So if none of you followed my build thread, basically in Sept 2009 I picked up a FD with 69K on the body and a blown motor and was going to label it my project car. Fast forward 2 years later, the project is running strong. Streetported, single turbo, fueling, supporting mods, etc. I feel like everything is done. What do I do now? haha.

I can get coilovers and wheels but I don't quite know what other things I can do to the car.

Have you ever reached that point? And if so, what do you do to satisfy your urge to "toy" with the car?

 

buy driving lessons and go racing!

 

you know possess a musical instrument.

play it.

(post 2).

warning... tracking is addictive

howard

 

I've never considered myself done. Continual tweaking to be done, with the goal of going as fast as possible around the road race course while still keeping the car streetable

 

Op, did you ever end up making decent power? Going off memory yourcar was way down in power? Sorry if I missed something where you got it resolved

 

Hey in regards to the power, I posted my results after Steve came back to tune the car for water injection.

Here it is from my build thread:

This past weekend, Steve Kan flew in again and tuned my car. I hadn't changed much with the car since the last tune. Maybe put on 300 miles on the motor, installed brand new OEM manifold gaskets and got my water injection working.

The final numbers ended up being 406rwhp/325rwtq @ around 18-19psi. An increase of 62rwhp/56rwtq and 2-3psi.

I am pretty happy with the numbers, but in comparing my setup with Rich (we basically have the same exact setups) he is almost 90rwhp more than my setup.

I'm trying to figure out where the bottlenecks of my setup are in stealing power away.

Future things I need to improve:
1. Rewire my fuel pump. Steve said that I am at about 87% duty cycle
2. Order thicker coupers/better clamps/flare IC piping. During the pulls the coupler was blowing off because the IC piping had no flare to clamp to
3. Think about possibly running 50/50 water and meth setup for next tune.

Haven't been able to feel what the extra 60rwhp feels like as it was raining during the day of my tune and I was already breaking loose in 3rd gear just casually driving over to the tune.

I'm excited for some sun!

This is showing two results.

Blue is when Steve came in January to tune the car @ 16PSI
Red is the most recent tune @ 19psi with water injection




I do note that when I go WOT, my boost will spike around 19-20PSI and hold 18 with AFR sitting around 10:1 range so it is running pretty rich with the water injection. I don't think it would result in the 90rwhp difference though between Rich and I's setup. I don't quite know what could be robbing the setup of power but as I've always stated in my build thread, I rather have a safe setup (running rich) than pushing the HP limits.

 

Can you give a rundown on your mods as they relate to power? ie exhaust setup, ignition, IC, etc. Also the particulars of your engine. Would help to narrow things down..... I made around 430 at 15 psi IIRC. I also made 390 at 15 psi with non-seq BNRs many years ago, and the 500R pulls much harder at similar boost levels.

 

Well that is an improvement but you have to be losing boost somewhere. I know you are seeing 18-19psi but you have to have some leaks somewhere.

I have a local customer with the same kit who made 43Xrwhp at 15psi, I would spend time figuring out the issue. Still a 400rwhp FD isnt bad by any stretch, it would just bother me knowing that my power is off by about 20%.

Edit: Rich beat me to it.

 

Mods list as wanted. I don't think I'm missing anything.

2 Rotor Streetported Atkin seals 2mm Engine - Built by Howard Coleman
Unorthodox Pulley Set
A-Spec 500R T4 Turbo
A-Spec Stainless Manifold
Ceramic Coated Upper and Lower Intake Manifolds
Greddy Type-RS BOV
Tial 44mm Wastegate
RE-A Dual-Tip Cat-Back Exhaust System
A-Spec Down Pipe
A-Spec Mid Pipe
RX-7Store V-Mount Intercooler Kit + Modified KOYO Radiator
Coolingmist Trunk mount water/meth injection kit - Just running water
Apexi PowerFC and Commander
Greddy Throttlebody Elbow
FDNewbie Import Dual Oil Coolers w/ Black Setrab Cores
Supra TT fuel pump
Image Dynamics 725CC primary, 2000CC secondary injectors.
HKS Twin Power
B10EGV Sparkplugs all around
Garfinkle Oilpan Brace
Exedy Clutch/flywheel
AEM Digital UEGO Air/Fuel Wideband Gauge
AEM Digital Tru Boost Gauge/Boost Controller
AEM Digital Fuel Pressure Gauge
AEM Digital Oil Pressure Gauge
AEM Digital Oil Temperature Gauge

 

Is there any chance your clutch is slipping or anything else strange? I'm sure it's nothing, but you could always try running a Resistor 10 heat range plug and see if it makes a difference at all. Some believe the non-resistor plugs can cause EMI, but who knows for sure. Otherwise, a compression test and intake leak-testing would be where I would look, maybe check the pressure drop across the FMIC. Not sure what kind of cores RXstore use...

Regardless, as long as you're happy with how the car is currently, forget about it and just enjoy it. Start doing some Road Racing or Drag Racing and go chase some numbers!

 

let's asume you are running 11 to 1 AFR.

406 rotary rwhp is 780 CFM or 53.9 call it 54 pounds of air per minute.

if you are at a 11 to 1 ratio that means you are using 4.909 pounds of fuel per minute.

4.909/6.35 = .773 gallons per minute or..... 2926 CC/Minute

you have 2 725 primary and 2 2000 secondary for a total of 5450 deliverability.

2926/5450 = 53.6% injector duty cycle.

yet you indicate you were at 87%

if you were at 87% you would be delivering 4741 cc/min.

4741 cc/min is 1.252 gallons per minute or 7.95 pounds per minute.

at 11 to 1 AFR that would be 87.45 pounds of air per minute.

87.45 pounds of air per minute is 659 rotary rwhp.

granted your dyno sheet shows you quite rich at 10.5 AFR around 5000 rpm but it does come around nicely as RPM increases into the 11s.

water injection using 400 CC/Min does cost 6% hp...

i think there may be a setup error w your injectors as to duty cycle.

how do your lead plugs look after a run? they should be light brown. not black, not oily.

warm your engine and do a run, shut it off immediately and pull a lead plug. it should be dry and light brown.

howard

 

hey Brian, i am up at Beyond Redline and talked to Luke about the injector duty cycle problem. he thought most probable is fuel pressure loss. i recommend you purchase a 0-100 pressure sensor and screw it into the port on your fuel pressure regulator. while many have a small analog guage at this port to set pressure at idle it offers no help at 17 psi and 7500........ when you really need it.

and we all need to know up top.

you then log it in your Datalogit. it may help solve your problem and maybe save a motor. instrumentation is cheap, pays huge dividends and makes up for genius.

if you find fall off in pressure, it could be a number of easily isolatable things including a leaky FPR.

good luck,

howard

 

How many miles do you have on the setup? I think your engine isn't broken in, still.

 

I had a new supra pump that would cause me problems resulting in fuel pressure dropping out (ending up blowing a motor too!). I ended up swapping the unit and the issue was resolved.

 

If you are running low 10:1 A/F then you would pick up a lot of power leaning it out to mid 11's. At 18lbs of boost you should be high 400 RWHP.

 

The motor now has 1,087 miles on it.

 

Did you do the boost leak test several people recommended in your previous threads? I dont remember you posting if you had or not.