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Lizard

I got a change to Dyno the 81 928 with 86 engine running on MSII V3.0 w/ EDIS

I still need to do some tuning on the car, so there is more to be had esp lower in the RPM band. However that being said.

With standard Dyno correction the car pulled 296.5 RWHP and 316.3 RW FT LB. Considering that these engine are rated at 288 crank horse, and 290 crank ft lb, this turned a few heads.
some of the 85/86 with a better exhaust, chips and in perfect tune/running order have pulled around 260-270 RWHP however so I would say it is safe to say that these engines were severly under rated from the factory.

All runs were done in 4th gear btw
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3 928s,

bass gt · Posted: Mon Jun 25, 2007 4:34 am Post subject:

Lizard,

It seems Porsche always low ball their engine outputs. There has been a constant occurence of guy's testing their cars over here and to find them consistently way over stated BHP. For example, a GT3 is listed at 381. Now it seems this is a bit condservative, as every car comes out at 402-407 bhp.
Now Ferrari on the other hand......

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

OOoooo! NASTY!!! Fun ride I bet

Todd
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'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

Nice results!
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1987 951 - M193 Version for Japan

Min · Posted: Mon Jun 25, 2007 5:50 am Post subject:

Post a digital cam picture of the dynochart lizard.

Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

Min...what..you dont belive him ?

a picture would be nice to see how the graphics of the torgue and power spread over the rpm range.
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Supercharger and EFI kits
https://www.the924.com

Min · Posted: Mon Jun 25, 2007 7:40 am Post subject:

dpw928 · Joined: 02 Nov 2002 Posts: 1860 Location: owasso, ok 74055

Lizard, great numbers.

Agree that Porsche underates their engines. When the 78 model 928's only had 220 HP but 300+ ft lbs of torque, something is amiss.

Dennis
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81 931 5 sp
78 928 5 sp Silver
78 928 AT Euro Black

Tigger937 · Posted: Mon Jun 25, 2007 9:29 am Post subject:

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

hope I get the same results with my 81 924NA combined with MS1v3.

guess not

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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

Lizard · Posted: Mon Jun 25, 2007 10:28 am Post subject:

The sheet printed was while the comp was in SAE correction

so as you can see SAE correction worked out to be 285.8RWHP and 304.4 RW FT LBS
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3 928s,

Min · Posted: Mon Jun 25, 2007 10:35 am Post subject:

Very nice.

Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.

Lizard · Posted: Mon Jun 25, 2007 10:39 am Post subject:

bass gt · Posted: Mon Jun 25, 2007 11:20 am Post subject:

Lizard,

Forgive my ignorance, I'm not up to spped on the mods to your motor. If however it is stock, 70 over stated IS a big jump, but what the hell, more is always better than less

Re the dips. Dont start getting too bent out of shape over them. Most older cars show this trait. it tends to be a characteristic of the intake system. It's often the way the air flow acts in the plenum. Hence the modern intakes such as varioram, that change their flow dynamics to optimise both low and high rpm flow. i would seriously doubt you are suffering from detonation. ut it might be worth just playing around with /fuellingin these areas to be sure. A good wideband sensor would be the ideal way of being sure.
Anyhoo, good job.

Steve

Lizard · Posted: Mon Jun 25, 2007 12:44 pm Post subject:

The intake, and motor are bone stock no mods at all,

I had that dip on all runs, I will be changing the fuel filter and I have replaced the plugs and am now running a .045 gap on them which seems to have helped.

I am also running 1 deg of retard on both cams btw. So that will aid me alittle but not too much.

I do have a WB sensor, however according to the dyno (owner I trust and is a personal unit not a shop) mine is off, at idle I read 13.2-13.4 afr and he shows 14.7 roughly. I will be confirming my AFR between the MS and the LC1 very shortly though.

I went on a run down to oregan yesterday (was up at 6:00am after going to bed at 11:00pm) and didnt get home till 5:20 AM so it was almost a 24 hour day, and the majority of the day was on back roads in WA having an absolute blast. But right now my mind is shutting down, and not working so well.
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3 928s,