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 514 Posts Member #: 2104 Post Whore Essex - UK |
11th Sep, 2011 at 01:13:54pm
I'm running forged omegas not had it running long so can't really comment on how it is As a daily drive as taking it easy at the mo just to be sure everything is spot on. but with arp main bots, sc billit rods phase 2 cam and stock crank with knife edged and toughened what rev limit do people recon.
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
11th Sep, 2011 at 03:48:13pm
Nah. Edited by Vegard on 11th Sep, 2011. 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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 3074 Posts Member #: 1348 Post Whore wakefield West Yorks |
11th Sep, 2011 at 05:25:22pm
Whats up V, did you sneeze on the keyboard. On 11th Sep, 2011 Vegard said:
Nah. |
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4309 Posts Member #: 1321 Post Whore Wiltshire |
10th Oct, 2011 at 09:17:53pm
On 10th Sep, 2011 PaulH said:
That is defiantly the key Robert the lighter the piston and rod the longer the crank will live at high rpm a slightly longer rod in the A series make quite a difference to crank. Having thrown out the idea of doing a short stroke engine last year this thread has kinda pushed it back into my mind again. Would the combination of 70.2mm South African crank, longer rods and some very light forged pistons result in a bottom end which would be reasonably bullet proof? That is to say the fatigue life of the crank would be significantly longer then that of a 1275 crank. I imagine that the extra journal overlap would mean not only a stiffer crank (so kinder to bearings) but one much more resistant to fatigue. On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
11th Oct, 2011 at 09:23:50am
Yes.
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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388 Posts Member #: 442 Senior Member Manchester |
11th Oct, 2011 at 11:23:02am
Really? i thought it was the other way around? I thought that long stroke engines dont rev as high but generally produce more torque. Whereas Short strokers make more HP, less torque but are high revving. |
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
11th Oct, 2011 at 11:28:06am
your right, But V's taking about rod lengths,
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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4309 Posts Member #: 1321 Post Whore Wiltshire |
11th Oct, 2011 at 09:24:43pm
On 11th Oct, 2011 Vegard said:
Yes. But, fitting longer rods does decrease the torque potential of the engine albeit increasing hp. Is that what you want with a short stroke engine? Personally I would rather have rpm at the sacrifice of torque. I don't think 180 hp, 150lb/ft and 8500rpm potential would be unrealistic from an 1146cc (70.2 stroke with +60 pistons) on 20 psi. Better find out if John K is doing a 6 inch rod yet. On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
11th Oct, 2011 at 09:26:07pm
I agree, If I was going short stroke, I'd go for a long rod amd make the mos of the RPM. 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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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
12th Oct, 2011 at 08:54:15am
If I was using a 6" rod, I'd get a forged one.... 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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Forum Mod  5933 Posts Member #: 784 9 times Avon Park Class C winner Milton Keynes |
12th Oct, 2011 at 04:50:41pm
On 12th Oct, 2011 Vegard said:
If I was using a 6" rod, I'd get a forged one.... Id get 4 I seriously doubt it! |
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 1849 Posts Member #: 672 The oversills police Oslo, Norway |
12th Oct, 2011 at 05:30:40pm
Haha! |
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4309 Posts Member #: 1321 Post Whore Wiltshire |
22nd Feb, 2012 at 08:14:16pm
Lets assume one wanted to build a 16v turbo engine producing between 180 and 200 hp primarily used for track days with the odd weekend road blast thrown in,consistantly using every inch of an 8000rpm rev limit, would you use a billet crank or a worked a plus job?
