Ahh, I see. The DI fuel rail is built like a tank. I'm not worried.

Boost starts around 24 and fades to 17, or less if I rev high enough. With enough timing, HP stays flat close to 7k.

 

Nice. It is a well built fuel rail, it would just make me nervous. Guess we'll find out, won't we!

Surprised you aren't running more boost, honestly. GREAT numbers!

 

That's all the boost it has to give. I can phase the cams different and get more boost, but less power.

 

Gotcha. When you going back to the big turbo and E85

I wanna see it when that happens

 

nice times

 

I can't wait to get slicks. I bet 1.7 60' in a fwd is a head rush. Nice vid.

 

Have to test cams with this turbo first.

 

Meh, not so much. My other FWD pulls 1.3 sixties.

 

All about prospective I guess, when your coming from a best of a 2.1 on streets a 1.7 should be noticeable.

 

The Race Car? That thing is SICK!

 

Matt, how much advance are you running? I'm up to 25.5* 3k & up with no KR on 50% E

 

I think I am starting out around 24, but climbing to as much as 27.5 at higher RPMs.

 

The fuel rail will not blow up. High pressure systems are always designed with a high safety factor, to guarantee that the stress they see is always under the fatigue point of the material, or under the desired stress vs number of cycle a part has to achieve, depending of the material used. I engineer hydraulic cylinders used in everything from oil field to forestry equipments, and every hydraulic related parts are designed this way. The lower safety factor we use for critical parts is 3:1, most of the time it's higher. Going from 2200 psi to 2800 is not dangerous. If the rail was designed with such a low safety factor that a 25-30% in pressure could blow it up, they would crack all the time from simple things as variations in the raw materials to machining imperfections and would never last for the life of the car.

 

Hm I wonder if the rod bearings are going to like that much timing? I guess only time will tell because there are only a few who are running this much timing.

 

keep it up guys im excited to see the numbers you get with cams.

 

Without knock, I'd think you could run more timing yet and not worry about bearings. It's not as bad as running 20 degrees of timing on gas and always having some knock.

 

Well, I loaded the 2800 psi Trifecta base file, did a pull and still tripped the P0087 Low Fuel Rail pressure at 6300 rpm in third on a 75% ethanol fill. Granted I'm exceeding 350% air load with the MAF freq tables raped 27% positive to get enough fuel, but IDK how you do it unless the 4.45 axle takes enough load off. Running .90 PE lambda. Any input appreciated Matt.

 

+1 Near 7-7.5k I am also close to 27.5-28* timing on a 2.7" TVS. 80k+ miles on stock bottom end and still going strong.

 

It sounds like one of your pumps is not keeping up then.

 

Yep, but which one? Did you replace the in tank pump or are yours both stock?

 

Both stock. As I was saying earlier in the thread- you could read fuel pressure at the inlet of the mechanical pump to see if the in-tank pump is keeping up.

 

Ya, I worked very late last night so I haven't had a chance to look into the hardware needed to monitor it. I'll have to sort it out. Thanks for replying. I logged over 31 lb/min VE airflow in the midrange last night before it popped the CEL.

 

If you remove the valve core and then install one of these fittings, then you can use a 1/8" npt sensor. ZZP adapter

 

Shameless plug.

I found a sensor in HPT for fuel pressure, IDK which one it is though. I'll try and log it tonight to see.

 

Tom, I think thats the high pressure one. I tried logging it a while ago, but never did get it to work. So, purely speculation.