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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHigher rpms (chipping) could be hazardous..
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singular most hated thing...well
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Read evidence and context
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and owing money is probably the singular most hated thing...well that and parking tickets.
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Suggestion · Original poster
To that end, we strongly recommend either limiting maximum RPM to the Factory fuel-cutoff at 6750 RPM or installing stronger rod bolts such as ARP or Raceware ones.Aftermarket racing rods like Pauter Engineering or Carillo ones are highly recommended as well.
Leading evidence: 'singular most hated thing...well' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'singular most hated thing...well' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Recommend either limiting maximum rpm' (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
To that end, we strongly recommend either limiting maximum RPM to the Factory fuel-cutoff at 6750 RPM or installing stronger rod bolts such as ARP or Raceware ones.Aftermarket racing rods like Pauter Engineering or Carillo ones are highly recommended as well.
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Suggestion
generally speaking, how many hrs of labour is it to change con rods..
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Suggestion · Original poster
Connecting Rod Bolts:Porsche utilized smaller, lighter rods in the 3.6 litre engines for internal clearance and to save reciprocating weight and they continued using the 9mm rod bolts from the 3.2 Carrera and 3.3 Turbo.
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Suggestion
Maybe they're now using even smaller bolts sourced from a Fiat Cinquecento
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Recommend either limiting maximum rpm
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Suggestion · Original poster
To that end, we strongly recommend either limiting maximum RPM to the Factory fuel-cutoff at 6750 RPM or installing stronger rod bolts such as ARP or Raceware ones.Aftermarket racing rods like Pauter Engineering or Carillo ones are highly recommended as well.
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Suggestion · Original poster
Connecting Rod Bolts:Porsche utilized smaller, lighter rods in the 3.6 litre engines for internal clearance and to save reciprocating weight and they continued using the 9mm rod bolts from the 3.2 Carrera and 3.3 Turbo.
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Generation: 20261026T194705Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
In response to a post concerning chipping and the potential hazards, I didn't have the source that was the basis for my comment..
The source for an informed discussion on chipping is
www.rennsportsystems.com/engines
Here is a snippet:
Connecting Rod Bolts:Porsche utilized smaller, lighter rods in the 3.6 litre engines for internal clearance and to save reciprocating weight and they continued using the 9mm rod bolts from the 3.2 Carrera and 3.3 Turbo. When operating these engines above 6800 RPM or for extended periods of time, we have seen failures of these critical bolts with catastrophic effects. To that end, we strongly recommend either limiting maximum RPM to the Factory fuel-cutoff at 6750 RPM or installing stronger rod bolts such as ARP or Raceware ones.Aftermarket racing rods like Pauter Engineering or Carillo ones are highly recommended as well.
If you install a performance chip, make sure that the stock rev limit has not been altered unless the rods and/or bolts are upgraded.
Oh good, I'll just change my connecting rod bolts this weekend since I have a few spare hours tomorrow morning
Damn, that's always goodto know. It makes you wonder why Porsche wouldn't just buy rod bolts and other critical pieces from ARP or Raceware. That said, no one makes a chip for my X51 equipped car so I'm safe (for now)...
generally speaking, how many hrs of labour is it to change con rods.. its gotta be up in th 7-10 range rite?
edit: i just took a look at the site. it seems as if he is refering to the older carrera's, not the new 996's (or at least i would assume so since the whole site deals with cars from the 80's and 90's).
I would imagine that it's at least that much but while you're in there, you might as well address all areas of potential weakness and do some cylinder head porting/flowing, no?
When is the suspension going in Dead-Eye?
as soon as my credit card statement comes and my max limit is reset. i let a friend throw some parts on there because he left his card at home when we went 2 JRP and i didn't realize that that would max it out...d'oh.
^ yeah i thought about doing that...but i'm the irresponsible type who would probably spend himself into debt. and owing money is probably the singular most hated thing...well that and parking tickets.
hm...after breifly analysing your arguement for all of 6 seconds...i've decided that you are infact right. Suspension will be ordered
i wonder how this will effect my SOLO1 classing.
I thought I read that the lesser bolts were used in the 3.6 litre engine due to clearance issues so that tells me that the 3.4 may be safer. That said, I wonder what they've done in the 3.8 of the 997s. Maybe they're now using even smaller bolts sourced from a Fiat Cinquecento
I couldn't find the writeup but I'm certain from the snippet that they are talking about the older aircooled engines. Our 3.6Ls are not derived from 3.2s and they don't have a factory fuel cut off at 6750 rpms.
I believe the 996 rods were smaller because of weight and clearance issue.
As far as being dissed for the post, perhaps the local hotshoes are not going near the limits of failure.
An engaging thread on the 996TT board of Kevin rebuilding a 996 engine to stage 7 is real interesting. He has pic of stock & aftermarket connecting rods.
https://rennlist.com/forums/showthre...77#post1967177
I suppose you can chip away a garage queen or a weekend Starbucks bus; but if you're going to the limit, you might like to consider these issues.
Just my .02
Torag,
I hope I didn't come across as dissing you. I think it's great when people go out and do research to share with the rest of us. I was just pointing out that it was likely targeted at another engine.
Jim
I had a chance to get through a couple pages of Kevin's post. Holy smokes! Now that sounds like fun. Lot's of good information too. My pocket book is very happy that club racing rules keep me from even talking to guys like that.
Thanks for the link.
Jim
