S4 6-port motor with S5 TII intermediate housing = my hybrid motor.

Very agressive street porting done to both the intermediate and end housings. Exhaust ports were cleared of the diffusers and also opened up a bit. (exhaust timing was not advanced, but the durration was extended somewhere around 5-10 degrees)

 

gsr gsr whats wrong wit your car . who can beat a gsr . i raced stangs v8 wit my na cats still on and beat them 0 to 60 racing . i had cats but flames were coming out . so yeah and a k&n thats it. 86 rx 7 . na turbos are better but for a na my last car was pretty fast.

 

Jimmy325i, your setup sounds similar to what I've built this winter for my 87 NA. Information on my setup follows:

S5 NA end housings
S5 turbo rotor housings
S5 turbo intermediate housing
all housings are brand new and street ported
intake and exhaust, ala mazdatrix.

S5 NA rotors, new
RB hardened stationary gears, 3 window bearing
oil jet mod (weber jets), thermo-pellet plug, FD corner seal springs.
stock 2mm apex seals and side seals, all new (rotor kit and gasket set)
uprated oil pressure regulator, shimmed oil pressure relief.
RB SS oil cooler lines
new stock water pump
RB header, presilencer, Y, and mufflers.
ported intake manifolds, port matched, ported TB, all emissions removed, no rats nest, no junk on TB.
RB aluminum eccentric shaft and alternator pulleys (double sheave)
OMP eliminated, drive gear and shaft removed from front cover, feed passage tapped and plugged in front housing. Running premix.
RB aluminum flywheel, street/strip HD clutch, street/strip PP
SR Motorsports aluminum radiator
stock injectors, cleaned by RCE.
stock computer for now, after break-in is done will switch to E11 most likely.

I WILL be taking this car to the dyno, and at least will have gtech #'s for it. It is not finished as of yet, I am waiting on new diffusers for my primary injectors from mazdatrix. I have no 'proof' of the performance of this setup, I do however have speculation from mazdatrix and others who are experienced with building rotary engines and race them regularly. Mazdatrix, where I bought most of the new parts from, speculates ~240HP possible with this setup (thats at the flywheel). If you get the car weighing ~2400lbs, with this power, it can run mid 13's on street tires @ the strip... according to the typical power:weight 1/4 mile calculators.

If you don't believe me regarding this setup, I have most this stuff photographed, these are the last pics I took:
http://pengaru.com/~swivel/cars/rx-7/01-01-2003/

heres most of the new parts when they arrived:
http://pengaru.com/~swivel/cars/rx-7/09-17-2002/

and heres pics of the engine assembly:
http://pengaru.com/~swivel/cars/rx-7/10-29-2002/

there are alot of people on this forum that are very close minded, many are just plain morons... I usually just read this forum for amusement when I'm bored at work... but this thread has gotten out of hand and everyone is giving Jimmy325i a really hard time for no good reason. Who cares wether he has the stuff or not, the mods he refers to and claims to have DO have power gains and will produce a fast car, alot of people attack the plausibility of the setup being faster than say an S2000. Think for a moment, he's claimed 2400lbs in the past, which is certainly plausible... with the mentioned mods ~240HP is achievable, whats a stock S2000? 250HP? how much does it weigh? Considering it's a roadster, probably significantly more than 2400lbs! 2800lbs actually. So, it is technically possible for a nicely built NA FC to be faster than a stock S2000, ESPECIALLY on the street where you do have alot more variables, and the driver may suck etc.

I don't know Jimmy325i, but I don't think the treatment he's recieved is justified, he comes off kinda pompous at times... but maybe his car is cool and he likes it? *shrug* he hasnt shown any proof of his performance, but he hasnt proven it to be lies either...

Jimmy325i, I find it hard to believe with all your friends with 13 sec cars, none of them have a performance meter of any kind? AP22? gtech? these people want numbers, why don't you show them up? You claim to make these statements to help people, your statements are worthless if theres no definitive information in them, nobody is going to put your mods to use unless you back it up with #'s. If you want to help out the NA guys, take some pics, gauge the performance, and record the results. There's more NA RX-7's around than TurboII's, if you made yours run 13's plenty of people will be grateful if you enlighten them.

At least I have photographs of all my work, I do it all myself and it should satisfy the burden of proof everyone has tried to lay on you. My engine is not complete yet though, so I cannot provide numbers yet. I will, however. Sorry for the long post, hope you guys like the pics.

 

I had a buddy with a first gen g-tech and was itching to get my hands on it this past fall only to find out another friend of his broke it. My roommate with the 12.69 @112 12psi (on slickes) LS turbo teg has just blown his motor. (cracked rod) no interest in a g-tech because he was dyno'd at 236@ the wheels. Funny thing is that my slowest friend with a `97 sunfire is the one who's been thinking about getting the g-tech for a while now. Maybe he'll get it... I'd rather spend the 150 bucks on fuel mods.

I don't even have a scale slip for the weight of my car. I get it weighed at a gravel landscaping place free as long as I don't hold up thier business.

