|
|
|
|
| Author |
|
|
Registered
|
Slide Injection or PMO Carbies???
I am hoping you guys can assist me??
I am having built a 3.5L (300 - 320 HP) RSR Stroker engine using a 3.0L base and 3.2L Crankshaft for a replica 1974 RSR project. And I was wondering whether Slide Injection is better than PMO Carbies. Which will add more power? Be more Driveable? Cost Effective?? I love to know your thoughts.
__________________
2005 996 Twin Turbo 1973 RS Carrera with 2.8 RSR Engine 2005 BMW X5 |
||
07-06-2007, 03:36 AM
|
|
|
Registered
Join Date: Jun 2006
Location: Texas
Posts: 2,325
|
Better???
More "power" at full throttle, slides. If your heads flow that well. More drivable. PMO's Cost Effective. PMO's Most Cool. Slides. Regards, Bob |
||
|
07-06-2007, 04:07 AM
|
|
|
Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,764
|
Quote:
slide injection with the neccesary well tuned EFI system will be infinately "more driveable" PMOs will be more cost effective, slides+EFI etc adds up to some serious coin quickly
__________________
Don't feed the trolls. Don't quote the trolls  http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
||
|
07-06-2007, 07:37 PM
|
|
|
Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 11,991
|
Bob may have been reffering to slides + MFI. Not sure though....
Cheers
__________________
Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
||
|
07-06-2007, 08:44 PM
|
|
|
Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,764
|
Quote:
Heck I know a few people who have removed the PMO upgrade to reinstall the webers.. But thats another subject
__________________
Don't feed the trolls. Don't quote the trolls http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
||
|
07-06-2007, 09:46 PM
|
|
|
Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 11,991
|
Well Richard was having some QC issues with his foundry from what I understand, but I think that is on its way to being resolved. Hence the backorder if you try to get a set of carbs right now.....
Cheers
__________________
Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
||
|
07-06-2007, 09:58 PM
|
|
|
|
Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,764
|
no these were hardly foundry issues, these were people who had run webers with solid mounts, who upgraded to the new better PMOs only to have them perform less than the webers did.. I think the solid mount disclaimer is a cop out....
in any event this is off topic from the original posters question.. Why not barrel valves? I have a link for carbon barrle valves but cant seem to find it now
__________________
Don't feed the trolls. Don't quote the trolls http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
||
|
07-06-2007, 10:06 PM
|
|
|
Registered
|
Why not barrel valves?
I have a link for carbon barrle valves but cant seem to find it now [/B][/QUOTE] This Sounds interesting tell me more?? was this the link you were looking for?? http://www.protechnik.com/custom.html
__________________
2005 996 Twin Turbo 1973 RS Carrera with 2.8 RSR Engine 2005 BMW X5 |
||
|
07-06-2007, 10:20 PM
|
|
|
Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 11,991
|
Hmm, okay, I have not had the pleasure of tuning a motor with webers back to back with PMO's...... I will leave it for another thread, I agree..
Although I have not fired up my Jenvery ITB's, they sure seem like a quality made product. I guess when I post the dyno graphs in a couple of months we will know if they work...... Cheers
__________________
Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
||
|
07-06-2007, 10:31 PM
|
|
|
Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,764
|
carbon fiber plenum w/ barrel valves. I,ve seen carbon fiber valves theough I cant find a pic
http://www.jmengines.com/index.htm http://www.lumenition.com/new/main.php/throtb/
__________________
Don't feed the trolls. Don't quote the trolls http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
||
|
07-07-2007, 07:45 AM
|
|
|
Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 11,991
|
Those are interesting, I would love to see a cut away pic or drawing of them.
Cheers
__________________
Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
||
|
07-07-2007, 08:49 AM
|
|
|
Registered
Join Date: Jun 2006
Location: Texas
Posts: 2,325
|
Jeff knows that my being an old fart I would just think slides=MFI. I also connect them with hi rev race motors.
Oh well it just comes with the years. The barrel valves do look interesting. Bob |
||
|
07-07-2007, 09:08 AM
|
|
|
|
Max Sluiter
|
my 2 cents
Sorry to interrupt, but slide-valve mechanical fuel injection is AWESOME!
, IMHO.
__________________
1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
||
|
07-08-2007, 01:55 PM
|
|
|
Registered
|
I think the barrel valve is just a solution to the problem of not being able to use slide valves on a forced induction motor. If you're not boosted, slide valve is the way to go.
__________________
2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
||
|
07-10-2007, 04:38 AM
|
|
2005 & 1974 Porsche Turbo & 911 3.6 TT & 2.7L
1971 Porsche 911S
1979 Porsche 930 3.4
