When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
It all went downhill after '80. Everything is so simple and there is so much room!
Originally Posted by Landseer
Separately, when will we see the first ljetronic chipset?
"We're no computers, Sebastian. We're physical"
L-Jet is analog so no chips. I will probably revive a WOT wire harness I made for my OG '81 which allows the Temp II output to be adjusted at full throttle. Maybe, I can figure out a timed O2 sensor bypass after the WOT switch is tripped analogous to the 'Sport Mode' I programmed into my S3 chips.
Related to that, I'd like to make a timed trans kickdown circuit which I put on my '85 GMC (diesel) which holds the kickdown for ~6 seconds. It also disconnects the A/C compressor for that time, too.
Originally Posted by Rob Edwards
That seems like an unusual failure point in 928s, no?
Weird, but that whole area was stuffed with mice stuff. Continuous mice pee contact for 20 years is obviously not good for aluminum. The radiator cap was rusted through. Right after I installed a new cap it blew the heater core line and coolant started pouring out of the heater box onto the cat. Steaming old coolant mixed with liquefied mouse effluence smells great!
Runs close to the coolant temp 3/4 mark so I think the fan clutch needs replacing/refilling.
3-speed auto needed about one quart ATF top-off and the short rubber hose to the vacuum modulator was cracked/replaced.
Appears to have the original square tooth timing belt running on steel cam gears. Green lettering is still visible. Porsche stamped ISORAN Made in Italy.
Thanks Bob. I hadn't paid attention to the new alternative (ÜRO) fan clutch. Back in my day there was only the factory version so I saved (OK, hoarded) a couple that may be good.
Thanks, brah. I'm surprised by how nerdy I've become with this one. Since it has never been messed with (by someone like me) I don't feel I have as much license to change things, if that makes sense.
All of my previous 928s have had some problem or other. My S4 for example was worked over pretty hard and spent a lot of time in a body shop so many of the bolts are/were in the wrong spot or were not original. I replaced most of the badly repaired panels but it's never going to be totally 'fixed'. I got kinda burned out on it. Was even thinking of getting a Cayman S.
I've decided to work on this one in waves. Get it driving in totally stock form. Then slowly raise the power a bit while keeping it original looking. The 4.5 won't ever make big HP but it can make a big gains in torque. I'll be keeping the mechanical fan but deleting the vacuum limiter with factory caps (factory deleted for L-jet autos in '83). I've held onto some '79 cams I could throw in. Probably will make a Y-pipe eventually. Maybe do a MAF conversion (with a Split-Second HV calibrator). Etc.
10-14-2019, 01:57 AM
sunroof.
Everything is so simple and there is so much room!
