Sounds like a decent setup
Will the weight kill it? Not sure the weight of that but sure it’s comparable to other 6 cyl diesels i.e heavy
CK5
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Will the weight kill it? Not sure the weight of that but sure it’s comparable to other 6 cyl diesels i.e heavy
It's equivalent to a Cummins.
The difference is completely mechanical injection, direct injection even. Has a vacuum pump if I want to keep the brakes but I prefer hydro boost.
Going to make any power or overall RPM adjustments?
That would seem much more user friendly
I also got a better turbo Wastegate adjustable.
Mine was not wastegated And seized.
I've seen that Burb around town before and never new who it belonged to until now. Cool build so far and definitely unique with that Perkins. Following along to see how everything turns out.
Ok so as I always do go back and forth between my choices (definitely 1st world problem).
So I am going with the 454/4l80e still to decide if I need a doubler or not but will run a 241 either way.
What would you say bbc owners is a good cruise rpm with 454 in overdrive?
Trying to pick my gears on the axles and no I am not looking for suggestions on the gears nor the tires size .
I just want to have the most comfortable rpm for cruise and work my way back since that's what it will do the most.
So I am going with the 454/4l80e still to decide if I need a doubler or not but will run a 241 either way.
What would you say bbc owners is a good cruise rpm with 454 in overdrive?
Trying to pick my gears on the axles and no I am not looking for suggestions on the gears nor the tires size .
I just want to have the most comfortable rpm for cruise and work my way back since that's what it will do the most.
Oh and it's a stock 93 tbi, will not do anything to it.
Might eventually down the road replace it with a l29 also stock but for now this is it
Might eventually down the road replace it with a l29 also stock but for now this is it
Can’t add much for the RPM for that application, but I’m betting with the bbc and any decent gears, you probably won’t need a Doubler using that 241 unless you get some big tires
But that tire size will also dictate the gear. Now we’re going in circles
What size tire ?
But that tire size will also dictate the gear. Now we’re going in circles
What size tire ?
Ok, obviously I have to be more precise.Can’t add much for the RPM for that application, but I’m betting with the bbc and any decent gears, you probably won’t need a Doubler using that 241 unless you get some big tires
But that tire size will also dictate the gear. Now we’re going in circles
What size tire ?
Is a big block comfortable cruising at 1800 rpm? 2000? Or does it need to be 2200rpm or more?
bp71k5
3/4 ton status
My 454 seems to like cruising ~2100 rpm. Depends on your definition of cruise. But I only have 37” tires and 4.56 gears in overdrive.
See I have 2 sets of axles, one on it with 4.10 that has been gone through, and another that is sitting in my backyard with 4.56 that needs going through.
I would like to run 40" tires but would step down to 38 if my 4.10 would work.
I would like to run 40" tires but would step down to 38 if my 4.10 would work.
By cruising I mean driving all day and not having the engine screaming nor bogging down. Minimum speed expectations are 70 and hopefully closer to 75 with possibilities of passing at 80-85mph
I
F I remember correctly you have the nv4500 right?
I think mine is in the high 2k doing 80 seems to do fine.
Yeah I figured 2600-2800 would be fine at the top end but I am hoping I can keep it on the low end without killing it or hunting for the right gear drive to od.
I guess I need to find the torque curve for that engine
255/85/16 ( 33.0 tire) / 4l80-e / 70mph
3.73 = 1990 rpm
4.10 = 2187 rpm
4.56 = 2432 rpm
4.88 = 2603 rpm
5.13 = 2736 rpm
if it was me and going to be towing a lot go deep . min 4.56 or deeper to keep the engine in the power band .
255/85/16 (33.0 tire ) / 4l80-e / 80mph
3.73 = 2274 rpm
4.10 = 2499 rpm
4.56 = 2780 rpm
4.88 = 2975 rpm
5.13 = 3127 rpm
at this speed 4.10 looking good to me .
3.73 = 1990 rpm
4.10 = 2187 rpm
4.56 = 2432 rpm
4.88 = 2603 rpm
5.13 = 2736 rpm
if it was me and going to be towing a lot go deep . min 4.56 or deeper to keep the engine in the power band .
255/85/16 (33.0 tire ) / 4l80-e / 80mph
3.73 = 2274 rpm
4.10 = 2499 rpm
4.56 = 2780 rpm
4.88 = 2975 rpm
5.13 = 3127 rpm
at this speed 4.10 looking good to me .
So looks like the L19 which is the tbi 7.4l has the peak torque of 380-385 @1400rpm.
So i guess from 1400 to 2000rpm it should be comfortable so if I can get it to 1800or a little more it should be a good ratio.
And if I feel it's not comfortable I can always put the 4.56 axles in.
I guess I answered my question.
So i guess from 1400 to 2000rpm it should be comfortable so if I can get it to 1800or a little more it should be a good ratio.
And if I feel it's not comfortable I can always put the 4.56 axles in.
I guess I answered my question.
