An inch is a significant amount to move that much weight rearward when it's already behind the rear axle of a small car.

Mark me down as another one who prefers the feel of the 915 over the G50. Also loved my 930 4 speed box once it was rebuilt properly.

I was going to upgrade to a 930 trans in the future, after I added boost... now I think I will just fix the 915 and hope I can get enough NA power to get this car to get out of its own way.

What year is your car and what is wrong with it? :confused:

911SCs were very quick cars through the lower gears in stock form. Like VERY quick. My 1982 911SC w minor upgrades, (SSIs, cams), was an absolute bullet from zero to about 80mph. I once pulled out of a gas station into traffic in the right lane when there was a vehicle traveling ~50mph in the next lane over. I was next to him so quickly that he did a double-take w a shocked look on his face. I still remember it.

It doesn't sound like you even really like the car, you should sell it to someone who knows them and can get it back to what it's supposed to be.

Mine is a 82SC, with 46mm PMO's, SSI's, M&K, backdated heat, 2450lbs... it's maybe as quick as my 05 Mini cooper.

I love what they can can be I guess.... I just cringe at what the market has done to Porsche performance prices. I think with a hot lil 3.6L and a 200lb loss this car would be a riot... If I lived in the mountains i'm sure the car would shine as well.

Maybe I can do a rebuild, get a lil more displacement and some hotter cams... the cost per HP on these just gets out of hand real fast. But at the end of the day I love my Porsche, I just want more of it. lol

Start with fixing the car one system at a time. No way your car is 9.8 seconds to 60mph which is dog slow 05 Mini Cooper stuff. Sounds like you are down a cylinder or two....

He did not say whether the Cooper was an "S" or not but it sounds like his car runs like schit. I'm not sure what the situation wrt shops is in MI. but it needs to go somewhere they know these cars. The wrong people have been working on it.

An S is about 7.7 seconds, still slower than any SC.

I'm sorry, but from your description, there really isn't any "more of it" to be had from where you are right now.

If you are not satisfied with an SC that has these goodies on it, and that has had its weight reduced that much, it's not likely you will be satisfied with any air cooled 911.

If you are expecting even '05 Mini Cooper performance and drivability from your 37 year old Porsche, I would suggest that you have some pretty unrealistic expectations. In which case, I would suggest you follow this advice:

FWIW, It's A Cooper S JCW so 210HP

The SC runs well, aside from the 915 which is a huge bummer as it is right now.

Also I think the 46mm PMO's really want more compression and hot cams to sing.... maybe just adding some compression and cams in time would really wake up the car.

I would love a 3.6L, but 25K for that is just stupid money to me. So maybe cams/compression would make the car fun enough for me to spend the rest of my money on a Cobra kit or a Vette or something for those power urges.

I know what these cars can be, I just don't know if I have the budget to get it there.

915 possibilities:

• Sticky clutch plates from sitting
• cracked clutch fork ( inside bellhousing)
• poor shift linkage parts
• Input shaft bearing rubbing
• linkage adjustment
• clutch adjustment
• internal 915 components
• other?

A stock 82 SC was 6.4 to 60 with about 300 more pounds than you are carrying. About equal to the made-of-plastic-check-engine-light-always-on-malady-prone JCW MINI (in my experience).

I think you should rebuild with some better breathing cams to suit the carbs. Short gear the trans etc.

But before all this, get a ride or drive in a GOOD performing 911 to see if it’s for you.

It is gearing that keeps the car on cam. ^^^^

If you are needing a 915 rebuild anyway... maybe a re gear is what the doctor ordered.

The thing is that carbs need a different advance curve than CIS, and there are a number of factors that could effect your performance.
One thing for sure is that if you drop into second and are waiting for the engine to climb up to where the cam comes on, it won't be very fun or responsive, and you need third gear to come on cam as well. Is Steve Wiener still in business? He could sort you out, as could John or Dan Jacobs, and probably a half dozen others. The right gearing is worth 50 HP in terms of responsiveness.

I do know that the PO did have the timing curve adjusted for the carbs, but still I think they would benefit from hotter cams and some compression.

It may just be that with my concern for my well used 915 I have never really driven the car properly hard... nor do we have roads that a car like this can really shine on.

CIS was the limiting factor

As soon as you get rid of that bottleneck your car becomes ready for proper cams

It's currently running 46mm PMO's, which is probably a bit much for a stock engine, but the throttle is snappy ;)

Sounds to me like a lot of guessing this and guessing that. You do know that there are spreadsheets and programs to establish how the cams should be ground given the other vital parameters?

Well the shop feedback is that it is internal, suggesting that it might be the 1,2,3 syncros, 1/2 slider and maybe 2nd gear, recommend complete rebuild..... UUUUG not what I was hoping for.

But **** it, i'm going to turbo the car in a couple years, and maybe I can sell the 915 toward a 930 SBH later.

Go deep, can't take it with you right!!!! Gawd I hate cars! LOL

That is not a super-difficult job, I would look over the parts before I authorized the repair. I don't think I've ever seen a second gear that was gone.

Synchro's for sure...get it fixed properly.

So, it sounds like they give you an estimate to have without actually looking inside the gearbox. That’s not going to be worth much.

I have no idea what shop you are using but do they have enough experience rebuilding 915 gearboxes? Have you considered shipping the gearbox off to an individual or shop whose rebuild would add value to your gearbox when you sold it down the road?