Dyno tuning ST185

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Dyno tuning ST185

Postby dvsone » Thu Jan 29, 2015 3:11 am

Hi Guys,

Not sure if i have posted this in the right place but i have a ST185 that i have just finished rebuilding the engine on. I have kept most of the internals original just opting for a set of forged pistons, MLS head gasket and some minor porting on the head.
Now that it is all back together i was looking at putting it on a dyno and increasing the boost.

My question is does anyone know a good AWD dyno in Melbourne or anywhere that specialises in these cars? Also can the standard ecu be tuned or will i need an aftermarket one and how much boost should i put into it with just these mods?

Thanks heaps for any info
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Re: Dyno tuning ST185

Postby Smaay » Thu Jan 29, 2015 2:01 pm

you can put the car in FWD mode for dyno work. the selector is on your transmission. DO NOT DRIVE in this configuration, but dyno is ok
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Re: Dyno tuning ST185

Postby dvsone » Thu Jan 29, 2015 9:17 pm

If i do that wont it give incorrect power figures as it is reading from the front wheels only?
And any recommended places in Melbourne to do this?
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Re: Dyno tuning ST185

Postby underscore » Fri Jan 30, 2015 6:17 am

The crank HP will be the same, WHP will be wrong but can be calculated. Both are only good for bragging rights.
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Re: Dyno tuning ST185

Postby dvsone » Sat Jan 31, 2015 6:13 am

ok cool and it wont mess with the tuning when i switch back to 4wd? I assume the load on the engine is the same either was and it is just the gearbox that makes the diff?
Do you know any good ECU to get keeping in mind it will just be a quick street car so not looking to go crazy and get a motec or anything or do you recommend just doing boost runs on the dyno with the standard ECU and see what i can get out of it?
Thanks again for your help
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Re: Dyno tuning ST185

Postby underscore » Sat Jan 31, 2015 8:05 am

Exactly, if you can find someone with an inertia dyno they could probably increase the load on the car to simulate the extra drag of AWD. As far as ECUs go always find a local tuner that you trust and find out what ECUs they can tune, many times I've seen people select and install an ECU only to find the nearest tuner is stupidly far away.
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Re: Dyno tuning ST185

Postby dvsone » Sat Jan 31, 2015 7:05 pm

Ok cool thanks underscore i'll do some searching and see what dyno places are around and go from there.
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Re: Dyno tuning ST185

Postby C-dubb » Sat Jan 31, 2015 7:53 pm

Careful...BADNEW5 was telling me he attempted this at one point and the rear wheels started to spin...not sure how safe it is. I was thinking of doing it also. But we have a couple AWD dyno's around now.
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Re: Dyno tuning ST185

Postby dvsone » Thu Feb 05, 2015 7:39 am

Yeah i have been told by a guy who specialises in these cars that the 2wd lock is only for modest dyno work and testing and if you use it for power tuning you can snap the front diff coupling so i will go for a 4wd dyno
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Re: Dyno tuning ST185

Postby ChrisD » Sat Feb 14, 2015 4:14 am

I had mine tuned in 2WD mode, worked fine. The only failures I have seen have been people that didn't do the switch properly, or on high HP setups. WHP was pretty consistent for me although I didn't tune back to back on an AWD dyno.

I'm running a 205 trans now so I don't have the option anymore.
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