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Join Date: Nov 2008
Location: LA-Lower Alabama
Posts: 288
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Cliyde,
I'm really interested in this upgrade. I always thought you required new pistons and low compression. I'm willing to spend a few grand...well worth the investment. I guess I will start collecting needed parts.
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1986 Porsche Carrera  1997 Porsche Boxster (Sold) :0 1995 911 Cabriolet (Sold)  1971 Porsche Targa 911E (Sold) 
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07-01-2011, 11:42 AM
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Grappler
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You might want to pad that a little. I'm doing the same thing, trying to be as cost effective as possible...I'm approaching 4k and still have more pieces to source. Thats not counting an intercooler and a new tail & paint to accommodate it. No, not all my parts were new either... 
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Grappler Know Gi / No Gi 1976 RSR Backdate (Turbo 3.2) |
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07-01-2011, 01:19 PM
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Location: Hurricane Region, NC
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Many of the parts can be sourced right here from this board!!! You won't be disappointed with a turbo conversion, I can assure you!
Cheers! Quote:
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- '88 911 (3.6 Transplant, Big Reds, Coilovers, & Headers) - '12 Audi B8 S4 (6MT) - SOLD! '84 911 3.2 Turbo Targa - SOLD! '85 928S 5sp with LSD |
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07-01-2011, 01:21 PM
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Join Date: Feb 2010
Location: Houston, TX
Posts: 76
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Currently adding twin K16 turbos to my 93 964 (low boost), so this is great information.
Surprise to see that you can safely run that much boost without an intercooler if you have not reduced compression, thought that it was more like 5 lbs, but good to know. Excellent work and details. Now reference material for me 
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07-08-2011, 07:53 PM
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Location: Hurricane Region, NC
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Sheriong, I don't believe the same boost levels would apply to your 964 engine with considerably higher compression. I believe the 964 compression is somewhere at or below 11.3:1, while the Carrera has 9.5:1 - You may want to do more research and find what reliable boost levels can be run. Good luck with your project and post up some pics of your build when you get a chance.
Quote:
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- '88 911 (3.6 Transplant, Big Reds, Coilovers, & Headers) - '12 Audi B8 S4 (6MT) - SOLD! '84 911 3.2 Turbo Targa - SOLD! '85 928S 5sp with LSD Last edited by cliyde; 07-09-2011 at 08:00 AM.. |
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07-09-2011, 07:54 AM
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Grappler
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You are correct. The compression ratio for the 93 3.6 ltr is 11.3:1 and that is way to high for even considering any type of forced air induction.
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Grappler Know Gi / No Gi 1976 RSR Backdate (Turbo 3.2) |
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07-09-2011, 08:04 AM
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Crotchety Old Bastard
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There are kits on the market to supercharge a 993 engine. I have never understood how this would be possible and have the engine live for any amount of time. I have also never seen or heard about any of these supercharged engines with any miles on them so maybe that question is answered.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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07-09-2011, 08:29 AM
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Registered User
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Location: Houston, TX
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Cliyde, Thanks that answers that question. The 5-6 lbs max with an intercooler is what those who have supercharge the later models run safely and there are low boost kits around for the cars, Protomotive sold a twin turbo kit, plus others have done some personal builds.
Protomotive Stage 1 Twin Turbo Install DIY - Rennlist Discussion Forums My 1995 NA to turbo project progress - Rennlist Discussion Forums Sheriong |
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07-09-2011, 11:59 AM
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Location: Milwaukee, WI
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Quote:
I have some left overs if you are interested. Good Luck!
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Jeremy C. Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham) ----Nothing is far away in this car!--- -2002 996 C4S -2008 550i M-Sport |
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07-09-2011, 02:15 PM
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I currently have a pretty comprehensive grouping of parts for this conversion for sale in the classifieds...took a number of years to put it together.
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1986 3.2 Carrera |
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07-10-2011, 06:26 AM
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Location: louisiana
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good read Cliyde. Thumbs up!
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07-27-2011, 06:27 AM
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Join Date: Mar 2011
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Cliyde: Top grade work on documenting your project! Hopefully one day I can use this thread as a build manual.
