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Old 01-02-2013, 08:50 AM   #11 (permalink)
IamDave0887
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Quote:
Originally Posted by Landmine View Post
I can hit 40 mph in second gear
I bet you can get faster than that

And i have hit 80 in my truck, which means i was near 4000rpms
at 40 mph in 2nd gear i'm sitting just over 2,100 RPM. Never tried to top out 2nd gear, but the 3.08s really help.

Hammer it in 2nd and ~6lbs of boost(the Banks T04B really starts to whine after 3.5 psi ) at ~2,400 RPM gets me to about 50 mph and climbing fast.

I"m surprised how little boost is needed and how much different the truck feels over N/A, even a year and half after the conversion and driving it daily.

I can run 2nd gear in the K-5 from ~15 mph to ~50 mph, and i'm sure i can go higher.

I hate lugging it when going from 1st to 2nd, so if i have to stop at the bottom of a hill before climbing it, i get to climb it in 1st, because 2nd would cause the engine to lug like all hell and the EGT gauge skyrockets as well as the copious amounts of black from the tailpipe.

At 70 mph i'm around 2,400 ish or so. I know i can bury the speedometer and still have pedal to go. When it had the 700R4 i could practically idle down the freeway at 65 mph.
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Old 01-02-2013, 12:52 PM   #12 (permalink)
Landmine
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3.08's are too tall for me,

I want to drive a truck with 3.73's to see if it still moves well
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Old 01-02-2013, 05:06 PM   #13 (permalink)
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Quote:
Originally Posted by Landmine View Post
3.08's are too tall for me,

I want to drive a truck with 3.73's to see if it still moves well
I have 3.73's and my truck moves along no problem, when my 700r4 is in first and I stomp on the go pedal I have no problem breaking the 31's loose . I will agree also with dave about how much a little boost helps out.
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Old 01-02-2013, 05:55 PM   #14 (permalink)
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My mechanic just got himself an 81 malibu (black on silver so he couldn't resist) He got a 48?/8.?L or some other silly thing that he's putting in it. He's got 3.73's and he doesn't think he'll swap the rear end.
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Old 01-02-2013, 06:41 PM   #15 (permalink)
Landmine
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Quote:
Originally Posted by countryboy90 View Post
I have 3.73's and my truck moves along no problem, when my 700r4 is in first and I stomp on the go pedal I have no problem breaking the 31's loose . I will agree also with dave about how much a little boost helps out.
Yes the turbo helps and the 3. gear ratio of the 700r4. the th400 and nv45 have a 2. something first gear so it is slower off the line.
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Old 01-02-2013, 06:59 PM   #16 (permalink)
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Quote:
Originally Posted by Landmine View Post
I want to drive a truck with 3.73's to see if it still moves well
My first truck had 3.73s and a TH400. N\A it moved just fine without any issues. Was a little loud at 70-75MPH, but not that horrible. My current truck has 4.10s with a TH400 and it will do 75MPH, but I don't push it past 70MPH just because of how loud it is and that makes me nervous. Not to mention the fuel economy tanks above 60-65MPH.

I do want to do an overdrive conversion, but that's a lot of money.
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Old 01-02-2013, 07:34 PM   #17 (permalink)
smackzed
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ditto about the 4.10's and th400.
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Old 01-02-2013, 08:10 PM   #18 (permalink)
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Quote:
Originally Posted by Margot View Post
My first truck had 3.73s and a TH400. N\A it moved just fine without any issues. Was a little loud at 70-75MPH, but not that horrible. My current truck has 4.10s with a TH400 and it will do 75MPH, but I don't push it past 70MPH just because of how loud it is and that makes me nervous. Not to mention the fuel economy tanks above 60-65MPH.

I do want to do an overdrive conversion, but that's a lot of money.
How did it do with 2000lbs in the bed?
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Old 01-02-2013, 08:11 PM   #19 (permalink)
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Thanks folks! That's the sort of info I was looking for.
I'll go ahead and treat it like I do my Mercedes OM engines and make 'em work now and again.
Meanwhile, I need to figure out if the fuel leak at the bottom of the filter is related to the problem of the engine dying 10 seconds after a cold start...
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Old 01-03-2013, 02:15 AM   #20 (permalink)
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Quote:
Originally Posted by countryboy90 View Post
I have 3.73's and my truck moves along no problem, when my 700r4 is in first and I stomp on the go pedal I have no problem breaking the 31's loose . I will agree also with dave about how much a little boost helps out.
700r4's 1st hear is lower than all the rest, so when you take off its like having a lower rear end for that gear. Tou take off like you've got 4.10's
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