13b-msp motor in a FB with 2nd gen EFI
#1
13b-msp motor in a FB with 2nd gen EFI
Back in the First gen game and it been years. I picked up a GSLSE that someone had modded back in the days and then started taken it apart. It had a carb on it and that is long gone. Motor seems oky and has decent compression 80ish I believe. Anyways I have a rx8 and was checking CL and found a smoking deal a completed rx8 motor with wiring ecu and pedals. The rx8 computer requires way to much to run properly in another car. I really picked it up as a spare for my 8 but I have be pondering about slamming it into a first gen just to have something different. Racing beat makes an intake adapter that allows you to bolt a 6 port 2nd gen manifold on the motor. Its really designed for a carb set up but the stock fuel injection should also fit.
Rx8 6 port short block
GSLSE front cover and dizzy with drive gear
2nd gen water pump??????
auto rx8 counter weight
light flywheel ??????
GSLSE stock trans
So what you guys think go EFI with electronics from a s4, s5, or something else or Carb(Weber or Holley)
Rx8 6 port short block
GSLSE front cover and dizzy with drive gear
2nd gen water pump??????
auto rx8 counter weight
light flywheel ??????
GSLSE stock trans
So what you guys think go EFI with electronics from a s4, s5, or something else or Carb(Weber or Holley)
#2
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,780
Received 2,565 Likes
on
1,824 Posts
interesting, its possible. i think i would use the Rx8 intakes, as they are better. the Rx7 injectors would drop right in, if you used the S5 ecu, it would run the VDI, and could possibly run the 6pi, although its solenoid output to motor, so something needs to be done there.
that all being said, not sure that the timing or fuel is right for a 230hp engine
that all being said, not sure that the timing or fuel is right for a 230hp engine
#5
carb whisperer
I actually mocked a mani for 2 nikkis up this summer. The linkage would be complicated, and they take up a lot of room. Also, just the carb is 5 and 3/4 high, so fabbing an air cleaner to feed both of them is a tight squeeze in the FB. Especially if you have a strut tower bar like I did when I was playing with the cardboard mock ups.
#6
HeyHeyHey..Its the Goose
iTrader: (3)
I actually mocked a mani for 2 nikkis up this summer. The linkage would be complicated, and they take up a lot of room. Also, just the carb is 5 and 3/4 high, so fabbing an air cleaner to feed both of them is a tight squeeze in the FB. Especially if you have a strut tower bar like I did when I was playing with the cardboard mock ups.
EDIT: If done, it would be a pure aesthetic thing... Hot rodish.
Last edited by Qingdao; 10-30-15 at 08:18 PM.
#7
'85 12a
iTrader: (10)
I actually mocked a mani for 2 nikkis up this summer. The linkage would be complicated, and they take up a lot of room. Also, just the carb is 5 and 3/4 high, so fabbing an air cleaner to feed both of them is a tight squeeze in the FB. Especially if you have a strut tower bar like I did when I was playing with the cardboard mock ups.
Trending Topics
#11
rotorhead
iTrader: (3)
If it's a series 1 renesis it has 6 injectors you would need to control. You also need to figure out the throttle and all the actuators. Renesis had electronic throttle with a single blade.
Renesis has a 5 stage induction system, with electronic throttle and independent control of secondary and aux ports. Then it had VDI and a variable length induction pipe to the airbox. It is Porsche or Ferrari level of complexity.
Renesis has a 5 stage induction system, with electronic throttle and independent control of secondary and aux ports. Then it had VDI and a variable length induction pipe to the airbox. It is Porsche or Ferrari level of complexity.
#12
rx8 info
If it's a series 1 renesis it has 6 injectors you would need to control. You also need to figure out the throttle and all the actuators. Renesis had electronic throttle with a single blade.
Renesis has a 5 stage induction system, with electronic throttle and independent control of secondary and aux ports. Then it had VDI and a variable length induction pipe to the airbox. It is Porsche or Ferrari level of complexity.
Renesis has a 5 stage induction system, with electronic throttle and independent control of secondary and aux ports. Then it had VDI and a variable length induction pipe to the airbox. It is Porsche or Ferrari level of complexity.
#13
Sharp Claws
iTrader: (30)
you could probably situate and fix the secondary port sleeves in the open position and create a delayed secondary butterfly for the secondaries based off an FC intake manifold if the adapter truly fits the MSP and adapts to an FC UIM.
aside from that, i really don't see why it wouldn't work. however i doubt you will even reach stock MSP power levels even with a free flowing exhaust system. mainly due to ECU tuning variables and the lacking tuned MSP HP intake. but is it worth it? if you can manage to tweak it to optimize the stock ECU via piggybacks or hacks, i do think so. just keep in mind, the MSP series 1 has the worst track record for longevity of any rotary since the early 70's, if you can rebuild it then that will eliminate costly overhauls if you plan to drive it alot or race it. even stock non abused cars wear out the rotor housings in less than 100k miles, granted i had a customer with an original 250k mile S1, i honestly have no clue how he got that lucky to have it go for so long.
aside from that, i really don't see why it wouldn't work. however i doubt you will even reach stock MSP power levels even with a free flowing exhaust system. mainly due to ECU tuning variables and the lacking tuned MSP HP intake. but is it worth it? if you can manage to tweak it to optimize the stock ECU via piggybacks or hacks, i do think so. just keep in mind, the MSP series 1 has the worst track record for longevity of any rotary since the early 70's, if you can rebuild it then that will eliminate costly overhauls if you plan to drive it alot or race it. even stock non abused cars wear out the rotor housings in less than 100k miles, granted i had a customer with an original 250k mile S1, i honestly have no clue how he got that lucky to have it go for so long.
Last edited by RotaryEvolution; 10-31-15 at 04:18 PM.
Thread
Thread Starter
Forum
Replies
Last Post
Megasquirt Fuel Pump not getting signal from MS3X.
spokanerxdude
Megasquirt Forum
31
07-24-16 09:57 AM