Turbo builds

[Nicholas1996]

1.8 60ft??? That’s pretty good. What kinda tires?

[Mspir3d]

I took the car out to the 1/8 mile drag strip last night. The 1-2 shift is killing my time but hopefully a new transmission brace will make it faster. The track runs a little slow but my best trap was an even 104 mph. For comparison, a 2020 gt500 was trapping 96. I changed out the wastegate springs after racing, I hope they'll let me run more pressure. The car was only averaging 18 psi when I looked at the gauge.

[Nicholas1996]

From the Corvette forum, "a 10% increase in pressure results in a 5% increase in fuel flow at a given pulse width." Another member says it's a non linear increase. If that's true I would expect your duty cycle to drop a little with tuning.

If that’s the case I’ll push the turbo a little more. Would like to see where the 6266 stops with my 1.0AR

[Mspir3d]

From the Corvette forum, "a 10% increase in pressure results in a 5% increase in fuel flow at a given pulse width." Another member says it's a non linear increase. If that's true I would expect your duty cycle to drop a little with tuning.

[Nicholas1996]

Put the second pump in and base pressure went sky high (as expected) so I tried adjusting it down but regulator won’t go down far enough. Working on a solution to stage the pumps. I have a fore fc2 (should have bought the fc3 but didn’t anticipate to get this far lol). So this is for infinity based only people. Maybe somebody clever enough will come up for something on the stock dme. Anywho:
I plan on using hs0 on the infinity to trigger a relay. The relay will have power from one of the outputs for the pumps on the fc2 . Set the infinity to kick the relay on at say 18-20 psi. Figured I’d share how it’s going. Might put some more boost to it if I see the duty cycle drop on the injectors (doubtful).

[Nicholas1996]

That's fast. Are you running the stock exhaust? It sounds really quiet.

Bimmerworld 3.5 inch. Windows were up

[Mspir3d]

That's fast. Are you running the stock exhaust? It sounds really quiet.

[Nicholas1996]

4th gear pull https://youtu.be/e8i3DLIM6lY
3rd gear pull https://youtu.be/10JCUuRMWjQ

[Nicholas1996]

Hopefully I can get the car broken in and on a dyno with a rpm readout soon. It was down most of this week waiting for a new starter. I'm curious to see where it actually spools up. I wonder if a local fabrication shop could cut and weld an exhaust housing for you if you bring in your current one.

Maybe. My buddy has a shop and he’s willing to take a crack at it, but he’s never done one.

[Mspir3d]

Hopefully I can get the car broken in and on a dyno with a rpm readout soon. It was down most of this week waiting for a new starter. I'm curious to see where it actually spools up. I wonder if a local fabrication shop could cut and weld an exhaust housing for you if you bring in your current one.

[Nicholas1996]

I think maxpsi maxed their 6266 out at 26 psi on their run into the 9s. It was making 750 whp IIRC. I also found this regarding a/r: https://www.e46fanatics.com/threads/...ng-ar.1063132/ just sharing because I thought it was an interesting read.

That’s a good read. Yeah I don’t see the 6266 being able to handle too much more. I contacted max psi. They want to offer me a 6466, but they want to install and tune it. Don’t know why they can’t just sell me a turbo but anyways, Can’t happen as I live far away. Besides that I’d like to go with a Borg Warner of some sorts. But I hear it’s laggy. Decisions decisions

[Mspir3d]

No sir. But the duty cycle is %95 . I may dump another 525 lph in the tank ( I have a Dual hanger) and see what it does. At this point I’m not sure if there is going back. I’m thinking of getting as much fuel as I can into it and seeing what the 6266 does when really cranked to the max. It’s got a 1.0 AR housing so it should flow well enough.

I think maxpsi maxed their 6266 out at 26 psi on their run into the 9s. It was making 750 whp IIRC. I also found this regarding a/r: https://www.e46fanatics.com/threads/...ng-ar.1063132/ just sharing because I thought it was an interesting read.

[Nicholas1996]

Are you running a boost a pump?

No sir. But the duty cycle is %95 . I may dump another 525 lph in the tank ( I have a Dual hanger) and see what it does. At this point I’m not sure if there is going back. I’m thinking of getting as much fuel as I can into it and seeing what the 6266 does when really cranked to the max. It’s got a 1.0 AR housing so it should flow well enough.

[Mspir3d]

Excited to see what yours puts down. Was going to to go do some road tuning on mine tonight but the weather looks bad.

Edit: went out and did some tuning. Set up boost by gear. Ran out of fuel at 24ish psi on my 1100cc injectors. Car is fun for sure

Are you running a boost a pump?

[Nicholas1996]

That's really good. Have you got on a dyno with it yet? You must be running some sticky tires. My firehawks grip well at 9-10 psi, but into the 20 psi range it will spin them above 90mph.

Just some Kumho ecsta ps91. Nothing crazy. Once they’re warm they do Ok