Advice on RX7 Spec - NA Engine
 

Hi

I'm looking for some advice on an RX7 1994 were looking at buying.

It has the NA Engine, and so far all I can find is conflicting opinions on it. This is the full spec below I'd be grateful of any comments as my technical knowledge is pretty poor.

Defi link Module
Defi Gauge Oil Temp
Defi Gauge Water Temp
Defi Gauge Oil Pressure
Triple Pod Cluster

Short shift Gears

ENGINE

NA Engine fitted
HKS Mushroom Filter
RE-Amemiya Exhaust
RE-Amemiya De-cat
RE-Amemiya Dolphin tailpipe
Samco hoses
Twin oil coolers

HKS F-CON GOLD ECU

SUSPENSION and BRAKES

Aftermarket Suspension
Front Strut Brace
Rear Strut Brace
Battery Relocated to Boot

All abit of a mystery to me, if any one could advice what bhp, speed you could expect out of this that would be really helpful.

It's purpose will be a weekend car, attending shows etc rather than day to day or major racing..

:)

Cheers
CC

Do you have any pics?

I think you'll find it difficult to come up with numbers because the 3rd gen rx-7 was never sold in NA.. so it's hard to tell exactly what you have there. I don't think there is a lot of information on how well the stock computer is tuned for running solely NA. I second the request for engine bay pics. Maybe we can pick out some clues.

Yes but I was trying to avoid the abuse I'm gonna get for showing it t u ;-)
 

Ok so here goes I know it's ott and not to everyones taste but I love ott cars so please take it easy on the kit :lol:

http://www.pistonheads.com/sales/432106.htm

CC

If its a Normally Aspirated 13b, expect 170-190 crank HP depending on setup.

I would think that if they went through the expense of that kit, they may have used a 3 rotor aka 20B. That would be pretty sweet but can't tell from the description or pics.

Surely it is a p-port of semi p-port or something. I know the 13b-rew is unreliable and all but not so unrealiable you would be happy with a 165rwhp engine swap :confused:

If it is a properly built P-Port then jump all over it if the price is right. I would love to have a 2 or 3 rotor p-port NA fd.

Not Sure
 

All I know about the engine is a 13b na engine i think. Ports I've no idea at all. :Wconfused

Thats a first. Never knew they came in N/A.

The closest thing I can think of is when driving with a massive boost leak and the turbos not working....it just doesn't go anywhere.

I'm pretty ignorant, but is it possible they just removed the turbos from the engine? Isn't the rotary that is in the RX-8 pretty close the 13b but NA?

from what i understand internals are different in many ways not to mention higher compression

If you wanna do it right, yes.

But that doesn't mean it was done like that.

Dave

Nope, the renesis makes more power than a 13b.

No engine bay shots?

Getting some pics hopefully today
 

I've requested some engine bay shots so should be able to post them later today.. I'm still trying to get hold of the dealer, and Dragon Performance to get the true details from them but seem to be struggling to get hold of them.. I didn't realise an rx7 engine could this mysterious...

It's driving me mad really want the car but want to know what i'm buying and what I can expect from it. I'm only 24 and blonde ;-) so the fact that it's not a turbo is probably a good thing but need to know what it's capable of..

Another rx7 owner told me this on the engine -

"well tbh is a n/a motor and im told its a periferal(sp) port with 400fwhp. this will be a pain in the ass to drive and expencive to fix if/when it goes wrong."

But what that equals in speed and hp I'm still confused :Wconfused

Will post the pics as soon as I've got them... Hopefully that may clear things up..

^ ^ don't take anyones advice who says RX7 and fwhp (front wheel horse power) in the same sentence.

Why are you buying this car? You don't seem to be very knowledgeable about RX7's or cars in general for that matter (take no offense to this).

Why not start with a stock RX7 and not waste $20,000 on a car that you don't know anything about. Then at least you know what you're getting.

Solved kinda!!
 

Ok finally had the answer from the guy on what it is.. it's the 13b with the turbo's removed giving 200bhp or so i'm told.

http://www.imageox.com/image/211758-engine21.jpeg

uhhh... ok... yeah thats not a lot of power... and its not going to make a lot, you've got a low comp engine without turbos on it... i think you might be making like... 160 to the wheels? maybe a little more?

If they built it right, they should have broken down the block and went with higher compression rotors and ported the block...

IMO i wouldnt buy that car... it doesnt sound like a lots been done to it save removing the turbos...

and are the windshield sprayers ziptied to the windshield wiper?!

I may not know a lot about them but that doesn't stop me having one, and the reason for my post is so that I could find out about it. . I want the car because in looks it's what I've looking for..

Problem I have is that a standard car doesn't do for me in looks but the moded cars that are nice in looks have to many engine mods for me to get insured finding the right balance is difficult..

If you're really set on buying this car, or indeed any RX7, try getting someone who really knows about these cars to take a look at it first as well as doing some research yourself. There are some very knowledgeable rotary specialists around, when I was thinking about buying my car the garage I was buying it from took it to a specialist to check it out first with me present. The specialist (RX Motors in Dorset) ran compression tests and checked various other things and confirmed that the car was good. Put the time in first to make sure the car is good :)

+1....dude dont buy it!!!:icon_tdow

That is the worst idea I have ever heard.:wallbash: :icon_tdow Dont waste your money. Go buy a rx8.

Why?
 

Whats bad about it apart from the loss in power? Does it give any other problems or benefits..

I know your not liking the loss in power but for me thats not an issue as i won't be racing it and like i say ins is cheaper but what knock on effects does it have if any other than that or added benefits I would assume the loss of the turbo's would make it more ecomical no?? Would it have any effect on the engine life?

If it's stock or street ported, the engine will last longer, burn less gas, and run cooler. If it's peripheral ported, it will still run cooler and last longer but the fuel economy, noise level, and emissions could get ugly. P-ports are essentially race engines. It won't idle smooth and low like an ordinary engine.

The downside is that you've taken one of the purest of sports cars and essentially crippled it. Those 40lb wheels don't help either. It's your choice - don't let the kids in here rain on your parade.

Dave

Another thought to consider. Your description confused folks here on the forum who know a LOT about RX-7s. It also sounds as if you are no more of a mechanic than I am and don't know any more about them than I do. That means that you are going to be at the mercy of finding a mechanic that can work on this car for you. A stock FD is hard enough for a non-rotary specialist to work on. A highly modified mystery FD sounds as if it might be worse since the mechanic first has to figure out what the heck has been done to the car to begin with. If you can't do the work yourself, you can count on spending lots of money on service and repair.

I can understand buying the car for the way it looks and I agree it does look great. I can also understand you not necessarily wanting a high horsepower car. Just be aware of what you may be getting into.

FWIW, I like the idea of buying an RX-8. It is going to be reliable, easy to find parts for, under warrantee, fun to drive, easy to insure, easier to have maintenance done on, and much MUCH better for a daily driver if you need one. It may not look as cool, but given time there will be added body kits available for it as well.

So let me get this straight. You know very little about Rx-7's, and you want to buy one that is clearly HACKED UP beyond recognition????? DO NOT buy this car.

Just get an Rx-8.

I noticed that too. :lol: