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 824 Posts Member #: 2065 Post Whore Wiltshire |
28th Feb, 2011 at 10:18:06am
What power can you safely run through a helical box? Let's say it's fitted with sc drops and a four pin diff...
On 7th Nov, 2011 apbellamy said:
Shaft seems nice and snug On 24th Mar, 2012 apbellamy said:
no no no no, you need more boost! you can never ever come on here and say I have enough boost, that's just silly. On 29th Mar, 2010 Star Mag said:
these give no problems with good head |
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Site Admin  15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
28th Feb, 2011 at 10:21:47am
A few on here have proved the helical box is OK with good power, that is if it is in good condition, an old shagged one will not last long. As you say the helical gears are stronger in the gear teeth themselves due to greater area in the tooth root, HOWEVER, the helical tooth form does inherently create side loading on the gearbox casing, which can start to be a problem with big torque.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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4309 Posts Member #: 1321 Post Whore Wiltshire |
28th Feb, 2011 at 10:26:13am
Well it seems helical boxes can take 140hp, but for how long depends on abuse history, condition of bearings, and treatment really. After all most components have already completed one lifecycle in their original engine.
On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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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 |
28th Feb, 2011 at 10:33:56am
The metro van ran 150bhp without destroying the helical box over a few thousand miles. It had a 4 pin diff and s/c drops. I believe it had been refurb'd relativly recently, but that wasn't done by us so can't say for sure. 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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 7265 Posts Member #: 1268 The Boom Boom speaker Police! Essex |
28th Feb, 2011 at 11:07:37am
Wintersurfer is putting 150 nanas through an old GT box with a cross pin and SC drops. It's holding up fine after 1000 miles. In the 13's at last!.. Just |
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824 Posts Member #: 2065 Post Whore Wiltshire |
28th Feb, 2011 at 11:07:40am
I'm aiming for 200bhp so a rebuilt box is defiantly on the cards for sure.
On 7th Nov, 2011 apbellamy said:
Shaft seems nice and snug On 24th Mar, 2012 apbellamy said:
no no no no, you need more boost! you can never ever come on here and say I have enough boost, that's just silly. On 29th Mar, 2010 Star Mag said:
these give no problems with good head |
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3594 Posts Member #: 655 Post Whore Northern Ireland |
28th Feb, 2011 at 11:39:43am
On 28th Feb, 2011 almichie said:
What power can you safely run through a helical box? Let's say it's fitted with sc drops and a four pin diff... My thoughts are helical are stronger due to the total contact surface area of the gears? I might be talking out of my arse here and have that completely wrong! But isn't the sccr just for less train loss? Thanks in advance helical drops will outlast the gearset, and likely the diff. 9.85 @ 145mph
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 1596 Posts Member #: 8027 Post Whore Thrapston, Kettering, Northants NN14 |
28th Feb, 2011 at 12:21:22pm
You have to take materials into account te sc gearset may be a better grade or better treated which then makes up for less surface area. On 17th Feb, 2011 apbellamy said:
I popped my first one out the other day... |
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302 Posts Member #: 60 Forgotten more than most ever know |
8th Mar, 2011 at 12:10:13pm
Over 30 K miles |
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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 |
8th Mar, 2011 at 12:11:37pm
On 28th Feb, 2011 apbellamy said:
The metro van ran 150bhp without destroying the helical box over a few thousand miles. It had a 4 pin diff and s/c drops. I believe it had been refurb'd relativly recently, but that wasn't done by us so can't say for sure. With the exception of a destroyed input shaft bearing, all was well. 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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