BP Carbed 12a
07-14-05, 11:00 PM
#1
BP Carbed 12a
i got a question for all of you with bridge ported carb'ed 12a. how hard is it to start your car, and what's your idle set at? i'm asking because i'm looking at buying a '83 with a BP 12a. The guy that is selling it had to keep the gas to the floor when starting it, and it wouldn't run below 1400 rpm, but it had the bride port "brap brap brap" idle, and he said that he's pretty sure that it's a MazdaTrix Bridge Port.
07-15-05, 04:37 PM
#4
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Shouldn't start hard- maybe the carb isn't modified right for a BP.
Idle should *** around 1100-1400, with a heavy lope (brap-brap).
And I wouldn't count on the BP as being a Mazdatrix. Maybe a Mazdatrix template.
Sounds like the intake is out of whack.
Keith
Idle should *** around 1100-1400, with a heavy lope (brap-brap).
And I wouldn't count on the BP as being a Mazdatrix. Maybe a Mazdatrix template.
Sounds like the intake is out of whack.
Keith
07-15-05, 06:22 PM
#6
My 12a full J bridge, cut into the water seal, starts right up. The fuel enrichment circuit on my Dellorto needs to be turned on when cold. Once warmed off I turn off the FEC.
Idles @ 1800rpms which is typical of that port. Less bridge, less overlap, less idle rpm.
A 50's Lincoln carb? What? God I hope it's at least a holley.
Idles @ 1800rpms which is typical of that port. Less bridge, less overlap, less idle rpm.
A 50's Lincoln carb? What? God I hope it's at least a holley.
07-15-05, 08:55 PM
#7
Originally Posted by DriveFast7
My 12a full J bridge, cut into the water seal, starts right up. The fuel enrichment circuit on my Dellorto needs to be turned on when cold. Once warmed off I turn off the FEC.
Idles @ 1800rpms which is typical of that port. Less bridge, less overlap, less idle rpm.
A 50's Lincoln carb? What? God I hope it's at least a holley.
Idles @ 1800rpms which is typical of that port. Less bridge, less overlap, less idle rpm.
A 50's Lincoln carb? What? God I hope it's at least a holley.
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07-16-05, 04:00 PM
#8
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Originally Posted by whitey85mtu
how do you modify the carb for a BP? he said that it's a holly off of a '50's licoln (the car is a huge hack job)
and why wouldn't it be a mazdatrix motor?
and why wouldn't it be a mazdatrix motor?
He'd be showing you a reciept if it was Mazdatrix motor, and if it was, It would most likely have an appropriate carb on it too, not one off a 50's lincoln. If he's too cheap to buy the right carb, he sure as hell wouldn't drop the money for a new Mazdatrix BP motor.
The engine might be fine, but the intake is most likely whats F'ing everything up.
Just my .02 cents.
07-16-05, 07:08 PM
#9
Originally Posted by Keith13b
Pretty much any carb that wasn't meant for a rotary will need extensive mods to run right (smooth) on a rotary. Hench why the carbs are so expensive from Mazdatrix and RB.
He'd be showing you a reciept if it was Mazdatrix motor, and if it was, It would most likely have an appropriate carb on it too, not one off a 50's lincoln. If he's too cheap to buy the right carb, he sure as hell wouldn't drop the money for a new Mazdatrix BP motor.
The engine might be fine, but the intake is most likely whats F'ing everything up.
Just my .02 cents.
He'd be showing you a reciept if it was Mazdatrix motor, and if it was, It would most likely have an appropriate carb on it too, not one off a 50's lincoln. If he's too cheap to buy the right carb, he sure as hell wouldn't drop the money for a new Mazdatrix BP motor.
The engine might be fine, but the intake is most likely whats F'ing everything up.
Just my .02 cents.
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