One question: Is there actually space for any size or shape intercooler? |
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07-30-2011, 08:54 AM
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MMMickey, having kept the A/C there is very little room under the ducktail for an IC (mainly because of the condensor). There are a couple of options I'm exploring, but have not had time to experiment. I'm looking at a small rectangular core to fit between the fan and rear latch area. It would have to be slightly angled to fit, but I should have clearance height wise. The other IC option is fitment over the distributor area (like stock 930 IC), but I'm not really sure it has the efficiency potential.
Quote:
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07-31-2011, 04:16 AM
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Cross post:
What do you guys think about this Intercooler? It looks like it just might fit underneath the ducktail. HP: 400+ 2.5" Inlet & Outlet Overall Size: 24" Wide x 6.5" high x 3" Thick (24"x6.5"x3") Core Size: 18" wide x 6.5" high x 3" thick   This intercooler is good for over 400 HP. Garrett bar & plate high density GT series Intercooler. Comes with 2.5" round inlet & outlet w/ intergraded no-slip-lip. Extreme strength to weight ratio & advanced core design. These are the very most maximized efficiency air to air intercoolers on the market today. Utilizing precision TIG welding, solid aluminum construction. We have seen a 36 HP increase using the Garrett high density GT series I/C compared to the cheap "bar & plate" intercoolers found on many auction sites. The test car yielded a reduction in turbo response time by 200 RPM. Length of IC should not be a problem, width is my only concern. In example, the box measures 6" Width and 5" high. I have about 1/2 - 3/4 inches room left to right (condensor to ducktail). It would be tight, but looks do-able. 
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- '88 911 (3.6 Transplant, Big Reds, Coilovers, & Headers) - '12 Audi B8 S4 (6MT) - SOLD! '84 911 3.2 Turbo Targa - SOLD! '85 928S 5sp with LSD Last edited by cliyde; 08-08-2011 at 08:27 AM.. |
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08-08-2011, 08:25 AM
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It looks like the AC condenser is consuming the open area needed to draw cool air into the IC.
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08-08-2011, 08:23 PM
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Join Date: Mar 2011
Posts: 118
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Hmm... Why not make a dummy out of cardboard first? Good luck!
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08-09-2011, 08:01 AM
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Registered User
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Using the exact dimensions I mean
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08-09-2011, 08:02 AM
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MMMickey,
I did cut several boxes down to size and it looks like 6" is max that will fit with the rear condensor in place. I'm on the fence about what to do... I looked at a Griffin Kuel unit to put in wheel well so I could remove rear condensor. Leaving it in place there are limited options (pre-fabbed) for small IC's. Best I can come up with is tube/fin design which is 2.5" thick x 6" 20"+ long. If I remove the condensor then "sky's the limit" Quote:
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- '88 911 (3.6 Transplant, Big Reds, Coilovers, & Headers) - '12 Audi B8 S4 (6MT) - SOLD! '84 911 3.2 Turbo Targa - SOLD! '85 928S 5sp with LSD |
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08-09-2011, 08:58 AM
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Did some test fitting on the intercooler yesterday. This one's a "bar-plate" 11x12x3 core which should just barely clear "the duck" when closed. Only weights 8lbs too. Soon as falls rolls around I'll be more inclined to discharged the A/C and pull the rear condensor for final fitment!
  
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- '88 911 (3.6 Transplant, Big Reds, Coilovers, & Headers) - '12 Audi B8 S4 (6MT) - SOLD! '84 911 3.2 Turbo Targa - SOLD! '85 928S 5sp with LSD |
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09-04-2011, 03:36 AM
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Registered User
Join Date: Jan 2007
Location: Melbourne, Australia
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Looks great cliyde, hopefully it gets decent airflow, Chris at Turbokraft said their non tail intercooler lacked the airflow needed to cool it down. Have you thought about before and after temp sensors? Andial make a kit. Would be interesting to see how efficient it is.
 These guys achieved extra airflow flow by creating fins, they look a little dramatic, I spoke to the owner of the business, he said it made a huge difference...:  
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'89 911 M491+Turbo '89 944 Turbo '88 928S4 '18 C63S Coupe |
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09-04-2011, 08:03 PM
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RSR Backdate
78 Porsche 911SC 3.0L, 3.3Turbo soon. 
