here are a couple of pics of the headders i built tonight...they are based on a design my friend made for his RX-7 while he was racing for his mazda dealership in the eighties

 

That kinda looks like a RB header, just without the Rb logo

 

RB headders if i remember dont cross over...they stay on the same side for the whole lengh...but the rear pipe (one on the inside) pops up to make both sides the same lengh...which can heat up your intake maniforld...which is why RB intakes have the heat sheild...this design doesent do that.

i should have mentioned that they are called fredders cuz the guy who designed them is called fred..ha ha

 

What Material did you use ?

And what Thickness.

They look great btw.

 

i used 2mm thick high pressure, carbon steel, fuel pipes...from a fire protection supply company. and we had the flange cut from 1/2 inch steel by a laser cutting company

 

2mm... thats it ?

high pressure blah blah... i dont know what the rest of that means.

mine are 0.250" or like 9mm wall... 1400* race pipes, and i STILL had a blow out last year.

 

wow...are you running a turbo?

 

no.. Just a 12a Non ported or honed, with Half hour Straight at the 5,500-9,500 RPM range gets a little warm.

most of the time its lightly Glowing by the time i am done.

 

he he he...very nice...we dont really have a national sports car club up here...just local...or i would run SCCA stock 7...what does a season cost if you dont mind my asking?

 

I dont run national either, just regional,
there is only 1 track in region,
and 1 that we Visit and run within our Series for Points.
9 or 10 races in a season, with entry fee and gas tires food etc etc.
about $5,000 a year, maybe a little less. Assuming i dont Fawk much stuff up.

Body work and Paint get expensive (only once so far, knock on wood.)

 

nice...when i was 16 i told my dad i wanted to race and he called me a ******* idiot...and that i would go bankrupt...but i think i will get into it next year...i have a few chassis around...and some extra cash...

in manitoba from what i have heard you run in the "under 2 liter" class in a rex...so i would be up against civics and small displacement european stuff...easy prey!

 

Thats what i thought too.,

but the CRX's are DOMINATING my class
Followed Closely by a Miata

Then i (all rx-7's) run with the Golf's and Mr2's

And i'm only 1 second off the fastest time set by a 12a FB
But the Lap Record ITA is CRX 2 Seconds faster than THAT.
so i'm 3 seconds off, my fastest lap to his.... no way to keep up with THAT

 

hum...why are the CRXs so good...i always assumed they had the normal 1.3L honda 4 banger with 120RWHP...do they just corner very very well?

 

1.3 ??????????????? WITH 120 ???? wow... god they WOULD be kicking our asses then.

that motor is lighter yet. but only producing 60 hp. at the crank

the 1.5 or 1.6 is what they can run
1.5 you can be lighter but its only 92 HP
1.6 you have to carry 140 extra lbs but you have 108 HP.

our rotary is 1.146L - and rated at 102HP and we have to be 150 lbs HEAVIER than the CRX with the 1.6L

PLUS they are FUEL injected, and have the abilty to chip.

We arent even allowed to JET our Crappy Carbs.

 

but RX-7s can make exaust mods...and you can polish your intake...remove the rats nest...port match the intake right??? wouldnt that get you an additonal 35-40 BHP?

 

crx can do exhaust too.
isnt tooo much of a rats nest on a 12a... but its gone, you can do that on a crx too.
no porting, none, for anyone
no polishing, none, for anyone.

i would est my car at about 120. but the crx's with chipping and others can get alot more than that.

 

Dito that in CSP autocrossing.

This year a new MR-2 won at nationals though. Then it was Miatas and CRXs for the rest of the top 9 and the same MR-2 with a different driver in 10th (the last trophy spot).

The only rotary powered car was an RX-3 way down in 20th and 23rd out of 35 total entries. Not half bad for a 28 year old car.

 

yes the CRX corners very very well.i've driven both prepped for ITA ( we have both). Very twitchy car. the rx7 is easier for people who just get into the sport since its so forgiving. damn FWD cars. and yes our crx is slightly faster. but we nicknamed the rx7 ole faithful just because on race day the 7 always seem to run while the others in the team are working on the damn honda.....makes my life easier atleast.

Ron

 

so for a sprint bet on the CRX, but for an enduro bet on the 7?

 

hmmm, I need a Fredder, I assume that they are named after the one and only Fred? Does he make these still, or did he just design them....If you know where I could find a header here in wpg. for a 12a (85) or if you could make me one of those you should let me know, im interested in finding a header as quickly as possible because my exhaust just gave out last night and I decided to basically rebuild the whole thing with a header, so if you.....or anyone can help me out with a header here quick let me know (pm me or something) and im sure we can work out a deal. Thanks.

 

um...i would have to ask freddy about that...he put in alot of work for the design and likes a bit of...well money everytime people use the design...if you know him you can ask if it is ok if you pay simon to make you a set (he will know who simon is.)

 

Why not put a nice 79 Rx7 into the race since they have the lightest body?

 

Looks nice, how much?

 

um...generaly we sell em for $300.00 USD...but this was kinda a nostalgic project...we havent made 12A headers for a while...and i would like to see how these work befor i sell nay...i also have to talk to fred...cuz he put in a **** oad of time and money into the design...and i would feel bad selling his work

 

In ITA/IT7? Uhhhhhh, you need to re read the rules.