TCD 325i Turbo Dyno Results

[STS]

Also, Alex, the difference between cast and forged pistons is not one of thermal capacity (assuming same alloy) rather a structural one. Cast pistons have a crystaline structure while forging produces a "graining" of the metal... similar to wood grain and adds strength. Sometimes what people refer to as melting of a piston is more of an errosion of the metal..... neither one is really good ;o)

[diegom6]

Here they are. It's ugly but not bad for the first time out. The engine falls flat on it's face from 4500-5000rpm.

MMM, the same problem is happening in my case...I just don't feel good in those <RPM range the engine when I'm at full TB but if I'm at 3/4 of pedal the engine runs better...

[skat 325is]

w00t!!! nice numbers, thats what i was pretty much expecting out of 12psi...around 250 - 275hp.

[SlammedE30]

Here they are. It's ugly but not bad for the first time out. The engine falls flat on it's face from 4500-5000rpm.

MMM, the same problem is happening in my case...I just don't feel good in those <RPM range the engine when I'm at full TB but if I'm at 3/4 of pedal the engine runs better...

That would be detonation, turn down the boost, or turn back the ignition if you don't want to toast another motor.
-Ted

[diegom6]

Here they are. It's ugly but not bad for the first time out. The engine falls flat on it's face from 4500-5000rpm.

MMM, the same problem is happening in my case...I just don't feel good in those <RPM range the engine when I'm at full TB but if I'm at 3/4 of pedal the engine runs better...

That would be detonation, turn down the boost, or turn back the ignition if you don't want to toast another motor.
-Ted

I will retard just one grade for security, but I'm not hearing ping or knock noise... I just turned up the Boost to 10 PSI for some runs...WOW!!! this engine has a lot of potential runing 10 PSI only....I will drop soon my 26.5LB/H injectors, from my current 21LB/h...

[Dan Pinder]

What are you running for fuel turbo owners?

I am installing my turbo next weekend.

I'm running about 9-10 psi with a 255lph warboro pump and 24lb injectors with a 6:1 rrfpr.

By my calculations at 9 psi, this is the maximum boost that I can run with my fuel setup and this is the best fuel disk to use.

Fuel Pressure Required 80 psi
Fuel Flow Required 39 gph 149.66 l/h
FPR Ratio Needed 5 :1 *using 6:1*


So what are you doing to run 12psi? What FMU ratio, pump, and which injectors?

What is your base fuel pressure? ECU?

I'd love to run 12-15psi but I think I need much larger injectors, a huge pump, and a piggy back fuel computer.

Thoughts? Power needs fuel.

[skat 325is]

These little guys decided to pop out of the mail today :twisted:




4 pintals baby



Im runing a Federal Mogul fuel pump, it flows more than the msd fuel pump. I'll be ditching the mustang injectors and replacing them with the above, acompanied with a 12:1 Paxton FMU.

[Dan Pinder]

Yet still no specific details. Come on guys! :D

[skat 325is]

Yet still no specific details. Come on guys! :D

LOL i'll try to list what i have...

New Valve Seals
O-Ringed Head
New Timing Belt \ Tensioner
Oversized Head Gasket
New Piston Rings
Stock Head Bolts (Torx)
Smt6 Unit
Paxton 12:1 FMU
Federal Mogul Fuel Pump (loud mofo)
S52 Injectors (23lbs \ 250cc)
T04b .60 Intake .58 Exhaust P-Trim
Turbonetics Deltagate II wastegate
Custom Manifold (should be complete tommorow)
Gredy Full Auto Turbo Timer
Blitz Dual Solenoid Electronic Boost Controller
Fuel Pressure Gauge, Oil Pressure Gauge, A/F Gauge, Boost Gauge, Manifold Temp Gauge (Pyrometer)
Blitz Super Sequential Blow-Off

[TCD]

24lb injectors
BEGI FMU
Stock ECU

[Dan Pinder]

12:1 ? How can you use that?

What pump are you using?

At 12psi that is 342psi

There is no way man.

Shouldn't you have something like a 6:1?

fuel pumps generally deliver LESS fuel the higher the fuel pressure is. running too high of a fuel pressure would make a bad mixture

[skat 325is]

No, 12:1 @ 12psi of boost = 144psi of fuel

Friend of mine used my FMU on his turboed M42 @ 15 psi without problems

[Dan Pinder]

My bad, but at 144psi of fuel there is no way you are pushing 50gph.. which is required for 300hp.

right?

[matt325is]

I have:

Megasquirt fuel management
Ireland Engineering AFPR
32lb/hr injectors
255l/hr Walbro pump

I'm going to look at the fuel pressure guage while driving, to see what ratio it is.

matt

[TCD]

We have determined that the two dips in the graph are due to two ignition misses that I heard at the dyno and can feel inside the car while driving. I ordered a new ignition cap, rotor and 8mm wires yesterday. If this solves the problem we'll dyno the car again next week and take it to the drapstrip next weekend.
Todd