New Dyno numbers, Need Help

[Cschafer]

well not exactly what I was hopeing for but the truck is still together so I guess I can smile.

1st run fuel only 356hp 753 ft lbs. Boost hit 55lbs ran great, never cleared up the smoke.

2nd run fuel only, couple less hp didn't brake it to help spool. 352/740

3rd run 1 stage, wastegate set to dump at 30lbs hit 57lbs made 424hp 900 ft lbs

4th run 2 stages, pegged 60lb guage, made 487hp 1005 ft lbs before poping the fuse for the fuel pump at 2550 rpms might of cliped 500 but barely. Smoke cleaned up pretty good but still had some left.

So now what's the problem, I have huge amounts of air 55lbs on a low,low drive pressure turbo and huge amounts of fuel that is still not being burnt. I'm gonna guess the timing is the problem not giving the mixture time to burn. That and it's the only thing I have yet to do.

Oh well it was fun all the remus boys did well, Adam Cornell uped his record to 1374hp, Kevin Chaffey hit 908 and a monster vp truck they just built hit 651 with single turbo on fuel.

I'll get some pics and videos up as soon as I figure it out, if anyone can help with that pm me.

[Cschafer]

Here's the graphs and the video of the nitrous runs. The fuel runs are the youtube link.







http://www.youtube.com/watch?v=teOp5W7adm4

[JQmile]

You're still on the 12mm pump right? Good numbers even though I know ya wanted more on fuel. Nitrous does make your drive pressures go nuts, what kind of housing you running on the turbo?

[Cschafer]

The ex. housing is the 14cm standard to the 66/74 silver bulit. I think the one they put on the bullit has a little bigger internal gates I think they are around 20mm each. I don't have a drive pressure guage but I think the nitrous setup worked pretty good with the external gate. Could use another stage but I was happy with that. Yes it's still a 12mm pump.

I turned the timing up as far as it would go, I'd say about 3/16ths. It seemed to run smoother and I lost about 3-4 psi boost. My egt's also got better, I could run all the way through fourth and up to about 100 in fith before it would hit 1500deg. Before I could burry it in one gear, even third.

The more I drive it with this turbo the more I like my 62. I'm almost positive it had more power with the smaller charger. Looking at my dyno graph the power comes in 15-20mph sooner with the 62 and it sure raises faster. Hopefully I can get it rebuilt and get it back on the dyno here in the next month or so.

[KTA]

It is one of the drawbacks to first gens and VE power. The power has to be made down low to pull a good number. You need to be full tilt by 2000rpm to get anything out of one. Turbo setups that are lazy kill power.

[Cschafer]

I believe it . Why is that Brian, is it the pump or is it the cam we have in our motors? I's werid how once the powers on it dosent drop hardly at all till ya let off it. I don't supose I could get you to post one of your dyno sheets.

[KTA]

My dyno sheets are all posted in my gallery on diesel-central. The reason for the low end power is the single pumping element in the VE.