Euro Model 928 Porsches

[PorscheFanatic]

Is the VIN code of 92A0820890 a true 1980 928 Euro model with the 300 horsepower motor? thanks for anyone's reply.

john

[928ram]

yes; indicated by the second "2" in the VIN. See my reply in the "VIN decoder for 1980" thread for more detail.

[PorscheFanatic]

Thankyou very much.

- john

[m21sniper]

Did the 80 euros have that much HP?

I thought they were 265hp?

[PorscheFanatic]

Yes, the 80 - 82 Euro 928 was 300 HP, while the 83- 84 Euro was 310 HP. Incredible cars for the money now.

[m21sniper]

Be careful with em though. The Euros are interference motors.

Also keep in mind that is DIN HP, not the US Std SAE, which is a bit misleading
For instance the 234SAE HP 83 928S is only .5 slower in most performance categories than the much lighter, "much more powerful" 310hp Euro model of the same year.

The performance gap should be more along the lines of a full second 0-60 and Quarter Mile, and the top end should certainly be more pronounced than 6mph, but it's not.

They are a tremendous value though.

[PorscheFanatic]

Thanks for that reply, Sniper. I wasn't aware that the horsepower ratings of Euro and US weren't apples to apples. I own also an '83 928S US with the 234HP. I am getting my 300HP '80 928S Euro in a week. It will be interesting to see what the actual real power difference is. I was hoping the Euro would be a beast, but perhaps as you say, its not that much faster than the US version.

[PorscheFanatic]

Does anyone know what the horsepower rating is for the 1977 - 1979 928 Euros??

[m21sniper]

Performance specs for all models of 928s from the 928 specialists website:

https://www.928gt.com/default5.htm

Specs for 80 and 83 models, all trans types, Euro and US(in seconds)

83 US 4spd A/T: 0-60: 7.2, 1/4 mile: 15.5
83 US 5spd: 0-60: 6.8, 1/4 mile: 15.2

80 Euro 3spd A/T: 0-60: 7.7, 1/4 mile: 16.2
80 Euro 5spd: 0-60: 6.6, 1/4 mile: 15.2

As you can see, the US 83 5spd is everybit as fast as the 80 Euro 5spd, and the 83 US A/T is FASTER than the 80 Euro.(the 83 US A/T model has an extra gear)

Now compare those figures with the 1985 5.0 liter 32V US model, at "only" 288 SAE net HP(in seconds):

85 US 4spd A/T: 6.8, 1/4 mile: 14.9
85 US 5spd: 0-60: 6.3, 1/4 mile: 14.2

As can be seen the US 1985 5.0liter 32V 5spd- which supposedly has 12 less HP and weighs a couple hundred pounds more than the 80 Euro 5spd- is a full second faster! Going strictly by the numbers, this would typically indicate the US model having over 100hp MORE than the 80 Euro does.

CLEARLY, the Euros high HP "DIN" ratings are highly misleading. The proof is in the pudding...and the numbers.

[PorscheFanatic]

I am slightly depressed about these findings. I love all Porsches, but i had specifically sought out a Euro version for the seemingly much stronger motor.
I do already own a '83 928S US 5 speed and it seems so much faster than what those ratings show. It feels like a 5.5 second car. My '80 Euro 928S is about a week away from arriving. As soon as i get it, i will get you a first hand account of the difference in the two cars. If those numbers are accurate, then i will need to pop a few anti depressant pills in a week.
My '88 928 S4 is also coming soon. Surely that car is a middle 5 sec car? I hope i am not let down with it, also. From what i have read, the S4 is a very powerful, quick little German.

[m21sniper]

It has been my experience that all models of the 928 are appreciably faster than their published ratings.

However, that applies to all of them about the same, so while the absolute performance numbers may be 'off' a bit, they will be 'off' across the board for all models. Typically as much as .5 seconds.

Published performance listings for 88S4 Euro*(in seconds):

87-88 S4 4spd A/T: 0-60: 6.3, 1/4 mile: 14.5
87-88 S4 - 5spd: 5.9, 14.2
* US times will be slightly slower due to higher curb weight.

