Planet-9

ECU swap in 987.1 to run different octanes (100 / 93)?

Add to repair workspace

New repair projectOpen repair workspace

Original source

5 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHECU swap in 987.1 to run different octanes (100 / 93)?

Leading reported evidence

Run 100 octane fuel

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
and it came with a tune on it to run 100 octane fuel.
Original post Read captured discussion
ECU swap in 987.1 to run different octanes (100 / 93)?

Read full discussion summary

Leading evidence: 'Run 100 octane fuel' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run 100 octane fuel' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 5 captured posts examined · 1 partial discussions

Compare 2 other evidence results

Run 93 octane

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
to run 93 octane.
Original post Read captured discussion
ECU swap in 987.1 to run different octanes (100 / 93)?

Run hpde's

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
You could call ITC to see what fuel additive you can use to boost the octane level close enough 100 to run HPDE's.
Original post Read captured discussion
ECU swap in 987.1 to run different octanes (100 / 93)?

Frequently discussed actions (3)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Run 100 octane fuel

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
and it came with a tune on it to run 100 octane fuel.
Original post Read captured discussion
ECU swap in 987.1 to run different octanes (100 / 93)?

Run 93 octane

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
to run 93 octane.
Original post Read captured discussion
ECU swap in 987.1 to run different octanes (100 / 93)?

Run hpde's

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
You could call ITC to see what fuel additive you can use to boost the octane level close enough 100 to run HPDE's.
Original post Read captured discussion
ECU swap in 987.1 to run different octanes (100 / 93)?

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Planet-9: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Hi there, Just picked up a 2008 987.1 Cayman S and it came with a tune on it to run 100 octane fuel. I'd very much like to keep that tune in tack and then purchase a separate ECU to run 93 octane. The car is set up as a GTB1 car so I'd love to keep the 100 octane for GTB1 races but then run 93 octane for HPDE events. Any idea what's involved with doing that? I can certainly have the ECU re-flashed back to a 93 octane tune but then I can't bump it back up to 100 octane for GTB1 races. Thanks! Chris P.S. - This is a track only car if that matters.

POST 2Original post

Do you know where the tune came from?

POST 3Original post

The 100 octane tune that's on there is an ITC Spec Evo Tune.

POST 4Original post

You could call ITC to see what fuel additive you can use to boost the octane level close enough 100 to run HPDE's. They are not as stressing to your engine, developing heat in the pistons, rings, heads as a full on race. I spoke to Scott at Softronics about a 100 octane race file for my 07 Cayman S . He suggested that if it were only used as a race car at sea level, he would do it, but that's not what I am doing. He suggested a lower octane fuel map (93) and suggested a fuel additive to make up the difference. I am not sure you can go from 91 to 100 octane with a fuel additive, but a sea level you might be close enough to prevent pinging. The alternative is to call Scott at Softronics, explain your situation and have him remap (flash) an old junkyard 08 Cayman ECU that you installed in your car for HPDE's. You could then decide which to use as your GTB1 race ECU . I would suggest that Scott's version may surprise you.

POST 5Original post

Ok cool that's a good idea. I'll reach out. Thx very much!

This is a source reference. Confirm exact model applicability in the original material.