80-CU.IN.T

This is a double post. I accidentlly posted the original in the 3rd Gen section.

Horsepower - 379 @ 7000RPM
Torque - 309 @ 5700RPM

13B - Large street port / Rotary Power / 3mm seal
Intake manifold - pinned, ported, polished and Extrude honed
Apex'i RX6 turbo - Exhaust turbine housing ported / extrude honed
Computer - PFC / Commander
TiAl 46 mm Wastegate - Green spring suppose to be 11psig but was between 13 - 15psig
TiAl BOV
No boost control because of wastegate spring pressure
Fuel pump - Large Denso - Don't know GPH with my fuel tube size.
Stock fuel pressure regulator
Injectors - 550cc primary - 1300cc secondary
Stock ignition
Exhaust - 3" W/ 2 mufflers ( SR Motor sports )
Apex'i GTR Intercooler - W/ 2 ½" tubing
Oil metering pump ( REMOVED )
Secondary throttle plates removed
Oil - Royal Purple 5 - 30WT ( will be changing to 10 - 40 ) oil pressure is too low for a oil cooled turbo
Gas 91 octane With Two stroke oil additive
Spark plugs - HKS Iridium Racing R525RE

I don't have a scanner but I will post my Dyno sheet later with some picks if I can figure out how to.

XS Engineering performed the Dyno session.( I was pleased with their work and recommend them to anyone else.) I am very disappointed with my results so far though. Peak boost was around 15 lbs and jumped between 13 and 15 leveling off at 14 at 7000RPM. This is what I was told. My ignition started to miss fire at around 6700RPM. I need about 12% - 15% more HP. I can get 5% easy but I have no idea how to get the other 7 - 10 without making some major changes. The torque curve is very flat and the HP very linear. This car should be very easy to drive at the limit.

The first thing XS said was that my intercooler pipes were too small ( 3" ) minimum ( Mine 2 ½" )and they didn't like my exhaust. They said 3 ½" minimum. ( Mine 3" ) Lastly they complained about my wastegate dump pipe being plumbed back into my down pipe. They have seen a lost of up to ( 27HP ) because of this. They have a Hell of a lot more experience than I do and I have no reason to doubt them. This was a very good learning curve for me so I hope whoever reads this ( LEARN FROM MY MISTAKES ). That is why I am typing this long and drawn out passage.

XS also kick my out of their shop ( POLITELY ) about 10 times and would not let me perform any maintenance on my vehicle or be involved in the dyno session. ( I had to stand outside) I can understand. I have been in their shoes where you have a customer peering over your shoulder and asking questions when you are trying to work. ( I hate that ) Also they probably get a lot of ( YAHOOS ) in there. Unfortunately, that was most likely me. XS also fixed a few problems. All my very nice expensive hose clamps leaked on my intercooler lines and I put my throttle body gasket in backwards ( DUH ) big leak. I wondered why it was hard to adjust the idle. It stile leaks. I need a new gasket now. Lastly the flange for my BOV warped because too much heat was put into it during welding. I told them to silicone it for the Dyno session.

Originally I removed my Apex'i wastegate and replaced it with a 46mm TiAl Plumbed into my down pipe. (My friend blew up his Honda because of the Apex'i wastegate sticking) I put about 800 miles on my motor and the day before my dyno I got on it hard to see boost pressure ( Pressure jumped to 17lbs by around 3500RPM) I think it was less than that but I got out of it as quickly as I could. Scared the **** out of me because my fuel settings were VERY far off. I rushed out and bought a Big Green Spring = 11PSIG supposedly. The springs that were in it were a big blue and small yellow. I have no idea what that pressure works out to. I couldn't run any type of boost control because of this so no more testing could be performed. The big green sping in my setup gave beween 13 - 15 PSIG. I am out of time I gota go.

JBC

Do you have the Stock Cat?

I would be pleased with those results unless you have a midpipe or high flow cat.

80-CU.IN.T

SR - midpipe

94SR2

Not Bad, But do you know at exactly what boost pressure you're running? What Did the Power FC record that as?

I had a dyno run at KDR a couple of days ago with a re-tune of a junk map that I paided extra for at SR motorsports. Since my boost controller went all my tuning was done at spring pressure which the PowerFC recorded as .78 kg/cm^2 whicj is almost 11psi. Just to show you that a lot of people don't know what they're doing my first run: 318rwhp@11psi...
By the time Dave was finished 350@11psi...
and I was right there with him during the tuning (unlike your experience with XS) for him to show that the map I had paid for was way to rich in low end and way to lean on the high end. Also, there were several correction factors which were set wrong or not even changed from the base map.

