Happy days, 911S is alive!
Moderators: hot66, impmad2000, Barry, Viv_Surby, Derek, Mike Usiskin
Happy days, 911S is alive!
Hi All,
Just wanted to share my excitement at taking my 2.2 911S to the rolling road today and it being transformed by a combination of using the Porsche CMA guide and the modern tech of rolling road and lamda sensors etc. Got it driving really nicely, no nasty popping and banging etc and 178 hp at 7000 rpm... so very happy.
A few fixes to get on with to finish now that maybe some people might be able to help on!:
1) Horn goes off when turning corner - there was nothing obvious when I looking at the copper disc that the horn works off?
2) Rev counter is reading approx double and jumping around - I probably need to speak to Classic retro fit as it is being driven by their CDI box but if anyone has any experience on that it would be gratefully received. From eth web the jumping around may be alternator based but don't know how you check that?
3) Gearshift is taking me some time to get to grips with!. It is a rebuilt gearbox and linkages are all new but its all floppy and imprecise. I know there is a world of different shifters - does any one have a recommendation or one they want to sell?
Cheers
Roger
Just wanted to share my excitement at taking my 2.2 911S to the rolling road today and it being transformed by a combination of using the Porsche CMA guide and the modern tech of rolling road and lamda sensors etc. Got it driving really nicely, no nasty popping and banging etc and 178 hp at 7000 rpm... so very happy.
A few fixes to get on with to finish now that maybe some people might be able to help on!:
1) Horn goes off when turning corner - there was nothing obvious when I looking at the copper disc that the horn works off?
2) Rev counter is reading approx double and jumping around - I probably need to speak to Classic retro fit as it is being driven by their CDI box but if anyone has any experience on that it would be gratefully received. From eth web the jumping around may be alternator based but don't know how you check that?
3) Gearshift is taking me some time to get to grips with!. It is a rebuilt gearbox and linkages are all new but its all floppy and imprecise. I know there is a world of different shifters - does any one have a recommendation or one they want to sell?
Cheers
Roger
Re: Happy days, 911S is alive!
Great news, is this something that any rolling road place can do, or it needs someone with early 911 experience?
Dean
1973T Targa MFI 334 met blu- under restoration https://www.ddk-online.com/phpBB2/viewt ... 28&t=67060
1980 924 Turbo, blu/grn tartan - restored
1973T Targa MFI 334 met blu- under restoration https://www.ddk-online.com/phpBB2/viewt ... 28&t=67060
1980 924 Turbo, blu/grn tartan - restored
Re: Happy days, 911S is alive!
The guys I took it to are a couple of miles down the road to me. They normally tune their VW/Porsche moderns with laptop on the rolling road but they are very savy and understand how engines work. I have been through the CMA and was happy to adjust the pump main and idle screws, and see what the results were and then keep tweaking it. The key observation is that with obviously only 2 screws to adjust across the rev range you are always a compromise compared with what they are used to dealing with where they can tweak fuelling across a map.
Bearing in mind this was a ground up rebuild, I had spent a fair amount of time in setting it up myself but without the lambda sensors and being able to put it under load I couldn't get it anything like right. With the lambda sensor it was pretty easy to see what the adjustment screws did and get it running right.
Bearing in mind this was a ground up rebuild, I had spent a fair amount of time in setting it up myself but without the lambda sensors and being able to put it under load I couldn't get it anything like right. With the lambda sensor it was pretty easy to see what the adjustment screws did and get it running right.
Re: Happy days, 911S is alive!
HI Roger, for a simple but effective improvement to your gearbox you may want to look at this simple spring
https://forums.pelicanparts.com/porsche ... e-can.html
I put it on my rebuilt box & it was a huge improvement
Regards
https://forums.pelicanparts.com/porsche ... e-can.html
I put it on my rebuilt box & it was a huge improvement
Regards
76 C3
73 T long gone
73 T long gone
-
- Put a fork in me, I'm done!
- Posts: 1672
- Joined: Fri Mar 01, 2013 11:45 am
- Location: Kernow - good old Cornwall
Re: Happy days, 911S is alive!
The floppiness could be the nylon bush at the base of the gear stick, did you replace that along with the others. Mine looked fine from the top, but when I took the gearstick out, it just crumbled to dust!
-
- Nurse, I think I need some assistance
- Posts: 19025
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: Happy days, 911S is alive!
915 box, but in my many years of these boxes, factory shifter and all new bushes plus adjustment very carefully made will be the best.
Oh, and pictures are required!!
Oh, and pictures are required!!
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Re: Happy days, 911S is alive!
WEVO gateshift - replaces the imprecise fork arrangement within the gearbox.
