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Registered:
May 2004
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Disappointing Supra Dyno
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Mon, 22 November 2004 07:26
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Hi all,
I own a 1986 Toyota Supra Twin Turbo. It is a GA70, and has a 1G-GTEU in it.
I purchased it about 8 months ago and the previous owner had taken very good care of this car, it is in prestine condition and he had carried out the following work:
Auto to manual conversion (W58)
Full engine rebuild with chrome faced piston rings, flowing, porting and polishing of the cylinder head.
Rebuilt turbos (2x CT12)
2.5" exhaust system excluding downpipe (no cat converters)
I have all receipts for the work.
Since then I have replaced the downpipe with a 2.5" pipe, replaced all filters and oils - including fuel filter, I run the car on magnatec, replace the oil religiously every 5,000km and use genuine Toyota filters. I work for the Toyota dealership here in New Zealand and have always used genuine parts when I can. I have installed a K&N panel filter and a turboxs boost controller (currently running at 10psi). I've checked out basic ignition components and they all seem to be testing okay, I put a new set of platinum spark plugs in just to be sure.
The engine feels strong and although not as powerful as some other turbocharged cars I have been for a ride in it does go well, blows no smoke etc.
Last saturday night I decided to put my car on the dyno for the first time, my mates dad owns a workshop with a dyno and although it is a very old style dyno (doesn't give you a graph with torque/kw and air:fuel ratio like the newer ones) it still does the job, his dad just writes down the various torque/horsepower figures at the various rpm's throughout the revrange. It basically has gauges with needles. I didn't find out what my air:fuel mixtures were throughout the run.
Initially as the car was brought up to peak power it developed a minor misfire, which he thought to be fouled plugs from babying the car around in traffic for the last couple of days.
As we brought the car up once again to max power the misfire was gone but I did notice the car blowing some black smoke at max power, now I realise that factory engine management does give a very rich mixture on boost to protect itself from detonation.
Max power was 136 horsepower, or 101.5 kilowatts.
This in my opinion is pathetic. The car doesn't feel like it's a 136 horsepower car, all my workmates from work who have been for a ride say it definitely doesn't feel like a 136 horsepower car. I'm wondering whether the calibration of the dyno is incorrect, so maybe I should try one of the newer types of dynos here in New Zealand. Other cars that night on the dyno - for example Skyline GTS25t - which looked to be reasonably stock except for exhaust - made 290 horsepower.
I suppose I need to confirm the power output on another dyno but if it is still a problem then I guess I need to start looking at if the car has an overfueling problem and perhaps run a compression test through the car. The idle is sometimes a bit 'poppy' but the car is very smooth throughout the revrange and generally runs very well.
Anyway I'm sorry for the very lengthy post but I'd really like to get to the bottom of it. Perhaps I'll see if I can get dynod on another dyno this weekend and get back to you guys with my results.
Cheers,
Mike.
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| | Subject | Poster | Date |
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Disappointing Supra Dyno
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Crimson Tears | Mon, 22 November 2004 07:26 |
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Re: Disappointing Supra Dyno
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justcallmefrank | Mon, 22 November 2004 08:47 |
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Re: Disappointing Supra Dyno
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IRA11Y | Mon, 22 November 2004 08:52 |
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Re: Disappointing Supra Dyno
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CrUZsida | Mon, 22 November 2004 23:08 |
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Re: Disappointing Supra Dyno
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mrshin | Mon, 22 November 2004 11:48 |
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Re: Disappointing Supra Dyno
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Bugman | Mon, 22 November 2004 21:22 |
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Re: Disappointing Supra Dyno
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indian | Mon, 22 November 2004 22:07 |
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Re: Disappointing Supra Dyno
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BLK1GGTE | Mon, 22 November 2004 22:51 |
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Re: Disappointing Supra Dyno
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gold28 | Mon, 22 November 2004 23:21 |
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Re: Disappointing Supra Dyno
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MR 1JZ | Mon, 22 November 2004 23:46 |
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Re: Disappointing Supra Dyno
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Dylo | Tue, 23 November 2004 02:41 |
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Re: Disappointing Supra Dyno
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Dabbid | Tue, 23 November 2004 13:04 |
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Re: Disappointing Supra Dyno
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indian | Tue, 23 November 2004 21:59 |
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Re: Disappointing Supra Dyno
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Dabbid | Wed, 24 November 2004 08:38 |
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Re: Disappointing Supra Dyno
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MR 1JZ | Wed, 24 November 2004 09:16 |
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Re: Disappointing Supra Dyno
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Dabbid | Wed, 24 November 2004 11:38 |
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Re: Disappointing Supra Dyno
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Dirty_Sanchez | Tue, 23 November 2004 23:33 |
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Re: Disappointing Supra Dyno
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indian | Tue, 23 November 2004 23:40 |
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Re: Disappointing Supra Dyno
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Gr33nM0nk3y | Wed, 24 November 2004 01:21 |
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Re: Disappointing Supra Dyno
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Looonie | Wed, 24 November 2004 01:18 |
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Re: Disappointing Supra Dyno
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indian | Wed, 24 November 2004 01:30 |
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Re: Disappointing Supra Dyno
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MR 1JZ | Wed, 24 November 2004 02:05 |
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Re: Disappointing Supra Dyno
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indian | Wed, 24 November 2004 02:12 |
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Re: Disappointing Supra Dyno
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justcallmefrank | Wed, 24 November 2004 01:37 |
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Re: Disappointing Supra Dyno
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MR 1JZ | Wed, 24 November 2004 02:17 |
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Re: Disappointing Supra Dyno
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indian | Wed, 24 November 2004 02:23 |
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Re: Disappointing Supra Dyno
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justcallmefrank | Wed, 24 November 2004 02:26 |
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Re: Disappointing Supra Dyno
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AE86slut | Wed, 24 November 2004 06:33 |
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Re: Disappointing Supra Dyno
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MR 1JZ | Wed, 24 November 2004 06:44 |
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Re: Disappointing Supra Dyno
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indian | Wed, 24 November 2004 21:42 |
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Re: Disappointing Supra Dyno
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MR 1JZ | Wed, 24 November 2004 02:55 |
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Re: Disappointing Supra Dyno
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Dylo | Wed, 24 November 2004 03:22 |
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Re: Disappointing Supra Dyno
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Looonie | Wed, 24 November 2004 03:40 |
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Re: Disappointing Supra Dyno
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Norbie | Wed, 24 November 2004 03:45 |
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Re: Disappointing Supra Dyno
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Crimson Tears | Wed, 24 November 2004 05:52 |
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Re: Disappointing Supra Dyno
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indian | Wed, 24 November 2004 05:54 |
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Re: Disappointing Supra Dyno
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Crimson Tears | Wed, 24 November 2004 05:57 |
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Re: Disappointing Supra Dyno
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Chris Davey | Wed, 24 November 2004 06:53 |
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Re: Disappointing Supra Dyno
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Siktoy ra23 | Wed, 24 November 2004 07:21 |
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Re: Disappointing Supra Dyno
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MR 1JZ | Wed, 24 November 2004 22:15 |
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Re: Disappointing Supra Dyno
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indian | Wed, 24 November 2004 22:57 |
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Re: Disappointing Supra Dyno
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Dirty_Sanchez | Wed, 24 November 2004 22:30 |
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Re: Disappointing Supra Dyno
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dcving | Wed, 24 November 2004 22:37 |
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Re: Disappointing Supra Dyno
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MR 1JZ | Wed, 24 November 2004 22:42 |
