Lookin awesome Tom!

 

I Never do a 2500-7500 pull in 4th or 5th otherwise u guys will be catching my engine parts as they fall out of the sky. Lol.

 

Double pumper.

 

Obviously If I ran a double pumper I could definitely see more power. But my stock block is my main hang up. I don't want to push my block anymore than I already am. My modded Wally is getting me the power I want and "safely". Basically the way I see it - Built Block = Double Pumper. Some people say Double Pumper when a single pump can work just as Well.

 

Just don't get into a gear higher than 3rd.

 

Why Cause I don't have a double Pumper?

 

I know not to go wot in 4th or 5th at low rpm and put a huge load on the engine. But if I'm on the interstate going 70and I'm in 4th my rpms are high enough but I still wouldn't stab it. Id let it get into boost first.

 

You're welcome.

Ya FP kicks ***.

The car is set to run less or equal boost in 4th and 5th, (ecuboost). it doesn't even go that lean in those gears. Even if he trys to load it up in 4-5th he wont see the same boost pressure as he does in 3rd because of how i have the car tuned.

i could run the same boost pressure in 4th and 5th also and it would be the same afr in 3rd at higher rpm. there is nothing special about 4th and 5th gear, other then if you start to low of an rpm and load the car up, it will spool sooner creating more torque downlow. as long as the same boost pressure is ran in those gears, you get the same afr. the length of the gear has absolutely nothing to do with afr at higher rpm's going lean. just because the gears longer, doesn't mean the afr is going to go leaner. you're looking at it the wrong way. the turbo can only produce so much cfm/airflow, it is not going to defy its physics just because the gears longer.

other then that, you would have a hard time hurting this car with the tune i have on it. its running less boost downlow then it is set to go up past 6k+ introducing the additional HP.

With one i can make more power yes. without knowing shaft speeds i cant throw more boost at the car safely, but there is atleast 1-2psi more to be had for another 20whp based on how the car responded with 32psi.

We got the afr into the low 12's though, which is more then safe for e85. technically he can be fine the way it is, but it should have a double pumper i agree. The modded walbro is completely maxed out right now around 520whp. the only reason it is even able to go that high, is because of the 1450cc inj and the fact we can run ethanol leaner then average.

his next mod should most definitely be a double pumper. i sell a lot of buschur double pumpers to my customers, and never have complaints and it is a very good easy drop in solution.

 

The car is set to run less or equal boost in 4th and 5th, (ecuboost). it doesn't even go that lean in those gears. Even if he trys to load it up in 4-5th he wont see the same boost pressure as he does in 3rd because of how i have the car tuned.

i could run the same boost pressure in 4th and 5th also and it would be the same afr in 3rd at higher rpm. there is nothing special about 4th and 5th gear, other then if you start to low of an rpm and load the car up, it will spool sooner creating more torque downlow. as long as the same boost pressure is ran in those gears, you get the same afr. the length of the gear has absolutely nothing to do with afr at higher rpm's going lean. just because the gears longer, doesn't mean the afr is going to go leaner. you're looking at it the wrong way. the turbo can only produce so much cfm/airflow, it is not going to defy its physics just because the gears longer.

other then that, you would have a hard time hurting this car with the tune i have on it. its running less boost downlow then it is set to go up past 6k+ introducing the additional HP.



Tom I have always noticed that my car tends richen up as I go thru the gears for instance 3rd - 11.5-11.8 afr ,4th - 11.3-11.6 afr and 5th 10.8- 11.2 afr . I guess its better then leaning out, but why does it do this?

 

thats tune related. the fuel map must be tracing different values as your load increases/decreases.

this car is going to get detuned i think. just waiting on what mrfred says about the questions i just asked him regarding fuel pressure.

so that said, it does need a double pumper as you originally posted.

 

When you run e85 does the same apply as in 1 psi of fuel pressure per # of boost? If so then if you had a fuel pressure gauge and it was increasing correctly with boost then you could say the pumps supporting the power right? I know what your driving at though there would be no safety margin. Would running a pump at its limit make it prematurely fail?

 

well we get a pressure signal from direct boost pressure since a vacuum line goes to the fuel pressure regulator, making it rise 1:1 with boost using the 43.5psi as the base pressure on the stock FPR. so 1psi would be 44.5psi and so forth.

so once the pump cant keep up with the boost being ran, ya it will drop below the 1:1 and you will go lean.

ya im trying to find out if what i think mrfred said is correct, if so then its not something i want my customers cars doing, that's just to risky. fueling to the engine is not something you want to be playing with! i definitely don't want to downgrade the ability of the injectors with providing them with lesser then average pressure.

 

The fact that the car goes so much leaner in such a short period of time in 3rg gear scares me, you may understand why an old school guy like me would think when a car is running out of gas that the longer you're into it in a higher gear the leaner it might get.

 

so a carb engine or something older would keep going leaner you're saying? i have absolutely no experience with the older engines, so i wouldnt know.

he will have a buschur double pumper in his car by tomorrow i think, so we will post the new results with plenty of fuel this time.

 

^^I'm interested in seeing wat he puts down, maybe I can gauge a little off his of wat mine will put down