Inter cooler dyno figures

Submitted: Tuesday, Apr 01, 2008 at 20:36
ThreadID: 56161 Views:1785 Replies:8 FollowUps:7
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G'day all, some of you may remember Andrew Wills GU inter cooler mods back in February, well I finally got some time to dyno the old and the new.


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The dyno figures are: Old. max HP. 132.3 hp
max torque 400 lbft
max boost 11.6 psig

Modified. max HP 141.2 hp
max torque 441 lbft
max boost 12.8 psig

The only thing changed was the inter cooler, the runs done within half an hour of each other. Well done Andrew. Now for the water to air inter cooler, then the gas, lol.

John

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Reply By: howesy - Tuesday, Apr 01, 2008 at 21:06

Tuesday, Apr 01, 2008 at 21:06
Just my own preference and opinion but looks like figures alone dont do the mods justice. 6.6367 kw gain as a figure is not over the top although the 55 Nm of torque if it came in low would be the big seller. Seeing the torque curve on the dyno sheet would probably really show the difference. hope you can get it up would be interesting to see and would more than likely really do justice to the mod..

Looks awesome though, hopefully it drives just as good.
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Follow Up By: Member - John - Tuesday, Apr 01, 2008 at 21:17

Tuesday, Apr 01, 2008 at 21:17
Howesy, as soon as I figure out how to post the dyno sheets, I will. Yes, it does drive better, not a lot, but better. John
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Follow Up By: Trevor R (QLD) - Wednesday, Apr 02, 2008 at 09:21

Wednesday, Apr 02, 2008 at 09:21
Howesy,

How do you calculate kw from hp and Nm from ftlb. I have always been confused with different dyno readouts and wanted to compare apples with apples.

Thanks Trevor.
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Follow Up By: John S (NSW) - Friday, Apr 04, 2008 at 20:57

Friday, Apr 04, 2008 at 20:57
1Kw = 1.341 HP
1Nm = 0.737 lb ft

I use this converter
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Reply By: lakedge - Tuesday, Apr 01, 2008 at 21:07

Tuesday, Apr 01, 2008 at 21:07
Looks very neat. Pardon my ignorance, but how do you simulate the airflow and at what rate of airflow did that improvement occur? Did you chill the air, or was it at ambient temp?

John.
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Follow Up By: Member - John - Tuesday, Apr 01, 2008 at 21:20

Tuesday, Apr 01, 2008 at 21:20
lakedge, no air flow, was just a power run to check the improvement in i/c efficiency. John
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Reply By: awill4x4 - Tuesday, Apr 01, 2008 at 22:27

Tuesday, Apr 01, 2008 at 22:27
Interestingly, what John's dyno sheets do show is just how restrictive the standard TD6 intercooler actually is. On the dyno run with the standard cooler the revs got to about about 2750 and the boost pressure fell in a hole suggesting the intercooler couldn't handle the air at the high/er boost levels.
The one I built however however the boost pressure curve evened out to be a flat as texas.
One other thing that John didn't mention is the dyno run with the modified cooler was done on a hot engine and intercooler with about 10 or so minutes of heat soak going into the intercooler before the dyno run. The standard intercooler was fitted and was cool before its run so the results would probably be even better.
A 10% gain in torque is nothing to be sneezed at though, and with lower EGT's there's room for playing with the fuel pump specs.
Regards Andrew.

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Follow Up By: Member - John - Tuesday, Apr 01, 2008 at 22:42

Tuesday, Apr 01, 2008 at 22:42
Thanks Andrew
John

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Follow Up By: Trevor R (QLD) - Wednesday, Apr 02, 2008 at 09:29

Wednesday, Apr 02, 2008 at 09:29
To me, the figures only back up what the job looks like.......very nice indeed. As you said 10% increase in torque (probably over a broader range in revs) is quite impressive. There definatly is room to move with both boost and pump if you are running lower EGT's. I have been running 14psi (measured at the inlet manifold) for 150 000km with no side effects and now have 352 000km on the clock, so if it is going to show any side effects it should be showing on my older donk I would think. Especially considering I use all my neddies all the time hehehehe (why have em if you don't use em hey?).

Love your work Andrew, very jealous John.
Trevor.
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Reply By: Truckster (Vic) - Wednesday, Apr 02, 2008 at 11:42

Wednesday, Apr 02, 2008 at 11:42
John, gimme a call tonight if you can.. I've left me mobile at home with ya number in it.. :(
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Reply By: Member - John - Wednesday, Apr 02, 2008 at 18:16

Wednesday, Apr 02, 2008 at 18:16
For those wanting a good conversion program, the following is pretty good.

Conversion Programme
John

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Reply By: awill4x4 - Wednesday, Apr 02, 2008 at 22:07

Wednesday, Apr 02, 2008 at 22:07
I've just got a copy of John's dyno figures from the Dyno guys next door at work and I've scanned them and posted them below.
The 1st image shows Torque and Power the 2nd shows Power and boost pressure.
Regards Andrew.

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Reply By: Member - Bradley- Friday, Apr 04, 2008 at 19:12

Friday, Apr 04, 2008 at 19:12
Yep, you can see when the standard units flow becomes overly turbulent and drops off. This unit will really come into its own when on the move under load.

Now for a full dyno tune :-)


Awesome work Andrew, beautifull bends. Very neat.
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Reply By: Isuzumu - Friday, Apr 04, 2008 at 21:20

Friday, Apr 04, 2008 at 21:20
John, at the end of the first thread you say "now for the air to water intercooler" I am saving for a PWR air to water intercooler and am interested in the difference in performance between them
So looking forward to your test.

Cheers Bruce
Cheers Bruce
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Follow Up By: Member - John - Friday, Apr 04, 2008 at 21:39

Friday, Apr 04, 2008 at 21:39
Bruce, I am not using the PWR one, will be using a different one, but with PWR core. It will be interesting to see the difference between the three types. Hopefully, the new inter cooler will be ready in a week or so, maybe longer, depends on Andrew's work load...... Will certainly post some pics and the figures when completed. John
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