I also chose not to take pics of my porting for the mere fact that I want my design to remain mine. I will say that mazdatrix templates for the side housings are rather conservative in comparison.

I've gotten the attitude lately because this is the respect and treatment I've recieved for the past 2 months on this board whenever my power potential has been mentioned. I'm fed up and yes I will get really arrogant just to scoff in the faces of those who feel so strongly that what I've done is not possible. I've made open invitiations to come see the car for themselves and no one has shown any interest in disproving me to my face. Tracks are closed, theres snow on the ground, and my car still runs damn fast for an n/a. I'm not going to **** money away for dyno proof when I still have mods that will cost money yet to be done before tuning can begin.

I figure somewhere around 200 at the wheels and with what I've done in actual runs against people, that seems pretty accurate. I just got the pics of my s-afc I took on christmas morning back from my sister. 63.9% @ 8202rpm. Whats sad is that I wasted two pictures (real film) catching this display and 2 days later managed a 65.1%. I guess thats up in turbo territory because everyone thinks thats bullshit too.

 

Oh, and my friends who are lower than 10's all don't care about g-techs either. My fastest v8 buddy is running 9.6s in a 66 chevell. He's been on the power tour for 3 years in a row with his `81 camaro. Fastest 4cyl buddy is running 7.91s in a rwd eclipse.

We all really don't care about proving ourselves on paper. We go race and beat people and enjoy that enough to make it worth while.

There's a 13b carb'd rx-3 wagon that runs at one of the local tracks doing 14.3s on a street ported 6 port motor without the sleeves in it.

 

hey jimmyi325whatever.......just to let you know, that if you swap to a tii trans, you are swappin the whole drivetrain brotha.....trust me, i helped do a na-tIImotor swap, and that was our original plan . to keep the na driveshaft and rear, but theyre totally different.....tII stuff is obviously beefier than the na......

 

auto drive shaft will connect the t2 tranny to the n/a rear end. I can also have one custom built pretty cheap.

 

when i get back from basic training in may ask me how much hp im putting out.

Oh yeah Ill be running a hybrid 4 port motor (laff) oh and it will have tII housings *cough* *cough*
(tII block/streetported w/ s5 rotors..ect.....)

 

I'm confused about using the TII intermediate housing. I copied a TII secondary port to a NA intermediate housing and there was plenty of casting. Why do you use the TII housing which has hardly any casting due to the water passages? There is clearly more room for a big port if you try it.

 

The S5 casting is thicker. You start with the turbo port and make it even bigger from there. My primaries are easily 50% larger than stock.

 

Gotcha. I've only seen a S4 turbo housing.

 

219bhp @ the rear 1975 Mazda 616 - 13B J-Port 48IDA Weber runs 13 flat all day.

 

What does that car weigh?

 

Bout 950kg with driver.

 

That's gotta be a fun ride....

 

12. Thats right, 12 hp.

 

14.2 @96 125 shot of Nitrous But its still non turbo

 

that sounds a bit slow dude.

 

So, what horsepower would one expect a stock '91 N/A with 124,000 miles to generate?

I did put mine on a dyno to get a base figure (before the mods started) and the results were 126hp and 108 ft/lbs of torque. I was told this is respectable for a completely stock car with that kind of mileage, but it's lower than what I expected.

 

Did you give it a tune up first? Plugs, wires, fuel filter, air filter, check timing....

Did you check compression too?

Auto or 5 speed?

I wouldn't put a car on a dyno without first knowing it was in tip-top shape or was using the dyno to find a problem.

 

True, I wouldn't bother wasting money (but then again the excitement factor is high so I can see why some people do it ) on a dyno run until I made sure the car was in peak condition (for what you bought not factory specs...just everything in working order). The TQ number seems a little low, the HP numbers are good though. You've got a pretty good motor with that mileage (I have slightly more mileage with 125,581, I haven't been to a dyno though) though. OOOOH...I didn't realize that was a '91 motor, in that case the HP is a little low too sry. But it's still not TOO bad just in need of a little help.

 

Oh, Just to kinda keep everyone posted on the progress I'm making towards my very own dyno session....

I have the walbro and will be getting my 550cc secondaries this week. (crosses fingers for USPS to do something right) If that cures my inability to exceed 8300rpm, I'll be pinching pennies to get her to the dyno. But, I might get a new set of 225 rear rubber first.

This peeling out rather than accellerating is getting old. Spining tires while staying next to a damn modded neon pissed me off the other night. My dunlaps don't grip for **** when they're 10 degrees F either. But I did waste his *** when I hit third.

 

Actually, I had done everything you mentioned except a timing or compression check. I completely agree with you on knowing everything before you go to the dyno, but the reason I went without having that checked is that they were having a Dyno Day at Rotary Performance and it was only $30 for two runs. I figured I'd just get some base figures.

It's a 5-speed.

 

yeah, can't beat that price... i'd sign up for two slots and get my car tweaked lol

 

True that...I'd have done it with a car that barely ran! j/k I would check the timing though if I were you.