early 12a power and other ???'s
01-01-08, 11:09 AM
#27
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have you boughten a 12a yet or are you still trying to find one? which one is it? how many miles does the said engine have. and it CB performance not racing. which trans axle do you have? do you have the adapter plate yet? and all you need to get 120 hp out of a 12a is barely anything just by the engine and maybe swap the carb. your going to have a hard time with the throttle linkage but id just buy one that is for say a sand rail thats just longer than normal. and run some kind of sleeve over it so you can "turn it" so that it matches up with the carb you chose. i almost did a similar swap my self a few guys on here have done it. but they used 13b's go look on youtube youll find quite a few old bugs running them.
2.looking to buy a 6 rib bus trans.
3.no no adapter plate.
4.I havent go the bug yet either I am going to trade a guy the bug for a rail project that i have and he lives way down state.
what did you want to know all this stuf for?
01-01-08, 01:46 PM
#29
Do a baja. At your level of knowledge, a baja will be far easier to rotarize than a street bug because you need to make room for the radiator. Where would you install a rad in a street bug? How would you install it? How would you run the coolant pipes? Where? See what I mean?
I'm doing a baja. Keeping the radiator in the back (it will work, you'll see). The engine is a 4 port 13B that was originally carbed from the factory. I'll some day get a Sterling Nikki because according to Steve84GS on this forum, his 4 port 13B made 170HP at 7k with nothing more than a direct ifre ignition system and a decent flowing exhaust. Since I plan to do the same, I can expect somewhere around there. For now during break-in, I'll just use a stock 13B Hitachi carb and maybe try a modded Nikki at some point to compare the results. I know the Sterling carb will perform better than either of my carbs because he enlarges the primary venturis to 24mm compared to 20mm of stock carbs.
If all you're looking for is being able to do some dorky donuts in a parking lot, it will take you years and thousands of dollars. Since I already have an RX-7 for all that parking lot stuff, I can focus on building an awesome baja that will do dorky donuts in dirt without breaking the bank. As for the time frame, I pulled the 1600 a little over two weeks ago, pulled the bug tranny last week, got the 3 rib bus tranny in last night and pulled the 4 port 13B earlier in the day. I'll spend today prepping it for the baja install. Gotta swap the waterpump, pullies, flywheel to rear counterweight, and start modding the intake manifold for the Nikki stud pattern.
I'm doing a baja. Keeping the radiator in the back (it will work, you'll see). The engine is a 4 port 13B that was originally carbed from the factory. I'll some day get a Sterling Nikki because according to Steve84GS on this forum, his 4 port 13B made 170HP at 7k with nothing more than a direct ifre ignition system and a decent flowing exhaust. Since I plan to do the same, I can expect somewhere around there. For now during break-in, I'll just use a stock 13B Hitachi carb and maybe try a modded Nikki at some point to compare the results. I know the Sterling carb will perform better than either of my carbs because he enlarges the primary venturis to 24mm compared to 20mm of stock carbs.
If all you're looking for is being able to do some dorky donuts in a parking lot, it will take you years and thousands of dollars. Since I already have an RX-7 for all that parking lot stuff, I can focus on building an awesome baja that will do dorky donuts in dirt without breaking the bank. As for the time frame, I pulled the 1600 a little over two weeks ago, pulled the bug tranny last week, got the 3 rib bus tranny in last night and pulled the 4 port 13B earlier in the day. I'll spend today prepping it for the baja install. Gotta swap the waterpump, pullies, flywheel to rear counterweight, and start modding the intake manifold for the Nikki stud pattern.
01-01-08, 02:18 PM
#30
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Where would you install a rad in a street bug? How would you install it? How would you run the coolant pipes? Where? See what I mean?
behind the hood.
at an angle.
flexible coolant pipes are made.
back to #1
NO.
no i am just playin I have a s10 right now that has a 350 v8 in it but I realy want to sell it becuase it gets little to no mpg, so I realy like the baja look but i want a good street driver.
behind the hood.
at an angle.
flexible coolant pipes are made.
back to #1
NO.
no i am just playin I have a s10 right now that has a 350 v8 in it but I realy want to sell it becuase it gets little to no mpg, so I realy like the baja look but i want a good street driver.
01-01-08, 08:16 PM
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the reason i want to know is i'm trying to guage what kind of build you are doing and trying to see how far you have thought it out. i did know of a place that had adapter plates so that the engine would bolt right up. i had found them when i was thinking about doing an ej20 or ej25 swap into the bug. i cant remember where i found this guy that swapped that into his notch back. looked sick and fun wanted to try it but i bought the rx7 instead.
01-01-08, 08:44 PM
#34
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Sounds like you have a lot of reading to do. Start with the FAQs in the sticky thread at the top of the page. Then move on to the archives. These sorts of questions have been covered to death and it doesn't seem like you really have a grasp of basic rotary knowledge.
If you're looking for gas mileage, a rotary isn't exactly the greatest place to start. I never got better than 16 MPG around town with my mild-ported 12A, though I'm sure it could have been tuned better.
Don't bother with early 12As, their reliability improved drastically in '79. All you need is a good-flowing exhaust and carb and you can hit 120 WHP with ease.
If you're looking for gas mileage, a rotary isn't exactly the greatest place to start. I never got better than 16 MPG around town with my mild-ported 12A, though I'm sure it could have been tuned better.
Don't bother with early 12As, their reliability improved drastically in '79. All you need is a good-flowing exhaust and carb and you can hit 120 WHP with ease.
01-01-08, 09:59 PM
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Sounds like you have a lot of reading to do. Start with the FAQs in the sticky thread at the top of the page. Then move on to the archives. These sorts of questions have been covered to death and it doesn't seem like you really have a grasp of basic rotary knowledge.
If you're looking for gas mileage, a rotary isn't exactly the greatest place to start. I never got better than 16 MPG around town with my mild-ported 12A, though I'm sure it could have been tuned better.
Don't bother with early 12As, their reliability improved drastically in '79. All you need is a good-flowing exhaust and carb and you can hit 120 WHP with ease.
If you're looking for gas mileage, a rotary isn't exactly the greatest place to start. I never got better than 16 MPG around town with my mild-ported 12A, though I'm sure it could have been tuned better.
Don't bother with early 12As, their reliability improved drastically in '79. All you need is a good-flowing exhaust and carb and you can hit 120 WHP with ease.
01-02-08, 11:02 AM
#36
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kennedy engineering is were you can get adaptor plates. I realy dont know much about these engines, but i like working on cars and would like to learn. as for mpg, i am just looking for decent mpg, double digits would be nice. I drive a s10 with a 350 v8 in it and it gets 6 mpg everywhere.
01-02-08, 05:19 PM
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01-03-08, 06:03 PM
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hey I have found a couple of motors and have the choice One is a 4 port 13b and the other is a 12a they are both 100$ and they both need rebuilt.
So my questions are which one is easier to build?
Which is more reliable, last longer?
Which is cheaper to build power on?
thanks again guys
So my questions are which one is easier to build?
Which is more reliable, last longer?
Which is cheaper to build power on?
thanks again guys
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