Anyone have a picture of a smog pump installed on a 1.8? Options

[DaveB]

Looks like a 604 same as mine. Which is also why there is no indication of an EGR. That engine never came with any of those things.
What’s the engine stamp number?

This is the data on the entire car I've collected to date (plus notes)

VIN 4752908998
Engine 1.8L
Engine Serial Number: EC006108 1795cc
Transmission 914.301.101.00 914/12
Transmission Serial Number HA15113 15th day, month 11, year 1973 (11/15/73)
Chassis ID 084-9014 Week 8, Day 4 Karmen Factory, number 14 built that day
Karmann Plate 084-9014 L97B Ancona Metallic Blue
Timing Emission Sticker 1975 1.8
Valve Adjustment Sticker 1.8
License Plate Oregon July 2002 last registration
Manufactured Feb-75

Data from the PPS (kinda):
Engine Type: 22
Exterior Paint Color/Code: Ancona Metallic Blue / X5
Optional Equipment: Equipment for California, Tinted Side Glass
Interior - I am working with PCA to get this either corrected or clarified. Its Code 80, Black leatherette seat trim with medium blue tartan inserts.

EGR Counter for engine warning reset is installed.

Engine - Dual Weber 34's, no L-Jet, no smog equipment. Lower AC pulley bracket found installed on the block near the oil filter. The correct engine s/n for the car should have been around EC0043405.

Exhaust - 1973 heat exchange and sausage muffler. Rear transmission mounting bracket gone.

Regards,

Dave

[DaveB]

@wonkipop

I'll take picture of any stickers I can find.

What I'm reading is that in order for Porsche to meet the Clear Air Act, they lowered the compression because the unleaded fuel in 1975 was a single regular grade (somewhere in the mid-80's R+M). Without the high octane and needing to meet the emission levels, the lower compression was combined with retarding the timing and the catalytic converter. I assume this put the timing it at the point just before knocking started to happen for NO improvement. So it wasn't the smog equipment but the unleaded fuel that fucked-up all the performance in the USA. That explains the note in the Owners Manual for 1975 that says the 914's in the USA should not be sold in Europe due to the limited availability of unleaded fuel. This has been a good education - thanks.

DaveB

[wonkipop]

relax dave.

all cars in the USA had to move towards using unleaded fuel.
you have to have unleaded fuel for cats.
unleaded comes in first in 1973 in cal.
then 74 in rest of USA.
its just to get ready for cats.
on its own it does nothing for emissions but cats don't tolerate lead.

its all staged.

removing lead is separate from cutting NOx.
but it is related to other emissions.
remove lead, install cat as a result, deal with CO and unburnt hydrocarbons with cat.

they did unleaded by lowering compression. thats it, lead dealt with.

move on. NOx, CO and hydrocarbons a separate matter.
to deal with CO and hydrocarbons you needed a cat (early 2 way cat).
its a grand plan, year by year, step by step.
NOx is dealt with purely by retarded timing.

every farkin car in america had to go to unleaded. not just 914s.
california first and then the rest of your great sprawling nation.
and..........after that the rest of the world.
thats why you f$ckers landed on the moon ......not the russians.
thats why i like you lot.

...the point is porsche used EFI and a few other analogue adjustments to make it through emissions from 74 to 75.

my question to you is what are trying to do/
a technological restoration/reconstruction or what?

just work out what you are wanting to achieve and..........
let us know.

but if you thought it was a simple as a smog pump think again.
not being nasty.
it would be a real job to bring back a 75 1.8 cal spec.
and you got to ask yourself why.
and if you say, just because.
well thats a good reason.

(IMG:style_emoticons/default/beerchug.gif)



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or here is the idiots guide to cleaning up the air in the 1970s galaxy.
in shorthand by a f$%kwit from somewhere north of the south pole.

step1.
we have to put catalysts on cars!
first promoted i understand by a genius in GM around 1969.
someone can fill in the details if i am wrong.

step 2.
some jostling about cats from ford, gm and chrysler.
but all agree, yep way to to.

step 3.
we can't have lead in petrol if we have cats.

step 4.
EPA says, ok lets delete lead.
ummm, how do we do that given there is x thousands of oil refineries and x millions of gas stations with fuel pumps and gas tanks underground etc.

step 5.
we will work it out.

step 6.
smart alecs in california put up their hands and say we are first, we have a smog problem, give us special powers. us congress says ok, you have special powers.
go first.

step 7.
this summary is bs because i left out other stuff about vapor emission controls etc.

but.
steo 8 = point 1. unleaded fuel was going to have to happen to close the end game with cats.

step 9.
california 1.8 is the end result of germans saying we have a piddle arse tiny little air cooled no nothing flat 4 we cannot afford to lose horsepower from so here it is.
and they did it.
lower compression runs on unleaded.
got all your clean gear on it.
and its still cranking at 76 hp. pretty close to 80 hp leaded high compression 1.7 dating from 1970.

its all good.