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| Home > Help Needed / General Tech Chat > Polished Rods need shot peening? | |||||||
 334 Posts Member #: 7169 Gobshite that posts wank videos. Somerset, UK |
18th Jan, 2011 at 02:49:01pm
Hello all
Gaball said:
Motorsport Engineering Student Project Car 1293 Turbo Mini (on a student budget) On 7th Oct, 2010 apbellamy said:
Carbon but plug? |
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1394 Posts Member #: 1346 Post Whore bromsgrove |
18th Jan, 2011 at 03:59:49pm
yes they will |
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 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
18th Jan, 2011 at 05:43:54pm
mine fully worked and are not shot peened this question has cropped up a few times with many yays and nays
Edited by Brett on 18th Jan, 2011. Yes i moved to the darkside |
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Forum Mod  5933 Posts Member #: 784 9 times Avon Park Class C winner Milton Keynes |
18th Jan, 2011 at 06:27:18pm
Ive been revving the same stress relieved, lightened polished and NOT peened rods to over 9,000 revs regularly for 11 years - no problems yet, not necessary IMO
I seriously doubt it! |
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248 Posts Member #: 7936 Senior Member DK-8450 Hammel. Denmark |
18th Jan, 2011 at 07:01:18pm
Ive revved my old 1098/1187 with lighten polished rods to 7500. They lasted. No problems, but shot peened might be stronger.
If i have more toys than you when i die, I WIN |
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9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
18th Jan, 2011 at 08:17:53pm
i like pauls post Yes i moved to the darkside |
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 549 Posts Member #: 5327 Post Whore Dudley, West mids |
18th Jan, 2011 at 08:43:33pm
I'm with you guys.
Edited by madcatminis on 22nd Jan, 2011. |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
18th Jan, 2011 at 10:23:40pm
I'd peen them, just for good measure. I've used Rob Selby previously, very happy with the work.
On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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 1030 Posts Member #: 1291 Post Whore Suffolk / Birmingham |
21st Jan, 2011 at 10:31:47pm
Never peened any and never broken any.. (who has!?)
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 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
22nd Jan, 2011 at 08:53:11am
Jon Flan broke a rod in his racer a little while a go On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it 
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744 Posts Member #: 7912 Post Whore Australia oi oi oi! |
22nd Jan, 2011 at 08:57:24am
peening is pretty cheap? if you have the spare cash i would.
Edited by NickG on 22nd Jan, 2011. |
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 3756 Posts Member #: 1709 I like granny porn. LONDONSHIRE |
22nd Jan, 2011 at 10:42:16am
anyone have an pics of a fully worked A+ rod? On 2nd Oct, 2009 Vegard said:
On 1st Oct, 2009 Jimster said:
I bet my first wank came quicker than your first mini turbo These new modern turbos with their quick spool up time, would make the competition harder. On 15th Aug, 2011 robert said:
phew!!! thank you brett for smashing in my back doors .( not something i imagined writing... EVER) |
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16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
22nd Jan, 2011 at 10:58:01am
have a look in my build thread. Carl has just done a set for me On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
20th Nov, 2011 at 10:27:43am
On 22nd Jan, 2011 rubicon said:
anyone have an pics of a fully worked A+ rod? 
A bit late? :) On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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3594 Posts Member #: 655 Post Whore Northern Ireland |
20th Nov, 2011 at 10:43:29am
On 20th Nov, 2011 Vegard said:
On 22nd Jan, 2011 rubicon said:
anyone have an pics of a fully worked A+ rod?
A bit late? :) Looks time consuming for not a lot removed ? Is it really worth the effort ? 9.85 @ 145mph
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 3673 Posts Member #: 9300 Post Whore Quarry Bonk |
20th Nov, 2011 at 11:17:57am
Apart from the reduced oil drag, they're nice to look at!
On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!! 17.213 @ 71mph, 64bhp n/a (Old Engine) |
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4018 Posts Member #: 1757 Back to Fucking Tool status Swindon |
20th Nov, 2011 at 12:11:20pm
I always took it as less weight on the rotating assembaley more power and normally more reliability but could be wrong, has anyone cryo treated rods and cranks before?? Drives
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3594 Posts Member #: 655 Post Whore Northern Ireland |
20th Nov, 2011 at 03:08:13pm
True, weight saving could be a help, puts less strain on stuff when revving.
9.85 @ 145mph
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4018 Posts Member #: 1757 Back to Fucking Tool status Swindon |
20th Nov, 2011 at 03:24:33pm
I suppose but i have seen alot more cryo treated blocks, gearbox casings, gear sets ect so why not crank rods ect, in theory if you are strenghtening them could you not take more weight off?
Drives
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
20th Nov, 2011 at 05:01:26pm
On 20th Nov, 2011 Paul R said:
I suppose but i have seen alot more cryo treated blocks, gearbox casings, gear sets ect so why not crank rods ect, in theory if you are strenghtening them could you not take more weight off? Also i can remember reading somewhere that every 1kg taken off the rotating assembely, drive tran ect is like addding 2-4hp or something. It seemed a high figure but have seen it on a few different documents online Think about the power if remove the crank and rods entirely. One gazilion? On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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3594 Posts Member #: 655 Post Whore Northern Ireland |
20th Nov, 2011 at 05:07:24pm
On 20th Nov, 2011 Paul R said:
I suppose but i have seen alot more cryo treated blocks, gearbox casings, gear sets ect so why not crank rods ect, in theory if you are strenghtening them could you not take more weight off? Also i can remember reading somewhere that every 1kg taken off the rotating assembely, drive tran ect is like addding 2-4hp or something. It seemed a high figure but have seen it on a few different documents online Ive never heard of anyone cryo'ing a block etc. But the presumption that it strengthens then it should allow you to remove more material, would have to heavily rely on you knowing exactly how much it strengthens by, and therefore how much more material you can remove. And I can only see that being pure guesswork. And 1kg from where on the rotating parts ? 1kg along it's centreline isnt the same as 1kg from the outer edge of the flywheel. Again, a huge grey area. But certainly lighter rods/pistons will give those parts an easier life. As long as you dont weaken them. It all comes back to though, how much is that little extra lightness or risk worth in real terms ? But to make a comparison with say a Toyota Starlet engine, or another skinny rod engine, the Mitsubishi 2.5V6 turbo from the Galant etc Their rods are absolutely tiny compared to anything Ive seen.. So maybe there is a lot of scope for lightening. Just found the pic. This is the aforementioned Mitsubishi rod. And yes it is as thin as it looks !! 
Uploaded with ImageShack.us 9.85 @ 145mph
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
20th Nov, 2011 at 05:15:14pm
that galant rod is weird, skinny, but how bit is the big end!
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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3594 Posts Member #: 655 Post Whore Northern Ireland |
20th Nov, 2011 at 06:14:16pm
On 20th Nov, 2011 Joe C said:
that galant rod is weird, skinny, but how bit is the big end! whats the rev limit o them? I know the 2.0 Mivec v6 is nearly 9k. Nothing about it shouted strong. Starlets are the same, although maybe not quite as bad. That was the only photo I took. Engine was fucked because the idiot owner ran it with no oil. Twin turbo V6, pretty sure they were a revvy engine too, although not 9k revvy 9.85 @ 145mph
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
20th Nov, 2011 at 08:07:11pm
It all depends on the base material spec. The A+ is EN16 IIRC, while those skinny starlet rods might well be some super strong material.
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
21st Nov, 2011 at 08:40:19am
Is £60 plus vat a fair price for getting a set of rod's peened? On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it
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