.

 

and i know that he probably isnt near some it was just that he beat directfreak by a couple of ponies

oh and for the recordbooks, i want to see the video after this dyno session!

 

what is the JSC exhaust? And why do you say it has the best power gains I heard the full RB exhaust was one of the best if not the best for streetablity and power. Anyone else care to chime in? Just wondering

Thanks

Ryan

 

'85 12A
Bridgeported primaries
Streetported secondaries
Weber 48 IDA
Racing beat intake
Racing beat road race header
Carter 4-6 lbs fuel pump
Stock 1-3/4" exhaust pipe ( no time to change it to 2-1/2" )
Stock ignition
running 12.5 A/F
Tuned by me with an innovative AFM

133 rwhp
97 ft/lbs







Next on the list is to go full bridgeport on my new irons, full 2-1/2" exhaust, e-fan, front mount oil cooler. On the next engine i hoping for close to 200 rwhp

 

not to say anything bad about your setup... but why such a low number, reading through your list i was thinking i was gonna see 150-175 or more rwhp... maybe im just expecting too much with a 12a build

* didnt see the stock exhaust and ignition, maybe change that and probably pull another 10hp out of it, if not more maybe

 

I think he means to say SDJ headers ... they're the best headers made ... I would know since I have one they're pricey though ... they're all custom hand built to your specs in stainless steel.

You can find a picture of them here:

https://www.rx7club.com/showthread.p...&highlight=sdj

 

aklso what are some of you turbo 12a guys running for fuel setup? (12at, directfreak) as 1 of my few options for build, 12at has been one of them all along, im guessing yall went injection and dropped the carb ( stupid question, i see the microtech listed)... did yall buy an actual 12at or just build a 12a then buy a manifold and all of the other accessories for a 12at after the fact? thanks, i need some info on this badly

 

I'm also guessing that the stock exhaust is not helping or the ignition. both of those factors will be addressed this fall with the full bridge

 

http://cgi.ebay.com/ebaymotors/MAZDA...QQcmdZViewItem

 

Any way you look at it 4,5,6 and even 700rwhp is a lot to handle...

 

Not true, I have personally seen 12a PP engines make 280 hp with weber 48 IDA carbs

Very peaky power band though

 

ehh, deff. wouldnt want to do a peripheral port, i like having at least a little low end power lol... all i was saying is by the time you spend the $ to get over 200whp out of a n/a 12a, you coulda just gone turbo or done a 13b swap

 

355rwhp

 

On a stockported 12A the output was 126.5rwhp after extensive bolt-on modifications such as Sterling spec carb and a free flow header/exhaust with the usual deletions of rats nest, airpump and ac.This engine had done 62k miles when dynoed.

If I was going agressive streetport I would certainly use an IDA carb with the aim of 180+rwhp. The final output depends on whether you have to satisfy local laws.

For my latest project performance with a stock ported 12AT with stock turbo but new ecu, fmic, header/exhaust etc, the output was 224.5rwhp at 12psi with noise and emissions legal. This engine has done around 28k miles.I could go higher but for a daily driver this is more than adequate power, while some of the fuel consumption figures for higher states of tune are bankruptcy level.

 

no local laws, no rats nest, e-fan, 0 miles on agressive streetport, weber 48 ida, custom headers and exhaust, light flywheel, street/strip clutch, no p/s or a/c

 

Yeah, those. I always want to mix the SDJ with ISC Racing. SDJ is just not very memorable for me.

 

Yeah my car is injected. I started with a 12aT block from imported from japan. My fuel system consists of 2 x 800cc injectors, 2 x 1600cc injectors, malpassi rising rate fuel pressure regulator, 2 x bosch 975 efi pumps, 9 psi carter as the lift pump, 2 litre surge tank, 1/2 inch fuel line and a million fuel filters......

Hope that helps.

 

I have to agree, my powerband is very peaky and as you can see from my graph it comes on about 3000 rpm later than Directfreaks. Im sure his car is much much better to drive on the road. I only chose a turbo of that size as I had planned to put in about another 10 psi and shoot for closer to 600rwhp.

3100 pounds is fat as!!!! My car with me in it is only 2750.

Its funny, I have changed to an engine set up much more like Directfreaks and he is changing to one more like mine. Ha ha ha. Im sticking with the 12a though, no big block for me.

 

what intake manifold did you use? do you think i would be safe with custom throttle bodies with only 2 injectors? or should i go with something else? or is a 12at injected> i dont know much about 12at's

 

and whats the diff. between a normal 12a block and a 12at block? just accessories that come on it?

 

300rwhp on motor, little over 400 on small nitrous shot.

 

Hayes racing 13b w/ dual weber. 242rwhp at 6800. But I have run this engine over 10,000 rpm and it stays strong all the way up.

 

162



oh wait thats on the honda ya for o VTEC.

Oh BTW tranqul those plugs are in the mail and should be there sometime soon.

 

dyno sheet to proove 10k rpm your hp didnt drop? i guarantee it started dropping after 8

 

I have a 13bt inlet manifold and throttle body. You can but adaptor plates so it bolts up.

I dont think 2 injectors is enough. Yes the stock 12aT's are injected but they had 2 x 800cc injectors and they are maxed out at about 160rwhp. Also the standard throttle body has tiny little butterflies, that is why I upgraded to the 13b stuff.

The 12aT block has better chrome on the housings apparently, (like a 12a 6 port they have a H on the top of the housings instead of that little block), lower comp rotors. (8.5 compared to the normal 9.4) Also a high volume oil pump, injector holes in the centre plate, a tapped hole in the front plate for the turbo oil feed and an oil return on the front cover. Oh and a 4 line oil metering pump instead of the normal 2 line. Thats about all I can think of of the top of my head.