Which grade gas for street port?
My 84 12a has a mild street port. I was wondering what grade gasoline I should use. It has a Holley red fuel pump and I only get about 12mpg. I've researched and a street port shouldn't affect mpg. So is it the pump? Sorry if these are obvious questions I'm new to rotaries. Thanks in advance.
|
welcome to the board. :)
you will be fine running 87. porting will affect MPG, but how much will depend on a few factors. you mentioned the pump, but you did not mention which carburetor you're running. that matters more. |
Originally Posted by diabolical1
(Post 11797771)
welcome to the board. :)
you will be fine running 87. porting will affect MPG, but how much will depend on a few factors. you mentioned the pump, but you did not mention which carburetor you're running. that matters more. |
it's not likely to be the pump. with my Carter on a tired, stock 13B (with Dell'Orto and all 6 ports open all the time), i was getting 24 MPG. withe the same Carter on the streetport 12A (with Nikki) that followed it, i was getting roughly the same. my brother's car, with a streetport 13B and Holley pump would get roughly 20 MPG.
you should look to getting a fresh tuneup and then go from there. out of curiosity, what exhaust system do you have and what plugs do you run? |
Originally Posted by diabolical1
(Post 11797931)
it's not likely to be the pump. with my Carter on a tired, stock 13B (with Dell'Orto and all 6 ports open all the time), i was getting 24 MPG. withe the same Carter on the streetport 12A (with Nikki) that followed it, i was getting roughly the same. my brother's car, with a streetport 13B and Holley pump would get roughly 20 MPG.
you should look to getting a fresh tuneup and then go from there. out of curiosity, what exhaust system do you have and what plugs do you run? |
well, assuming it's in good shape, clean the carburetor and start trying to adjust it.
|
Originally Posted by diabolical1
(Post 11797960)
well, assuming it's in good shape, clean the carburetor and start trying to adjust it.
|
I was getting bad mpg's and checked my plugs they had build up on them so I changed them and it made a HUGE difference. I was getting a lot of back firing on decel now it's a lot better. Wouldn't hurt to check them even if it was just tuned up. Unless u changed them u don't know for sure
|
Originally Posted by fc3sjmh509
(Post 11798417)
I was getting bad mpg's and checked my plugs they had build up on them so I changed them and it made a HUGE difference. I was getting a lot of back firing on decel now it's a lot better. Wouldn't hurt to check them even if it was just tuned up. Unless u changed them u don't know for sure
|
Originally Posted by Tylerx7fb
(Post 11797938)
I'm not sure which plugs it has. Hopefully ngk. Is there anyway to check?
|
I filled up my tank last night and I got 14 mpg this time. It is my first car and manual so I guess I just got better at controlling torque. However I will still check the plugs today and clean the carb sometime.
|
All times are GMT -5. The time now is 04:22 PM. |
© 2024 MH Sub I, LLC dba Internet Brands