Naturally Aspirated Subaru Pulls 7 Seconds In The 1/4!!

MY99 2.5GT · 11-23-2001, 01:34 PM

About a month ago I went to the NHRA Keystone Nationals near reading PA and saw this 7 second Dragster equiped with a 3.3 litre SVX engine. This naturally aspirated engine was converted to use two 2-Barrell carbuerators and Hi Rise Intake Manifolds.

I spoke with one of the racing team members about what they went through to modify this engine and what kind of power output they were getting.

Not suprisingly he said everything had to be modified. It was bored out and running 13 or 14:1 (I don't remember exactly) compression. Suprisingly he said the stock crank was still in there?!

They estimate it produces 400-500 hp. Unfortunitely is was up against a late model Mustang with a Big Block implanted inside. even with a pretty heft handicap the Mustang caught up and beat it to the line.

That was the meanist sounding Subaru Engine I have ever heard.

If the photo doestn't show up just click this link.

http://us.f1.yahoofs.com/users/fecde...forT8ANkooEZkK

I wish I had the camera when it was racing. My uncle took this picture earlier that morning before it raced.

Brad

* Registered users of the site do not see these ads.

HndaTch627 · 11-23-2001, 01:44 PM

what mustang runs 7 seconds in the 1/4 and ISN'T a prostock car??

RageHardIntoTheBendies · 11-23-2001, 01:58 PM

Well I guess that proves the flat 6 can make good power, I have been dreaming of a Legacy wagin with a TecII controlled NA H6.

MY99 2.5GT · 11-23-2001, 02:03 PM

For one it was a Hi 7 and I was able to witness the fastest pro stock class in history plus a few records shattered.

Prostocks run 6s.

Brad

bsquare · 11-23-2001, 03:26 PM

Don't confuse the new H6 with the EJ33 in the SVX. The head design on the new engine is CRAP!

SubyTechMaster · 11-23-2001, 03:44 PM

What's wrong with the EZ30 head design? Just curious.

bsquare · 11-23-2001, 08:10 PM

3 cylinders, 1 exhaust port.

SubyTechMaster · 11-23-2001, 08:23 PM

And this automatically translates to bad flow? How many cylinders are exhausting at a given moment, in the engine let alone on one bank of the engine? How is this differant than a header that flows 3 into 1?

Could you be making a snap judgement? Based upon looks?

bsquare · 11-23-2001, 09:10 PM

Unless they are doing some REALLY fancy routing of the channels, the exhaust will travel a different distance from each cylinder and there is no way to compensate for this in the header. So, even though only one cylinder is firing at a time, the different length exhaust channels allow for the exhaust from different cylinders to interfere. I can assure you this head design costs a lot less than independent exhaust ports and the associated header.

Ben

HndaTch627 · 11-24-2001, 05:45 AM

ben...u da MAN!!!

Jeremy

11-23-2001, 01:34 PM	#1
MY99 2.5GT Scooby Specialist Member#: 5030 Join Date: Mar 2001 Chapter/Region: MAIC Location: Martinsburg, WV, USA Vehicle: 1999 Legacy 2.5GT 05 Legacy GT 06 Armada	Naturally Aspirated Subaru Pulls 7 Seconds In The 1/4!! About a month ago I went to the NHRA Keystone Nationals near reading PA and saw this 7 second Dragster equiped with a 3.3 litre SVX engine. This naturally aspirated engine was converted to use two 2-Barrell carbuerators and Hi Rise Intake Manifolds. I spoke with one of the racing team members about what they went through to modify this engine and what kind of power output they were getting. Not suprisingly he said everything had to be modified. It was bored out and running 13 or 14:1 (I don't remember exactly) compression. Suprisingly he said the stock crank was still in there?! They estimate it produces 400-500 hp. Unfortunitely is was up against a late model Mustang with a Big Block implanted inside. even with a pretty heft handicap the Mustang caught up and beat it to the line. That was the meanist sounding Subaru Engine I have ever heard. If the photo doestn't show up just click this link. http://us.f1.yahoofs.com/users/fecde...forT8ANkooEZkK I wish I had the camera when it was racing. My uncle took this picture earlier that morning before it raced. Brad * Registered users of the site do not see these ads. Last edited by MY99 2.5GT; 11-23-2001 at 01:40 PM.

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11-23-2001, 01:44 PM	#2
HndaTch627 Scooby Guru Member#: 6551 Join Date: May 2001 Chapter/Region: MWSOC Location: Carol Stream, IL Vehicle: '01 GC8 Dinged STM '09 Concours 14 ABS Black	what mustang runs 7 seconds in the 1/4 and ISN'T a prostock car??

11-23-2001, 01:58 PM	#3
RageHardIntoTheBendies Scooby Specialist Member#: 1532 Join Date: May 2000 Location: Wnnipeg, MB, Canada Vehicle: 1999 RS, Silverthorn www.zucru.com	Well I guess that proves the flat 6 can make good power, I have been dreaming of a Legacy wagin with a TecII controlled NA H6.

11-23-2001, 02:03 PM	#4
MY99 2.5GT Scooby Specialist Member#: 5030 Join Date: Mar 2001 Chapter/Region: MAIC Location: Martinsburg, WV, USA Vehicle: 1999 Legacy 2.5GT 05 Legacy GT 06 Armada	For one it was a Hi 7 and I was able to witness the fastest pro stock class in history plus a few records shattered. Prostocks run 6s. Brad

11-23-2001, 03:26 PM	#5
bsquare Scooby Specialist Member#: 1911 Join Date: Jul 2000 Location: Seattle, WA, USA Vehicle: 2000 Impreza 2.5RS Silverthorn Metallic	Don't confuse the new H6 with the EJ33 in the SVX. The head design on the new engine is CRAP!

11-23-2001, 03:44 PM	#6
SubyTechMaster Scooby Specialist Member#: 4423 Join Date: Feb 2001 Location: Placerville, CA USA Vehicle: '04 08 Tribeca, SVX Gold, Maroon	What's wrong with the EZ30 head design? Just curious.

11-23-2001, 08:10 PM	#7
bsquare Scooby Specialist Member#: 1911 Join Date: Jul 2000 Location: Seattle, WA, USA Vehicle: 2000 Impreza 2.5RS Silverthorn Metallic	3 cylinders, 1 exhaust port.

11-23-2001, 08:23 PM	#8
SubyTechMaster Scooby Specialist Member#: 4423 Join Date: Feb 2001 Location: Placerville, CA USA Vehicle: '04 08 Tribeca, SVX Gold, Maroon	And this automatically translates to bad flow? How many cylinders are exhausting at a given moment, in the engine let alone on one bank of the engine? How is this differant than a header that flows 3 into 1? Could you be making a snap judgement? Based upon looks?

11-23-2001, 09:10 PM	#9
bsquare Scooby Specialist Member#: 1911 Join Date: Jul 2000 Location: Seattle, WA, USA Vehicle: 2000 Impreza 2.5RS Silverthorn Metallic	Unless they are doing some REALLY fancy routing of the channels, the exhaust will travel a different distance from each cylinder and there is no way to compensate for this in the header. So, even though only one cylinder is firing at a time, the different length exhaust channels allow for the exhaust from different cylinders to interfere. I can assure you this head design costs a lot less than independent exhaust ports and the associated header. Ben

11-24-2001, 05:45 AM	#10
HndaTch627 Scooby Guru Member#: 6551 Join Date: May 2001 Chapter/Region: MWSOC Location: Carol Stream, IL Vehicle: '01 GC8 Dinged STM '09 Concours 14 ABS Black	ben...u da MAN!!! Jeremy