05-25-2024, 10:08 AM | #1 |
Drives: 2020 Camaro SS 1LE | Satin Steel Join Date: Jan 2022
Location: Lubbock, Tx
Posts: 254
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Heads/Cam underwhelming
My car is done with 93 tuning now… and it is slow as shit… I got tuned by GPI, and I have no doubts they know their stuff, but I think my car is just a dud. My setup is:
GPI SS3 cam GPI ported heads MSD Intake 103mm throttle Roto-Fab SE 1 7/8th headers ATI damper Internals are: Johnson 2110r lifters 7.850 3/8” pushrods (.025-.030 preload) CHE trunnions SBE When I was just FBO E85, I was able to slowly walk away from my brothers BONE STOCK 23’ mustang GT auto with 3.15 gears. Now it’s somwhere between BARELY slower than previous and BARELY faster than previous… On the same dyno, I made 409whp stock, and 481whp FBO E85… I figured HCI 93 oct would make around 500-510 on that same dyno. Granted I haven’t taken it back there because they want $300 for a dyno pull. It doesn’t feel like it’s making any more power… and I’ve lost a lot of driveability.
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HCI | GPI SS3 | E85 | xxx whp \ xxx tq
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05-25-2024, 10:36 AM | #2 |
Drives: 2022 Camaro ZL1 Join Date: Sep 2023
Location: Georgia
Posts: 54
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With Meth and E you should really feel a difference. FBO on an SS with 93 only is a big waste. Same with the mustang. All those big gains come from full E on the gen three coyote. All the rest of the FBO mods are 1-2hp here 3-4hp there.
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05-25-2024, 10:37 AM | #3 |
Drives: 23 2SS 1LE Join Date: Feb 2019
Location: GA
Posts: 606
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There may be something wrong with the tune or install then, your FBO mods are set up to really complement the heads and cam in the upper RPM range. Granted, a 20 horsepower bump at that level isn't going to be very noticeable, but you certainly shouldn't be slower. I would go for an E tune if possible.
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05-25-2024, 12:00 PM | #4 |
Drives: 2020 Camaro SS 1LE | Satin Steel Join Date: Jan 2022
Location: Lubbock, Tx
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Yeah I’m getting flex fuel tuning, I just have to wait a week because I’m busy.
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HCI | GPI SS3 | E85 | xxx whp \ xxx tq
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05-25-2024, 12:09 PM | #5 |
Drives: 17 hyper blue 2SS M6 Join Date: Mar 2018
Location: NorCal
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I'd think with that setup you should feel a big difference. I dyno'd at 475 FBO and E, and 550 when I added my cam and ported heads to it, with the LT2 manifold. It really pulled hard up top, I did lose some low speed driveability and idle quality, the torque numbers actually dropped just a bit when I added the cam. I'd guess something is going on there if you can't immediately feel it pulling harder. I think putting it on the dyno is money well spent here, if you're not seeing gains with that setup then there's definite proof.
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05-25-2024, 12:34 PM | #6 |
Drives: 2020 Camaro SS 1LE | Satin Steel Join Date: Jan 2022
Location: Lubbock, Tx
Posts: 254
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Yeah, only thing is, I’d have to go back to the original dyno I had it on. Which isn’t really a problem except for I don’t have much time.
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05-25-2024, 07:41 PM | #7 |
Drives: '22 Camaro ZL1 1LE A10 Join Date: Jul 2021
Location: SoCal
Posts: 329
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I'm not expert, but I would say going from E85 to 93, even with the cam is where you are losing power. E85 is where you were making gains. Once you get it tuned again with flex fuel/e85 you will probably feel the difference.
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05-25-2024, 07:43 PM | #8 | |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Here
Posts: 1,495
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Quote:
SS3 cam is not for drivability. So you can get that idea out of your head. SS1 would be, maybe an SS2. Some drivability can be had in the tune. You also lose torque on the low end with a cam, the bigger cam you get the more torque you lose on the low end. An aftermarket Stall converter will help with the launches. I figure if you have an SS3 they had to have done a TC swap to maybe a 3000-4000+. Have you compared 60-130 times, because that's where you are going to see the most gains with that kind of cam. And even higher up 130+ Just my thoughts feel free to correct me.
