SoloIIdrift

So Rx7Kid, how much did the engine cost? What mods are done to it, I'd love to see a dyno and how streetable it is.

Eprod, drop me a line here, or does anyone know his email?

I'm curious as to what a 240hp 13b would cost.....

FPrep2ndGenRX7

Not to shoot down what you want to do but if you put a ported engine in your car you will automatically be in F-Prepared(FP) or Street Mod 2(SM2). Your car would be about 600# to 800# overweight(minimum weight is 1900#) to be competitive in FP but SM2 might be a good place for you. You can run good street performance tires and probably have fun and be competitive locally. I thought about running in SM2 but decided to build a dedicated racecar.

MasteRX

Defenitely would take a peripheral port engine. That would mean about 300hp at the flywheel and all the horsepower would be at the top end. In fact, the higher revving you could build it, the more horse it will build. It would be an absolute dog in the low end though. The idle would be extremely rough as well. http://www.mazdatrix.com/r-20.htm

SoloIIdrift

Hmm, Yeah I knew I'd be in an advanced class, but I hadn't done the research on it yet. I've been autocrossing for a couple years, but this past season is when I got into it, but still haven't seen the new class changes. My friend is in SM which isn't TOO bad. Whats SM2? Same thing as SM but with street tires?

What class would I be in with an N/A but no streetport, but w/ full suspension/intake/exhaust/ some interior stuff gone?

Besides....how would they know I streetported the engine

just kidding....Thanks for the advice though...I'm veering a little off-topic here.

SoloIIdrift

I don't think this is such a hot idea on a street car....and my personal goal is to build a solo I & II car that is right on the edge of being streetable, so it's street legal, but just on the line. So low end would be nice, plus I don't want to rebuild the motor every 20k.

Anyone with a PP wanna chime in?

mazdaspeed7

Ive talked to Pp13Bnos a few times, and he didnt have any problems with his PP 13B on his street car. Idle is pretty high, but power off idle is still better than a stock ported n/a. but once the revs climb, the PP starts to scream its way to 240 rwhp(on his car).

Personally, if youre that worried about low end, save yourself the trouble and get a V8.

RX7Kid

Mods That are done to it are as listed........

1.13b Periphrialport Motor Built By Pineapple
2.Stainless Headers
3.Weber carbs(Custom Intake manifold)
4.fuel pump and all other misc stuff...

Price 3500 to 4000

Not really alot of stuff done

FPrep2ndGenRX7

SoloIIdrift - To keep the car on the edge of street legal you probably can't port much if any at all and still pass emissions. I would definetly suggest a good stock N/A car(89-90 GTUs) and get as much seat time as you can. Put a good set of adjustable struts and some R'compound tires and run in ES(i think).

SM2 is just like SM but for 2 seater cars like SC and turbo'd miatas and similiar cars.

SoloIIdrift

Good thing in NY (upstate) we don't have emissions! Hehe, as of right now there is only a visual inspection for a cat, which I also plan on getting around, basically you just have to know someone that'll hook you up with an inspection sticker. Although they are talking about in the future switching to hooking the car up to a sniffer for yearly inspection....in that case...I'd be screwed.

Yeah I ran in ES with my Integra stock, pretty competitive class, I WISH I could find a GTUs, that'd be nice, but I'm being realistic and cost wise I think it's cheaper to find a series 4 base without a sunroof and build it. Thats the plan anyways, and basically when the season starts, whatever mods I have I'll run with that class, if I'm not competitive this season it's not going to break my heart, like you said, I'm just after tons of seat time, with a fun daily driver.

Rx7 kid, when's the dyno numbers coming! That sounds like an interesting setup.

breesej

[QUOTE]Originally posted by FPrep2ndGenRX7
SoloIIdrift - To keep the car on the edge of street legal you probably can't port much if any at all and still pass emissions.

[QUOTE]

Not true. I have a ported motor and passed California Emmisions (arguably the most strict) with flying colors.

You couldn't compete in anything less than Prepared or SM class out here with a ported motor.

I run CSP since I asked for permission from all my competitors. They said it would be cool since I'm not 100% set-up nor is my driving 100%. I suspect that when I do take a podium finish, I'll have to relinquish it and bump to the next class.

FPrep2ndGenRX7

breesej - Notice I used the word much meaning yes you can but don't get carried away. I would imagine a mild street port with a properly functioning air pump and cat-convertor would still meet emmisions but the bigger the port the more air/fuel mixture gets in the engine, the more a/f mixture in the engine the more dirty exhaust the car puts out. The factory fuel injection and/or a properly tuned aftermarket controller would probably need to be used. I don't think a weber sidedraft is going to pass visual much less the sniffer part. Lucky me because thats what I use(weber) on my FP car, not that its street legal.

mazdaspeed7

bump

Bambam7

4" Exhaust... Holy crap. that's about 12.5"^3 of volume!
Compared to just under 5"^3 for a 2.5 inch pipe.
Can it be said that the standard 2.5 inch systems (with a 2" cat back- which is way more than 1/2 the volume of the main pipe anyways, -since it's now two pipes- not really needed) is grossly undersized?
I just paid a lot of money for a stainless borla race XR-1... in 2.5 inch. Am I choking??

mazdaspeed7

Choking? I seriously doubt it. Possibly not gaining the extra horse or two from a bigger pipe, but you would have a broader torque curve, which is more desirable for a street car anyways.

SoloIIdrift

bump

mazdaspeed7

Looks like time to archive this. Theres lots of good info in here.