85rx12a

how can you tell if a 12a is ported mild wild and bridged.

also what size is the carburators air cleaner mating service.

blwfly

iTrader: (4)

to tell exsactly would be to tear the engine down

85rx12a

damn iwas hpping for a simpler way i know the bridge has a certain sound the brum brum brum at least thats what i always hear on the videos. is there someway to tell if it is just not a stock port at all?

blwfly

iTrader: (4)

take the intake manifold off and exhaust you can see if its been port polished i guess usally the iron ports look grey

85rx12a

ill check tomorrow im getting a new intake and exhaust gasket in the morn. ive been driving the car for a while and i met a few guys out here in odessa that have some very nice 7s we lined them up and i almost litteraly blew their doors off. just got me to wandering what the PO may have done to this thing.

trochoid

iTrader: (6)

Pull the intake. You can feel if it's been smoothed and if it's a bridge with you finger. Same thing with exhzust porting, but it helps to have a stock exhaust port to compare too.

Latin270

Yup that will give you a clue if its ported but the only true way of knowing is to open her up.

diabolical1

iTrader: (3)

+2

85rx12a

well ive pulled the intake and it is awfully smooth, almost like it is plated but the engine doesnt have any mechanical problems so a teardown is out of the question. ill try to post some pics when i can get some that are nice and clear, the batt on my digi cam is fried i think, so its taking pretty crappy pics.

thanks for the help guys.

REVHED

Ported engines will pull less vacuum at idle.

85rx12a

well im almost completly convinced it is ported when i get the carb back on and half tuned ill pull a vac check and post my results

81WideMariah

iTrader: (8)

just for thought... if you're not sure of the porting, and not to the point of a rebuild then I'd HIGHLY recomend a wideband for tunning that carb. If you've got a large streetport and tune the carb for a stockport and run it hard in the texas heat, there's a good chance you can pop the engine from running too lean..... wideband=cheap insurance