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sequential
Joined: 18 Nov 2005
Posts: 500
Location: BANNED
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 Posted: Fri Apr 21, 2006 6:14 am Post subject: Has anyone done upgraded Rod Bolts on the stock rods. |
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Hello Guys ,
I'm looking for upgraded rod bolts for the stock 931 rods , it would save some research time if anyone here has done one before and know for eg. if vw / audi rod bolts by arp will fit, as no one list anything for a 924.
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928 gts prototype
baby blue engine block
steam in 1,2,3,4 sometimes
cold star issues while on stands
112 whp with new 4 valve head and MIS 2 |
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Smoothie
Joined: 01 Jan 2003
Posts: 8032
Location: DE (the one near MD, PA, NJ)
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| Posted: Fri Apr 21, 2006 6:35 am Post subject: |
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Try here? - http://www.raceware-fasteners.com/photo.htm
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"..it's made in Germany. You know the Germans always make good stuff."
'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox |
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Tigger937
Joined: 11 Apr 2004
Posts: 919
Location: PCA Milwaukee Region
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| Posted: Fri Apr 21, 2006 6:43 am Post subject: |
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Recently I chatted with the folks at Raceware and the only thing they offer at this time for the 931 is head studs.
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1981 931 (Concours)
1982 931 (Daily Driver)
"Think outside the box" |
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simsport
Joined: 06 Nov 2002
Posts: 573
Location: UK Warrington
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| Posted: Fri Apr 21, 2006 8:37 am Post subject: Rods |
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Why upgrade them?
Everything on the 931 is pretty solid and unless you are looking to go to major power/rpm gains the std bolts should be fine. I have reused mine as they were out of stock here, no problems even after 2 seasons.
Cheers
Simon
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Lizard
Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada
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| Posted: Fri Apr 21, 2006 10:54 am Post subject: |
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I am pretty sure Simon that he is going to be going with ALOT of power on this engine, which I am not sure as to why he is using stock rods for that. But I am sure he has his reasons
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3 928s, |
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CBass
Joined: 03 Nov 2002
Posts: 2807
Location: Vancouver, Canada
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| Posted: Fri Apr 21, 2006 11:40 am Post subject: |
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Stock rods are pretty stout, a nice polish and a shotpeen and I wouldn't worry about them as long as they're still nicely within round.
If you need something stouter, there are forged H beam rods for VW engines that are the right length.
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'81 931 in various states of assembly |
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sequential
Joined: 18 Nov 2005
Posts: 500
Location: BANNED
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| Posted: Fri Apr 21, 2006 12:37 pm Post subject: |
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| Tigger937 wrote: | | Recently I chatted with the folks at Raceware and the only thing they offer at this time for the 931 is head studs. |
that was pretty much my understanding and has been that way with them for the last 8 yrs.
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928 gts prototype
baby blue engine block
steam in 1,2,3,4 sometimes
cold star issues while on stands
112 whp with new 4 valve head and MIS 2 |
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CBass
Joined: 03 Nov 2002
Posts: 2807
Location: Vancouver, Canada
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| Posted: Fri Apr 21, 2006 12:40 pm Post subject: |
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Get out the digital verniers...
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'81 931 in various states of assembly |
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sequential
Joined: 18 Nov 2005
Posts: 500
Location: BANNED
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| Posted: Fri Apr 21, 2006 12:42 pm Post subject: Re: Rods |
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| simsport wrote: | Why upgrade them?
Everything on the 931 is pretty solid and unless you are looking to go to major power/rpm gains the std bolts should be fine. I have reused mine as they were out of stock here, no problems even after 2 seasons.
Cheers
Simon |
Well because my motor had over spun enough to bend valves ( 9000 rpm it had appeared ) and for safety reason wanted to change the rod bolts. Porsche only has the nuts new , but no bolts.
If anyone has one handy i could send it to My contact at ARP for a match.
we will all benifit from this at rebuild time.
_________________
928 gts prototype
baby blue engine block
steam in 1,2,3,4 sometimes
cold star issues while on stands
112 whp with new 4 valve head and MIS 2
Last edited by sequential on Fri Apr 21, 2006 12:54 pm; edited 2 times in total |
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sequential
Joined: 18 Nov 2005
Posts: 500
Location: BANNED
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| Posted: Fri Apr 21, 2006 12:46 pm Post subject: |
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| Lizard wrote: | | I am pretty sure Simon that he is going to be going with ALOT of power on this engine, which I am not sure as to why he is using stock rods for that. But I am sure he has his reasons |
Stock rods will handle a lot of power, but is RPM limited to 7200 rpm with the stock rod bolts. On my full race motor i'am using Pauter with Wiseco pistons, as we plan to turn that engine to 7800 -8000.
THis is for my backup engine for DE and customer rentals etc. which will be using prepared stockparts with upgraded valve train. we will push this engine to 300 whp max on the stock parts for extended track use.
experience over the years have shown that stock rods will handle a lot more Hp than most would think but will fail if it also includes a significantly higher engine speed .
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928 gts prototype
baby blue engine block
steam in 1,2,3,4 sometimes
cold star issues while on stands
112 whp with new 4 valve head and MIS 2 |
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CBass
Joined: 03 Nov 2002
Posts: 2807
Location: Vancouver, Canada
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| Posted: Fri Apr 21, 2006 1:51 pm Post subject: |
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It's actually amazing how muhc more stressful running at high rpms is to components and bearings than increased cylinder pressures. Most people don't realize how much force is involved and how even a very rigid forged crank can being to flex an awful lot.
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'81 931 in various states of assembly |
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My924gtc
Joined: 14 Aug 2004
Posts: 1362
Location: 248
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| Posted: Fri Apr 21, 2006 3:46 pm Post subject: |
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One rod bolt coming up.
PM sent.
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MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06
Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands" |
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