The 13B NA Power Thread. - Page 2

Fidelity101 · 12-11-2008, 07:22 PM

well I already got an FC and I prefer the body style over the FB so not that much of a loss

Whizbang · 12-12-2008, 12:18 PM

Started to pull the motor from the Turbo II last night, hope to get it out of the car completely tomorrow, then break it down this upcoming week sometime and see what i have going on inside.

Already have two good housings lined up though.

Whizbang · 12-17-2008, 03:11 PM

i have heard conflicting info on 1/2 bridges and streetports regarding them being essentially the same in power output in a naturally aspirated situation. Any one have more info on this.

drewski86 · 12-17-2008, 05:05 PM

They are very similar as far as power output in N/A applications, but you still get the poor drivability with the half bridge. If you plan on going half bridge, you might as well go full bridge. If you have the resources you might as well go PP instead of full bridge. PP will make more power and actually be milder down low as bridge ports usually have more overlap. Once you get into high overlap ports, free flowing exhaust becomes VERY important. Power falls off hard as you try to muffle it and there will come a point where a streetport will make more power at the same db level.

Whizbang · 12-18-2008, 08:35 PM

PP is actually in the line up for the next engine i build unless i start feeling spunky and just opt to do it with this one. Might try to kill the some 6PI irons then if i am going that route. I know people opt for the four ports because there is less port to fill. Or maybe ill try the racing beat aluminum end plates?

JunpoweR · 01-25-2009, 11:44 PM

Quote:

Originally Posted by Low Impedance

racing beat aluminum end plates?

Balla!

Whizbang · 01-28-2009, 09:00 PM

well i think im going to try to still put an NA motor into the turbo II to get her running til i can do something else with it. But i want to make something i can transfer to a first gen chassis down the road. SO once i get done with tech school and have some funds, ill start to be able to play.

Whizbang · 02-20-2009, 03:00 AM

so does anyone have any interest in seeing what kind of max power people can pull. Maybe do a contest and the top person gets a interview section in the digizine or something. Not to be like the other thread on Rx7club, but i think its a great concept. I would love to see something similar for the 12a as well. Probably limit it to street porting.

Max777 · 02-22-2009, 02:54 AM

i have always wanted to see what a 4 port N/A with ITB's and a MOTEC could do, I bet it could do lots with the right tuner and engine builder, but it seems like one one worth while, like judge ito, or Racing beat, or mazdatrix has tried the setup with their professional experience, or at least not documented publicly.

nissanconvert · 02-22-2009, 03:40 PM

Quote:

Originally Posted by Max777

i have always wanted to see what a 4 port N/A with ITB's and a MOTEC could do, I bet it could do lots with the right tuner and engine builder, but it seems like one one worth while, like judge ito, or Racing beat, or mazdatrix has tried the setup with their professional experience, or at least not documented publicly.

Try to source some variable length runners too. Drive them on an RPM output. You'd have to spend hours on a dyno but the results could be impressive.

Whizbang · 02-22-2009, 04:59 PM

does anyone actually produce such an item? I mean i have ideas how i would make something work for a naturally aspirated engine but i lack some of the tools needed to make one.

nissanconvert · 02-22-2009, 10:09 PM

Quote:

Originally Posted by Low Impedance

does anyone actually produce such an item? I mean i have ideas how i would make something work for a naturally aspirated engine but i lack some of the tools needed to make one.

well, the honda kids source their itbs from motorcycles. I know the R1 has variable length runners, but i'm not sure how much.

This video of the 787b shows the runners operating @ about 4:50

B.Purdy · 02-22-2009, 05:09 PM

Hey my name is Bennett,
I'm looking for an electric fuel pump for a 86' RX7 13 B.
If anyone has any information about this I would really appreciate it.
Thanks!
Ben

Whizbang · 02-22-2009, 11:40 PM

well the MS site has a good thread of throttle bodies from motorcycles. Maybe ill pick something up off ebay and see what the deal is

http://www.msefi.com/viewtopic.php?f=29&t=6627

Whizbang · 03-02-2009, 11:03 PM

well i am in motion on my project.

