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Old 02-27-2004, 18:33   #1 (permalink)
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Wink Tuning for Torque

Any tips for tuning an EB2 for torque?

Most of the mods I've seen here are angled toward increasing KW output rather than NM output.

Extractors? Brand/value for $$$?
Exhaust? 2.25 or 2.5 inch?
Cam?
Other bolt-on goodies?

Is there much point in installing extractors WITHOUT upgrading to a 2.5 inch system?

Assuming modifications will be phased in, which should be done first?

Looking forward to the argu... errr... discussion
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Old 02-27-2004, 18:55   #2 (permalink)
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Re: Tuning for Torque

First thing to do is cold air intake and a good exhaust(2.5 inch), and a good set of extractors(Pacemakers).
If you are going for more torque, get the smaller extractors.

Then if you want serious N/A tourque, get some head work done, mainly compression increase, then get a custom grind cam to suit.

Or, go bolt on a supercharger for bulk tourque under 3000rpm.
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Old 02-27-2004, 19:29   #3 (permalink)
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Re: Tuning for Torque

Throw on a JMM DEV2 kit, and convert it to a BBM manifold set up from a EF/EL.
For good torque, air speed is critical, not air volume.

Or as 'SVO XR6' said, throw a blower on it.

Rick.
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Old 02-27-2004, 19:48   #4 (permalink)
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Re: Tuning for Torque

Torque monster cars typically have high compression and turbo'd (i'm using my example based on a diesel 4x4). I think the Land Rover Defender is 19.5:1 compression + turbo'd on diesel.

So I'd figure to make some good torque but not shooting for sky high power and race indurance aim for a compression ratio higher than 9.5:1 and force the induction.

Then again I could be talking out my arse
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Last edited by ianmcginley; 02-27-2004 at 19:49. Reason: YMMV
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Old 02-27-2004, 20:12   #5 (permalink)
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Re: Tuning for Torque

ianmcginley -
You're sort of talking out of your ass......
Yes it is true that high C/R or blown forced inducted engines give good torque, however not both together. Forced engines must have low C/R, the 2 don't go together.

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Old 02-27-2004, 21:33   #6 (permalink)
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Re: Tuning for Torque

If you seroiusly want lots more torque Supercharging will probably do the most for your money but its $6k.

I had really good results with the pacemakers 4480 extractors on my AU. I got a clear 10rwkw gain to go from 106 to 116rwkw. More interestingly for you at 2250 rpm I had 8rwkw gain which gradualy dropped to 2rwkw at 3000rpm to 3800rpm and then the gain of 10rwkw kicked in sharply. What this tells me is SOXX is correct the BBM manifold is the first thing you should do. My AU has a BBM manifold and the extractors helped everywhere except where the BBM manifold worked well. I am guessing I would have got a 2rwkw gain from the 2.5" exhaust on its own and the rest of the gains were the Pacemaker 4480's.

Be careful with cams though the power is there but in every day driving I am not sure I really need or appreciate it that much. Happines for you might be with a stock cam, a BBM manifold, Pacemakers 4480 or JMM race series extractors with a 2.5" exhaust. Be careful with muffler selection and keep the resonator or the noise may bother you particularly at the low revs where th torque is.
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Old 02-29-2004, 03:58   #7 (permalink)
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Re: Tuning for Torque

Quote:
Originally Posted by batfastard
Most of the mods I've seen here are angled toward increasing KW output rather than NM output.
bit of confusion here, there is no such output as a kilowatt, a dyno measures the rotation speed of the tyres, and measures how hard it can turn them (NM).. so to increase the kw reading, you have to increase the nm output, OR, increase the rpm at which that nm output happens...

so, every mod you do to make your car faster is actually increasing the NM ouput....

where people get confused is they all think that the low down power you can feel is the torque, and top end being kw... when actually, the only output you can feel is the torque -regardless of what rpm your doing, the torque is whats making you move...
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Old 02-29-2004, 04:44   #8 (permalink)
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Re: Tuning for Torque

Quote:
Originally Posted by ianmcginley
Torque monster cars typically have high compression and turbo'd (i'm using my example based on a diesel 4x4). I think the Land Rover Defender is 19.5:1 compression + turbo'd on diesel.

....

Then again I could be talking out my arse
Bearing in mind that a diesel requires that level of compression to work. Just some people might not realise that diesels have higher compression due to their design..

In general terms that is..

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Old 03-01-2004, 14:07   #9 (permalink)
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Re: Tuning for Torque

Quote:
Originally Posted by ebs_4l
bit of confusion here, there is no such output as a kilowatt, a dyno measures the rotation speed of the tyres, and measures how hard it can turn them (NM).. so to increase the kw reading, you have to increase the nm output, OR, increase the rpm at which that nm output happens...

so, every mod you do to make your car faster is actually increasing the NM ouput....

where people get confused is they all think that the low down power you can feel is the torque, and top end being kw... when actually, the only output you can feel is the torque -regardless of what rpm your doing, the torque is whats making you move...
No, upper rpm's are measured in HP/KW, a figure derived from the torque output but its still an independant figure. Because RPM is involved in the equation low RPM's will give far lower readings hence the torque figure is used to represent a cars power before the HP readings come into effect.

Please everyone have a read of this:
http://www.epi-eng.com/PwTq.htm
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Last edited by xdc351; 03-01-2004 at 14:19.
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Old 03-01-2004, 19:30   #10 (permalink)
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Re: Tuning for Torque

What alot of people dont realise is that in _most_ applications, torque goes up in near perfect proportion to power (Kw). This is all based on the design of the engine internals (the offset of the crank and the bore of the cylinder). So any mods you do to gain extra pwoer will in fact pump your torque up.
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