3.2 to 3.4 convcerion

[kepperly]

Wayne,
I need to know the the parts #'s required to transform my 87 3.2 to a 3.4 or larger discplacement mtr.I would also like to purchase all the required tools also.
If you could send me a list I will arrange the funds transfer.Thank you in advance. I will be sending my my heads to Ollies as I have good references of their work and would like some impute as to what cam shafts to utilize with this combination

Sincerly
Keith Epperly
87 slant nose turbo look carrera cabriolet

[88-diamondblue]

Keith,

I assume that you will be rebuilding the engine? You need 3.4 pistons and cylinders or go to the 3.5 like Ralph did on his car. Are you going to do a twin plug and higher compression? Also a more aggressive cam would be good. I went to 9.5:1 3.4 on my 88 with Camgrinders DC22 cam grind and a custom chip from SteveW. ARP rod bolts are a must. I will be getting it on the dyno soon to tune the chip. So far it feels strong.

3.4 cylinders and JE pistons

[Carrera3.5L]

Keith,

To save Wayne some time (and some redundancy perhaps), here is a link for a template of parts with part numbers that are often replaced when doing a 3.2L rebuild, whether stock or when also increasing displacement.

http://www.europeancarweb.com/projectcars/proj911parts.pdf

If not twin-plugging (although if your budget allows I would suggest it), you can completely disregard that section, as well as much of the machine work that was performed. Some of the performance/tune-up/sublet items are up to your personal tastes and goals as well as your budget for the project...

You can simply plug in the Pelican prices to give you an idea as to what the parts might cost. Keep in mind that you may not need to replace ALL of these parts, your individual engine's condition will determine what actually will need replacing, you even may require additional parts than what is on the list...

Going to 98mm pistons/cylinders does not require any additional machine work other than a small chamfer to the cylinder heads. If using Mahle Motorsport products, the kit you would need is part number PS98-002. There are other sources for pistons & cylinders as well if one can't swallow the Mahle prices.

If you are retaining Motronic, the 964, 20/21 or 993SS profiles are all suitable, I believe camgrinder on this board has grinds for all 3 mentioned above that are similar if not the same.

Tasteful intake & exhaust mods done at the same time as the displacement increase with Steve Wong's chip tuning to tie it all together will yield a nice, reliable and fun-to-drive street motor that will breathe new life into your old car.

Hope you find the info useful...

Ralph

[kepperly]

CARRERA 3.5,
HOW LONG HAS YOUR MTR. BEEN TOGETHER? THIS WILL BE MY LAST CAR PROJECT BEFORE I AND MY FAVORITE PORSCHE WRENCH
BOTH RETIRE AND I WANT IT TO LAST. I WANT TO GET ABOUT 60K OUT OF THIS TOURING THE COUNTRY AFTER RETIREMENT AND DON'T WANT THE PESKY Z0-6 KIDS LAUGHING AT ME ANYMORE.
IS THEIR THAT MUCH DIFFERANCE BETWEEN 3.4 AND 3.5 THAT I SHOULD GO TO THE ADDITIONAL WORK ON THE CASES.

THANKS MANY

KEITH EPPERLY
87 SLANT NOSE TURBO LOOK CARRERA CABRIOLET
89K MILES AND NOT VERY TIRED YET

[kepperly]

MORE PIC,S OF THE OLD MANS CAR

[kepperly]

I WISH I KNEW HOW TO ADD MORE THAN ONE AT A TIME

KEITH

[JeremyD]

Emission testing in Kansas Keith?

[Carrera3.5L]

Originally posted by kepperly
CARRERA 3.5,
HOW LONG HAS YOUR MTR. BEEN TOGETHER? THIS WILL BE MY LAST CAR PROJECT BEFORE I AND MY FAVORITE PORSCHE WRENCH
BOTH RETIRE AND I WANT IT TO LAST. I WANT TO GET ABOUT 60K OUT OF THIS TOURING THE COUNTRY AFTER RETIREMENT AND DON'T WANT THE PESKY Z0-6 KIDS LAUGHING AT ME ANYMORE.
IS THEIR THAT MUCH DIFFERANCE BETWEEN 3.4 AND 3.5 THAT I SHOULD GO TO THE ADDITIONAL WORK ON THE CASES.

Keith,

My personal motor has been together since late 2004 (coming up on 2 years now) and has 16K on it at present and still running (knock on wood )

These 3.4L/3.5L street motors are not race motors with ultra-tight clearances using exotic materials in an attempt to wring out every last horsepower, they are simply 3.2L rebuilds with a few little ancillary goodies thrown in to make more power without sacrificing reliability. Think of them as what Porsche SHOULD have installed in Carrera's rather than the lethargic 3.2L trying to move 2,700+ lbs. These bigger bore motors, using quality parts and skillfully assembled can/will last as long as a normal 3.2L rebuild. I fully expect mine to last 100K plus and I think that most others who have done the same thing would agree...

I don't find the Z06 guys pesky at all, the only thing I see is their taillights as they rapidly disappear. Not to burst your bubble, but you still won't have a chance with a late model 500 hp Vette, they are still going to blow you out of the water, although the gap may shorten a bit. They laugh at me too..

