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Brando
 
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Look at pauls, plenty of room
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Turbo powa!
1977 911s. it's cool
Old 06-14-2008, 01:30 PM
  Pelican Parts Technical Article Directory    Reply With Quote #21 (permalink)
Crotchety Old Bastard
 
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For the stock intercooler to fit under the duck you remove the rubber shroud and grind down the shroud lip that goes around the cooler. I think that's it.

In this picture you can clearly see the air grill area I plan to fill with intercooler.


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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
Old 06-14-2008, 01:39 PM
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Turbo 13b guy
 
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Here's a pic of the liquid to air. Its a Garrett and they were used on the Syclone/Typhoon turbo awd GMC trucks standard as well. I have hard metal line running to an aftercooler in the passenger wheel well(size of a big oil cooler) and a pump mounted up front. At 13 psi I have zero knock. Many Syclone people have run big boost through them and made retarded power with no issues at all.

Probably wouldnt be the best option for road racing but for drag racing and a fun street car it does wonders. Think about heat transfer going from 100* outside and going into a 60* room and then jumping into a 60* pool. Water absorbs that heat much better. The car originally used the stock Turbo II RX7 topmount IC with a fan. Worked well and I still have it if you wanted it. Cheap and gets the job done. Pics of the rx7 cooler:


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Old 06-14-2008, 01:44 PM
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I don't know as I would characterize the stock Porsche intercooler as a "stock crappy one". I think for the engineering department to have installed a "crappy" intercooler would not have suited Porsche's reputation very well. I think that for the stock applications they were running, the intercooler was adequate....note the word adequate, not exemplary or outstanding...but adequate. The stock 3.3L turbo for the US market was rated at 282 hp....and other than a bit of heat soak, it seemed to perform "adequately", and did so since it out performed most of the competition at the time. It was also designed to fit under the tail and accomodate the air conditioning....which incidentally was a feature that they had to put in to satisfy the picky US demands. It works a lot better without the AC.
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Old 06-14-2008, 03:19 PM
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hmmmm. The original intercoolers have so much restriction, cause so much pressure drop that they are hardly worth installing.The C2 units are actually quite good and hold their own against aftermarket units of similar size but don`t bother with anything made earlier,even that RX-7 unit would be a better choice..
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Old 06-15-2008, 11:19 AM
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I'm thinking of experimenting with one of these:

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&Item=140239595699&Category=6763&_trksid=p3907.m29

the exit is pretty much perfect for a 3.2, you could fab a pipe to the entry easy enough or get a different entry end tank welded on and look at the price!
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Old 06-15-2008, 07:50 PM
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Crotchety Old Bastard
 
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This is similar to what I plan to do using CIS under the duck:

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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
Old 06-16-2008, 06:32 AM
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That is a great set up.

Was that under a stock deck w no A/C?

I think a duckie has a bit more room.
Old 06-16-2008, 07:12 AM
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This is mine...in my '89. It took approx. 8weeks of fab time, design time and testing.

My aim was:
1) Retain the A\C
2) Have it fit under the stock hood
3) Make it extremely efficient, minimal psi drop and overall well designed
4) Have a core larger than the Kokeln (which is 642cu.in)
5) Cheaper than the Kokeln
6) Easy to remove
7) Has to look good!

The results:
1) A\C retained - Yes!
2) Fits under the stock hood - Yes with some convincing (wink)!
3) Efficient - Yes!!! - Bar and plate core - rhomboid shaped, giving the air slightly more distance to travel and hence cool before entering the TB. The rhomboid core was extremely difficult to cut and mate to the end tanks, as opposed to the typical square \ rectangular IC cores. Pressure drop only 0.45psi at 14psi inlet.
4) Core volume - 685cu.in, so larger volume that the Kokeln
5) Cost was cheaper than the Kokeln
6) I can remove it in about 10minutes
7) Looks incredible - I think!

I had to remove the rear wiper to make it fit and also slightly notch the rear deck lid where it was rubbing, easily and neatly done and repainted.

Here it is:
Side by side with the stock:




Regards - Yasin
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Old 06-16-2008, 07:54 AM
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Quote:
Originally Posted by slow&rusty View Post
This is mine...in my '89. It took approx. 8weeks of fab time, design time and testing.

Regards - Yasin
If you don't mind sharing, how much did you spend Yasin?
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Old 06-16-2008, 08:39 AM
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Yasin,

Who makes you core and what size did you start with?

Did you measure the pressure drop or is that the rating?

Any other mods like porting or cams?

Nice job.

Thx
Old 06-16-2008, 09:06 AM
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What is required to achieve this?

I plan a 930 exhaust set up, stock or B&B style copy.
How is heat then accommodated?
What motor tin do I need for heat?
I would have to relocate my A/C condenser to rear fender, or upgrade to C2 in rt ft fender, or use a shorter after market on deck if I/C is to one side. (Do not want a belly condenser.)


Quote:
Originally Posted by RarlyL8 View Post
This is similar to what I plan to do using CIS under the duck:

Old 06-16-2008, 09:21 AM
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l see some really good solutions here but there is one more solution for your intercooling dilemma- Aquamist! You can install a first class water injection system for about $500- and this will accomplish both cooling the charge and act as anti-detonate. l just bought a Jackson Racing "liquid intercooler" system ( re-badged Aquamist pump )and l intend to use this in addition to the full bay cooler l currently have installed. My plan is to run a 2 stage boost setting with the water/methanal operating on second stage only. l realize that one downside to liquid intercooling is running out of the liquid but sensible installation eliminates the pitfalls. You can run an adjustable Hobbs switch to fire the cooling charge at a preset boost level and a bright warning light for low fluid can be placed in the cockpit much like a shift light.lf you are going to run electronic boost control (recommended) this can be set up so that high boost will be impossible if the fluid is low.l intend to install my system wth these features so if you`re interested l can show you my methods.
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Old 06-16-2008, 10:16 AM
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Turbo 13b guy
 
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^Methanol works great with high boost applications but if you are getting no knock on pump gas with the current setup, I wouldnt bother.
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Old 06-16-2008, 10:27 AM
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Crotchety Old Bastard
 
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911st - you would need to use the 930 style heat/fan ducts with the 930 heat exchangers.
The A/C condenser can be placed in many spots (most are placed on a shelf in the garage - ha!)
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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
Old 06-16-2008, 10:59 AM
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Brando
 
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Some cool scuz the pun, ideas. I like the idea for me to use the stock piece to start and play later as I have it all running and comfy. Thanks for some kick azz ideas. so far. BA
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Old 06-16-2008, 11:14 AM
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So 930 side tin w ducts on each side of the fan(or 74 side tin?). Use the existing hear ducting for the Turbo comressor tube. Put the air/filter at the turbo under the car?
Old 06-16-2008, 11:32 AM
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Quote:
Originally Posted by polizei View Post
If you don't mind sharing, how much did you spend Yasin?
I spent around $1400-$1500, not including some aluminum pipes I fab'd, silicone couplings and t-bolt clamps

Quote:
Originally Posted by 911st View Post
Yasin,

Who makes you core and what size did you start with?

Did you measure the pressure drop or is that the rating?

Any other mods like porting or cams?

Nice job.

Thx
Core was sourced from Bell Tech Intercoolers in Spring, TX. I measured the pressure drop, I cannot remember all the dimensions but can measure it tonight when I get home. No cams or porting on my internally stock car..
My best- Yasin
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Old 06-16-2008, 12:32 PM
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Thx!
Old 06-16-2008, 01:27 PM
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Wow, that's an ambitious DIY project Yasin, Good job!
Old 06-17-2008, 09:58 AM
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