ive never seen an rx7 with FWHP...thats some pretty crazy stuff.
alot of hondas have about 190 FWHP.

I think a streetport 4 port 13b with 91ish rotors would be the best and most reliable way to get 200RWHP

were talking way over 100k miles of reliability here. Turbo motors really dont live that long.



im just jokin about the fwhp thing...dont get upset..

 

on a 12a, wber dcoe 45. hat, and manifold, i/c wastegate, and turbo...with exhaust system and an electric fan you have the option to boost more but if you only want 200 hp...there you go...now if you roll up next to an srt-4...crank it up a bit, boosting low psi youll make like 225-250

 

this will cost 2000 but youll **** an evo up...if u can drive...well li forgot to say get a good turbo

 

im about to be running a 12a streetport with a holley 600 4brl carb....along with a turbo....but without the turbo what would i look at for a quarter mile on just the streetported 12a b/c the car is completely fiberglassed...and i dont weigh much at all so im thinking that the car is maxed at weight around 2300....also i have a massive set of drag radials on the rear so i can even chirp them they just launch....

 

That's what I had before and what I'd do again. No fuss, no muss performance right there.

 

Or a 91 S5 turbo 4 port streetported with 91 rotors, should take a beating.

 

With today's bs rising gas prices, I'd avoid porting at all costs. For only 200 rwhp there's no need for it. Porting uses more fuel and bigger porting uses more still. The question asks about a "daily driver". I don't care who says what or owns what, that rules out completely bridge or larger porting. You can physically "drive" a Formula 1 car on the street since it has wheels and an engine. It doesn't make it streetable though. Hell even a Cessna can physically drive down a street (assuming it's wings don't hit anything). That is not streetable. Keep large port jobs where they belong. The track. The rotary already gets crap gas mileage. Why make it worse, louder, and give it a much narrower powerband all to just hit a measly 200 rwhp on the street? That's a terrible tradeoff. I don't care how cool or fun it would be and yes a bridge or peripheral port would be fun. This is a street car though and the fastest street cars were designed to remain street cars. Track cars aren't fast on the street nor are they practical on the street.

Leave the stock engine in it untouched. Save your money here. Add a turbo to it. Don't go crazy with huge turbos that everyone else says to use. There's no point. Everyone always (very wrongly) thinks to go larger with everything. Larger is ONLY better when you need it larger. For 200 rwhp, it can stay small. Remember that smaller is better until you max it out. Follow this rule and you'll always be faster with a wider powerband. You're only looking for 200 rwhp and it needs to be street driven. That means quick spool up times. If you want to stay cheap find a stock T-II turbo. Even on a 12A this will make the 200 rwhp goal quite easily with room for more. You could go aftermarket but stay small. Even a T04B only costs $450 brand new but can still far and away exceed the 200 rwhp mark. It doesn't have to be expensive or difficult. By using mild forced induction, you keep your idle the same, your gas mileage can stay very close to the same assuming you keep your foot out of it, but you've got the power you want when you want it, and at a much lower rpm. A 200 rwhp turbocharged stock engine will absolutely destroy a 200 rwhp nonturbo ported engine. It's all about the powerband. The more extreme the porting, the narrower the powerband gets. With smaller ports and a small turbo, you keep a huge powerband but with the same top end. That's more over the average and it's average power that makes you faster. A narrow powerband is really only fast in a car with a close ratio transmission. When was the last time you saw someone install a large ported engine in their street car and remember that the tranny is just as important too? Oh wait, no one has! These guys are slower than they should be all in the quest for that "brap brap" idle. Obviously a close ratio transmission would be terrible on the street. You'd always be at a high rpm and constantly shifting. No one likes to do this so why use an engine designed to work best with this? Makes no sense to me.

This is a street car. Keep the engine and the ports small. Add a small turbo. For 200 rwhp you don't even need an intercooler if you don't want one. It's always a good thing to have though. This doesn't have to cost much. You sacrifice nothing on the street. You only gained. With a large port job, you definitely sacrifice in several areas. With a bridge or peripheral port engine, you've got about all the power you are going to get. With a turbo, if you want more, turn up the boost. More potential and a wider powerband. It can also be had for cheaper and with less effort. It's a no brainer. A bridge or peripheral port engine can be very fun. They are really cool engines and it would definitely be cool to say you owned one. They just aren't practical for a street car though for the above reasons. They are best left to the track unless you are willing to make some very big compromises. Even so you may still be slower than you could have been.

 

Well said.

 

here is the most idealk setup to achieve 230rwhp without breaking the bank...
http://www.rotaryshack.com/CustomPro...0gxl/85GXL.asp

rotarygod , i couldnt agree with you more!

quote,
This is a street car. Keep the engine and the ports small. Add a small turbo. For 200 rwhp you don't even need an intercooler if you don't want one. It's always a good thing to have though. This doesn't have to cost much. You sacrifice nothing on the street. You only gained. With a large port job, you definitely sacrifice in several areas. With a bridge or peripheral port engine, you've got about all the power you are going to get. With a turbo, if you want more, turn up the boost. More potential and a wider powerband. It can also be had for cheaper and with less effort. It's a no brainer. A bridge or peripheral port engine can be very fun. They are really cool engines and it would definitely be cool to say you owned one. They just aren't practical for a street car though for the above reasons. They are best left to the track unless you are willing to make some very big compromises. Even so you may still be slower than you could have been.

