Stock port Vs. Mild Street port
#1
Stock port Vs. Mild Street port
Well here comes the concerns about gas mileage...
I have a set of virgin housings, I am thinking about rebuilding my motor with the stock ports. It currently has a street port, and I am going to drive it for awhile, not so much concerned with performance as I am about mileage. I am getting 18 Vs. the 25 I think I could be getting.. Besides, I cant really hear it as much as I think I should so I dont know if it is really adding anything... I am not concerned with the amount of hassle involved. I have a rebuild kit -Apex seals and -side seals -corner seals etc. So its now or never....
I did a G-Tech and got 195 hp, I am guesstimating I have 180-190 at the wheels, which would be close to what it should have according to what it makes at the flywheel. So I figure I should expect a twenty hp drop or so? I have re-jetted the carb and pulled about 1 mpg out of that.... This is temporary, I dont even know if I will do it. But like I said, I just dont hear it, maybe its just me.
Trust me though, the mileage is worth the rebuild. With as much driving as I am going to be doing, a fresh motor would be great. And I have big plans for a 13BT swap, and unlike many plans, that one WILL reach fruition.
J/W And if anyone has a good vid or sound lip of a street-ported rotary, LET ME KNOW!!! I have only heard one, mine, thats it. I was listening to Steves 7 and it sounds like mine... well any advise is much appreciated, call me an idiot if you must, but I dont think well under pressure....
Chris
I have a set of virgin housings, I am thinking about rebuilding my motor with the stock ports. It currently has a street port, and I am going to drive it for awhile, not so much concerned with performance as I am about mileage. I am getting 18 Vs. the 25 I think I could be getting.. Besides, I cant really hear it as much as I think I should so I dont know if it is really adding anything... I am not concerned with the amount of hassle involved. I have a rebuild kit -Apex seals and -side seals -corner seals etc. So its now or never....
I did a G-Tech and got 195 hp, I am guesstimating I have 180-190 at the wheels, which would be close to what it should have according to what it makes at the flywheel. So I figure I should expect a twenty hp drop or so? I have re-jetted the carb and pulled about 1 mpg out of that.... This is temporary, I dont even know if I will do it. But like I said, I just dont hear it, maybe its just me.
Trust me though, the mileage is worth the rebuild. With as much driving as I am going to be doing, a fresh motor would be great. And I have big plans for a 13BT swap, and unlike many plans, that one WILL reach fruition.
J/W And if anyone has a good vid or sound lip of a street-ported rotary, LET ME KNOW!!! I have only heard one, mine, thats it. I was listening to Steves 7 and it sounds like mine... well any advise is much appreciated, call me an idiot if you must, but I dont think well under pressure....
Chris
#2
Moderator
iTrader: (2)
this one is mine. its a '74 model 13b 4 port with streetport and the complete exhaust system from RB for the streetport. i've posted it before in the vid section but maybe u haven't seen it. http://www.youtube.com/watch?v=0SQtwyL8cPc
#4
Thunder from downunder
iTrader: (1)
Chris you live in a city, I doubt you'll ever get a constant 25, I get 23/24 all highway driving at 58 mph, that would drop a lot if I was in town. I've always heard that a street port will improve efficiency during regular street driving. My Mikuni and exhaust helped marginally.