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | Roto-Fab CAI | LT2 Ported | 95mm ZR1 TB | LSA crankshaft conversion w/modified crank gear | LS1 thrust bearing | LS MSD Plug Wire Set | BTR Stage I Cam | ARP Rod Bolts | Delphi Lifter set | NGK LTR5IX-11 spark plug set | DOD Delete | VVT Limiter | ECM, TCM & E85 | Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq | Best 1/4 Time: 11.639
Last edited by FlukeSS; 05-25-2024 at 08:03 PM. |
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05-25-2024, 07:52 PM | #9 |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Here
Posts: 1,495
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Meth port/direct injection?
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | Roto-Fab CAI | LT2 Ported | 95mm ZR1 TB | LSA crankshaft conversion w/modified crank gear | LS1 thrust bearing | LS MSD Plug Wire Set | BTR Stage I Cam | ARP Rod Bolts | Delphi Lifter set | NGK LTR5IX-11 spark plug set | DOD Delete | VVT Limiter | ECM, TCM & E85 | Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq | Best 1/4 Time: 11.639
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05-25-2024, 07:59 PM | #10 | |
Drives: 2024 LT1 Join Date: Feb 2024
Location: Ohio
Posts: 57
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Quote:
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05-25-2024, 08:07 PM | #11 | |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Here
Posts: 1,495
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Quote:
That's the biggest rear end you can use on an auto for these cars. If it is an M6 then he's running a 3.73 rear end and M6's 1st gear is a longer gear.
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | Roto-Fab CAI | LT2 Ported | 95mm ZR1 TB | LSA crankshaft conversion w/modified crank gear | LS1 thrust bearing | LS MSD Plug Wire Set | BTR Stage I Cam | ARP Rod Bolts | Delphi Lifter set | NGK LTR5IX-11 spark plug set | DOD Delete | VVT Limiter | ECM, TCM & E85 | Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq | Best 1/4 Time: 11.639
Last edited by FlukeSS; 05-25-2024 at 08:20 PM. |
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05-25-2024, 08:21 PM | #12 |
Drives: 2020 Camaro SS 1LE | Satin Steel Join Date: Jan 2022
Location: Lubbock, Tx
Posts: 254
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it’s an M6 car. So driver error is DEFINITELY a factor, since I’m not the fastest at shifting.
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HCI | GPI SS3 | E85 | xxx whp \ xxx tq
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05-25-2024, 08:25 PM | #13 | |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Here
Posts: 1,495
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Quote:
I'll defer to the M6 guys expertise here. But everything else I said earlier does apply. Bigger Cam, Drivability, etc. Just probably can ignore what I said about Torque Converter and/or A10 stuff.
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | Roto-Fab CAI | LT2 Ported | 95mm ZR1 TB | LSA crankshaft conversion w/modified crank gear | LS1 thrust bearing | LS MSD Plug Wire Set | BTR Stage I Cam | ARP Rod Bolts | Delphi Lifter set | NGK LTR5IX-11 spark plug set | DOD Delete | VVT Limiter | ECM, TCM & E85 | Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq | Best 1/4 Time: 11.639
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05-25-2024, 10:02 PM | #14 |
Drives: 2020 Camaro SS 1LE | Satin Steel Join Date: Jan 2022
Location: Lubbock, Tx
Posts: 254
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M6 is stuck shift, so no converter, only clutch. Stock clutch is good for the power. My basis for thinking it’s slow is the gap between me and my brother’s bone stock 23’ mustang gt auto. The gap between us was the same both HCI on 93 and FBO E85. I feel like it shoulda been a little more. Also I haven’t done a 60-130 with my dragy, but hand timed was like 11.20 something in 4200 DA.
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