Zzyzx Motorsports 2.5 RS breaks 300 NA HP

[svxsubaru1]

http://forums.nasioc.com/forums/showthread.php?t=850000

Thought it was pretty cool. Just imagine what we could do with another .8 liters of displacment.

[Chiketkd]

I saw that on NASIOC as well. Very impressive on a 2.5L engine! :cool:

-Chike

[mbtoloczko]

That's almost unbelievable. The MEP for that dyno run is 18.75 which is significantly higher than any other MEP I've ever seen. A 350Z in top tune has a MEP of about 15.

[svxsubaru1]

That's almost unbelievable. The MEP for that dyno run is 18.75 which is significantly higher than any other MEP I've ever seen. A 350Z in top tune has a MEP of about 15.

I heard they were using race gas, but thats still incredible. I just wish more poeple built NA subarus. expecialey the eg33 ;)

There only running 11.2 to 1 compresion I wonder if it would be possible to run on 91oct.

It really makes me want to build the eg33.

[Chiketkd]

It really makes me want to build the eg33.
Agreed. It really makes me want to tinker with our motor.

They estimate the 2.5L engine is making 302 hp and 276ft-lbs at the crank - that's 120.8 hp/ liter!!!

If the same could be duplicated on the EG33, it'll put out 398hp. That'll be in C5 Z06 territory!!! :cool:

-Chike

[Chiketkd]

Here's a pic of the dyno graph:

http://zzyzxmotorsports.com/public/dyno/20050914-dyno.jpg

http://zzyzxmotorsports.com/events/300hpna/

-Chike

[SVXtra]

A properly setup and tuned 2 liter 4G63 street motor produces 600 hp+.

[svxsubaru1]

A properly setup and tuned 2 liter 4G63 street motor produces 600 hp+.

not with out boost. This 2.5 liter, puts out 300hpNA.

[svxsubaru1]

If the same could be duplicated on the EG33, it'll put out 398hp. That'll be in C5 Z06 territory!!! :cool:

-Chike

I dont even need that much, i would be happy with just 330hp :D . Maybe i will try a NA build instead of tubro. 11.2 to one, hone out the cylinders to acept ej25 size pistons, cams vavle spring, full exhaust. Ahh i cant wait till i have money.

[SVXtra]

not with out boost.



You mean not without a lot of boost. When the Mitsubishi 4G63 starts to reach the upper levels of the horsepower stratosphere they are often times using specially designed and prepared HKS turbo's pumping around 27+ psi of boost. And then the owners swear they drive them daily. You can often times hear these EVO's coming from several block's away. My son [who still lives with me] has one such friend who is not allowed to visit after 7:00 pm.. :eek:

[svxsubaru1]

Ive heard of many 4g63s that are well into the 30PSI range, and are suposibley dailey driven. But then look at the U.S. STi ej257 an average tune with a decentley larger tubro also runs around 25PSI plus.

[SVXtra]

Ive heard of many 4g63s that are well into the 30PSI range, and are suposibley dailey driven. But then look at the U.S. STi ej257 an average tune with a decentley larger tubro also runs around 25PSI plus.


No doubt. I have heard of a gentlemen of middle eastern dissent who builds limited production STi's only in red that are backed by the full Subaru factory warranty running on 93 octane pump gas that dyno at 400 hp. I'm sorry his name escapes me at the moment. But if I can located the magazine article [if I haven't thrown it away] I will post more info on this amazing car along with his company name.

[svxsubaru1]

You mean esx motor sports yeah the limited run of red STis. There kind of pricey 50K+ for what he does to them, full exhaust and tune, paint, and a redone interior.

[Landshark]

No doubt. I have heard of a gentlemen of middle eastern dissent who builds limited production STi's only in red that are backed by the full Subaru factory warranty running on 93 octane pump gas that dyno at 400 hp. I'm sorry his name escapes me at the moment. But if I can located the magazine article [if I haven't thrown it away] I will post more info on this amazing car along with his company name.

Ali Afshar, Easystreet (ESX) Motorsports.

more importantly, the ESX drag car driver, Julie. :D
http://www.esxmotorsports.com/julie.jpg

[Matthewmongan]

i cant decide which i like more. the girl or the car. i would love to see this in a kit. im not a big fan of complex turbo systems. more to break more to fix.

[SilverSpear]

i cant decide which i like more. the girl or the car. i would love to see this in a kit. im not a big fan of complex turbo systems. more to break more to fix.

I couldn't agree more Matthew, this is waht i was talking about when i first joined this forum... can't we duplicate this RS tuning into our EG33??? come on guys, help... i am on to it :cool:

[Earthworm]

Looks like she's carrying a little extra weight...that's going to affect their times (not that the guys are complaining) :D

[Shadow248]

I like to think that I understand girls pretty well, i've been through an awful lot with them, and i'm usually pretty good at conversing with them and giving advice about them. With that said, girls who drive insano cars (especially in sanctioned events), really perplex me. There must be something, maybe even at the DNA level, that is "not right" about them. Not that i'm complaining, i'd love to have one of these "car girls", but i'm just saying that it just doesn't fit the standard issue female line.

There is a girl over on the LS1 board that built (almost completely by herself) an all aluminum 427ci LS6 T88 turbo motor for her 2000 Camaro SS. That alone is one hell of a feat, but she also races this car in many sanctioned events and also helped to organize the 2005 Power Tour. To add to all this, she is insanely hot. Where do these women come from? :confused:

[Earthworm]

She wasn't formerly a guy was she?

