Tis the 2.5 cat back!

what!!!!???? holy shit!

True story..

that's flippin awesome :)

What kind of wastegate are you running?
What rate spring?
I'm suprised the boost didn't go any higher...
I think you're running too "small" a WG spring?


-Ted

Its possible. Its a TiAL 46mm with a 12 lb spring.

iirc a 2.5 dual outflows a 3" single if it was just piping but the mufflers are where it even out the playing field so nothing surprising about those numbers with 2.5" duals, just shows you don't need 4" piping to get decent peak #s

i will be dynoing my car in a couple weeks, i just hope i can get my hands on the methanol injection before then, funds are kinda tight at the moment. i really don't feel like pushing 17+ PSI through this tiny turbo anymore on straight pump.

Lesse...
12# spring...you're only running double that.
Yeah, you should be good.
Funny, isn't the turbo good for 30psi?


-Ted

Man do I feel at home on this site. So J-Rat how much more do you think you can squeeze out of her. I want a turbo 2 someday when I graduate college but it ain't looking good right now. How often do you kill the Rustangs with that car on the street, man is that car a sleeper.
Nice numbers man keep it up.

I dont think any mustangs have a chance , maybe if the mustang has a forged pistons and a supercharger on it , even then Id still bet J-rats car would blow its doors off, mustangs are tanks.

My brothers old 1990 Eclipse Gsx with a 3" turboback exhaust would make mustangs look like crap on the highway racing with a fullboat (4 people).

He didnt even have to downshift , he'd keep it in 5th gear and walk the mustangs no problem and from a stop of course he'd kill them since he has all wheel drive.

Im sure J-rat may have some wheel spin on the launch , but if he has good enough tires it can be prevented and stop spinning by the time he switches into 2nd gear.

Youd need slicks to see the real potential 1/4 mile time the car would get with full traction.

I think with the right turbo hes capable of hitting 550-600+whp as long as the motor will hold up.

how long would a motor last with 550hp -600 cuz I think he drove it to the track and crispeed has one pumping 685 and he drives the heck out it unless that was just for the vid

ok. so I finally got an answer, its the 2.5" catback.
Man I've been telling you, step up to 4" catback!

and double the wastegate spring? Why not play w/ a 20psi spring or something and see how it reacts?!?

Im just talking out my ass but I think theres still some more oomph in that turbo



Karack: not 2.5" for the duals, but 2.5" from Y pipe and split into even smaller. Its the RB T2 Catback that isn't the turboback

I say go 4" to dual 3", but I dunno if you like your quiet exhaust setup. It is quite cool seeing you pump out that massive horsepower through a 2.5" exhaust.

I would think being 3" from turbo and then 2.5 from catback gives the exhaust gases time to cool down and not need quite as much area to flow.

Reguardless, quiet 500rwhp rotary. Who wouldve thunk it

Well, crispeed runs straight methanol I think. J-Rat runs pump w/ methanol injection (i believe). mmmm, tastey

rat uses C-16 on the track and Premium w/Ethanol AI on the street.

Is this engine made with all S4 irons? Just wondering.

No, it is not.

J,
What size back half is your turbo? and the car weight with you in the car?
chuck

J-rat is my new hero and idol now! If he can do that to his S4 on stock ports, then i can to! lol j/p Nice #s tho.

LOL!!

Thats not a stock motor anymore!!! Its a ported and built one!!!

Out of curiosity, how much did it cost you to get that much power outta it (not including the tuning time)? And how much did the tuning run you? I'm relatively new to tuners, and really new to rotarys. I was getting kinda disappointed with the power numbers these engines were putting out, but then I saw this thread. I know it's not cheap to get this level, but I am not sure just how expensive it is.

not cheap at all....im at pry 3K (paid $950 for the S4 TII) and im not even CLOSE to being done...

it would probably run about $5k for all the mods to get to that power level.

now, unfortunately most people have to go through phases to reach this kind of level. i have yet to see anyone make it on the first try without spending assloads of cash in the process(i mean like $10k+).

could not have said it better myself...

yep, that's exactly it.


my current setup cost me about $3500. (between the engine, ems, turbo, etc - and I took the cheapest route everywhere) - and I'm easily $10k into it though over the years, "learning" engines, 3 different exhausts, 4 different turbochargers (5 as of tonight, bye bye TD07), paint, maintainance, etc....

but when you think about it, there's not too much you can buy for $5k that will hand $150k cars their ass on a platter. It's $5k well spent. :D

Any track times?