My personal opinion (which isn't shared by everyone) is the 100mm 3.5L is a no-brainer for a 3.2L normally aspirated motor, but I'm obviously biased. All things being equal, a 3.5L will make more power than a 3.4L, especially in the low-mid range where many usually drive. While you may get away with single-plug on a 3.4L, you really can't/shouldn't with a 3.5L running on pump gasolines and thus twin-plugging the Motronic system will add another $1,500-$2,000 to the bill... The only other real expense is machining the case spigots for the larger bore, around $200 which is pittance when taking into account the costs of a complete engine rebuild. You may also have to consider supplemental oil cooling depending on type of usage and climate. I think your budget will dictate what the best course of direction is...

From the limited photographs of your car, it looks very nice and I think no matter which way you choose, 3.4L, 3.5L or even 3.6L transplant, all will be a nice upgrade over a tired 3.2L and you can ride off into the sunset with a smile on your face...




Ralph

[kepperly]

NO EMISSION TESTING IN KANSAS. FLAT STRAIGHT ROADS, MANY OPPORTUNITIES FOR HIGH SPEED CRUISES. THE 3.5 SOUNDS LIKE THE WAY TO GO BUT ANOTHER 2K JUST FOR TWIN PLUG ISN'T COST EFFECTIVE IF I RESALE. YES THE CAR IS NICE I WISH I KNEW MORE ON HOW TO DOWNLOAD PHOTOS. I AM BYE THE WAY THE LOCAL PCA CHAPTER MEMBERSHIP CHAIR IN CASE SOMEONE IS COMING THROUGH OUR NECK OF THE WOODS AND NEEDS ASSISTANCE. KEITH EPPERLY CELL 1-316-734-3543. THIS PARTICULAR CAR WAS SENT BACK TO GERMANY FOR THE SLANT TURBO BODY CONVERSION.

KEITH EPPERLY
87 TURBO LOOK CARRERA SLANT NOSE CARRERA CABRIOLET

PS. WAYNE WHY DON,T WE START A NATION WIDE RESOURCE CENTER FOR TRAVELERS TO REFFER TO WHEN THEY HAVE PROBLEMS AWAY FROM HOME.

[Carrera3.5L]

Originally posted by kepperly
THE 3.5 SOUNDS LIKE THE WAY TO GO BUT ANOTHER 2K JUST FOR TWIN PLUG ISN'T COST EFFECTIVE IF I RESALE.

Keith,

I agree with you 100%, but you most likely won't recoup your cost having someone rebuild your stock 3.2L either...The majority of these cars are only worth $15,000-$25,000. If you're looking at this from a resale angle I wouldn't even bother...

From a performance standpoint, if you don't have emissions constraints and you have the budget, there are ALOT more things that you can do to spruce up the power/torque numbers to well over 300 horsepower. The Motronic system is one of the first things I would discard...

You may also wish to remove the caps lock, it looks to many of us like you're yelling at us for some reason...

Ralph

[JeremyD]

I think if you are thinking about resale at this point - then think stock and think just valve guide replacement.

I think if you are thinking of spanking a z06 then get another car, or look at totally updating the engine to a 3.4 turbo. 8 to one compression, big honking intercooler, etc....

As Ralph mentioned, the Motronic will only take you so far in NA trim, Money/performance aside, I'd shop for a low mileage 3.6 that you can exhange. Even more grunt, would mate well to your g-50, cost basis it will be similiar.

[Facey]

i am also of the belief that you can get into z06 range.

figure u need close to 400 fwhp. and that is a possible number, however u will also need to lose some weight (not u, your car....though unknown to me, it is often cheapest for the driver to lose some also).

if you come in under 3000lbs with >350hp you should be able to hang with most cars within reason.

and ya....if u want to smash them, talk to (henry?) @ AMS...he is on the board here, and is presently toying with the idea of using Garrett BB turbos on a porsche.... he is talking of 500hp range....and that would crush other hyper cars.

but really, unless you'll be on a regular basis toying with huge engine monsters (6+L, 500+hp) you'll find that anything above 250hp in the relatively light and nimble older 911's is TONS!!!!

i need to up my hp, cause on a weekendly basis i do see some wild cars, tuned GTR's, 300zxTT, and worst of all those pesky little GTi-R....unbelieavble how fast they are with a little this and that.
-i'm not street racing at all, and i tell my buddies that do it that they are idiots....however the odd highway roll on is just good fun :P

hope u make the correct desicion.

[kepperly]

Guys,
I thank you all for your imput and at this point I think with an Ollies head rebuild, good valves& springs. new cams chains, rod bolts is as far as I'm going to go besides the the rest of while you in ther things. Clutch, pp, t/o bearing, trans seal, oil cooler cleaning.
But I very appreciate the info and When it starts I will try to post some photos for those interested.

Keith Epperly
87 slant nose turbo look carrera cabriolet

ps sorry about the caps I just get lazy sometimes no offence!!

[Jeff Alton]

How about a mild cam like a 964 (cheap) and a matching steveW chip. I have built two 3.2's with that combo (one with SSI's) and it is a cost effective upgrade. (around 750 ish for the mods)

Cheers