Accessible in-situ, but mine was fitted during an overhaul which included bearing retainer upgrade etc.
Accessible in-situ, but mine was fitted during an overhaul which included bearing retainer upgrade etc.
Re: Happy days, 911S is alive!
Thanks all, will look at the gearbox suggestions. Hopefully here are some pictures from today:
https://www.flickr.com/photos/151746384 ... 58FxJ64k04
https://www.flickr.com/photos/151746384 ... t15GaAFzBo
https://www.flickr.com/photos/151746384 ... B1934x6907
https://www.flickr.com/photos/151746384 ... 58FxJ64k04
https://www.flickr.com/photos/151746384 ... t15GaAFzBo
https://www.flickr.com/photos/151746384 ... B1934x6907
-
- Put a fork in me, I'm done!
- Posts: 1672
- Joined: Fri Mar 01, 2013 11:45 am
- Location: Kernow - good old Cornwall
Re: Happy days, 911S is alive!
Who was it with the rolling road in Cornwall please?
-
- Me and DDK sitting in a tree! KISSING
- Posts: 2696
- Joined: Thu May 21, 2009 2:54 pm
- Location: Kent
Re: Happy days, 911S is alive!
About time Roger. Enjoy.
70T barn find...... to ST.
1998 C2 996 Kettle
1998 C2 996 Kettle
- Jonny Hart
- Put a fork in me, I'm done!
- Posts: 1551
- Joined: Mon Feb 01, 2010 2:28 pm
Re: Happy days, 911S is alive!
There's a tacho test mode on our CDI+ box. Remove the button head screw on the front of the CDI+ box. Turn on the ignition (do not start the engine). insert a small screwdriver and press the internal switch once. The taco should slow sweep from 0 to 7000 RPM and back smoothly. If it doesn't, then it will be the tacho.
There are 4 test modes described in the manual on page 17:
Manual is here: https://www.classicretrofit.com/pages/m ... d-software
There are 4 test modes described in the manual on page 17:
Manual is here: https://www.classicretrofit.com/pages/m ... d-software
Re: Happy days, 911S is alive!
Thanks Dave!
Yes Rolling road is in St Agnes - RK Engineering
Thanks Jonny, did send you an email but will do the diagnostics, thanks
Yes Rolling road is in St Agnes - RK Engineering
Thanks Jonny, did send you an email but will do the diagnostics, thanks
Re: Happy days, 911S is alive!
I personally would't use a wevo shifter. Short shifters move the pivot point of the gearstick and put more strain on the components. Changing the bushes with fresh genuine Porsche bushes will improve precision, as will getting the gearbox linkage adjusted by someone who knows a lot about 915 gearboxes.
Regarding the horn. Sounds like your horn ring is not properly seated or you are missing the conical shaped spring that sits under the horn button.
Regards
Paul
Regarding the horn. Sounds like your horn ring is not properly seated or you are missing the conical shaped spring that sits under the horn button.
Regards
Paul
1970 2.2 911 T / Ex RS Clone, now more original looking, with 1979 3.2 SS engine
1988 3.2 Carrera Commemorative edition (sold)
1988 3.2 Carrera Commemorative edition (sold)
-
- Nurse, I think I need some assistance
- Posts: 16928
- Joined: Wed Nov 12, 2003 10:48 pm
- Location: Worcs/W Mids border
Re: Happy days, 911S is alive!
.
/\/\/\
Agree with Paul's comments above (although it's a 901/911 'dog leg' gearbox not a 915).
IMO with all linkage bushes in good condition & adjusted correctly, there's no need for any alteration to the Factory set-up ...
.
/\/\/\
Agree with Paul's comments above (although it's a 901/911 'dog leg' gearbox not a 915).
IMO with all linkage bushes in good condition & adjusted correctly, there's no need for any alteration to the Factory set-up ...
.
Andy
“Adding power makes you faster on the straights;
- subtracting weight makes you faster everywhere”
“Adding power makes you faster on the straights;
- subtracting weight makes you faster everywhere”
-
- DDK 1st, 2nd and 3rd for me!
- Posts: 2115
- Joined: Sat Oct 26, 2013 12:42 am
- Location: Oxfordshire
Re: Happy days, 911S is alive!
Totally agree with Andy. In any event the 'dog leg' box is part of the character of a 2.2S.Lightweight_911 wrote: ↑Mon Jul 24, 2023 4:26 pm .
/\/\/\
Agree with Paul's comments above (although it's a 901/911 'dog leg' gearbox not a 915).
IMO with all linkage bushes in good condition & adjusted correctly, there's no need for any alteration to the Factory set-up ...
.
Rust Never Sleeps