fiftyfive

My '86 930's OEM turbo has finally given up the ghost: Oil-coated intake and a thick stream of smoke behind the car don't lie. It's been going downhill and finally fell off the cliff tonight.

As I understand it, upgrading to a K27 7200 on an otherwise stock 930 a) is a direct bolt-on, no tweaking required, and b) improves low end spool-up at the expense of top end boost. Is this right?

I've wanted quicker spool-up for street driving and rarely go above 5500rpm. My shop has a strong preference for OEM bolt-ons with minimal "file to fit" issues.

Does the 964's C2T OEM turbo fit the bill? The Borg-Warner/3K website P/N is 5327 988 7200. Porsche OEM P/N is 930 123 013 04.

Ferrari1

I think that you need an adaptor to fit the flange on the turbo to the pipe leading to the intercooler.

The 964 used a silicone boost tube and bigger intercooler.

pete77930

I think you'd be happier in the long run with a CBB unit. they do require a little more work to fit but the gains beat the 30yr old kkk technology by a mile.

fiftyfive

Correction - PET shows '86 OEM turbo P/N as 930 123 003 01. 964T is 930 123 003 002. I'm assuming they're 3LDZ and K27 7200, respectively?

Regarding an adaptor, is one available or does it have to be fabricated?

Even giving up newer/better technology, I want to keep the car as close to OEM as possible. If spool-up simply comes in a few hundred rpm lower I'll be happy.

Bruce Eyring

A K27-7200 is a direct replacement...if a real good Porsche 930 mechanic does it.....you don't need machine work...blah blah....have had one one my car for 170,000 miles...present one for over 100,000 miles...still fine!! but...I use Brad Penn 20-50....so the present rebuild has well over 100,000 on it. (total of 239,000 mi. on car) Saw new K27-7200 on RarlyL8 website for $1195.00 rebuilts are a disaster. Questions..call Jerry Weiden at German Car Repair in Atlanta (770.649.8700) He has put on dozens of K27's ..if not hundreds...over his 28 years as a excellent Porsche mechanic.

Ferrari1

if its not the same as the kdlz....which I am pretty sure its not....you need an adaptor....or the mechanic needs a magic wand.

Buy one...bolt it on ...then see how it fits to the down pipe. Should be interesting.

911rudy

I put one about two years ago and I bought the adaptor from IA. It took a little persuasion to get it all aligned and the turbo bracket at the rear of the engine had to be cut and welded to get it to fit properly. Not difficult but not a bolt on either. You will also need an oil line and tank for the rear of the engine and one from the oil pump to the tank on the front of the engine. I had a lift to do all of this with and it was a lot easier than lying on your back with jack stands. If you are not pretty handy I would go to someone who has done this many times before.

RarlyL8

I've done this swap a bunch of times.
The K27-7200 bolts onto the stock J-pipe T3 flange.
Up-pipe fitment requires the adapter or pipe mod with a hose. I press on the adapters.
Stock bracket fitment requires holes to be slotted or cut and weld.
Stock turbo oil tank will fit with no modification with stock J-pipe. No new lines needed as tank stays in stock spot.
I can e-mail you a picture tutorial and am available to help during installations should questions arrise.

911rudy

Rarly I don't know how you did it on the rear but my hard oil line would no longer fit with headers installed and I had to go with the smaller turbo tank. Maybe it was the headers that caused the no-fit.

RarlyL8

Yes, it is common for headers to block the stock turbo oil tank and hit the oil lines. I only know of one manufacturer who makes headers that retain these stock items. I was refering to turbo swaps using the stock J-pipe.

Kevin

55;

I manufacture and have plenty of the billet adapters on hand.

If you need a new K27 7200 send me a email or call me. I have a few on hand.

Cheers

fiftyfive

Thanks for all of the good input.

Is the bracket that needs modification P/N 930 107 113 01? It's shown in PET for '74-'89 911: MG1 SG7 Illus 107-40 Item 23.

Marcelorienzi

Could you send me please? a picture tutorial?