 

thx rotarygod now i know what i want to do with my 1st gen
that sounds exactly like what I want, a PRACTICAL fast car

 

I fully agree with Directfreak's and 680rwhp's comments, Rotarygod's views are soundly based and well said. Certainly they will be the major influence in my decision.

Small turbo and no porting seems to be the consensus for the way to go regardless of which engine is installed.

Thanks for the time in giving me your ideas.

As the recently late commedian Dave Allen would say ' Let your God be with you'

 

[QUOTE=680RWHP12A]here is the most idealk setup to achieve 230rwhp without breaking the bank...
http://www.rotaryshack.com/CustomPro...0gxl/85GXL.asp

That looks like a good setup but Id think a s5 91 6 port 13b and good header, exhaust system,etc, electric fan and a sidedraft setup or holley would make 200 rwhp? Seems to me that would be cheaper than going the turbo route.??? And still get pretty good gas mileage?

 

My streetport got better mileage than a stockport.

As they say, YMMV. I'm probably only going to drive the peripheral port 10k a year or so (as opposed to 30k ) so I am not that worried about it.

 

i wish i would of took the time to write all the stuff rotary god did, but i just figured porting was ruled out because its like the last thing you need when you have turbo available, if its like scca or sumtin i could understand, but really who wants a 12 mpg streetcar? that only has 230 hp...n e body?
turbo is the answer...a very effecient design that should just become a standard peice of the engine...like a water pump or something

 

I have a streetported 13B that gets 20mpg. Well, that is when I drive it normally. I can actually watch my gas gauge go down when I stand on it, but I hardly ever "stand on it" when out and about. My car is rated at 215 flywheel horsepower, but on my bad tune up and crappy clutch, I'm not making potential.

 

Really? That's pretty cool! I wish mine got better gas mileage than it did stock. Then again I also can't keep my foot off the gas. It's just too fun! It's also my play car and doesn't get driven as much. I have a slow *** Civic that gets 35+ mpg when I want economy. If the RX-7 were my only car. I'd probably drive it very differently.


Peejay, I definitely think your car will be fun. I'd love to ride in it someday! Obviously you drive another car around though.

 

Only way I can see is a TII motor swap.

OR lots of nirous, a wet system and good carb/exhaust setup could do it if you can get 125hp from the 12a and another 75hp from the wet system.

a dry systrem with 75hp will blow it up though so only wet will work.

 

Those are some good comments. The "Best" option depends on your goals and how you personally weight all the factors, including the other cars you may own. Many of us already have turbo RX-7's or other faster cars which are not nearly as practical. If that is your situation, it may be appropriate to address the at the question from more of a "fleet management" perspective to decide what best fits your needs. Having owned many sports cars including every generation of RX-7 and several engine combinations, I can state some have served better than others as a "daily driver."

For a daily driver with such a modest power goal I would not even bother with a turbocharger. Turbochargers add complexity, additional points of potential failure, and increased maintenance requirements. They also require premium high-octane fuel which is considerably more expensive in many places. Notwithstanding the comments about the powerband, a well-tuned normally aspirated 13B--carbureted or fuel injected--can give you 200 rwhp or very close to it. A 6-port might be better for fuel economy and you could ask Jim Mederer what kind of mileage he got with the 13B 226hp streetport engine. (As far as intercoolers, I consider the stock 2nd and 3rd generation RX-7 intercoolers marginal, and would not recommend a turbocharger without an intercooler, especially for a daily driver, IMHO)

One of the most practical and fun-to-drive cars I have used as a daily driver was a S2 with 4-port 13B and dual SU carburettors. It wasn't as fast as my peripheral port race cars or 3rd gens, but it could hold its own on the autobahn, and was very "streetable." More importantly it had excellent fuel economy and lasted forever. I didn't hesitate to drive it anywhere: it ran reliably in all climates, across three continents, and never needed much more maintenance than an oil change.

 

The nice thing was I didn't need any gear other than 5th for any speed above about 25-30mph. Including hills. Not having to row your way around really helps because it reduces the tendency to overdo it...

I got the Nissan because it's quiet and it's something to drive while the RX-7 is laid up. I might end up driving the RX-7 full time, we'll see how my exhaust ideas pan out in regards to noise.

I get worse mileage in my 1600cc Nissan than I do with the RX-7... regularly 20mpg all highway. It's the EFI's fault, with a carb you can open the choke on the highway when the engine is cold. The EFI just stays in cold-enrichment mode, and on my drive cycle the engine barely has time to warm up, given that it's a big iron block with little waste heat to warm it up.

 

Cosmicbang. Thanks for your comment. As yet I have not found a 13B getting anyway near 200rwhp without porting or a turbo. About 160 seems to be limit. However, an old 4 port moderately streetported with an IDA after a lot of tuning and an efficient 2 1/2 exhaust system was getting around 200rwhp on a chassis dyno.

I agree with your comments on intercoolers, for a turboed engine they are the best way of getting power and long life from the engine.

As for my goals, most of my driving is long distance rural driving. My home city rarely has traffic congestion, but there is always a spare Suburu Outback in the garage. For local work trips I usually get a 4wd given to me for rough roads. To sum up, my Rex has a great life open roads, curves and hills to add interest, and minimum traffic.

In truth the present set-up is well adequate, but like all enthusiasts my ideal car is the next model up with more power. Living in Japan was weird, fantastic sports cars sitting in the garage and only driven round the block on Sundays as a status symbol.