Edited by minimole23 on 22nd Feb, 2012. On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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 8297 Posts Member #: 408 Turbo Love Palace Fool Aylesbury |
22nd Feb, 2012 at 11:22:40pm
Ive done about 5k in mine so far, most of the time driven in anger and the crank has been fine. It has been lightened wedged etc and balanced.
https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel
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 4890 Posts Member #: 1775 Post Whore Chester |
23rd Feb, 2012 at 12:20:32am
On 12th Oct, 2011 paul wiginton said:
On 12th Oct, 2011 Vegard said:
If I was using a 6" rod, I'd get a forged one.... Id get 4 Maybe V has three and is looking to snaffle a 4th? Edited by gr4h4m on 23rd Feb, 2012. I run a supercharger and I don't care the TB is on the wrong side.
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4309 Posts Member #: 1321 Post Whore Wiltshire |
23rd Feb, 2012 at 08:40:54pm
On 22nd Feb, 2012 matty said:
Ive done about 5k in mine so far, most of the time driven in anger and the crank has been fine. It has been lightened wedged etc and balanced. In my opinion they are more than up to the job after they have been worked. And being a weekend warrior and track car its not likely to be used in such a way to rack up high mileage for fatigue to kick in.  Well the clincher for me is looking at the price of forged and billet cranks nowadays, I'll be sticking with a worked a plus and limiting the engine to 8k I think, can't justify blowing 2k on a bottom end! On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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1083 Posts Member #: 8932 Post Whore |
23rd Feb, 2012 at 11:21:06pm
Doesn't jimster use a modified standard crank in his k turbo? if so then surely thats enough proof, as he gives his some proper track use. |
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8297 Posts Member #: 408 Turbo Love Palace Fool Aylesbury |
23rd Feb, 2012 at 11:48:00pm
I think jims running a EN40 crank in his. My crank has also had resized big ends as im running S rods too
https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel
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 684 Posts Member #: 9590 Post Whore Derby |
24th Feb, 2012 at 07:38:18am
Me, I probably wouldn't risk it. I'd go all steel. Like said earlier the reason lots of turbo engines don't run steel cranks is because they dont need to rev as high to produce good power. But having said that, its the sustained rpm that kills them.
Matt W
On 14th Mar, 2012 mw3 said:
Got a nice big delivery from Carl at Force Racing today. |
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
24th Feb, 2012 at 08:21:41am
theres soo many variables on this....
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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 412 Posts Member #: 9766 Senior Member Warwickshire |
24th Feb, 2012 at 08:40:21am
I've run a worked a+ crank for 3 years of rwybs, trackdays and roadmiles and it's been fine, its on a 4.1 so it reguarly see's 8200rpm with the hardcut set at 8400 rpm with no issues. Avon 2010 class c 3rd
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3006 Posts Member #: 2500 Post Whore Buckinghamshire |
24th Feb, 2012 at 09:47:50am
Robert will testify that the inline 1275 engine in my car revs its nuts off all the time (I use 7000rpm+ regularly) and its on standard Midget crank,rods and MT pistons.
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 7265 Posts Member #: 1268 The Boom Boom speaker Police! Essex |
24th Feb, 2012 at 09:52:02am
Mines a standard 6582 crank and standard rods, nothing is balanced.
In the 13's at last!.. Just |
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248 Posts Member #: 7936 Senior Member DK-8450 Hammel. Denmark |
24th Feb, 2012 at 10:01:28am
On 11th Oct, 2011 minimole23 said:
Better find out if John K is doing a 6 inch rod yet. Not to high jack, but on 6" rods try to look http://www.7ent.com/products/pauter-forged...en0019-set.html I know that "Pauter" build some hot engines. If i have more toys than you when i die, I WIN |
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
24th Feb, 2012 at 10:01:44am
On 23rd Feb, 2012 matty said:
I think jims running a EN40 crank in his. My crank has also had resized big ends as im running S rods too (well the cheaper same part number midget ones) lol . Jimster may well confirm, but I thought he was using a standard Turbo crank. So basically a hardened CAM6232. Happy to be proven wrong. You only have to look at an SH Engineering Miglia crank to see how much is taken out of a standard crank and survives a full season Miglia racing, after which it is pretty much done. 
Edited by Sprocket on 24th Feb, 2012. 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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