Black Diesel - Cummins Tahoe Gets Dynamic Timing Spacer - 4bt - VE Pump Timing Spacer - DIY - Power
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- Опубликовано: 18 сен 2024
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In this video, I cover installing an M&H style timing spacer on the 4bt Cummins in the Tahoe. I'm searching for a solution to the injector coking issues I've been having and I think we're on the right track.
Timing Spacer Kit
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Great idea using the inspection cam. Appriciate you doing that to show what your doing. I haven't ever seen someone do that in their videos.
I'd say it would be just about impossible without it. Appreciate you watching.
Great information I never thought about doing that
Thanks for watching. So far, the results look promising. We'll see here in a few weeks
This series has me pondering doing the same swap on my Yukon. Gas costs are killing me
It was a fun build for sure. It's been swapped for 10 years or better now. If you go through with it, plan on quite a bit of fabrication... and for the price, it would probably be cheaper to go with a 12 valve and use a dodge transmission (built accordingly).
@@NotSoGrandGarage I do have a low mileage 24 valve with a 6 speed Alison sitting in my motorhome but really want to swap that into at least a 2500.
I mean... 2500 suburban? Lol
@@NotSoGrandGaragethey pretty much do not exist here, I’ve seen 2 in the last 4 or 5 years.
@@slngblde gotcha.
I'm having slight coking problems as well. When I switch it back to diesel and run it hard for a few days it quits white smoking and runs good. Haven't messed with timing yet. Might be injectors. Adjusting smoke screw out helped a little. 93 12v
So far, I'm liking the results of the spacer. The power band difference is worth it in itself and it cut down on smoke on diesel so we'll see. I haven't put many miles on it yet on oil yet so I'm going to give it a couple weeks before I call it and swap in the new injectors.
@@NotSoGrandGarage I'm going to mess with my timing a bit and see if that helps. The truck has 420k miles on it. Who knows how long those injectors have been in there haha
If timing is stock, I'd consider the spacer. It will bump static timing a bit and gives you a much broader torque curve. Its about as difficult to install as it is to twist the pump but I think it gives better results. Mine was bumped 1/8" at the pump flange over stock and was still having issues.
@@NotSoGrandGarage the pump was replaced before I got it so who knows where it's at. Definitely seems like it should have more power so maybe it's off a little anyway
I replaced the injection pump in my 7.3 IDI, before a ferret meter I’d order had arrived. Drove to and from work for several days, and she made white smoke and EGT never got over 700. When my meter arrived and I verified injection timing I realized it was at 13 degrees BTDC!!! I adjusted timing back to 9 degrees BTDC (OEM spec is 8.5 BTDC) and the white smoke disappeared, with EGTs rising faster and capable of the danger zone. Thought I’d share, I definitely learned from the experience
It should also smoke way less in higher rpm and potentially use less fuel
So far... all of the above.
earlier injection will always create less smoke BUT not always lower fuel consumption.
Too early injection is bad as it ignite to early and the piston has to overcome too much pressure to pass top dead center and also on the way down there's already less pressure.
Trial and error will tell you where the lowest consumption is for your style of driving as on mechanical rotary pumps with centrifugal injection timing adjustment.
That's where an electronic pump has an advantage.
@@no-damn-alias For sure. If I were leaving injectors stock, I'd probably back down my static timing a bit as right now, it's sitting just over 1/8" advanced at the pump flange.. + the spacer. It's a bit much and could come down a bit but the larger injectors I'm putting in it soon will retard dynamic timing a bit. Going to wait until they are in before really tuning it in. As for the electronic pumps and such... you are again correct. My mind has been changed in the last year on newer engines and black diesel. I've seen and dealt with plenty of people who are having good luck with common rail engines and such. The more precise control over the injection event and overall fuel metering is a BIG advantage. The only downside is cost of replacement parts if something goes wrong.
theres no bolts to pull my ksb out pretty bizzare pump ive the ksb is literally molded into the pump ive also got a threaded rod in front of the back allen bolt on my power valve cover and factory setting locks on everything
Is it for sure an automotive pump?
@@NotSoGrandGarage its in my 91 dodge d250 i just picked the truck up a few months ago it also has a bunch of factory locks on a lot of bolts to stop people from adjusting anything too but yeah no possible way to get the ksb off it literally looks like its molded into the pump.
@@stevenbean9706 that is strange. The locks are normal but the ksb deal seems really odd.
@@NotSoGrandGarage the truck has 300k and with no mods runs like new its just so slow i got a ticket going through mass for going too slow! no joke had it to the floor and got a ticket for going too slow. top speed is 65-70 need some mods so the power valve and the governor spring was first to try i got a k&n air box as well the spacer now i cant put it in cause the ksb is literally molded into my pump ! im gonna finish putting it back together add an exhaust and new injectors i did a timing bump not sure if its gonna help but im gonna try it the truck is as stock as they comes.
@@stevenbean9706 fuel pin, fuel rate screw, and star wheel adjustment should wake it up a fair bit. Injectors will help too
Hey mate I have a problem what diesel d2 or light diesel oil which is black in colour & have sulphur content as compared to en590 fuel can weuse chlorine to remove the sulphur by adding it to D2.I came to know that it results into exothermic reaction may catch fire.Let us give your valuable suggestions.
I've never added any chemicals to my process other than thinning agents (such as gasoline, etc). We try to keep it as simple as possible.
@@NotSoGrandGarage mate can you investigate by using chlorine to reduce the sulfur as you have the storage take 1 l sample of diesel & let us know.
@ZarawarKhan-gs8hr I don't have a means of measuring Sulphur content of the oil before and after. Is there a simple way to do so?
@@NotSoGrandGarage mate I just want to you to check that by adding little amounts of chlorine to black diesel,does it catches fire 🔥 I know chlorine removes sulfur well don't want you to measure the sulfur in fuel.I am asking about chlorine to diesel.Hope you got it what I want to say.
@@ZarawarKhan-gs8hr I'm tracking now. Let me do some research on it.