Regarding the studs. The drop in ARP studs I used were recomended over 24psi. I thought they told me good for 35psi Max. But I cant find the email that detailed the ratings
Your measurements of protrusion is .4 and .5 mm correct? According to the pic of the FSM that would indicate a "1 notch" gasket.
That is the correct gasket. Putting the 5 notch gasket in place " to be safe" is a waste.
It results in.....slower squish velocites, poor fuel air bowl mixing...
I spent alot of time on the exhaust manifold and ports. This made a noticable differance to overall performance.
Getting the squish correct I think is critical too.
Overall response
Good day. I have put about 5000km on the truck since getting back together in winter. I havent had alot of time to play around with it since getting things back together.
The motor runs very strong pre boost compared to the last build and rips on boost. I have not adjusted fueling or boost...
I had the same problem with my Mamba related to the boost not rising to their posted spring pressures. Used a manual boost controller initially and have recently installed an electronic boost controller. Your boost at 100kph is similar to my results as well. The electronic boost controller did...
Nice work on the truck. That is a great job on fabricating the bulkhead.
The Mamba turbo you have purchased has a 7cm exhaust housing. This may be a good decision. I finally got a chance to run my Cruiser for about 50km recently with the new motor. It is working better than ever.
I installed an...
I would say you are correct on the injector opening sooner so yes advanced.
I wonder if the plunger gets worn in the pump and it bleeds pressure. So it takes more crankshaft rotation to build enough pressure to crack the injectors making the timing late?
@chapel gate your post would suggest that as the injection system collects miles it loses advance to wear I am assuming. Is that correct?
If that is the case it makes sense that many posters see a benefit to advancing timing on there high mileage engines.
So with a rebuilt pump and injectors on...
It seems that the 1HDT likes to have the timing advanced. Most posters after advancing ip timing have experienced better fuel economy, less smoke, and improved acceleration.
I have also had the same positive results. One thing I noticed too is that engine noise and vibration increase as...
Do you know what spec they advanced the timing too?
I am pretty sure ACSD advances timing when cold. Which would reduce smoke. When I removed mine there was more smoke when the engine was cold.
My timing is set at .054” which is .001 above the Max Spec
Duramax Airbox Installed in 92 HDJ
I recently installed an airbox from a 2010 Duramax in my HDJ81v Landcruiser. Large airbox intake and a 5" outlet. Attached to 4" tube with as few bends as possible. Tapered silicone adapter to turbo.
Significantly better turbo response. EGTs down about...
Thats great I will check it out. You can really appreciate what gturbo and the like must go thru in testing there setups. Hours and hours of trial and error.
I am not running a sensor per say but a boost guage hooked to the exhaust manifold pre turbo. I am curious to know what pressure I am making in the exhaust manifold. I am not sure if you saw the damage to my exhaust valves on my 1HDT cylinder head posts. I may be back stopping to much pressure...