Well I've made it home for the summer and it's time to start tearing this thing apart. I will begin tomorrow, but yesterday I took it to the dyno. Laid down 503 / 1215. I was very pleased with the numbers, but the knocking is getting worse to it's time to take it apart.

 

58 minutes ago, Me78569 said:

I would love to see a dyno.  The butt dyno is hard to tune on.

If you're serious I think my brother wants to as well. I know a couple places up here that are reasonable on pricing. 

Maybe in a few months here.  I would like to spend some more time tuning the turbo, but I so rarely get on the heavy pedal that I test / tune stuff rarely anymore.

Yeah trying to tune twins up here in the city isn't fun either. 

Lay into it..... aaaand wer're doing 90

I'm still trying to find the happy spot with these damn things.

On October 31, 2015 6:02:33 PM, TFaoro said:

Everything before the twins engine wise, a cheap trans rebuild kit, fluids, paint, etc

And another gauge is in

 

You need to step it up..... if your to be taken seriously :( :) :) :) 

 

 

John,

 

Your check engine light is on.... :shifty:

What's the 3rd boost gauge for? 

30* and no grids. Little angry when she starts

Primary Boost
Secondary Boost
Drive Pressure
Trans Temp
EGT
Fuel Pressure

Damn she is angry. I would be too in 30 ...... think we hit 87 today .... around 92 with the shade factor :):):) 

 

After about 25*F mine won't even start without grid heaters.

2 hours ago, JOHNFAK said:

Primary Boost
Secondary Boost
Drive Pressure
Trans Temp
EGT
Fuel Pressure

Damn she is angry. I would be too in 30 ...... think we hit 87 today .... around 92 with the shade factor :):):)

 

I see... I don't think I'm going with a permenant drive pressure gauge. Temporary for tuning will be all I need.
 

2 hours ago, Mopar1973Man said:

After about 25*F mine won't even start without grid heaters.

Mine started at +15 last year... VERY angry. Wouldn't do that on the new motor though.

I tried to start it at -15 last year and it didn't even try! Flipped the switch and started without a hickup.

haha yea I don't bother trying to make her angry, shes already mad enough.

 

Mine did somehow start at 0*f without no grids ( PO had them wired backwards)  a few years ago, but pretty sure that was an act of god haha.

I once had a high mileage 6L Ford from work at -35... it was a 10 min process to get it running with the starter and then took 20 min of white smoke at idle to run normally. 

You couldn't see the apartment building I was living at for the white smoke. 

hahah sounds fun.

3 hours ago, CSM said:

I once had a high mileage 6L Ford from work at -35... it was a 10 min process to get it running with the starter and then took 20 min of white smoke at idle to run normally. 

You couldn't see the apartment building I was living at for the white smoke. 

We don't talk about 6.blows in these parts

I think I've finally got my twins in a good spot, at least EGT wise they are. After pulling over like 10 times and adjusting the boost elbow I've got it where a WOT run from 40-95+ going up hill has peak EGTs of 950*. (Smarty only) Peak boost is 42psi (I discovered if I smack my pos gauge it'll settle into the correct pressure) Now I just need to get a drive pressure gauge hooked up and see what's happening on the other side of things.

I talked with Jacob at diesel auto power and have a set of injectors lined up as well. Big shout out to him for supporting this forum and helping out the members here!!

I thought that the grids were emissions based above 10°F on all ISB's, but it sounds like that may be a HPCR thing. 

I have started in the low 20's without the grids and it starts/runs like it does at 50°. 

I shut them off with a fooler....

Not sure it matters how they are shutoff or removed, my point is that per Cummins they aren't needed above 10°F but looking at the posts in here I am guessing that's a HPCR thing and probably has a lot to do with the pilot injection. They are operational below 66°F but not out of actual need. 

 

Or it could be the injectors people are using...I've started dozens of 12 & 24 valve CAPS engines over the years in construction and Ag equipment with no grid heaters and they will start just fine down into the low teens/ upper single digits. They will start down below that but will run pretty rough the first several seconds. We try to plug them in anyway when it gets that cold. 

On my truck I don't even wait for the grid heaters until the temps drop down below 15 or so degrees. 

Edited November 8, 20159 yr by diesel4life

Do you have it plugged in when above 15degrees

Mine will start in 15*f wihtout the grids but it isn't pretty haha.  Grids cylcing makes it start like a top

My Dad used to drive Ford(cummins powered) school buses. The schools mechanic always told the drivers " if it's too cold to go outside with no clothes on, plug those buses in"