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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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 Posted: Tue Jul 10, 2007 7:55 am Post subject: Intercooler Efficiency*Pics* |
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Well Guy's,
After much thought and research, i think i have managed to fabricate a low pressure draw through system for the front mounted 951 IC. Having looked at the air pressure diagrams posted here previously, and doing a bit of parallel research, i think i've hit the jackpot. I had this set up for the Castle Combe race, which i won, despite very nasty weather and being totally outgunned in the HP department. It seems to have made the mid range much fatter, so the engine is not such a hand grenade in it's power delivery. I have fitted a pre IC temp sensor as well as having a post IC sensor, so i will be able to give some real world figures as to temperature drops across the IC in real world conditions.
All i can say is that at the moment, going by the seat of the pants power meter, it seems to work a charm.
Enjoy,
Steve
 [/img]
Last edited by bass gt on Thu Jul 12, 2007 2:07 am; edited 2 times in total |
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flosho
Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin
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| Posted: Tue Jul 10, 2007 8:01 am Post subject: |
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Very nicely done! They make very similar hoods for the evo and rx7s, so I would be willing to bet that you definately helped the cause.
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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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| Posted: Tue Jul 10, 2007 8:05 am Post subject: |
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Cheers Flosho,
next race is on the 21st, so i will be able to get some meaningful data. Will be interesting i guess. Might rig up a big fan and light some cigarettes and do some ad hoc wind tunnel research 
Steve |
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924RACR
Joined: 29 Jul 2001
Posts: 9075
Location: Royal Oak, MI, USA
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| Posted: Tue Jul 10, 2007 8:54 am Post subject: |
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<droool>
I am in lust with your car!!! Makes mine look like a total beater!
Doh! It is!!! 
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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Lizard
Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada
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| Posted: Tue Jul 10, 2007 9:08 am Post subject: |
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looks very very purdy,
is it bad that I am tempted to get a ticket to england and watch your next race?
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3 928s, |
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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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| Posted: Tue Jul 10, 2007 9:17 am Post subject: |
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| Lizard wrote: | looks very very purdy,
is it bad that I am tempted to get a ticket to england and watch your next race? |
Bad Lizard, VERY BAD Lizard!! 
well, if you ever find yourself this side of the pond, and are at a loose end, come and checkout Simsport and myself campaigning the old girls. Actually, there are quite a few 24's in the Championship, in all classes, although i seem to be the only mug who thought it would be a great idea to pitch a 24T against the big boys. Still, I've always loved an unfair fight 
However, once i get some meaningful data, this might be a mod worth looking in to, even for a road car. Get a spare hood and give it a whiz.
Steve |
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Chrenan
Joined: 15 Jan 2003
Posts: 3903
Location: Canada
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| Posted: Tue Jul 10, 2007 10:26 am Post subject: |
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Looks amazing, what a novel idea on a 924 turbo, I don't even think I've ever seen that on a 951, nevermind a 931.
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1987 951 - M193 Version for Japan |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Tue Jul 10, 2007 10:34 am Post subject: |
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Is all the intake air from the 4 plastic vents?
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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| Posted: Tue Jul 10, 2007 10:38 am Post subject: |
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| Paul wrote: | | Is all the intake air from the 4 plastic vents? |
Yes, but the IC has a scoop/shroud around the front of it to funnel the air into it. as per Mr. Bell's book, apparently an IC only needs an air inlet 1/4 the size of it's frontal area.
The scoop extends forward to about 2 inches from the 4 nose scoops, so the air is fairly forced through.
Steve |
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flosho
Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin
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| Posted: Tue Jul 10, 2007 10:55 am Post subject: |
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I've thought about using a set up similar to this after seeing nicks car with the intercooler in front of the engine.
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J1NX3D
Joined: 06 Feb 2003
Posts: 1333
Location: New Zealand
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| Posted: Tue Jul 10, 2007 11:10 am Post subject: |
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OH MAN...
that is sexual...
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'86 944 |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Tue Jul 10, 2007 11:50 am Post subject: |
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Nice!
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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endwrench
Joined: 07 Dec 2002
Posts: 1631
Location: Victor, Montana
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| Posted: Tue Jul 10, 2007 12:14 pm Post subject: |
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Beauty!! I even like the way it looks from the outside. Must be a pretty nice low pressure area right there. Can't wait to see the temp readings.
Todd
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'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!.... |
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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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| Posted: Tue Jul 10, 2007 12:38 pm Post subject: |
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| endwrench wrote: | Beauty!! I even like the way it looks from the outside. Must be a pretty nice low pressure area right there. Can't wait to see the temp readings.
Todd |
As soon as i get some meaningful data i'll post it up |
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-nick
Joined: 16 Nov 2002
Posts: 2699
Location: Cambridge, MA
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| Posted: Wed Jul 11, 2007 1:11 am Post subject: |
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You really do some expert fab work! The only trouble with trying to duplicate it for a road car is messing with the hood latch / pins. Otherwise, it looks like an excellent advantage!
I'll check into adding an extra intake air temp sensor on my turbo outlet to see how mine compares. I think I typically run around 40F over ambient temp or so.
You're getting to the point where I can't even think of any tricks to add to your ride! Truly a beauty!
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1980 931S
15psi boost, MS-II, EDIS, 951 IC, custom intake, Ford 5.0L throttle body, Forge BOV, WB o2, G31 w/LSD, 964 wheels, 968 rear sway, Bilsteins, 200# Welt. springs. A laptop, and a partridge in a pear tree.
1991 964 C4 Cabriolet |
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