junkyardhero
Well-Known Member
is it really? *side eye*
Diff gear recommendations
- Thread starter 4spdragtop
- Start date
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is it really? *side eye*
I mean if your Garfield... or really like Lasagna it's a great thing. Then again, the Italian Mobsters were pretty rowdy.. so the gears must be good right?
And the only way around the limited selection would be to swap the entire pig(which I'm not against), correct?
I saw that Motive was Italian made, so that's a good thing.
I shoulda snagged an empty 83/4 pig at moparfest a couple years back for $50
junkyardhero
Well-Known Member
340sFastback
Well-Known Member
I have Randy Ring & Pinion 489 center section in my car for about 20 years. And last 15 years stroker engine and now 6 spd manual trans. I change gear oil regularly to help it last.
Whew! Now I feel better.
Thanks for all chiming in guys, and I apologize for lack of info on my part. I'll include more.
I emailed Cass/Dr Diff, for the 741 the gears are Korean made. Everything else with "kit" is USA.
I emailed Motive and theirs is Korea as well?? Website says Italy tho??
The trans I have is original 67/904.
The cam is an old school Comp 20-247-4
I bought here(probably too big but couldn't pass up)
https://www.compcams.com/magnum-236...r-273-360.html?SID=j2orr5rmdfmu64agmq3i93dc1d
I'm thinking like OMM said it needs more stall obviously, but do that first?
Thanks all.
I emailed Cass/Dr Diff, for the 741 the gears are Korean made. Everything else with "kit" is USA.
I emailed Motive and theirs is Korea as well?? Website says Italy tho??
The trans I have is original 67/904.
The cam is an old school Comp 20-247-4
I bought here(probably too big but couldn't pass up)
https://www.compcams.com/magnum-236...r-273-360.html?SID=j2orr5rmdfmu64agmq3i93dc1d
I'm thinking like OMM said it needs more stall obviously, but do that first?
Thanks all.
33IMP
Well-Known Member
If you figure it needs more stall speed, absolutely do that first!!!
You might find it wakes up the car so much you don't need a gear swap.
Think about a power /torque curve. How much more power and torque does a typical ic engine have at 3300 rpm than 2200? (Without changing a thing in or out of the engine).
You might find it wakes up the car so much you don't need a gear swap.
Think about a power /torque curve. How much more power and torque does a typical ic engine have at 3300 rpm than 2200? (Without changing a thing in or out of the engine).
Hp is about 63% of torque at 3300 rpm vs 42% @ 2200 rpm, guess were talking a LA 360 so probably around 350 tq (147hp) at 2200 rpm and 400 tq (252 hp) @ 3300 rpm basically around an 100 hp difference give or take.
junkyardhero
Well-Known Member
that is... uhhh... sizeable for a street cam. even more so if you're down on cubes.
it's on a 106 with 110 so at least you've got that going for ya.
i'd stall it up first, personally. hope you have compression...
What size motor and c.r.
Sorry, .030 over 340. I would have to chk notes on CR. At work right now.
Lol, depending on what you mean by "compression". Pistons are old TRW's sticking out approx .030. But I gotta dbl chk notes to be "accurate".
Hey we overcammed the 273, so I probably(without a doubt) over cammed the 340...
Hey we overcammed the 273, so I probably(without a doubt) over cammed the 340...
Yeah all this talk about 2400 this and that. Yeah if maybe you want a pussy for a car. I'd put a tight 3200-3500 in it all day long.
With that cam I'd go with a 10 inch converter 3500 and a 4.10 gear. You'll think you bought a different car. You'll be able to smoke out complete neighborhoods! If you don't like it I'll buy the converter and gears. lol. You'll have more fun than legally allowed. And you can still put the 3.23's back in if you are going on a long haul.
Yes do the converter first . You will see, It will make the car perform a lot better then a gear change. on the street.
Look for a deal on a newer trans with a better converter . May find a whole unit cheaper then a new converter.
The converters in the 67's were the worse for performance.
Were the 67's the course splines like the 65-66's.
I'm not sure, but I had to install an adapter ring in crankshaft for the smaller snout.
junkyardhero
Well-Known Member
yeah they were the early ones that are almost impossible to find performance converters for.
but these days a custom converter is gonna be about the same coin as a good off the shelf unit... so it's kind of six of one and how the cookie crumbles.
If your going to pull the trans have the later lower ratio 1st gears put in. Best of both worlds
Oh yeah! PTC 9.5", flashes around 3500/3600 behind my 5.9, .218/.224, .517 on a 110, with 3:23's.
RRR also recommended the cam. Wish I would have gone with his suggestion to go 108 on the LSA...but I was scared, lol.
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ir3333
Well-Known Member
Maybe call Dynamic and have them build you a 9 1/2"?
john-9
Well-Known Member
Steve Motive performance gears in the Orange Box are made in Italy , they also have Blue Box street gears for some makes (9inch Ford etc. ) also made in Italy ,,, they do have gears made somewhere in Asia and are cheap price wise ,, the part number for these gear sets has an A at the end . i do not think they make the cheap gear for 8-3/4 differential. even Timken bearings has gone offshore i am seeing more made in China on their boxes and other boxes say the bearing is made with imported components. if you need a complete differential let me know , you may have seen my diffs at Moparfest.
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