fcdrifter13

I was thinking about doing a Pport project just for fun and on the cheap. I have access to a machine shop for all the milling that would need to be done.

I have a couple of 40mm Karadon carbs that I used to run on my 2500cc VW motor before I swapped to webbers. And seeing how 12As I can get for like 50$ or free, do you guys think that 2 40mm carbs would support a P-port 12a and make decent power.

Like I said it was just a thought on something to do for fun.

neektar

iTrader: (2)

Now way. You'll need waaaay more gas and air for a p-port. If Holley 650 is only good for a b-p. Imagine the size holley you need for a pp.

I'm pretty sure there are people running 40mm carbs on regular SP motors. I doubt 40mm is enough for a pp. Maybe 44mm+.

Edit: It does sound like a sweet set-up though. Good luck!

fcdrifter13

I didnt think dual 40s would be enough oh well.

84stock

iTrader: (5)

I don't think nectro realized you were gonna use a "pair" of them. http://forum.teamfc3s.org/showthread.php?t=51951

fcdrifter13

I probably didnt make myself clear like usual. They are Karadon 40mm and I have 2 that I will be using. Sorry if I was confusing.

trochoid

iTrader: (6)

12A p-ports need at least 51 m Idas, I have seen them with modded 62 mm ones.

blown7

I'm going to be using a 48 IDA on my 13B p-port with factory style cast manifold. Just going to machine the venturies out and hope for the best till i can boost the p-port.

Kim

What kind of power are you looking to get on your Pport motor, Street or all out racepower?

I just might try this idea with smaller ports to reduce the revs.
http://www.nopistons.com/forums/inde...howtopic=66523

broke7

iTrader: (1)

if your going that route i will save you the trouble and sell you a 13b set with a ida intake for 250 pm if intrested

FIBREMAZ

I run twin 50mm T.b's on both of my PP's. I would say they will give best response and overall power/drivabilty. 650 holley is only equivalent to one 50mm T.B's maximum flow or standard Nikki 13B carby

fcdrifter13

I was only shooting for like 180-190hp, mainly just wanna do this for ***** and giggles not to make huge HP numbers. I would like to keep it kinda streetable but i think that is different to every person.

speedturn

iTrader: (1)

180 hp could be obtained without resorting to a PP
I have been racing a PP motor since 1997, and have driven it on the street several hours, and it is very unpleasant in traffic - not streetable.
I have had street ported engines for daily street driving since 1990 - and they are streetable. That is why they call it a street port.

The intake manifold to adapt a pair of 2 barrel carbs down to two PP ports will not be very pretty or efficient. It is hard to beat the flow efficiency of one throttle, one runner, feeding one port.

fcdrifter13

Like i said I am just wanting to do this for ***** and giggles, max power is not needed, its just one of those things I have got to have, like 2 fds one with a 20b and one with and ls7.

The largest size I can get the Karadons reworked to is 48mm. Here is a link to some info on the carbs i will be using http://www.lowbugget.com/Kadron_carb_page.html just a pair of single barrels. I am wanting to make some small adapters for when I cut my port so I can mount them directly ontop of each port. So it would be one 48mm carb for each portwith about a 2in"manifold" that would keep the carb level and not at an angle.

PercentSevenC

Just keep the port timing conservative and you could get it fairly streetable.

fcdrifter13

But I want a 2in port with a huge over lap.

Kim

With a 2" port there wont be alot of housing holding the apex seal.
If it gets too unsupported the metal seals will flex and wear.

FIBREMAZ

Around 52mm is the biggest you really want to go. I have 45mm and 48mm PP's, let me tell you 48mm is big enough. Oh and I do drive mine on the street regularly

blown7

hey beef is your 48 on a 13b of 12a

FIBREMAZ

13B. I forgot we were talking about 12A PP's. 52mm port in12A housing might be pushing it

fcdrifter13

I forgot the teal for sarcasim(sp)

PercentSevenC

Heh. I was mostly responding to speedturn's suggestion that Pports aren't streetable.

fcdrifter13

lol I hope it will be. Like i said its the only port I havnt had so it should be kinda different. And if it works well it may end up being the cheapest way to go P-port mainly because you can pick up used Karadons for like 200$ and I could make the manifolds for cheap so who knows where this will go.

Kim

I'll let you off with a forum bitchslap

Dont let it happen again...

fcdrifter13

But maybe i like being slapped around lol

But in all seriousness whats the smallest port opening and overlap can you have to maintain a streetable p-port.

Kim

Ehh Go Fish...

I will try the small peripheral port 12A, going with 36-40mm.
Just gotta figure out when i want it to open close.