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?

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

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.

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....

older 20B`s

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

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..

http://www.rotarycarclub.com/rotary_...1&d=1247079550

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.

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.

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.

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

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

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

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.)

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

I just heard these beasts run on barbers last weekend. Absolutely nutty. They sound like F1 cars