Version 3 NA 20b Start-Up

gmonsen · 04-26-2013, 08:40 PM

diabolical1... Ha-ha. Now, that's creative as hell. Thanks. This is literally the start up and I actually expect it will sound much better when we get it done. Just the sound of the ITB's sucking should add a bit...

riceracing... Logan Carswell at Defined Autoworks did the 3 plug conversion. I'm still running my Microtech Ltx12 with an outboard x6 Igniter added for the extra plugs. I'm running the leading and trailing 1's with no split. As to hp, I don't know, of course, until its on the dyno, but would guess 375+ to the wheels.

Most of the design changes I've made were intended to improve torque at lower rpm, including the dual path exhaust pipes and the secondary intake butterflies. I'm handicapped on max power, because I didn't want to dry sump the motor and go with ceramic seals. So, I have an 8500 rpm nominal redline. I think I could pull 400 if I ran to 9500 rpm. But, again, we'll just have to wait and see. Modified Magazine is covering a test & tune day at VIR on Monday, May 20th and in addition to track testing we'll have it on the dynos down there. We will have already done some pulls, but the motor should have close to 1500 miles on it by then and the numbers should be pretty stable.

We're also testing a stock FD, a modded twins FD, a 20b turbo and a 4 rotor NA. Should be very interesting to see how they all handle and what the lap times are.

G

hades · 04-26-2013, 09:50 PM

Is this going to be supercharged like your sig says?

gmonsen · 04-26-2013, 11:24 PM

Hades... No. Separate project and way behind on it. This motor is the 1st one in my sig. It runs three 55mm ITB's. The supercharger project is to build a similarly "linear" power delivery motor to my NA, but aiming for 500 whp instead of a bit below 400 on the NA motor. I also like the whine of a supercharger. However, I am no longer sure I want or need more power than what I have or will have in a few weeks.

G

gmonsen · 04-29-2013, 07:21 AM

Update... So, tomorrow we'll have the new intake and ITB's on. So, we'll get another start up by end of week with the completed motor and exhaust. Should be good.

G

04-26-2013, 08:40 PM	#1
gmonsen The Ancient One Join Date: Mar 2008 Location: Eastern Pennsylvania Posts: 144 Rep Power: 18	diabolical1... Ha-ha. Now, that's creative as hell. Thanks. This is literally the start up and I actually expect it will sound much better when we get it done. Just the sound of the ITB's sucking should add a bit... riceracing... Logan Carswell at Defined Autoworks did the 3 plug conversion. I'm still running my Microtech Ltx12 with an outboard x6 Igniter added for the extra plugs. I'm running the leading and trailing 1's with no split. As to hp, I don't know, of course, until its on the dyno, but would guess 375+ to the wheels. Most of the design changes I've made were intended to improve torque at lower rpm, including the dual path exhaust pipes and the secondary intake butterflies. I'm handicapped on max power, because I didn't want to dry sump the motor and go with ceramic seals. So, I have an 8500 rpm nominal redline. I think I could pull 400 if I ran to 9500 rpm. But, again, we'll just have to wait and see. Modified Magazine is covering a test & tune day at VIR on Monday, May 20th and in addition to track testing we'll have it on the dynos down there. We will have already done some pulls, but the motor should have close to 1500 miles on it by then and the numbers should be pretty stable. We're also testing a stock FD, a modded twins FD, a 20b turbo and a 4 rotor NA. Should be very interesting to see how they all handle and what the lap times are. G __________________ 1993 Rx7 R1 20b NA 1994 Rx7 20b supercharged project 1991 BMW 850 6 speed 1991 BMW E30 M3 Evo II Last edited by gmonsen; 04-26-2013 at 08:44 PM.

04-26-2013, 09:50 PM	#2
hades Rotary Fanatic Join Date: Mar 2008 Location: Freedom Land Posts: 316 Rep Power: 18	Is this going to be supercharged like your sig says? __________________ This is going to tear

04-26-2013, 11:24 PM	#3
gmonsen The Ancient One Join Date: Mar 2008 Location: Eastern Pennsylvania Posts: 144 Rep Power: 18	Hades... No. Separate project and way behind on it. This motor is the 1st one in my sig. It runs three 55mm ITB's. The supercharger project is to build a similarly "linear" power delivery motor to my NA, but aiming for 500 whp instead of a bit below 400 on the NA motor. I also like the whine of a supercharger. However, I am no longer sure I want or need more power than what I have or will have in a few weeks. G __________________ 1993 Rx7 R1 20b NA 1994 Rx7 20b supercharged project 1991 BMW 850 6 speed 1991 BMW E30 M3 Evo II

04-29-2013, 07:21 AM	#4
gmonsen The Ancient One Join Date: Mar 2008 Location: Eastern Pennsylvania Posts: 144 Rep Power: 18	Update... So, tomorrow we'll have the new intake and ITB's on. So, we'll get another start up by end of week with the completed motor and exhaust. Should be good. G __________________ 1993 Rx7 R1 20b NA 1994 Rx7 20b supercharged project 1991 BMW 850 6 speed 1991 BMW E30 M3 Evo II