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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 GTS Build
Leading reported evidence
Install had negligible impact
Performed · outcome unconfirmed
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Performed · outcome unconfirmed · Original poster
The roll cage I installed had negligible impact to chassis and in my opinion only useful to run harnesses (and arguably safety) which is for the slightly more dedicated track goers than me.
Leading evidence: 'Install had negligible impact' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install had negligible impact' (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.
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Suggestion · Original poster
Not one aspect has a huge change but certainly better than sum of parts.
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Suggestion
For the 2wd conversion did you convert the front driveshafts to stub axles or change the uprights so you can run the better geometry of the 2wd setup?
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.
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Suggestion
For the 2wd conversion did you convert the front driveshafts to stub axles or change the uprights so you can run the better geometry of the 2wd setup?
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
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion · Original poster
The roll cage I installed had negligible impact to chassis and in my opinion only useful to run harnesses (and arguably safety) which is for the slightly more dedicated track goers than me.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Install had negligible impact
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
The roll cage I installed had negligible impact to chassis and in my opinion only useful to run harnesses (and arguably safety) which is for the slightly more dedicated track goers than me.
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 · Original poster
The roll cage I installed had negligible impact to chassis and in my opinion only useful to run harnesses (and arguably safety) which is for the slightly more dedicated track goers than me.
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.
15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
996 present great value for money and whilst the C4S is a bit stronger money you are still getting a lot of car for the money considering a lot of the underpinnings are present in 997/991.
Following the creation of an E39 M5 Competition I decided to build the arguably missing 996 model the 996 GTS. Inspired by the 997 and later GTS models.
For those interested here are the thoughts and build.
Why? - have kids, like to tweak, find the GTS the perfect mix between C2 and GT3 for a person who likes fast road, touring and a gentlemans occasional track day
Start? - a midnight blue C4S for the lovely wide body, bum and the fact it already had turbo brakes, larger radiators, stiffer chassis and wider track
GTS Inspired Specification:
GTS Chassis - 2WD Conversion, weight pack minus c.80kg (half this in the conversion approx) approx revised weight c.1,400kg vs c.1,470kg std and C2 at c.1,320kg all circa as dependant on options a bit, uprated engine mounts, GT3 shifter
GTS Engine Protection - deep baffled sump + LTT
GTS Interior - some grey alcantara over grey leather with a few yellow accents
GTS Suspension - Ohlins based, custom spring rates, custom geo, custom corner weight, 30mm wider track, Cup 2 tyres
Review:
Limited miles in the car at the moment mainly due to terrible weather but impressions are as follows. Comfort levels on par if not better than stock. Turn in substantially better. Understeer almost completely eradicated. Weight transfer more controlled. Picks up better with noticeable performance improvement, not massive but noticeable. Steering feel was the surprising winner here, much more communication coming back, a touch lighter also. Not one aspect has a huge change but certainly better than sum of parts. I guess that is the GTS though so perhaps mission accomplished. When the weather gets better I will get some photo's done and a few more miles to really reveal things.
Editing to answer post questions from folks:
- weight: was weighed yes, was 1590kg on scales with 110kg ballast for me plus 2/3 tank fuel plus a half cage of c20kg. So take that all off I get c.1400kg without fuel. If Porsche figures are no fuel also then comparable.
- lsd: I wanted to try car without first as 295 rears are pretty big for the power, I would add a quaife torque sensing as a tweak if needed rather than the plated type in GT3 which is similar to the wave track offering
- pics & driving impressions: I know, keen, believe me!
- power: be interested in folks views on this but doesn't seem lots can be had so where to go first? 200cel cats might be straight forward for a touch? A hartech 3.9 was clearly top of my list but expensive
I've seen lots of threads where people consider converting a 4S to '2S' but nothing ever comes of it, so good on you for doing it! Looking forwards to pictures, hopefully including ones of the mod process?
You just need to get some lighter rims on and a bit of extra power and then it'll be fully on the formula. IPD plenum and Alleggeritas spring to mind, though I have no clue as to cost or what rims you're currently running.
That M5 sounds interesting too... any thread on it somewhere?
ETA an LSD would also be great and get more of the GTS vibe, especially if you're on track a lot. Hope this is coming off as suggestions and enthusiasm for the car, and not dissing it.
Did you weigh the car after you'd done your modifications?
I ask because my car (C2 cab) lists at 1,395kg but when I weighed it came in at 1,492kg - only 3kg under the list weight for the C4S (1,495).
Therefore, your starting weight may well have been list plus 100kg, depending as you say on options fitted, so it'd be interesting to see how it ended up, and where the weight is in the car.
For the 2wd conversion did you convert the front driveshafts to stub axles or change the uprights so you can run the better geometry of the 2wd setup? I assume the front diff and propshaft were pulled to save weight?
I fancy a C4S project next, I think it has the best rear end, and a wide body 2wd NA car was always missing from the 996 lineup.
MC
Both gone yes to save weight and everything capped off. Suffice say there is a right way to do it and several wrong ways. As this is not a garage special I have had professionals and race teams look at all the aspects so I don't want to infringe their IP. I understand enough to know what to ask and what I want is basically it.
C4S is a great starting point for a project so go for it. 996 present great value for money and whilst the C4S is a bit stronger money you are still getting a lot of car for the money considering a lot of the underpinnings are present in 997/991. The main difference between 996 and say BMW of a similar age is race car for road approach vs road car first. The chassis for the time are excellent so make great bases. The roll cage I installed had negligible impact to chassis and in my opinion only useful to run harnesses (and arguably safety) which is for the slightly more dedicated track goers than me.
