Tune question?
Melting Slicks
Joined: Aug 2022
Posts: 2,784
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Tuners are claiming the ability the raise rpm limit in manual mode. Not sure how worth it is on an otherwise stock car as they are losing power above 6000rpm. With a cam and heads it probably makes a good bit of difference.
Last edited by combatninja; Jul 28, 2025 at 01:05 PM.
Pro
Joined: Sep 2000
Posts: 678
Likes: 310
From: McKinney Texas
There is not much power to be unlocked with a tune on a stock car but yes you can raise the RPMs for manual shifting with a tune and the ECU transmission patch from HP Tuners. (You can't tune the transmission directly though.)
Race Director
Joined: Sep 2016
Posts: 13,180
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And this. The only advantage of revving higher would be in the rare instance where you need to shift at an awkward time on the track, and raising the redline lets you avoid that. But as quick as the DCT shifts, any gain would be minimal.
Le Mans Master
Joined: Mar 2001
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From: Omaha
2020 Corvette of the Year Finalist (performance mods)
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Yes, it is, but he's going cam/heads, so valve float shouldn't be an issue.
Race Director
Joined: Sep 2016
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Yes, multiple tuners have shown shifting above stock rev limit in manual mode. Supposedly, they are also close to having it for auto, but nothing confirmed yet. I've been very tempted to do cam/heads/E85 on my E-Ray, but I really want to wait for raised rev limit/shifts in full auto. I drive in manual most of the time, but for max accell runs, I'd want the auto shifts.
Yes, it is, but he's going cam/heads, so valve float shouldn't be an issue.
Yes, it is, but he's going cam/heads, so valve float shouldn't be an issue.
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Le Mans Master
Joined: Mar 2001
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From: Omaha
2020 Corvette of the Year Finalist (performance mods)
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Typically, you'd upgrade the springs when doing a cam to prevent float. But yes, all else being equal, going with a more aggressive cam does increase risk of float, but there are plenty of LS/LT engines pulling over 7K without issue.
Instructor
Joined: Mar 2025
Posts: 217
Likes: 122
The 1969 Camaro Z-28 could rev to 7500 RPM.
via Bring A Trailer
5.0-Liter V8
Power
290 HP
Torque
290 LB-FT
Maximum RPM
7,500 rpm
Due to its tuning, it ran roughly under 3,000 RPM and needed revs to perform. The legendary Z/28 was born. It was extremely powerful for its size and propelled Chevrolet to class championships in 1968 and 1969, even defeating the Boss 302.
1969 Camaro Z/28: 7,500 RPM
via Bring A TrailerSpecs
Engine5.0-Liter V8
Power
290 HP
Torque
290 LB-FT
Maximum RPM
7,500 rpm
Overview
- A de-stroked 327 was used for the Z/28s 302 cubic inch V8.
- Grossly underrated at 290 horsepower, most put it at 350.
- Built to compete in the SCCA Trans Am racing series.
Due to its tuning, it ran roughly under 3,000 RPM and needed revs to perform. The legendary Z/28 was born. It was extremely powerful for its size and propelled Chevrolet to class championships in 1968 and 1969, even defeating the Boss 302.
Drifting
Joined: Feb 2023
Posts: 1,361
Likes: 1,126
The 1969 Camaro Z-28 could rev to 7500 RPM.
5.0-Liter V8
Power
290 HP
Torque
290 LB-FT
Maximum RPM
7,500 rpm
Due to its tuning, it ran roughly under 3,000 RPM and needed revs to perform. The legendary Z/28 was born. It was extremely powerful for its size and propelled Chevrolet to class championships in 1968 and 1969, even defeating the Boss 302.
1969 Camaro Z/28: 7,500 RPM
via Bring A TrailerSpecs
Engine5.0-Liter V8
Power
290 HP
Torque
290 LB-FT
Maximum RPM
7,500 rpm
Overview
- A de-stroked 327 was used for the Z/28s 302 cubic inch V8.
- Grossly underrated at 290 horsepower, most put it at 350.
- Built to compete in the SCCA Trans Am racing series.
Due to its tuning, it ran roughly under 3,000 RPM and needed revs to perform. The legendary Z/28 was born. It was extremely powerful for its size and propelled Chevrolet to class championships in 1968 and 1969, even defeating the Boss 302.
Instructor
Joined: Nov 2011
Posts: 127
Likes: 62
From: South FL (Fort Lauderdale)
Racer
Joined: Apr 2020
Posts: 406
Likes: 303
From: Oklahoma
What fueling upgrades do you plan?
You can tune for increased redline but only in manual mode, and from what ive heard - if its in auto mode and over revs, it throws CEL.
Can't confirm the mechanics on if/how/why on the CEL... as mine is set to stock RPM limits. One of the things I want to change though... my engine is safe to go 7500 but I want it set @ 7000 or 7200... the power is just there all day above 5800, so even if its just flat, I would appreciate the extra run out on gears 3 and 4
You can tune for increased redline but only in manual mode, and from what ive heard - if its in auto mode and over revs, it throws CEL.
Can't confirm the mechanics on if/how/why on the CEL... as mine is set to stock RPM limits. One of the things I want to change though... my engine is safe to go 7500 but I want it set @ 7000 or 7200... the power is just there all day above 5800, so even if its just flat, I would appreciate the extra run out on gears 3 and 4
Melting Slicks
Joined: Aug 2000
Posts: 2,425
Likes: 1,198
From: Early 2020 Z51 Coupe, Original Owner, Ahwatukee Foothills, AZ
Tapped out N/A. E85, LTX Cam, LME Heads, stock bottom end. Going to add two installation pics, just need to get proper files set up.
Last edited by ArizonaZ06; Aug 6, 2025 at 05:55 PM.
