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Discussion Starter · #1 · (Edited)
The following are number/stages from the 1991 HKS catalog. These stages were dyno tested on a MX6 that was stock and modded for each stage. It shows what each mod will do for boost and final HP.

Stage I

K&N Airfilter
Upgraded 60mm Exhaust without cat or highflow cat
10.5 psi making 163hp

Stage II

All the above plus
Electronic or Manual Boost controller
Boost Gauges (recomended)
Upgraded Plugs/Wires (recomended)
Upgraded Clutch (recomended)
12 psi making 178hp

Stage III

All the above plus
Intercooler Pipe Uggrade
Upgraded Oil cooler (recomended)
Upgraded Ignition (MSD or like) (recomended)
12 psi making 187hp

(IC Pipes make about 9 HP!)

Stage IV

All the above plus

Programmed Fuel Computer (or chip)
EGT (Exchause Temp Guage) (recomended)
15.5 psi making 222hp

Stage V

All the above plus
Additional Injector Controller (AIC) Units
Upgraded Fuel Pump
Upgraded Fuel Pressure Regulator
Upgraded Injectors
18 psi making 237hp


These upgrades were all done using the stock turbo. Pictures of this and also a MX6 doing the Pikes Peak run can be found at my webiste at http://www.geocities.com/black88mx6/pictures/MX6/88_MX6_GT/
 

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That's really cool, Manifest! Thanks for digging up the info!
 

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Did they mention if those were the #'s at the wheels, or did they estimate that to be at the crank?? I am guessing that my engine is pretty tired at 171K miles, no wonder even with an upgraded turbo I am 40hp shy of those #'s:(
 

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Hey Manifest.....

is that the corksport lower rear tie bar? Let me know maybe I'll pick one up. I thought it was flat not round, this way it'll make my suspension complete.

Thanks,
 

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Discussion Starter · #9 ·
This was done on a stock fwd MX6; they did not rebuild or upgrade the engine in any way besides what is listed in each stage.
 

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Discussion Starter · #10 ·
Yes; it is the CS rear tie bar, and yes it is flat.

If you take a look at the HP numbers; you know that our car is 145hp stock. Add the upgraded airfilter and exhause and we all know that adds just under 20hp to our car (aka Stage I). If you know where the 145 number was taken from you know that these numbers were taken at the same location.
 

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These numbers are all good but keep in mind these were back in the day when the engines were still pretty fresh. Itjust goes to show that our ten year old dogs when rebuilt got lots of power with the stock turbo. Can't wait to rebuild.
 

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PGT-TURBO said:
These numbers are all good but keep in mind these were back in the day when the engines were still pretty fresh. Itjust goes to show that our ten year old dogs when rebuilt got lots of power with the stock turbo. Can't wait to rebuild.
I wouldnt be too sure about that. I would believe my engine, for example to make even more power than stock. It's got the compression of a new engine (150psi evenly balanced across all 4), and due to the high mileage, there's a lot less friction going on. Just a thought!
 

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Yeah, if you check long-term test vehicles in Automobile, Car and Driver, or Motor Trend, they all make more power after about 40K miles than when new. Less friction.
 

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Those are wicked numbers, it looks like it is pretty easy for us to get quite a bit extra hp with a few mods. I am going to save the thread and see how much I can get done during the summer. I would like to get to 187 hp but budget could be a little tight for that.
 

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maybe because some ppl like my self have never seen them?
 

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Ive never seen this thread either.

Is this all on the stock turbo??

As for the oil cooler upgrade, do they make them for our cars or do you have to have a custom/universal one put in.

I was thinking of moving mine to the front of the car. I hear there right around the oil filter. Seems to me like its not getting much air there??
 

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Umm the oil cooler is a small black round donut looking thing behind the oil filter. It is cooled by the engine coolant, not air. Good luck trying to move it to the front.

As for an aftermarket, go with a small universal air-cooled one from napa or anywhere. I think theyre around $40 for a decently sized one. The only problem is where you're going to plumb oil to and from. Possible the turbo feed line?
 

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If you plumb into the turbo lines you need to do it on the oil return lines because you don't want to mess with the oil pressure going into the turbo but cooling after will have a overall effect on the engine. Helps make the turbo last a little longer. I haven't seen this thread either. Is there a online archive for the 91 issue?
 
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