13B s4 stock port as the base for now.
going to run an MS unit and a 12a dizzy.

Ill get some baseline info here soon once parts come in and i get the motor running.

What i am curious about is what i can do to the dizzy to make some more power? What is way to go with the split timing? Any other advice?

12-11-2008, 07:22 PM	#1
Fidelity101 Reliable Source Join Date: Nov 2008 Location: Michigan/Illinois Posts: 336 Rep Power: 17	well I already got an FC and I prefer the body style over the FB so not that much of a loss __________________ My Rx-7 Vids

12-12-2008, 12:18 PM	#2
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	Started to pull the motor from the Turbo II last night, hope to get it out of the car completely tomorrow, then break it down this upcoming week sometime and see what i have going on inside. Already have two good housings lined up though. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

12-17-2008, 03:11 PM	#3
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	i have heard conflicting info on 1/2 bridges and streetports regarding them being essentially the same in power output in a naturally aspirated situation. Any one have more info on this. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

12-18-2008, 08:35 PM	#5
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	PP is actually in the line up for the next engine i build unless i start feeling spunky and just opt to do it with this one. Might try to kill the some 6PI irons then if i am going that route. I know people opt for the four ports because there is less port to fill. Or maybe ill try the racing beat aluminum end plates? __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

01-28-2009, 09:00 PM	#7
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	well i think im going to try to still put an NA motor into the turbo II to get her running til i can do something else with it. But i want to make something i can transfer to a first gen chassis down the road. SO once i get done with tech school and have some funds, ill start to be able to play. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

12-17-2008, 05:05 PM	#4
drewski86 Slow Join Date: Jun 2008 Posts: 38 Rep Power: 0	They are very similar as far as power output in N/A applications, but you still get the poor drivability with the half bridge. If you plan on going half bridge, you might as well go full bridge. If you have the resources you might as well go PP instead of full bridge. PP will make more power and actually be milder down low as bridge ports usually have more overlap. Once you get into high overlap ports, free flowing exhaust becomes VERY important. Power falls off hard as you try to muffle it and there will come a point where a streetport will make more power at the same db level.

02-20-2009, 03:00 AM	#8
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	so does anyone have any interest in seeing what kind of max power people can pull. Maybe do a contest and the top person gets a interview section in the digizine or something. Not to be like the other thread on Rx7club, but i think its a great concept. I would love to see something similar for the 12a as well. Probably limit it to street porting. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

02-22-2009, 02:54 AM	#9
Max777 Pirate Join Date: Mar 2008 Location: Central IL Posts: 1,323 Rep Power: 19	i have always wanted to see what a 4 port N/A with ITB's and a MOTEC could do, I bet it could do lots with the right tuner and engine builder, but it seems like one one worth while, like judge ito, or Racing beat, or mazdatrix has tried the setup with their professional experience, or at least not documented publicly. __________________ Rotaries:They are NOT that complicated!

02-22-2009, 04:59 PM	#11
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	does anyone actually produce such an item? I mean i have ideas how i would make something work for a naturally aspirated engine but i lack some of the tools needed to make one. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

02-22-2009, 05:09 PM	#13
B.Purdy The Newbie Join Date: Feb 2009 Posts: 1 Rep Power: 0	Fuel Pump Hey my name is Bennett, I'm looking for an electric fuel pump for a 86' RX7 13 B. If anyone has any information about this I would really appreciate it. Thanks! Ben

02-22-2009, 11:40 PM	#14
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	well the MS site has a good thread of throttle bodies from motorcycles. Maybe ill pick something up off ebay and see what the deal is http://www.msefi.com/viewtopic.php?f=29&t=6627 __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

03-02-2009, 11:03 PM	#15
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	well i am in motion on my project. 13B s4 stock port as the base for now. going to run an MS unit and a 12a dizzy. Ill get some baseline info here soon once parts come in and i get the motor running. What i am curious about is what i can do to the dizzy to make some more power? What is way to go with the split timing? Any other advice? __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode