Observations and Questions about my "new" SC.

[Doug&Julie]

Originally posted by Deschodt
Did you also notice the difference in gearing and torque ? The S cis geared much longer in 1st and 2nd but it gets away with it thanks to it's 0.6L of extra torque ! ;-)

Yeah, I love having the bigger motor. Screamers are fun, but get annoying on the drive home from your fun.

Thanks for your comments!

[Doug&Julie]

Originally posted by C U L8R
Doug, Make sure your fan belt is tensioned properly and not glazed over. It could be slipping which may cause your Alt light to stay on, but also won't cool your engine properly.

Will do! I've nonticed that the whole back of the car seems to get very warm. The oil temps go a little above "half way", but still far from the "red zone" on the gauge, but there just seems to be a lot of heat soak in the back. Of course, it could be that it's been teasing 90 degrees here lately....and for the next five days, we're going to smash right through 90!

[Doug&Julie]

Originally posted by UTKarmann_Ghia
Mine also has a slight shudder if I let out the clutch at low rpms. Not sure why this is, but it's not a big deal. Adjust your clutch cable and it may resolve the shudder (bowden tube may not be snug enuf).

I'm really beginning to think this is operator error on my part...I've been driving it like a lazy person. I drove the car a bit yesterday and adjusted my take-off action and it was much better. Still, I'll have Ken look into it.

[Doug&Julie]

Originally posted by bigchillcar
charging system light: i personally change batteries every two years whether needed or not..just cheap insurance. your battery may be old and putting quite a draw on your alternator. i'd pull the batt and take it to napa..let them see how it does under load. if it ain't great..buy a new one. one more piece of mind item in place. good luck!
ryan

Thanks Ryan! I'll be sure to look into that. Might be cheap insurance to just buy a new one and see where that goes. But I'm hoping to get my car into Ken in the next week anyway...just waiting on my (delayed) parts from Pelican! ( )

[bkreigsr]

The difference in noise level could be attributable to he thermal reactors? If you are going from ssi's in your earlier car to the factory system on the 77, there is a huge dB difference.
There was for me.
By the way, once you get rid of them with a decent free flow sys, oil temps will drop 30+ degrees, and you will no longer have the possibility of boiling the fuel after spirited runs.
cis is a whole 'nother beast.
Have fun!

[Doug&Julie]

Backdating exhaust is on the list...but its down on priority. Should I move it up? The exhaust is stock from the factory. Could this be contributing to the amount of heat I feel around the back of the car after a drive?

[bkreigsr]

yes, yes, and yes

move it way up on the list

thermal reactors are bad...... very, very bad
they are nothing but a 12lb(ea) cast iron heat-sink designed to burn off pollutants at super high temps towards Porsche's attempt to stay cat-free.

take a close look at the underside of your car to see the dictionary opposite of 'free flowing exhaust system'

[Doug&Julie]

Good to know, thanks!

OK, I really need to sell Foxy Brown so I can afford my cheap SC!!

[Pat S]

Originally posted by UTKarmann_Ghia
my friend's 74 was much lounder than my SC, so that's a GOOD thing!

Yeah well my friends SC was way quieter than my 74! Good to see you here Matt!

On the Decel valve, in the early CIS models this was an easy adjustment. The nut on top turns to make it drop quick or slow. Not sure if it is the same on the SCs?

Pat

[bkreigsr]

Hey Doug, there are alternatives to selling old fauthful. I have most of the parts you need to convert to a euro exhaust sustem, dirt cheap. (2 heat exchangers, and the crossover pipe) that would not work on my short bellhousing 4 speed trans.
Bill K

[Doug&Julie]

PM'd you.



PS. I still need to sell old faithful...

[bigchillcar]

that day that 'old faithful' sells...i sense a premonition of the blowing of a 'mighty wind'..
ryan

[rburn]

My 84 oil pressure was pegging out also. I pulled the wire
off pressure sensor and the gauge went zero.. connect peg... I dont think it's good to have it pegged while driving. i'd probable disconnect if it's not reading at all.. then maybe not Mine was the pressure sensor unit. Here's the threads on replacing this if you have AC on the car (use a crowsfeet...)

Oil Pressure Sender

I had a small issue with getting into 1st gear unless stopped but got larger problems with a clunk... You should be able to get a R&R on the trans... syncho's etc for under $500 bucks LABOR... parts well depends where you buy these.

I paid for the parts below $1,230 shipped... last year.

So you looking at around $2k to address common wear items. If your looking at gears or heaven forbid bearing you better grab a chair when looking them up. Your bearing should last a long long time if you Do not run metal through them (hint your 1st and 3rd grinds.) I would attend to the trans pronto as it seems to be at a point that would really benefit you to get it done at a reasonable cost.

I did a small video of dropping a engine out of my 84 if
your interested. taking into account safety issues of a drop. ie. unhook the battery #1...

http://www.beams.com/porsche/


Good luck.


ALL OEM
item unit, cost unit, # units, cost

Gasket set 915-300-911-01, 42, 1, 42

Trans fluid swepco 201, 44.5, 1, 44.5

1st Syncro 915-302-301-06, 63, 1, 63

2nd Syncro 915-302-301-04, 62, 1, 62

3,4,5 Syncro 911-302-301-06, 57, 3, 171

Dog Teeth 1st 915-302-241-14, 106, 1, 106

Dog Teeth 2nd 915-302-242-00 105, 1, 105

Dog Teeth 3,4,5 915-302-242-03, 105, 3, 315

Guide Sleeve (spyder) 1st-2nd 915-302-401-02, 118, 1, 118

Slider 1st/2nd 930-302-411-02, 143, 1, 143

2nd brake band assmbly
Double Band Band 928-302-318-02, 29.71, 1, 29.71
Stop Block 915-302-315-01, 14.17, 1, 14.17
anchor block 2nd gear 928-302-322-00, 16.96, 1, 16.96

Parts Total 1230.34

[keagy]

My grinding in 1st issues went away when I replaced the clutch. You have a 30 year old car and I bet the clutch is really old. People blame 915 transmission for being difficult but I think its old clutchs. The clutch takes almost no effort to push when new. If yours is hard to press it is old.

[JR_NYC]

Get swepco 201, replace the shifter bushings and install a Seine shift kit ($150) and your shifting experience will be transformed.

Thermal reactors on an SC? I think those came w/the 2.7 not the 3.0.

The problem w/the SC oil temperatures is this stupid trombone "oil cooler" which isn't really much of a cooler at all. A Carrera cooler w/fan is the way to go as far as fender mounted units go. W/o the fan the car will still overheat in traffic.

[Deschodt]

Agreed on all the above, except (cynical me), I've got a carrera cooler + fan, and while it's much better, it's still not enough for track days.... But perfect for traffic jams !

[BernieP]

I don't want to preach but if the tires are down to the wear bars be VERY careful when driving in the rain. When I bought my SC a few years ago I went on a short trip and it rained all the way back, I scared the heck out of myself even at moderate speeds. Ordered new shoes the next day. Enjoy

Bernie

[Doug&Julie]

Originally posted by BernieP
I don't want to preach but if the tires are down to the wear bars be VERY careful when driving in the rain. When I bought my SC a few years ago I went on a short trip and it rained all the way back, I scared the heck out of myself even at moderate speeds. Ordered new shoes the next day.

Thanks Bernie. Fear not, I'm trying not to drive it in the rain. Although, Friday we had one of those humid days that is sunny until about 4:00 when the humidity creates pop-up storms. I got cought in one. I was very careful. The fronts are ok, the rears are the ones for me to worry about. So as long as I kept it "out of the power", I was pretty ok. Still, driving was very careful.

And the good news is my Targa doesn't seem to leak!

W/o records, I have no idea if the clutch is original or if it's been replaced lately. The action is easy and the pedal feels light(ish) and comfortable. Other than that slight juddering issue (which I'm pretty convinced is operator error) I have no reason to believe it's not a good clutch. But you never know...

I plan to move the cooling improvements up on the priority list. I don't know if the SC exhaust has thermal reactors like the 2.7 cars, but it does have a significant catalyst (3 way I believe) that looks to be creating a lot of heat. We don't have e-check anymore, so those will have to go. Then I'll look into the front cooler. Since this car won't see track action, I'm sure that's as far as I'll go.

rburn - thanks for the detailed info!

Still hoping to get the car to my wrench this coming week. I'm trying to drive it very little until then (with the bad tires and need of valve adjust). I'll have more info after the appt!