MAZDA GT cars

vincentrx7 · 07-04-2009, 06:06 PM

Are all the Mazda GT cars that you see running against the Porsche's and GTO's all NA 20b's? I've been trying to find out anout the engines but haven't found much info. If so, where are they getting their parts and engines?

KaiFD3S · 07-06-2009, 06:37 PM

As far as I know they are all P-Port N/A 20B's...

Smokey · 07-08-2009, 12:52 PM

they don't release much info on them, but they were nice enough to let me take a good peek under the hood when they were up at Mid-Ohio.

They're definitely PP motors, using 13b housings.

Phoenix7 · 07-08-2009, 01:02 PM

now, are they renesis 20Bs? Are they older 13Bs? Try looking at the rules for the GT classes....I'm sure they say what you can and can't use....

Drama · 07-08-2009, 01:54 PM

older 20B`s

Phoenix7 · 07-08-2009, 01:59 PM

they are using Cosmo 20Bs then....I know Phil did an interview with Speedsource but you have to talk to him about it.

***Herblenny*** · 07-08-2009, 02:00 PM

I talked to the Speed Source guys last year about these engines.. They are not Renesis 20Bs and I don't remember if it was peripheral or not..

What I do remember is that the engine sits REALLY Low.. Let me see if I have a picture..

I asked them who built the engine and they told me that they did.. And I'm almost certain its base platform is the Cosmo 20B.

vincentrx7 · 07-08-2009, 07:46 PM

I just wonder where they get parts like center plates and e shafts. Wouldn't they be underpowered compared to the Porsche's and V8 domestics like the GTO? I thought they were in the same class.

Smokey · 07-09-2009, 07:28 AM

they're definitely not down on power compared to the others in their classes.

They're tube frame cars, so as Phil mentioned they were able to place the motor wherever they wanted. (low and back). In the instance of the Speed Source car that Phil posted, you can see it's so low that they moved the adjustable sway bar to go over the engine instead of below.

I could get close enough to see that the motors are definitely PP, and are using rotor housings stamped with 13b, and they're using the 20b thick iron. The intake setups on the other Rx8 teams were almost exactly the same, so either the rules are pretty to the letter on that, or Speed Source is building and providing motors for the other Mazda teams....not sure on that one.

dregg100 · 07-09-2009, 01:21 PM

yeah, they are all pp. and no, deffinately not down on power. a p-port 20b makes around 500bhp.

gmonsen · 07-23-2009, 12:14 PM

The motors are Cosmo 20b's with thick irons, P-Ports, and are NA motors making 475-500 whp. The motors up to at least mid last year were made by Roger Mandeville.

Gordon

dregg100 · 07-24-2009, 12:45 AM

dont you love it when "the man" is right down the street from you?

Chibana · 07-24-2009, 11:44 AM

I believe that I heard on Speed coverage or read somewhere that the SpeedSource 20b engines make 415 hp.

Indeed. Here is the URL:

http://www.speedsourceinc.com/index....&section=mazda

(I *love* watching these things go around the track, spitting flame when they downshift just before the apexes.)

dregg100 · 07-25-2009, 12:00 AM

of course they are going to say less than actual^^

j9fd3s · 08-03-2009, 01:57 PM

Quote:

Originally Posted by dregg100

of course they are going to say less than actual^^

in this class they are restricted to a lower rpm, like 7500 or something, so 415 is about right.

the black one at sevenstock last year looked like a cosmo 20b with RB style PP housings.

07-04-2009, 06:06 PM	#1
vincentrx7 20b FD Join Date: Apr 2008 iTrader: (0) Posts: 105 Rep Power: 17	MAZDA GT cars - What engine? Are all the Mazda GT cars that you see running against the Porsche's and GTO's all NA 20b's? I've been trying to find out anout the engines but haven't found much info. If so, where are they getting their parts and engines? __________________ Bobby '93 20b RX-7

07-08-2009, 12:52 PM	#3
Smokey Long Time Onlooker Join Date: Mar 2008 Location: Columbus, Ohio iTrader: (1) Posts: 31 Rep Power: 0	they don't release much info on them, but they were nice enough to let me take a good peek under the hood when they were up at Mid-Ohio. They're definitely PP motors, using 13b housings. __________________ 93 Touring - AD coilovers, BBK, full exhaust, PFS SMIC, PFC

07-08-2009, 07:46 PM	#8
vincentrx7 20b FD Join Date: Apr 2008 iTrader: (0) Posts: 105 Rep Power: 17	I just wonder where they get parts like center plates and e shafts. Wouldn't they be underpowered compared to the Porsche's and V8 domestics like the GTO? I thought they were in the same class. __________________ Bobby '93 20b RX-7

07-09-2009, 07:28 AM	#9
Smokey Long Time Onlooker Join Date: Mar 2008 Location: Columbus, Ohio iTrader: (1) Posts: 31 Rep Power: 0	they're definitely not down on power compared to the others in their classes. They're tube frame cars, so as Phil mentioned they were able to place the motor wherever they wanted. (low and back). In the instance of the Speed Source car that Phil posted, you can see it's so low that they moved the adjustable sway bar to go over the engine instead of below. I could get close enough to see that the motors are definitely PP, and are using rotor housings stamped with 13b, and they're using the 20b thick iron. The intake setups on the other Rx8 teams were almost exactly the same, so either the rules are pretty to the letter on that, or Speed Source is building and providing motors for the other Mazda teams....not sure on that one. __________________ 93 Touring - AD coilovers, BBK, full exhaust, PFS SMIC, PFC

07-09-2009, 01:21 PM	#10
dregg100 Rotary Fanatic Join Date: Feb 2008 iTrader: (2) Posts: 432 Rep Power: 17	yeah, they are all pp. and no, deffinately not down on power. a p-port 20b makes around 500bhp. __________________ '93 SSM Touring-S475... '87 Tii-LS1/T56

07-06-2009, 06:37 PM	#2
KaiFD3S Rotary Fanatic Join Date: Mar 2008 iTrader: (0) Posts: 437 Rep Power: 17	As far as I know they are all P-Port N/A 20B's...

07-08-2009, 01:54 PM	#5
Drama Rotary Fanatic Join Date: Feb 2008 Location: Richmond,Ky iTrader: (5) Posts: 227 Rep Power: 17	older 20B`s

07-23-2009, 12:14 PM	#11
gmonsen The Ancient One Join Date: Mar 2008 Location: Eastern Pennsylvania iTrader: (0) Posts: 144 Rep Power: 17	The motors are Cosmo 20b's with thick irons, P-Ports, and are NA motors making 475-500 whp. The motors up to at least mid last year were made by Roger Mandeville. Gordon __________________ 1993 Rx7 R1 20b NA 1994 Rx7 20b supercharged project 1991 BMW 850 6 speed 1991 BMW E30 M3 Evo II

07-24-2009, 12:45 AM	#12
dregg100 Rotary Fanatic Join Date: Feb 2008 iTrader: (2) Posts: 432 Rep Power: 17	dont you love it when "the man" is right down the street from you? __________________ '93 SSM Touring-S475... '87 Tii-LS1/T56

07-24-2009, 11:44 AM	#13
Chibana The Michigan "WANKEL" Join Date: Apr 2009 Location: Lansing, MI, USA iTrader: (0) Posts: 61 Rep Power: 16	I believe that I heard on Speed coverage or read somewhere that the SpeedSource 20b engines make 415 hp. Indeed. Here is the URL: http://www.speedsourceinc.com/index....&section=mazda (I love watching these things go around the track, spitting flame when they downshift just before the apexes.) __________________ 2005 Winning Blue Mazda3s 4-door 2009 Sparkling Black Mica RX-8 GT http://www.mattharrell.net/personal/cars.html Last edited by Chibana; 07-24-2009 at 11:46 AM..

07-25-2009, 12:00 AM	#14
dregg100 Rotary Fanatic Join Date: Feb 2008 iTrader: (2) Posts: 432 Rep Power: 17	of course they are going to say less than actual^^ __________________ '93 SSM Touring-S475... '87 Tii-LS1/T56