----------------------

As for your car feeling a lot faster- it may be. Is it modified? A good exhaust can save almost 100lbs vs the factory system- AND give you as much as 50(or even more with MSDS headers) extra SAE HP(and also sounds awesome- see below link). Further, there are literally hundreds of pounds of weight one can remove from a 928 in order to boost performance. Also, last time i did my t-belt(over 2 years ago), i advanced my timing several degrees and got a LOT of extra HP over stock- probably as much as 20!
These 928s can be 'souped up' effectively. Trust me, i own a 13.67second in the quarter mile 83 US Automatic!
(2900lb curbweight, 300+RWHP, tehehehe)

And if you really want to go fast just buy one of the myriad supercharger/turbo kits on the market for the 928(as it dont sound like you're hurting for money, lol!), and you'll have a car in the high 4 second 0-60 range that'll run the quarter mile in about 12.5 seconds. Or you can use nitrous(same effect, about 1/6th the price of a S/C or turbo to install)

Link to a short video of my 83US in the twisties, turn up the volume to hear my custom 3" borla exhaust:

http://video.google.com/videoplay?docid=-8806935301358640930&q=928+rain

[m21sniper]

Originally posted by PorscheFanatic
Does anyone know what the horsepower rating is for the 1977 - 1979 928 Euros??

77-79 928, 5spd, Euro: 4.5L-16v M28/01

229 DIN HP, 143mph, 6.8 (0-60), 15.5 (1/4 mile) 3197lbs (curbweight)

https://www.928gt.com/default5.htm

The US model is just as fast in the Q-mile, but is .7 seconds slower 0-60.(the US/Euro cars are geared quite differently)

[rhjames]

visit 928 Specialists' website.

see technical specs/engines

you'll find all the specs you're looking for

[m21sniper]

That's the list i've been linking from.

https://www.928gt.com/default5.htm
Go to tips/links/specifications/engine types.

[PorscheFanatic]

Thanks RHJames for that info. I have been on 928 Specialists site before but didn't browse far enough to find those specs.

m21Spider - my 83 928S US is completely stock. When i saw 7.7 0 - 60 time for the '80 Euro, i was dumbfounded. Surely that car is faster than 7.7 ? I thought a 7.7 is a time of a mid sized passenger car ( weeping ).

I recently saw a selling of an 1979 4.5 Euro. The seller claimed they came with 270 HP. Can this be true?

What modifications do you recommend that don't have any danger of ruining the motor? Exhaust for sure. Any certain ones that are rated highest for additional horsepower?

[m21sniper]

The performance specs for every model of 928 ever are on that site i linked to.

As far as 0-60, no one races 0-60, so who cares. I am far more concerned with quarter mile times(which are akin to a 0-100 run in most cases) than 0-60.

To my way of thinking,

Anything 15.99 or faster can rightly be called 'quick'.
Anything 14.99 or faster can rightly be called 'fast'.
13.99 or less is 'very fast'.
12.99 or less is really 'too fast for the street.' Anything faster is just an exercize in spending and ego, lol.

My 928S is a mid 13 second car, and i embarass most 'sports cars' on the road today in boulevard races.

Badly.

To further illustrate this point, the legendary intercooled Buick Grand National turbos from the 80s(i had one of those too, lol) 'only' ran a 14.5 from the factory(13.9 with chip), and were the fastest production cars made in America. That same years 928 ran about a 14.2....making it the fastest production car in the WORLD.

But today, a Nissan Maxima SE runs a 14.3, and an Altima SE a 14.8!

Fast changes with the times, and is a relative term. In 1980, the 928 Euro was a very fast car, just not anymore...at least, not stock. Now it is merely 'quick'.

As for performance tips, i hope you don't mind me using a pre-prepared answer to a question i have answered dozens of times.

-----------------------------------------

M21s 928 16v performance tips.

I'm trying to do my part in keeping those emails from going to the Snipe.

Here is an email that has a LOT OF GOOD TIPS for the 928 owner. I've put

this one in my file, and I want to post it here in order to help get the

word out. Thanks Snipe, for blazing the trail and for carrying the flag.

regards, P

/////////////////////////

"How to make your 16V 928 a C-5 killer for under $3k bucks.

Since it seems like everyone is forever emailing me asking "how do i make

my 16v 928 fast?", i decided to write up a little prepared statement, lol:

The following are relatively cheap known performance enhancers for the 16v

928s, and some of them are even free. The price quoted in the title

assumes you are a DIY wrencher.

1) Advance ignition timing(lot of power available right there sharksters,

typically +4 degrees seems best)
2) Advance cam timing(this does not add power, but shifts the power band

down to a lower rpm range, for those into that sort of thing)
3) Get a RRFPR/adj fuel pressure regulator
4) Reduce weight. For a stock US 16v 928S every 14lbs is the equivelant to

adding 1hp. As you reduce the weight further, it will take less weight to

'make' each additional unit of HP.

Note: While you're at it ensure that your throttle cable actually opens

the throttle all the way, and ensure that your A/T trans kickdown cable is

tight.

Along this vein,
a- Lightweight contour racing seats
b- drycell or Miata battery, you can also cut the battery box to drycell

size and save about 7lbs
c- lose the spare, jack, took kit and tire air pump- get a AAA card and a

cellphone.
d- remove the emmissions air pump assy.(also see below), etc, etc
e- remove the back seats(cover over with matching carpet), rear visors,

rear windshield wiper arm and motor.
f- remove and scrape all sound deadening(there's about 50-75lbs worth of

the stuff depending on how thorough you get)
g- remove cruise control(servo inside D/S fender
h- remove alarm control box (under dash next to brake pedal)
i- remove factory amp next to passenger seat(under carpeted box)
j- remove the air conditioning assy.
k- etc, etc, etc basically, if it isn't vital, take it out.

5) add 85-86 exhaust manifolds. A common find on ebay that adds about

10hp. Full "MSDS" style headers are an even better option(typically about

30hp), but cost more- and would take up a good chunk of a $2000

budget.(S4/GT manifolds do NOT fit the 16v cars, so dont even ask me about

them, lol)
6) Add 3" inlet smooth walled inlet runners. Extensive testing has been

done on the stock 928 plastic runners, and they showed as much as a 2 inHg

pressure loss at 6000+rpm.
7) lose power robbing belt driven accessories such as, the aforementioned

air pump, the clutch fan(replace with an aftermarket HiPo electric), air

conditioning.
8) replace the factory exhaust with a single 3" or 3.5" pipe with a single

Borla XR-1 muffler.(this also saves a lot of weight)
9) lose the cats and replace with a 928 testpipe(this also saves some

weight)
10) Add a conservative tuneable 50-150hp wet shot of nitrous.($650 or less

new- $400 or less used)

A/T cars only-

11) Install a kickdown bypass switch, as close to the shifter as possible,

and readily accesable.
12) adjust the vacuum modulator to deliver super firm shifts
12a) ensure that your trans starts in first. If it doesn't, pay a trans

guy to have it modified(while he's in there have him adjust the valvebody

to provide WOT shift at 6000rpm for all gears). Hopefully this is a step

most of you won't have to take, but i've rode in at least one 16v 928 that

never starts in first, so it may pertain to you as well. If your 928

doesn't start in first you're basicly throwing away a full second or more

0-60/Q.mile. If your trans needs step 11a you can count on that costing

$1-3k dollars all by itself.

Conclusion:

Do everything listed above, and your 16v US 4.7liter 928 will run a low 13

or high 12 second 1/4 mile for less than $2000 bucks, with a top speed

well in excess of 160+mph. Power should be up from the stock 234hp to

around 400(all figures based on a 100hp jet in the nitrous system). Empty

weight could be as low as 2700lbs if you get nuts.

Oh, and that $2000 dollars i mentioned in the headline....you'll have

change.

Now go find yourself a C-5 Vette and give him a shock.

PS- add another $2500 for a set of Bilstien/Ebachs and 928 Specialists

front/rear HD adj. swaybars, and you'll be able to run against just about

anything.

83 US A/T 928S $5000.00
$2000.00 for the 'sniper performance package'(oh,and a whole lotta hours

of your free labor)
$2500 for the race ready suspension

Total investment: $9500.00

Look on a C-5 drivers face when you blow by his car on the straight aways:

Priceless.

Please....no more emails!"

-----------------------------------------

More 16v performance suggestions & tips from some other guys:
http://www.network54.com/Forum/426130/message/1137526971

and-

http://members3.boardhost.com/928s4vr/msg/1162387451.html



rev: 10-06

[12magnum]

m21 sniper - i saw someone reply to you as"m21 spider" I guess they dont know what m21 sniper means, so i guess they don't know what 12magnum is either

mike
86 928s guards
Autothority chip, euro h4 lamps

[m21sniper]

Our little secret.

[12magnum]

personally I think the m21 is too big for the 928. the 226 fits nicely in the door

[m21sniper]

Hehehehehe....