[SVXtra]

I like to think that I understand girls pretty well, i've been through an awful lot with them, and i'm usually pretty good at conversing with them and giving advice about them.


More than likely your use of the word conversing should be replaced with the word pleading.

And just how many times have you been dumped in say the last two year's?.. :D

[Shadow248]

More than likely your use of the word conversing should be replaced with the word pleading.

And just how many times have you been dumped in say the last two year's?.. :D

You'll have to go back alot further than that. I've been with my current girl for over 5 years now. Before that, i couldn't even tell you how many I went through. Alot. But you learn a little from each one. They are not as clever as they seem to think they are. :cool:

[Matthewmongan]

Hi jack!!!!!

[Phast SVX]

I like to think that I understand girls pretty well, i've been through an awful lot with them, and i'm usually pretty good at conversing with them and giving advice about them. With that said, girls who drive insano cars (especially in sanctioned events), really perplex me. There must be something, maybe even at the DNA level, that is "not right" about them. Not that i'm complaining, i'd love to have one of these "car girls", but i'm just saying that it just doesn't fit the standard issue female line.

There is a girl over on the LS1 board that built (almost completely by herself) an all aluminum 427ci LS6 T88 turbo motor for her 2000 Camaro SS. That alone is one hell of a feat, but she also races this car in many sanctioned events and also helped to organize the 2005 Power Tour. To add to all this, she is insanely hot. Where do these women come from? :confused:

one word.... Hades.. :D to tease us in yet another way. I saw a girl driving a gorgous mkiv the other day filling up at the gas station...BBS rims, no crappy body kit just a nice front lip PRISITINE...oh course muscles comes out of the gas station looking like a duche :/
phil
phil

[SilverSpear]

Hi jack!!!!!

what teases me most is when a thread is about to become interesting, it gets hijacked :mad:

[Chiketkd]

...of the Zzyzx Motorsports car at the USTCC Race at Hallett on 9/17-9/18. Their car ended up retiring during the race due to spark plug and fuel issues.

http://www.subaruforester.com/viewtopic.php?t=14378

http://www.peatpics.com/albums/album26/DSC_1794e.sized.jpg

http://www.peatpics.com/albums/album26/DSC_1796e.sized.jpg

http://www.peatpics.com/albums/album26/DSC_1790e.sized.jpg

-Chike

[SilverSpear]

I don't think this project was a failure, it just needs further adjustments ;)

[Chiketkd]

I don't think this project was a failure, it just needs further adjustments ;)
Agreed. I wasn't trying to imply it was a failure...

-Chike

[SilverSpear]

only if those mods were done on the EG33 it would have been for sure... A SUCCESS :D :D :p :p . Our EG33 is still the kind of subaru Boxers

[Chiketkd]

This went up on the Zzyzx website yesterday, and posted on NASIOC today to answer questions about their claimed power output:


September 26, 2005

Zzyzx Motorsports Impreza 2.5 RS - engine modification list
To keep the Subaru community informed of what we've done to break the 300 HP mark for a naturally aspirated 2.5L Subaru Flat-4 as outlined in our previous press release, we're including a list of modifications that helped get us there. Please understand, however, that not every detail is or will be disclosed about this engine as we feel it's inappropriate to do all the ground work, then give the entire receipe to those that didn't put in the time, money and effort it takes to achieve such results.

Mod list:

Subaru OEM 2005 2.5 RS spark plug wires
Subaru OEM 2005 2.5 RS coilpack
Subaru OEM 2005 2.5 RS fuel rail
Subaru OEM 2005 2.5 RS intake manifold
Subaru OEM 2003 WRX fuel injectors
NGK BKR6E-11 V-power spark plugs (copper)
Accufab 65mm Ford Mustang throttle body
TWE Stage III heads
TWE Stage II SOHC street cams
TWE 100mm 11.2:1 CR forged pistons
TWE 4-2-1 race headers (large primaries)
TWE 2.5" catless race pipe
TWE 2.5" midpipe
255 LPH Walbro fuel pump
Aeromotive fuel pressure regulator
Link Electrosystems LinkPlus engine management
108 Octane race gas
No muffler
No air filter - open throttle body

Misc:

Idle air control is achieved using a Ford OEM IAC solenoid.
Throttle position sensor on TB is Ford OEM.
Throttle linkage was custom fabricated by Zzyzx Motorsports.
Adapter plate to bolt Accufab 65mm TB to intake manifold custom fabricated by TWE.
Engine oil is Motul 300V 15-50.
Transmission and rear diff oil is Redline Shockproof Lightweight (smurf blood).

Tuning:

All tuning was done by Jake Diehl at Dieman Motorsports in Lees Summit, MO.
The dyno is an MD Mustang IMP dynomometer.

http://zzyzxmotorsports.com/events/300hpnamods/

[Chiketkd]

Originally Posted by Chiketkd
1) Is the displacement of this engine still 2.5L?
2) Is max power truly produced at 6,500rpms?

1) Stock pistons are 99.5mm and we're running the TWE 100mm pistons. So, yes, the total displacement is under 2500cc.

2) Yes.

http://forums.nasioc.com/forums/showthread.php?p=11187397&posted=1#post11187397

[Matthewmongan]

hmm.

hmm.

i think we should all go out and buy imprezas. the old 2dr body looks good going fast. i know a guy who can get 22b fiberglass fenders, and bumper. i smell a na 22b clone. hell, by the time i graduate and have time to empty my brain of all my ideas this motor will be a kit.