[ynot]

is that 300cc?

Kinda. I think I just expaounded in another thread of something. It's part of the timing code. It's peak possible output at whatever pressure and whatever timing in degress at whatever stroke thing. But ya it's cc's I believe.

 

[LOG HAULER]

Kinda. I think I just expaounded in another thread of something. It's part of the timing code. It's peak possible output at whatever pressure and whatever timing in degress at whatever stroke thing. But ya it's cc's I believe.

Thanks!!!

 

[SmokinCAT]

Kinda. I think I just expaounded in another thread of something. It's part of the timing code. It's peak possible output at whatever pressure and whatever timing in degress at whatever stroke thing. But ya it's cc's I believe.

Earlier in this thread actually.

Got a question for you again. Will the newer style exhaust manifolds work on the small cam, I know the bolt pattern is the same, but I noticed that the newer one is made a little different.

The divider in mine has kinda disappeared, and I also believe that I need to use the newer one so the HT4 will fit right.

 

[itali83]

What do you mean by newer style? We just put a "Pulse" manifold off a big cam 3 on my dad's small cam 350. even hung a Holset off a 500 N-14 and everything bolted right up, even the turbo outlet lined up with the crossover to the after cooler.

 

[SmokinCAT]

What do you mean by newer style? We just put a "Pulse" manifold off a big cam 3 on my dad's small cam 350. even hung a Holset off a 500 N-14 and everything bolted right up, even the turbo outlet lined up with the crossover to the after cooler.

If you look at the way the old manifold is designed you will see what i'm talking about, the old style looks more like a CAT manifold compared to the new one. I know they were built different for a reason, I'm just not sure what it is.:thumbsup

 

[itali83]

Well, yes it will fit. Depending on how early (not really sure) the first turbo'd cummin's had single entry turbo's and an open exhaust manifold. Then later they went to the dual entry turbo with a manifold that had a divider. My dad's '75 350 CPL 160 had the log manifold and stock cummins turbo but they were split entry. We put the pulse manifold off a big cam 3 and holset on there no problems. Gained almost 10 PSI of boost with nothing else done.

 

[SmokinCAT]

Well, yes it will fit. Depending on how early (not really sure) the first turbo'd cummin's had single entry turbo's and an open exhaust manifold. Then later they went to the dual entry turbo with a manifold that had a divider. My dad's '75 350 CPL 160 had the log manifold and stock cummins turbo but they were split entry. We put the pulse manifold off a big cam 3 and holset on there no problems. Gained almost 10 PSI of boost with nothing else done.

Did you ever have any luck with injectors for that engine, if not I will let you know how mine turn out, and get you some feed back on them when I get mine running again.

 

[LOG HAULER]

What do you mean by newer style? We just put a "Pulse" manifold off a big cam 3 on my dad's small cam 350. even hung a Holset off a 500 N-14 and everything bolted right up, even the turbo outlet lined up with the crossover to the after cooler.

How does it run?

 

[LOG HAULER]

Well, yes it will fit. Depending on how early (not really sure) the first turbo'd cummin's had single entry turbo's and an open exhaust manifold. Then later they went to the dual entry turbo with a manifold that had a divider. My dad's '75 350 CPL 160 had the log manifold and stock cummins turbo but they were split entry. We put the pulse manifold off a big cam 3 and holset on there no problems. Gained almost 10 PSI of boost with nothing else done.

Looks good!!!!!!:guitar:guitar

 

[LOG HAULER]

676 is a great number. Gimme a sec and I'll compare what you have with everything that is available without calling Bruce and spending a hundred grand. And remember, with tons of boost, we only need to full stroke the injector at the right time so the cam isn't as big a deal as you thing. N/A's are more serious on cams. I'll get back to ya!!

ok Tony can the cpl 675 be built to cpl 676 with the 676 pistons pack and the injectors I know the timing might have to change cause the 675 is set at 0.65

 

[itali83]

Did you ever have any luck with injectors for that engine, if not I will let you know how mine turn out, and get you some feed back on them when I get mine running again.

I bought a set of cummins remans for a 400 big cam. Got a smokin deal on them. They are top stop but was told they will fit and look to me like they should. I checked part numbers for the link between rocker arm and injector and my current ones are the same as the top stop need so should be ok.

We hung the turbo on with old injectors because we like to see what each piece does performance wise before we do another part. Like I said we went from 15-16psi of boost to 25-26psi with no more fuel pressure. I'm definitly up against my injectors becuas we are running 285PSI of fuel pressure and very little smoke so the injectors just aren't flowing enough. Thats why I got the new injectors.

I'm still debating on what to set the timing to when I put the new injectors in. Probably should slow it down a touch to help the cylinders out. Plus, the 400's were timed slower than 350's and the spray pattern will hopefully line up better if I slow it down a little. Not sure though, this truck never see's a load and never gets lugged so I may run it as hot as I possibly can. She sure does rattle with no AFC control!

Here's a vid of my dad and I at this years big rig drags...

 

[LOG HAULER]

I bought a set of cummins remans for a 400 big cam. Got a smokin deal on them. They are top stop but was told they will fit and look to me like they should. I checked part numbers for the link between rocker arm and injector and my current ones are the same as the top stop need so should be ok.

We hung the turbo on with old injectors because we like to see what each piece does performance wise before we do another part. Like I said we went from 15-16psi of boost to 25-26psi with no more fuel pressure. I'm definitly up against my injectors becuas we are running 285PSI of fuel pressure and very little smoke so the injectors just aren't flowing enough. Thats why I got the new injectors.

