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Old 02-05-2005, 07:43 PM   #1
Kevin Thomas
Street Racing Instructor
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Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default RX Turbo Stock vs TechWorks Dyno Results

Hello All,

Car: 1988 RX Turbo (Manual/FT4WD)
Mods: 'Stock'
Autozone Cone Filter

Mods: Now
K&N Cone Filter
Garner Pulley
Spearco Top Mount Intercooler
Techworks Header
GT17 Ball Bearing Turbocharger
Techworks Downpipe
2.5" Cat, 2.5" Custom exhaust, 2.5" Flowmaster
Ebay Manual Boost Controller


I did 3 runs only. No tuning! Boost was set at 9-10psi. Stock boost was between 8-9psi.

Here is a dyno chart of the 3 runs I did.




This next dyno chart is a comparison of my stock baseline horsepower run vs the TechWorks run I did today.

A gain of 34.16hp around the same boost psi. Not bad!



Now lets take a look at the torque graph.

A gain of 26.47lb-ft of torque at about the same boost pressure.



After I get a RRFPR (Rising Rate Fuel Pressure Regulator), an EGT (Exhaust Gas Temperature) gauge, a fuel pressure gauge and my fuel injectors cleaned, it's time to up the boost. Better have an extra clutch and flywheel ready. More pics to follow of car in shop. Enjoy!
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Last edited by Kevin Thomas; 02-09-2005 at 07:41 PM.
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Old 02-09-2005, 12:19 PM   #2
Diz
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Chapter/Region: RMIC
Location: Colorado Mountains
Vehicle:
2004 Porsche 911
2004 Mazdaspeed MX-5

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Congrats on the great improvement. Any plans on running a custom IC, or would that be overkill with your turbo?

It will be cool to see how much power you can pull out of the EA series. Cheers.
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Old 02-09-2005, 06:48 PM   #3
Matt Monson
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Location: Teh Ghetto Garage, CO
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'73 914 and 2012 BRZ

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Nice work Kevin...
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Old 02-09-2005, 07:40 PM   #4
Kevin Thomas
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Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default

Quote:
Originally Posted by Diz
Congrats on the great improvement. Any plans on running a custom IC, or would that be overkill with your turbo?

It will be cool to see how much power you can pull out of the EA series. Cheers.
I'm an idiot! I forgot to include the intercooler in the mods section. I'm using the intercooler that was used in the Ludespeed Stage II cars. It's a Spearco unit. It was scavenged off of my Outback Sport after turning it back N/A. I was told it's not going to really come into play until I up the boost from stock though. I can't wait. The car is still slow though.








Hey, glad to see some 'old heads' in here.

Last edited by Kevin Thomas; 02-09-2005 at 07:53 PM.
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Old 02-10-2005, 10:20 AM   #5
Diz
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2004 Mazdaspeed MX-5

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Quote:
Originally Posted by Kevin Thomas
Hey, glad to see some 'old heads' in here.
Heck yeah. I didn't know you took the OBS back to NA. Say it isn't so. That car was my inspiration for the turbo kit on my RS.
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Old 02-10-2005, 06:56 PM   #6
Kevin Thomas
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Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

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Quote:
Originally Posted by Diz
Heck yeah. I didn't know you took the OBS back to NA. Say it isn't so. That car was my inspiration for the turbo kit on my RS.
It is so! Cool to be an inspriation though. I chickened out with turboing that car after the installation of the Ludespeed kit went bad. I thought I found my stock ECU while moving to a new house (it was lost for a couple of years, don't ask...I was using a Legacy ECU). Little did I know it was a 2.5RS DOHC ECU. The OBS DOES NOT like that ECU. Never has! Oops! Headgasket go BOOM!

It's running great N/A now though.

So.......you are turbocharged eh? I'm going to look up your name in the Aftermarket turbo forum and read up on your project.
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Old 02-10-2005, 07:18 PM   #7
Diz
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2004 Mazdaspeed MX-5

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Quote:
Originally Posted by Kevin Thomas
So.......you are turbocharged eh?
Well, sorta. I ran a JC kit on my 99 RS way back when. I parted & sold the car (mistake) in 2001.

Presently, we have two turbo Scoobies in the house - my 04 STi & the fiancee's 02 WRX wagon. My 94 wagon is all motor. Matt helped me with the motor build & provided space in the ghetto garage for some time while the project progressed. The motor is a phase I EJ25 shortblock mated to EJ22 heads. We put a set of Delta cams in there, too. There's plenty more going on in there, but I don't want to hijack your thread. Cheers.
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Old 02-10-2005, 09:54 PM   #8
Scoobie Steve
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Subaru L Ver 6 STi Type R

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Wooo watch those air/fuel ratios, very lean at 3k. You need to get the spool up area alot richer. Might slow spool a bit but will be much safer. Any knock? MAF or flapper door?
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Old 02-11-2005, 11:13 AM   #9
avatar382
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Baby Blue

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Why would he be so lean at spool up, but not up near redline? Does it take that long for the ECU to get more fuel in? Geez, 18:1 that's nuts...

Still looks pretty lean stock. I thought the ideal was 12:1?

Assuming he has a flapper, how do ya go about getting the more fuel in that part of the powerband, anyway?

Man I need to get my own ride dyno'ed, just to see how my EA82 matches up with Kev's and WJM's.... I think there's only 1 4WD dyno in south florida and it's ridiculously expensive
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Old 02-11-2005, 07:58 PM   #10
Scoobie Steve
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Subaru L Ver 6 STi Type R

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The flapper door can be disected and modified. Biggest problem with the flapper door is it getting stuck and not swinging freely. 18:1 while not under power is ok, the 15:1 at 3K is dangerous, like you said ideal is around 12:1

Ya get that car on the dyno, I was very surprised with WJM's dyno....
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Old 02-11-2005, 11:33 PM   #11
Kevin Thomas
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Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default

Quote:
Originally Posted by Scoobie Steve
Wooo watch those air/fuel ratios, very lean at 3k. You need to get the spool up area alot richer. Might slow spool a bit but will be much safer. Any knock? MAF or flapper door?
Yeah, I'm working on my air/fuel ratio. I noticed that also. The car has a Maf sensor.

I purchased a RRFPR and am currently trying to install it. I was tuning up the car tonight (new ignitor, disty/rotor, spark plugs and spark plug wires). Hopefully I'll have the RRFPR in and all the tune up stuff done by weekend's end. Then I need to send the fuel injectors out to RC Engineering to be cleaned/balanced. After this, I'll play with fueling (air/fuel ratios) to get down to 11.5 - 12.0:1 and then start cranking up the boost.

I'm shocked I didn't hear any detonation or pinging. It doesn't mean it wasn't taking place. Rust spots throughout the car so perhaps my knock sensor is teh rustay. The dyno doesn't show any drops in power though so good thing.

Last edited by Kevin Thomas; 02-11-2005 at 11:40 PM.
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