| View previous topic :: View next topic |
| Author |
Message |
emoore924
Joined: 13 Apr 2004
Posts: 2822
|
 Posted: Sat May 29, 2010 12:16 am Post subject: |
 |
|
FLOW RATE people, FLOW RATE. Do your fuel and air Lb/hr calculations (or lb/min if you like that better) and see how much air and fuel you're moving.
High boost just means you're trying to blow through too small a straw... |
|
| Back to top |
|
 |
simsport
Joined: 06 Nov 2002
Posts: 573
Location: UK Warrington
|
| Posted: Sat May 29, 2010 8:02 am Post subject: Re: Boost |
|
|
| morghen wrote: | | simsport wrote: | I know its not a turbo but...........with the supercharger at 11/12 psi I get 246bhp and 245lbft torque.
Cheers
Simon |
Hi Simon, good to know you're still around.
thats quite alot of power at only 0.8bar |
I know , I have got a roling road plot for this...somewhere..I'll send it to you as I cant quite get my head around how to get things on the list.
Key in this is the setup. Its got a huge and very effective intercooler plus Motec and M&W ignition. Compression is 8.5:1
cheers
simon
_________________
Blown is always best! |
|
| Back to top |
|
|
Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
|
| Posted: Sat May 29, 2010 9:28 am Post subject: |
|
|
Hey Simon, you heard from Bassington? People are wondering how he's doing.
_________________
Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
|
|
| Back to top |
|
|
AppleBit
Joined: 16 Nov 2002
Posts: 1516
Location: Minneapolis, MN
|
|
| Back to top |
|
|
morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
|
| Posted: Sun May 30, 2010 8:17 am Post subject: |
|
|
| Rasta Monsta wrote: | | Hey Simon, you heard from Bassington? People are wondering how he's doing. |
seen him on yahoo messenger a few weeks ago...he didnt reply...
_________________
Supercharger and EFI kits
https://www.the924.com |
|
| Back to top |
|
|
macBdog
Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia
|
| Posted: Mon May 31, 2010 10:40 am Post subject: |
|
|
[quote="AppleBit"] | macBdog wrote: |
I had that NA in my 924 a few years ago. Well, at the rear wheels. Now it's 350 rwhp... You can do it :-)but you gotta get rid of the 4 cyl and pop in an LS1  |
I have an iron head SBC. LS1 would be nicer, budget at the time kept me in oldschool land. Still loving it though. Next step will be some high comp alloy heads.
_________________
1979 931 with a 350 chev
1973 911E with EFI
| p-talk wrote: | I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways  |
|
|
| Back to top |
|
|
leadfoot
Joined: 11 Dec 2002
Posts: 2222
Location: gOLD cOAST Australia
|
| Posted: Mon May 31, 2010 7:09 pm Post subject: |
|
|
or 2 turbos mac...
S.
_________________
1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress... |
|
| Back to top |
|
|
SoyRacer
Joined: 25 May 2003
Posts: 156
Location: Long Island, New York
|
| Posted: Tue Jun 01, 2010 5:40 pm Post subject: |
|
|
| morghen wrote: | the 924 turbo engine should make 210 BHP at 0.8 bar with CGT or similar advance curves and a propper intercooler...and around 240BHP with 1bar and a good intercooler.
with 1.1 bar, propper advance curves a good intercooler + a tuned intake&exhaust + a fresh valve seat job you should see ~270.
i'm actually quoting from the CGT series.
CGT 210 HP 0.8bar poor intercooler
CGT-S 245 HP 1 bar good intercooler
CGT-S-CS 275-285 HP 1.1 bar good intercooler, tuned intake and exhaust
PS: 20PSI = 1.38bar..thats 1.4
At 1.4 bar...with propper timing and fueling, intake and exhaust sorted out + some head work one should see ~350BHP |
I wish I had placed the prinouts somewhere safe but.....
Those are the exact numbers I got with those boost levels on my car.
I only did one pull at each boost level, 15min delay in between for cooling off intercooler with ice and running 110 leaded race fuel (only run 110 since).
1.1 bar got us in the 270 range but spike to 1.3 was over 300 and A/F was scary lean. If it wasn't for the lead I know that there would have been trouble.
An idiot with an S2000 paid for the dyno time as he swore his 2.0 in N/A would make more power than my "shitty 1981 2.0 Porsche" ....... Like I said - He paid.
_________________
1973 911-RS 3.2 Track Car
1981 Porsche 931/Carrera GT Project
1981 Porsche 931 Euro W/CGT Intercooler
1984 Porsche 944 Gutted Track Car
1987 Porsche 924s Rally Style (sold 3-2012)
2000 Chevy C-2500 Pick-up
2004 Subaru Forester STi |
|
| Back to top |
|
|
Insane
Joined: 20 Jun 2009
Posts: 65
Location: Kyiv
|
| Posted: Tue Jun 01, 2010 5:49 pm Post subject: |
|
|
| SoyRacer wrote: |
I wish I had placed the prinouts somewhere safe but.....
