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rice_beater
Joined: 29 Mar 2005
Posts: 41
Location: Sydney, Australia
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 Posted: Fri Jul 08, 2005 2:34 pm Post subject: supercharged |
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| i was wondering if anybody has supercharged a 924 and if so what do you recomened and what do i have to do to prep the engine for it. |
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J1NX3D
Joined: 06 Feb 2003
Posts: 1333
Location: New Zealand
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| Posted: Fri Jul 08, 2005 3:01 pm Post subject: |
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do a search dude. this topic has becn covered e-x-t-e-n-s-i-v-e-l-y!
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'86 944 |
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kojab
Joined: 02 Nov 2002
Posts: 61
Location: Sydney Australia
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simsport
Joined: 06 Nov 2002
Posts: 573
Location: UK Warrington
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| Posted: Sat Jul 09, 2005 3:31 am Post subject: Blower |
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I have one also. The car has been running this way for 4 years now.
Goes well, 205bhp.
Cheers
Simon
http--mysite.wanadoo-members.co.uk/Super924
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Blown is always best! |
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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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| Posted: Sat Jul 09, 2005 5:48 am Post subject: |
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Ooohh Simon,
Amazing that your car makes 205bhp!! If i recall, thts the limit for our class in the speed championship..
I shall be contacting the MSA to have your car impounded and it's engine stripped, just to be sure of course 
So where are you racing next?? |
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morghen
Joined: 21 Jan 2005
Posts: 9102
Location: Romania
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| Posted: Sat Jul 09, 2005 8:09 am Post subject: |
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simsport...yours was a 924NA..right ? what pistons are you using ? whats the compression ratio for your engine ?
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Supercharger and EFI kits
https://www.the924.com |
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endwrench
Joined: 07 Dec 2002
Posts: 1631
Location: Victor, Montana
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| Posted: Sat Jul 09, 2005 8:35 am Post subject: |
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OK Kajob, you have peaked my interest very much. Would you be so kind as to answer a few questions for me? Please!
1) What is that blower from?
2) What size is it?
3) How much is it overdriven to acheive your 13lbs of boost?
4) What is the tensioner from?
5) How many ribbed belt are you using?
6) How is the actual throttle response with your throttle set before the blower? It looks by your data graphs that boost is nearly intantaneous to throttle position.
7) Did you do anything to the stock 931 ignition? Any pinging problems?
 What are you using for fuel control?
9) Finally, what kind of injectors are those and what size are they?
Thanks, 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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Peter_in_AU
Joined: 29 Jul 2001
Posts: 2745
Location: Sydney, Australia
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| Posted: Sat Jul 09, 2005 11:15 am Post subject: |
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endwrench
click on "Profile" under kojab's post and then click the "Show all posts by kojab" link and check his previous posts. He's posted a lot of info on the conversion and especially on the conversion to EFI using a GM/Delco computer.
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1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)
Learn to love your multimeter and may the search be with you |
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endwrench
Joined: 07 Dec 2002
Posts: 1631
Location: Victor, Montana
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| Posted: Sat Jul 09, 2005 3:25 pm Post subject: |
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OK Peter, sometimes I just need a gentle slap upside the head with a 2x4 in order to get it out of a particular orfice  
After doing a search of kojab's post I have answered most of my own questions. It is a Toyota blower rated at 1.4Liters. Injectors are GM new style 36lb. I have seen them before but can't remember where. Fuel and spark are controled with a Delco ECM using his own design software tuning package. Very impressive!
The only question I still have is "What is the overdrive ratio on the blower?".
If anyone knows the size of the stock pulley on the blower I can probably figure it out from the pictures posted at his web page.
Todd |
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Peter_in_AU
Joined: 29 Jul 2001
Posts: 2745
Location: Sydney, Australia
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| Posted: Sat Jul 09, 2005 10:50 pm Post subject: |
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I'd suggest a google session looking for "toyota sc14 pulley size" will probably be revealing (the sc14 is the 6-cylinder supercharger that kojab's running. The sc12 is the smaller supercharger from the Mk1 MR2).
_________________
1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)
Learn to love your multimeter and may the search be with you |
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simsport
Joined: 06 Nov 2002
Posts: 573
Location: UK Warrington
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| Posted: Sun Jul 10, 2005 5:41 am Post subject: MIRA |
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| bass gt wrote: | Ooohh Simon,
Amazing that your car makes 205bhp!! If i recall, thts the limit for our class in the speed championship..
I shall be contacting the MSA to have your car impounded and it's engine stripped, just to be sure of course
So where are you racing next?? |
Its oooh so legal. Its almost saint like its so legal.....erm...well yes honest guv.
The MSA will impound it if you pay your 150 quid fee, thats always assuming I havn't asked them to look at yours first!!
I'm at MIRA Next Sat for a sprint. Its a bit of an odd venue, no cameras etc all very hush hush in case we spot the next Merc etc on the handling circuit.
If you were coming up for a look I may be able to get you in as support crew (seriously they take no prisoners in keeping the public out). If you were going to we'd have to agree to meet outside the gates. I will have a spare pass as er indoors is staying at home again.
Anyway, if I dont see you there I'll wait till you bring that P2...Ooops , sorry P3 car out!!! 
Cheers
Simon
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Blown is always best! |
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simsport
Joined: 06 Nov 2002
Posts: 573
Location: UK Warrington
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| Posted: Sun Jul 10, 2005 5:43 am Post subject: Pistons etc |
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| morghen wrote: | | simsport...yours was a 924NA..right ? what pistons are you using ? whats the compression ratio for your engine ? |
Hi there.
I use JE pistons, ratio is 8.5:1
Cheers
Simon
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Blown is always best! |
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morghen
Joined: 21 Jan 2005
Posts: 9102
Location: Romania
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| Posted: Sun Jul 10, 2005 6:23 am Post subject: |
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ok thx i was thinking to get JE Pistons myself...could you share some more info ? like what other mods did you do the the engine itself...and the clutch?
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Supercharger and EFI kits
https://www.the924.com |
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CBass
Joined: 03 Nov 2002
Posts: 2807
Location: Vancouver, Canada
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| Posted: Sun Jul 10, 2005 6:43 am Post subject: |
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You're using a 931 head in that engine, aren't you Simon?
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'81 931 in various states of assembly |
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Raceboy
Joined: 01 Mar 2004
Posts: 2327
Location: Estonia, Europe
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| Posted: Sun Jul 10, 2005 5:11 pm Post subject: |
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IMO JE pistons aren't worth all that 650$ (+shipping) of cash, because they use the same heron design like OEM ones. Plus -nick has gone a few sets of them in a mysterious ways..... 
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'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold 
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche |
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924 FAQ (Technical)
