Pulling truck engine "again" BBC
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Re: Pulling truck engine "again" BBC
hmmm...
Odd thing is now that the heads and valvetrain is installed it doesnt seam a whole lot harder to turn over. I will give it a checkover... maybe I was high on that 1st check... gettin old...lol
Odd thing is now that the heads and valvetrain is installed it doesnt seam a whole lot harder to turn over. I will give it a checkover... maybe I was high on that 1st check... gettin old...lol
Re: Pulling truck engine "again" BBC
Was that breakaway torque or continuous? I thought my 4.450" x 4.00" BBC, at 25-35# continuous with standard tension 1/16" -1/16" - 3/16" rings was on the high side but from what I've read since I guess it's OK. You are using a beam-type wrench I assume?408swinger wrote: ↑Wed Oct 31, 2018 6:27 pm that was just the rotating assembly and cam... no springs or heads on.
Crank spun nicely after install , rings file fit to .016 on a 4.03 bore.. I just attributed it to the 4" crank.
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: Pulling truck engine "again" BBC
It's not too far off from what I think it needs. Close IN. valve a little earlier and open ex valve a little earlier, add lift.
Randy
Re: Pulling truck engine "again" BBC
Found a number faintly etched in the top. 5011h3 It's a weisco piston.
Heavy, 765 gram for just the piston. 157 for the pin.
Randy
Re: Pulling truck engine "again" BBC
Install liners in guides for 11/32 valves or 5/16 if they make a valve like you need. Would add a lot to the life of the springs, and some rpm to the motor.
Re: Pulling truck engine "again" BBC
So advance the cam and put more rocker on it. Lol...problem solved ha ha
Re: Pulling truck engine "again" BBC
Problem with that idea is, half a set of Jesels is more than a cam.
Checkin some springs last night. 1.640" springs. 200-210 seat and 570-580 open at .725" lift.
Seems kinda weak for a 157 gram valve, an RX lobe and 1.7 rocker and any real rpm.
Randy
Re: Pulling truck engine "again" BBC
Its gonna need more than that. This guy gonna do titanium also?
Re: Pulling truck engine "again" BBC
Checkin some springs last night. 1.640" springs. 200-210 seat and 570-580 open at .725" lift.
Seems kinda weak for a 157 gram valve, an RX lobe and 1.7 rocker and any real rpm.
Randy
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I would say your right about that, i didnt know they made springs in that diameter with light pressure like that, last set of 1.64 springs i used were 245 seat 750 open @.73 lift, but that was with an 88 gram 2.08 in valve and 9700 rpm
Tom
Seems kinda weak for a 157 gram valve, an RX lobe and 1.7 rocker and any real rpm.
Randy
[/quote]
I would say your right about that, i didnt know they made springs in that diameter with light pressure like that, last set of 1.64 springs i used were 245 seat 750 open @.73 lift, but that was with an 88 gram 2.08 in valve and 9700 rpm
Tom
Re: Pulling truck engine "again" BBC
If that Wiseco piston and pin weight is really legit, then a standard forged Eagle crank and a inexpensive kit rod offering may have a real problem getting to 9000rpms in one piece!
That's a tank of a piston/pin combo for a 9000 rpm BBC! Can you afford a whole new backup engine? If not build this engine a little better and STRONGER! JMO
That's a tank of a piston/pin combo for a 9000 rpm BBC! Can you afford a whole new backup engine? If not build this engine a little better and STRONGER! JMO
The Older I Get, The Dumber I Get
Re: Pulling truck engine "again" BBC
It's not my engine, so it's not my budget.
It's a customer I guess you could say,
Not an international customer, but just a local puller we know.
Not sure it will go to 9000 rpm. We'll see what the budget ends up being.
Randy
It's a customer I guess you could say,
Not an international customer, but just a local puller we know.
Not sure it will go to 9000 rpm. We'll see what the budget ends up being.
Randy
Re: Pulling truck engine "again" BBC
I would say your right about that, i didnt know they made springs in that diameter with light pressure like that, last set of 1.64 springs i used were 245 seat 750 open @.73 lift, but that was with an 88 gram 2.08 in valve and 9700 rpm
Tom
[/quote]
It will get different springs for sure.
Not sure about this engine. Supposed to have 30 hooks on it in a truck from Nebraska but some of the things I'm seeing don't add up to that.
Maybe they just didn't spin it that hard. A high gear and it wouldn't pull it maybe ?
Randy
Re: Pulling truck engine "again" BBC
There is a phenomenon in the Hunting world I would like to explain to you. Its called Ground shrinkage. Its when your buddy shoots a hell of a buck, huge horns, probably at least 12 points and it runs off into the forest. Once it dies and the horns touch the earths surface, the actual ground or soil causes them to shrink in size so by the time you both track the deer down and find it, they are considerably smaller than the deer that your buddy has described. Probably something similar is happening with the engine you are working on, the actual horsepower or pull results are somehow askew from what the engine was advertised.
Re: Pulling truck engine "again" BBC
Seen that before.
Things not as they are presented.
Guess we'll do the best we can within the budget from this point on.
Randy
Re: Pulling truck engine "again" BBC
It's as simple in pulling as it is in racing, "Power costs Money, How far do you want to Pull!"
The Older I Get, The Dumber I Get