He is running 880cc Injectors. A Single Walbro Pump, Stock fuel rail and regulator. Almost every single person other than Joe, That we have built, runs 880's.
I know I explained this earlier, but it didn't sink in.
LET ME BE CLEAR...That is NOT a sarcastic comment. I'm serious I am going to explain again because some may not have understood the first time. I am not calling anyone stupid, because THIS is a productive and legitimate question.

The efficiency of this engine, with the combination of parts we designed and installed, is extremely high. Unlike what others have marketed before on this forum. I mentioned this in an earlier post I believe in the beginning of this thread. BSFC rates are at least 12% better and the engine as a whole makes great use of every ounce of air and fuel it processes. Now we mention again in the thread that it was immediately apparent he was out of fuel at 23psi. Meaning in the AEM Logs we saw 97% at 7200 rpm. It brought his total average AFR up. At peak torque we ran 11.1 AFR in third gear. By 7000 rpm it was climbing to 12.0. On pump fuel.
We only tested the car to 7000 on the dyno. At the track he started shifting at 7-7200. But he would run out of 4rth gear. Those runs were good for 11.1-11.3 at 125-128 MPH letting off in 4rth.
Also another reason I recommended running some race fuel to see if we could safely run anymore rpm to hit our goal of holding 4rth thru the traps.
I understand that it seems a bit much to believe but it is what we have been running for some time on many cars. If anything it should ADD credibility to the argument, because we were only running 880cc injectors. 23 psi is all the boost it would take safely in my eyes.
Timing is not conservative, but it isn't radical either. There is quite a bit left on the table. I would venture to say about 25-30 HP in timing alone with nothing but race fuel. But that's about it.

 

I have a customer car that we built that ran 10.71 at 127 @ 23psi with a crappy 1.72 60' on street tires.

Mods as follows:

AEM EMS
Standard BB 35R
Kelford 272 cams
stock head
stock tb
built 2.0L bottom end
1600cc/min injectors
1 walbro 255
E85 as fuel

Take that for what it is worth.

 

From my simplistic perspective, the more advance you run, the more complete of a fuel burn you will get? So if you are favoring timing over boost, you might have better efficiency in terms of fuel consumption?

Just a thought. Maybe I'm way off.

Oh and what parts are making this car efficient? The head design from HeadGames and what else if you don't mind me asking.

 

More advance does not mean anything. The right amount of advance is more like it. Every load and and rpm cell require a specific lead numerically. Just by saying more advance does not mean anything and it may do nothing. Fuel doesn't burn "more completely" by adding timing. You burn the air fuel charge completely when all the variables in the chamber are in harmony. We are not going to make this a theory thread, but suffice to say many factors go into making an efficient burn.
Again you heard one word and that is all you got from it. It is not just a cylinder head that came from fairy land. As I explained, and yet again you did not read the thread obviously, there are many factors. Some and not limited to are our Head Chamber and Port design that we developed with Headgames, DTM Cam profile, Piston design and dish volume, Quench area, Valve train, Turbo Manifold Design, and turbine efficiency.
Lets not forget TUNING!
On another note, you are assuming we are favoring timing over boost. THAT IS VERY FAR FROM THE TRUTH. If we could run more boost we would. Our theory on timing lead is not add a bunch and run low boost. That is ludicrous. Its probably as stupid as the people who think they can put race fuel in the car and it will magically sprout more WHP from the type R sticker on the trunk....

 

I appreciate your reply! Thank you for that.

I guess I had a simplistic perspective that a high boost low timing car will have a less efficient burn because you do see EGT's increase as timing is retarded. This tells me perhaps some energy is escaping as a by product as opposed to something of use. But I can't say I understand the intricacies of all the things like tumble and squish and what not.

Does the OP's customer car have custom DTM pistons and cams? Cool! Sorry I focused on the head. It was not intentional.

 

Hahaha, well said Nick.

 

this one time DTM tuned my car and now its fast

 

ease up, that's too much detail

 

Yes

 

Anothony's car is a monster, end of story...the trap proves everything.

 

the most obvious thing to me that would allow that kind of power at 23psi is high compression pistons + high octane fuel

 

Pistons are 9:1
Fuel has been discussed in uber amounts. He was running literally a full tank of fuel 8 gallons of 93 and the rest filled the tank with C16.

It seems to be very difficult for people to understand that there is ALOT more to building an engine that just "dropping" in pistons. For now I guess people will never be able to read between the lines. I have posted it in black and white thru this thread.

Amazing...

 

thank you sir....you will be there shortly.

regular 9:1 pistons and as Nick just stated (well he actually did about the pistons too) but it was 8 gal 93 and the rest c16. Not that hard to believe. Also have a driver mod with bald street tires.

 

There are quite a few more factors that would play into why this car runs so well for what it is. Head flow, cams, etc, etc. It's def. not all about what's in the bottom end. It is a very well built, and very well put together setup that works flawlessly.

 

Well you guys should deffo turn the boost up, run a 9 on pump, and then begin to rule the world of evo tuning. Damn impressive so far so keep it up.