|
|
|
|
| Author |
|
|
Formerly bb80sc
Join Date: Aug 2001
Location: Hollywood Beach, CA
Posts: 4,361
|
50mm PMO's too big for a 3.0l?
Came across a set of 50mm PMO's for sale. Too big for a stock 3.0l? How about a 3.0 with higher compression and wilder cam? I assume they could be jetted down?
TIA! -Brad
__________________
Cheers -Brad 2015 Cayman GTS 2015 4Runner Limited |
||
02-24-2006, 01:36 PM
|
|
|
Light,Nimble,Uncivilized
|
Re: 50mm PMO's too big for a 3.0l?
Quote:
I've heard that even 46mm PMO's are a bit much for a street car, although with high CR and cams they might be OK. 40's for a stock to mostly stock motor. 50's would probably be better suited to a larger displacement race motor that's going to see WOT a lot. BTW, how much?
__________________
Drago '69 Coupe R #464 |
||
|
02-24-2006, 02:25 PM
|
|
|
Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
|
The throttle plates are to large to create fuel atomization properly on a stock 3.0. You size a carb based on the engine air flow demands. Airspeed through the carb is the game. Bigger is not always better.
__________________
Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
||
|
02-24-2006, 02:31 PM
|
|
|
Registered
Join Date: Jan 2004
Location: CT
Posts: 11,538
|
A high performance 3.0 with twin plugs and racy cam wants 46mm carbs.
__________________
Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
||
|
02-24-2006, 02:41 PM
|
|
|
Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
|
As Tom said, those are FAR too big for a 3.0 of any kind,....
 46's would be just perfect and they can be configured for any state of tune.
__________________
Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
||
|
02-24-2006, 02:51 PM
|
|
|
Formerly bb80sc
Join Date: Aug 2001
Location: Hollywood Beach, CA
Posts: 4,361
|
Thanks guys. A dood has them for sale on ebay, 1995.00 buy it now, IIRC.
cheers -Brad
__________________
Cheers -Brad 2015 Cayman GTS 2015 4Runner Limited |
||
|
02-24-2006, 07:05 PM
|
|
|
|
RETIRED
|
you would do better to have two porcelain toilets with a midget pouring in gas....%^B
WAY TOO FARGIN BIG DUDE..... Why don't ya get a 3.6 so you can be a long hood with balls...like me....
__________________
1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
||
|
02-24-2006, 07:34 PM
|
|
|
Formerly bb80sc
Join Date: Aug 2001
Location: Hollywood Beach, CA
Posts: 4,361
|
Quote:
Cuz I'd always be in your shadow......my balls will never be as big as yours Besides, I already blew my wad on the car, so I gotta stay cheap (relative) on the motor for now....
__________________
Cheers -Brad 2015 Cayman GTS 2015 4Runner Limited |
||
|
02-24-2006, 08:09 PM
|
|
|
RETIRED
|
Yeah...they DO drag on the ground...just like my knuckles....
__________________
1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
||
|
02-25-2006, 04:16 AM
|
|
|
Registered
Join Date: Jan 2006
Location: Sun Valley Idaho
Posts: 91
|
Too much CFM is not always a good thing. When you switch to carbs and go to bigger CFM. If you don't change your cam grind you engine will loose some of the 'quick' in acceleration. You get more high end horse power but boogs donw of the line. Every Chevrolet engine builder knows that.
__________________
More is better and too much is JUST enough |
||
|
02-25-2006, 08:45 AM
|
|
|
Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
|
funny to me.
I just searched my name and Chevy. I found over 20 different thread topics where I dropped the name Chevy.
__________________
Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
||
|
02-25-2006, 04:26 PM
|
|
1987 Porsche 911 Targa 3.2
Da cab