Those are the exact numbers I got with those boost levels on my car.
I only did one pull at each boost level, 15min delay in between for cooling off intercooler with ice and running 110 leaded race fuel (only run 110 since).
1.1 bar got us in the 270 range but spike to 1.3 was over 300 and A/F was scary lean. If it wasn't for the lead I know that there would have been trouble.
An idiot with an S2000 paid for the dyno time as he swore his 2.0 in N/A would make more power than my "shitty 1981 2.0 Porsche" ....... Like I said - He paid. |
Great result! Can you answer few questions then?
- what head do you have? any headwork?
- what's the CR?
- what turbo do you use? |
|
| Back to top |
|
|
9xx
Joined: 18 Jun 2006
Posts: 627
Location: Jarvenpaa, Finland
|
| Posted: Thu Jun 03, 2010 4:58 am Post subject: |
|
|
On a finnish Porsche forum one guy just finished his engine work with his 931 and got it dynoed: power 260hp, torque 330Nm @ 1,25 bar. Wiseco pistons, Megasquirt, FMIC and bigger injectors. Otherwise stock.
_________________
Mikko
All gone: 931 '82 Alpine White, original option "220" G31 with LSD + 3 x 944 |
|
| Back to top |
|
|
morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
|
| Posted: Thu Jun 03, 2010 5:21 am Post subject: |
|
|
thats a poor result for 1.25bar or are the 260 RWHP?
_________________
Supercharger and EFI kits
https://www.the924.com |
|
| Back to top |
|
|
Cedric
Joined: 27 Aug 2004
Posts: 2809
Location: Sweden
|
| Posted: Thu Jun 03, 2010 5:26 am Post subject: |
|
|
| morghen wrote: | | thats a poor result for 1.25bar or are the 260 RWHP? |
Compared to what? Most of these results are done on rollers and thus makes it very hard to compare numbers to anyone else.
_________________
1980 924 Turbo
www.instagram.com/garagecedric/ |
|
| Back to top |
|
|
morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
|
| Posted: Thu Jun 03, 2010 5:44 am Post subject: |
|
|
| Cédric wrote: | | morghen wrote: | | thats a poor result for 1.25bar or are the 260 RWHP? |
Compared to what? Most of these results are done on rollers and thus makes it very hard to compare numbers to anyone else. |
you are right...but 1.25 bar is quite alot...maybe the stock turbo is bad and just pushes heat from 250 upwards.
_________________
Supercharger and EFI kits
https://www.the924.com |
|
| Back to top |
|
|
SoyRacer
Joined: 25 May 2003
Posts: 156
Location: Long Island, New York
|
| Posted: Thu Jun 03, 2010 10:13 am Post subject: |
|
|
| Insane wrote: | | SoyRacer wrote: |
I wish I had placed the prinouts somewhere safe but.....
Those are the exact numbers I got with those boost levels on my car.
I only did one pull at each boost level, 15min delay in between for cooling off intercooler with ice and running 110 leaded race fuel (only run 110 since).
1.1 bar got us in the 270 range but spike to 1.3 was over 300 and A/F was scary lean. If it wasn't for the lead I know that there would have been trouble.
An idiot with an S2000 paid for the dyno time as he swore his 2.0 in N/A would make more power than my "shitty 1981 2.0 Porsche" ....... Like I said - He paid. |
Great result! Can you answer few questions then?
1- what head do you have? any headwork?
2- what's the CR?
3- what turbo do you use? |
-1- Stock Euro 931 cylinder head - No work.
-2- Stock for Euro S2
-3- Stock for euro S2
Basicly Stock euro S2 which is identical to Carrera-GT
I don't think that the boost levels are safe on pump gas. I only run 110 leaded in this car as it's not really that much of an investment if you consider the consequences.
RR
_________________
1973 911-RS 3.2 Track Car
1981 Porsche 931/Carrera GT Project
1981 Porsche 931 Euro W/CGT Intercooler
1984 Porsche 944 Gutted Track Car
1987 Porsche 924s Rally Style (sold 3-2012)
2000 Chevy C-2500 Pick-up
2004 Subaru Forester STi |
|
| Back to top |
|
|
gegge
Joined: 27 Jul 2007
Posts: 1124
Location: Sweden
|
| Posted: Thu Jun 03, 2010 5:12 pm Post subject: |
|
|
My brothers S1 931 @ 1,1bar:
http://www.youtube.com/watch?v=pT6bV0IaE5Q
Stock engine except from a large FMIC and an additional coldstart valve triggered at 0,8bar dropping the controlpressure. The turbo is a K26 from a late 951. Been running/competing for 9 seasons without problems. He bought it earlier this spring and this was his first run. The brake balance was awful and locked the rear wheels, that´s why he is taking it nice and slow
Don´t know the HP, guessing 230-250...
_________________
Carl Fredrik Torkildsen
924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
924 FAQ (Technical)