I'm still debating on what to set the timing to when I put the new injectors in. Probably should slow it down a touch to help the cylinders out. Plus, the 400's were timed slower than 350's and the spray pattern will hopefully line up better if I slow it down a little. Not sure though, this truck never see's a load and never gets lugged so I may run it as hot as I possibly can. She sure does rattle with no AFC control!

Here's a vid of my dad and I at this years big rig drags...
YouTube- big rigs drag racing

You should timed it at .72 or 73

 

[SmokinCAT]

I bought a set of cummins remans for a 400 big cam. Got a smokin deal on them. They are top stop but was told they will fit and look to me like they should. I checked part numbers for the link between rocker arm and injector and my current ones are the same as the top stop need so should be ok.

We hung the turbo on with old injectors because we like to see what each piece does performance wise before we do another part. Like I said we went from 15-16psi of boost to 25-26psi with no more fuel pressure. I'm definitly up against my injectors becuas we are running 285PSI of fuel pressure and very little smoke so the injectors just aren't flowing enough. Thats why I got the new injectors.

I'm still debating on what to set the timing to when I put the new injectors in. Probably should slow it down a touch to help the cylinders out. Plus, the 400's were timed slower than 350's and the spray pattern will hopefully line up better if I slow it down a little. Not sure though, this truck never see's a load and never gets lugged so I may run it as hot as I possibly can. She sure does rattle with no AFC control!

Here's a vid of my dad and I at this years big rig drags...
YouTube- big rigs drag racing

If you read back aways, you will see where I brought up the BC injectors too, the problem is not will they fit, it is that fact that the cam cannot create enough lift for them to fire properly. The injector lobe on a small cam is only .176" versus the .224" on the big cam, then when you factor in the follower difference and the possibly different rockers that were used it makes big difference.

 

[itali83]

Really, I was always told that the cam profile was the same, just bigger journals for supporting more fuel pressure and not breaking so easy. That'll really suck if these injectors don't work. Definitly let me know what you got for injectors, how they work out because if there is no way to make mine work, i'll have to sell/trade them for something that will take advantage of the bigger windmill.

 

[SmokinCAT]

Really, I was always told that the cam profile was the same, just bigger journals for supporting more fuel pressure and not breaking so easy. That'll really suck if these injectors don't work. Definitly let me know what you got for injectors, how they work out because if there is no way to make mine work, i'll have to sell/trade them for something that will take advantage of the bigger windmill.

When I get them and get the truck up and running I will let you know, Im basically doing a build somewhat compareable to yours.

Im starting with a 160CPL, but Im going to run a HT4 turbo instead of a HT60 off an N14. I will also be switching the valve springs out to a dual spring setup so I can throw a bunch of rpms at it. The timing will be left alone for now, mostly due to a limited amount of time, but if the cam ever does have to come out I will be setting it back to aorund .082" on the timing.

My only real concern at this point is how the push tubes are going to react to high fuel pressure and big injectors, Im hoping that with the higher flowing injectors it will lessen the force that the injector slams back shut with, if not I will be working on a set of good push tubes for a small cam in the near future as well.

This is not being built to do anything but play, I dont know how many people have told me that it just cant be done, but Im lloking to be the one that actually tries something different, and if it work it will suprise alot of people, if not I will pull the motor and sit something yellow in its place. :thumbsup

 

[itali83]

I know, on some other sites, people are like, you need to cut the block, change pistons, yadda yadda yadda, I'm like, I'm just a poor kid who wants to have some fun with the mechanical skills that I have and what I've got to work with. I'm not going to be pulling loads up 5 mile hills with my foot in it for ever. The way I look at it, as long as my pyro doesn't run over 1200ish, I'm not going to melt it down, the fuel pressure isn't crazy high like 300psi the little bit we run it, it'll last a long long time. Let me know because I guess I'll need to be getting different injectors.

 

[SmokinCAT]

Well I got to dig a little deeper in it this past weekend, and here is what I found.

After I bought the truck and brought it home I had it running for a while, at some point it developed a miss, I never thought much about it until I decided to start working on it, I was thinking bent push tube. Turns out #1 injector had stuck all the way down, I had to pry it apart.

I believe that the previous owner replaced #2 injector at some point and time, it also had the proper length thick wall push tube, where the others were the old style. I dont think the over head was set right on the front 2 cylinders and thats why it stuck the injector.

Then I was looking all the injectors over and noticed that #1 also had antifreeze on it, so I decided to pull the head and had more anti freeze laying on top of the piston, but none on #2. I rounded up another head to throw back on it and thats about all the farther I got.

 

[SmokinCAT]

I will be picking up a flat flywheel on Friday so I can get around to putting the bigger clutch in it.

Prolly won't hear much from me next week, I will be busy working on the old girl, I got a week off work so when I make it back on here I should have some video of the truck running.:woohoo

 

[itali83]

Any progress?

 

[SmokinCAT]

Any progress?

Well I got the injectors in, flywheel switched, even had to change a starter, but I got the truck running for the first time in a long while. I'm somewhat impressed at the amount of fuel those injectors deliver especially due to the fact that the pump I'm using right now has never had the fuel pressure messed with.

Since we are going into winter I slowed down on it, I would like to still get my hands on a good BC block. As of now I'm gathering parts to build it right, which the parts I'm working on will work on either motor I'm wanting to build it so it holds together.