Prior to this last tune @KDR, which I trust, I had a quick run at SPI's place and laid down 387@15psi (with the bad map) when my boost controller was working. Going by what Dave had said, he definitely thinks the car is well over 400hp at 17-18psi with good tuning (since you average about 10-15hp per psi of boost).

A lot of people give the RX6 crap as **** turbo or not capable 400+rwhp setup. I think it 's very capable as well as awesome for the street (better than my non-seq twins) as always it's all in the tuning. I should have some dyno sheets to post in a week or two when I return for my high boost runs.

now if I could only get my money back for those **** maps...

1FooknTiteFD

Hey SR where did you get the RX6B? The one they sell in the US is the RX6A with the puny exhaust side but the B has a bigger one

94SR2

Japan, it was used and part of an incomplete kit. Had to fab some stuff.

80-CU.IN.T

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I was right there with him during the tuning (unlike your experience with XS) for him to show that the map I had paid for was way to rich in low end and way to lean on the high end. Also, there were several correction factors which were set wrong or not even changed from the base map
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I was right there with him during the tuning (unlike your experience with XS) for him to show that the map I had paid for was way to rich in low end and way to lean on the high end. Also, there were several correction factors which were set wrong or not even changed from the base map

94SR2 - Thanks for your input. I plan to run some type of electronic boost control, MSD ignition and water injection. Unfortunately my funds are very tight now. I will be playing with some other things in the meantime

80-CU.IN.T

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I was right there with him during the tuning (unlike your experience with XS) for him to show that the map I had paid for was way to rich in low end and way to lean on the high end. Also, there were several correction factors which were set wrong or not even changed from the base map
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WTF I am too sick to be typing. Sorry for the confusion of the previous post and thanks for the input But like I said I am happy with XS. It is a liability for them to have me in their shop. They have no idea what is inside of a customers car or the quality of work. I have seen clutch assemblies let go at 8000 + RPM and almost cut the car in half. Pieces were found 150 FT. away. Thank god the driver wasn't hurt. I saw a intake manifold go through a steel hood and go about 50 ft in the air. Solenoid valve stuck open on a N2O system when the car was parked. When the owner fired it up BOOM. If a customer is hurt in their shop during a dyno they could lose their business. I am 41 and been around the block a few times. Unfortunately its has been a while and am glad that I am back.

94SR2

80-CU.IN.T,

I hope you manage to work out your issues with XS and your car. Like I said it's all in the tuning. Boost control, ignition, exhaust, etc. are all part of the 400+hp bench mark with these cars don't skimp on any of these.

XS like, most shops have rules for good reasons. Dave was liberal with me since I run a shop as well and do business with him. However, I was at a HP shoot-out several years ago, when a car broke free from a Dyno and smashed into a parked car injuring it's passenger....**** happens.


-Ed

Astro

huh?
i've never heard that before!
I sure hope thats not the case...i'd like to plumb my wastegate into the dp to keep things quiet once i sintall my stuff!

94SR2

I've seen it happen in a few cases...My Dad's old 930 turbo with the custom K27s had some problems with this.
Basically what happens is that the two pressure fronts fight each other and cause a restriction with the back pressure going in the opposite direction.

vosko

iTrader: (4)

350rwhp ain't bad.... my T78 made 352rwhp @9psi

94SR2

Yeah, I was happy with dave's tuning. He said it's been a while since he's had such a strong 10 psi run.
Now, I've been going nuts trying to get a replacement stepper motor for my boost controller so I can get back there for some more runs.
Gotta get it running strong for RX7 vs. Supra day @ atco if it's possible.

vosko

iTrader: (4)

rx7 vs supra day is now the 24th. if you can't find that why not run a home depot racing bleed valve or you could get a real manual boost controller

94SR2

It's now looking bad for me for the 24th-****!. Borrowed a stepper motor from a friend to get my boost controller working and now I'm running out of fuel @ 15psi with my new map. I've already pulled my 550 injectors and I'm sending them out today USP red to RCeng but It doesn't look like I'll get them back in time for re-tune and run @atco.
Anybody have stock 550s sitting around to sell to me? Maybe I can do some low boost passes.



-Ed

vosko

iTrader: (4)

i'm pretty sure judge ito does! his # is 973-703-9701 give him a call. ask for ito.