Got a new personal project. Taking a 4.0L and adding a few CC's to the mix. raising the compression, more displacement, lighter engine assembly. It's gonna be cool.
There is 454 grams in one pound. You may have been thinking of converting pounds and kilograms. I am surprised that these pistons didn't get a 1.5mmX1.5x3.0 ring pack or even thinner so that it would be easier to build. In some recent Toyota engines, they do not have offset wrist pins. Instead, the crank is off the bore center for the same effect. Be sure to have the right injectors. You need a higher flow rate. I think FiveO Motorsport speaializes in replacement injectors for Jeeps.
Brain fart. Not sure what happened there. Thanks for the correction. And as for injectors, we are going to give the stock ones a go. Easy to replace after if it isn't enough fuel.
@@EngineKrahnicles It is a huge risk to have the stock injectors not fuel quickly enough. Some people look to save money by buying rebuilds for the Ford 4.6 and just dealing with the core fee.
@@EngineKrahnicles Good, because I don't want you melting pistons when the fueling runs out. I love seeing it happen to guys who think they can just turn up boost without consequence.
I guess more info on this section would be good, but the video was getting too long. From my measurements, stock is a .175 offset and the new ones are .125
Which side does the piston offset go to, I would imagine u want it more vertical when it has the most force on combustion stroke so to the passenger side? Is that enough of an offset to be worried about a potential degree or 2 in top dead center? I would imagine pre detonation could be very bad if the rods not on its way back down, only reason I bring this up is stock jeep 4.0 timing isn’t adjustable to my knowledge On the rods side, I would imagine the 4.2 shorter rods would be used as the crank is longer, the 4.0 rods are not going to cause issues and ram the piston into the head or potentially a valve?
Luckily I still have the pan off. The pin is offset to the passenger side by an 1/8 of an inch. Too hard to describe over words, but with the trig of the pin, it doesn't affect the timing As for which rod to use, you use the 4.0 longer rod because the pin is higher in the piston. Counter-intuitive, but thats how this works.
@samuelfriesen1867 I read that an old hot Rodder trick is to flip it to the other side. I guess it make a good amount more power, but the pistons won't last long.
There is 454 grams in one pound. You may have been thinking of converting pounds and kilograms.
I am surprised that these pistons didn't get a 1.5mmX1.5x3.0 ring pack or even thinner so that it would be easier to build.
In some recent Toyota engines, they do not have offset wrist pins. Instead, the crank is off the bore center for the same effect.
Be sure to have the right injectors. You need a higher flow rate. I think FiveO Motorsport speaializes in replacement injectors for Jeeps.
Brain fart. Not sure what happened there. Thanks for the correction. And as for injectors, we are going to give the stock ones a go. Easy to replace after if it isn't enough fuel.
@@EngineKrahnicles It is a huge risk to have the stock injectors not fuel quickly enough. Some people look to save money by buying rebuilds for the Ford 4.6 and just dealing with the core fee.
@@skylinefever thanks, ill look into it
@@EngineKrahnicles Good, because I don't want you melting pistons when the fueling runs out. I love seeing it happen to guys who think they can just turn up boost without consequence.
I took your advice. We ordered up some new injectors, so we will be dropping those in.
Your stock pistons will have an offset pin also normally race pistons have no offset
I guess more info on this section would be good, but the video was getting too long. From my measurements, stock is a .175 offset and the new ones are .125
Which side does the piston offset go to, I would imagine u want it more vertical when it has the most force on combustion stroke so to the passenger side? Is that enough of an offset to be worried about a potential degree or 2 in top dead center? I would imagine pre detonation could be very bad if the rods not on its way back down, only reason I bring this up is stock jeep 4.0 timing isn’t adjustable to my knowledge
On the rods side, I would imagine the 4.2 shorter rods would be used as the crank is longer, the 4.0 rods are not going to cause issues and ram the piston into the head or potentially a valve?
Luckily I still have the pan off. The pin is offset to the passenger side by an 1/8 of an inch. Too hard to describe over words, but with the trig of the pin, it doesn't affect the timing
As for which rod to use, you use the 4.0 longer rod because the pin is higher in the piston. Counter-intuitive, but thats how this works.
Ahhhh that makes sense for the rod, was there any thought on which side would be more beneficial to have the pin offset to?
@samuelfriesen1867 I read that an old hot Rodder trick is to flip it to the other side. I guess it make a good amount more power, but the pistons won't last long.
@@EngineKrahniclesnothing truly great, ever lasts. Run it