it up does for power and efficiency(less heat)

[JSH]

Originally Posted by EDFHOBBIES

... I'd never take it on the street ...

Why not? I've been driving and will continue to drive mine daily. What makes it undriveable?

[EDFHOBBIES]

Originally Posted by JSH

Why not? I've been driving and will continue to drive mine daily. What makes it undriveable?

What i meant is 930rwhp on 93 octane is a stupid idea! but there was plenty of fuel to do it! when the tuner tells you make sure you have some E in there if you get on it I listen. If I was going to Dallas from Houston and just cruising I would put all 93 in and then use E in dallas to play. I can make it 330 mile to there but on E I would need to stop in waco to fill up about the half way point if I was on all E.

The fuel system can be stretched out further with power adder that move a lot of air more efficiently. where as a LT4 1.7 blower maybe maxes at just over 700, a 2650 can make it to 850, and turbo kit can make it to 1000. You can't off the oem lt4 blower where the fuel maxes out at.

I drive mine all day at 1044 why cant you make that much power?

[JSH]

Originally Posted by EDFHOBBIES

why cant you make that much power?

I could spend as much as needed to make whatever HP an LT4 will make, but I've been set from the outset on keeping the OEM blower and running E85 and making whatever that will make. It's been and hopefully will always be a pretty easy car to drive on the road.

[Flexhorn]

I’m at 824 Rwhp with a maggie on pump 93

[Katech_Mike]

We have made 870RWHP on pump 93 using a Magnuson 2650. That is what we would consider the limit for a street driven car on 93 octane with this combination.

That being said. Listen to your tuner.

[Puddin]

Originally Posted by Katech_Mike

We have made 870RWHP on pump 93 using a Magnuson 2650. That is what we would consider the limit for a street driven car on 93 octane with this combination.

That being said. Listen to your tuner.

Is that on a full Lt4 fuel system?

[JSH]

Originally Posted by Katech_Mike

We have made 870RWHP on pump 93 using a Magnuson 2650. That is what we would consider the limit for a street driven car on 93 octane with this combination.

That being said. Listen to your tuner.

I assume the 870 has little if any correction (0-3%)

[Katech_Mike]

Originally Posted by Puddin

Is that on a full Lt4 fuel system?

XDI 30% Injectors. Stock LT4 HPFP.

We typically make around 830RWHP with OEM LT4 Injectors and pump.

[Katech_Mike]

Originally Posted by JSH

I assume the 870 has little if any correction (0-3%)

Correct. We dyno in SAE. Typically its between -2% and +2% depending on the weather.

[JSH]

Originally Posted by Katech_Mike

XDI 30% Injectors. Stock LT4 HPFP.

We typically make around 830RWHP with OEM LT4 Injectors and pump.

I assume on 93 oct.; have you tried 100 oct. tunes?

[Katech_Mike]

Originally Posted by Puddin

Is that on a full Lt4 fuel system?

We were able to make 870RWHP on a full OEM LT4 high side (DSX low side) on 93 octane. It is hard up against the limits on the stock injector.

I tried to upload the graph but there must be a minimum post count to post photos.