Andrew

better watch out rat, im working on a setup to make 500+ to the wheels on pump/AI. :)

I think I just found my new engine builder. All you need now is a sticker that says "I wanna go fast"

http://tobetheman.com/wp-content/upl.../wall1_sml.jpg

11.1 so far..

Bring it homie! I got a new turbo setup in the works that should get me to 600...

what are you goin with a TEEEIGHTYEIGHT? t91
OOH how bout one of those IhI TPL9lB

I am secretly trying to touch tha big 500 (but dont tell anybody)

the pt67 should do it :)

What kind of 60 foot time?

Andrew

It seems like the numbers were made with the boost spike/creep, rather then boosting to a straight psi and holding it till redline...of course the numbers look good with the spike, then bleeding down to the 20 lbs or so at redline. To force it to hold the boost, a stiffer wastegate spring is needed, and once you do that and it still bleeds boost down, then you know your turbo is out of breath. I had a 61.5mm compressor wheel, and we tried running it to 30 lb with a 22 lbs wastegate spring, but it just kept bleeding down to 27 lbs.
Also, why does it seem so laggy and the full boost powerband too short? I made 27 lbs boost at 4500 rpms and it held that boost all the way to redline...about a 4K fullboost powerband. See how flat the torque curve is, which is what you want, and hp lines are...and the boost is rock solid . smoothing of 0

561hp w/ a 61.5mm turbo? d a y u u u m haha

damn...600 on stock ports and stock exhaust. :wink:

[/QUOTE]
Quote:
Originally Posted by J-Rat
Bring it homie! I got a new turbo setup in the works that should get me to 600...




hes not on stock ports no mo

- Jarrett

Wow, on stock ports!!! :rlaugh:

plz read entire thread. kthnx.

stock tranny,rear end,axles?

awesome numbers man

Do you think you've gotten all the car can do with the 490 whp? I've always been a big advocate of using all the current hp before trying to make more. Thats why...I'll be sticking with a stretch goal of 425 whp this summer and then this fall/winter make the push for more. 11.1 though is stinking fast so maybe you have..

Na.... I am about positive he runs 4 x 1600's on one walbro awiht an E11 from what i saw.... and that not enough injector and pump to be running methanol at those power levels

I plan to run E85 with HP goals of around 600.... But on an REW motor and gt42

I think crispeeds car was a t76 with either a q or s trim exhaust....

Jrat what is up your sleeve for a turbo?? at least a 70mm inducer? :)

Will be a 67mm inducer. Not sure I really care to push for 600 anymore. 550 should be fine.

:)

i swapped the 57 trim to the pt67 for about a month, then found the cheap gt42 so went for it.......

all i know is that the 67 will get you there..... my car was unbelieveably faster on the 67 vs the 57 on same boost levels, never went more than 14psi on a rough street tune and it had to be at about 430ish wheel, not even tapping the potential of that compressor....... wonder alot if i am foolish for not pushing the 67 and instead going with maybe a lag monster 75mm 42

and the 57 pushed my car to 11's on 14psi

will you run a larger hotside than a P-trim?

anyway you're still the man.......... anyone who pushes a 61.5 compressor to near 500hp knows how to make the most of a turbo :)

I wish I could take credit, but that goes to Ryan(Moremazda), Glen Weaver (AZRotaryRockets), and Trevor, the tuner extraordinaire. Without them I would have never made it.

Gratz J-Rat on those numbers. got a question though, what do you have for a driveline? stock trans and driveshaft? or have you upgraded?

Its all stock driveline except for an upgraded clutch...:)