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My 440 Whiplash experience so far........
#1864515
07/05/15 08:20 PM
07/05/15 08:20 PM
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Joined: Feb 2005
Posts: 672 Wichita, KS
tmef
OP
mopar
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OP
mopar
Joined: Feb 2005
Posts: 672
Wichita, KS
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Has been great. I did some changes yesterday. I removed the 625 AFB and replaced it with a dual feed 750 Holley 4160 along with a one inch spacer. I also replaced the factory distributor with a Jegs machined unit. From what I have read it is the same Mallory piece that Mopar Performance used to put out. The carburetor really woke the motor up! I have 15" of vacuum at a rowdy 875 rpm idle (in neutral) and the motor revs right now. I drove it for the fist time earlier today and it is a beast. Instant power. No bogs, no lags, no stutters. Severe case of wheel hop, but I was expecting that from the beginning. I am very pleased with how it has turned out. I am going to run it up to Wichita Dyno ( http://www.wichitadyno.com/) next week and get the final tune done and have some real world HP numbers.
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Re: My 440 Whiplash experience so far........
[Re: tmef]
#2004715
02/03/16 11:35 AM
02/03/16 11:35 AM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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what kind of timing curve and base setting did you work out?
I played with the firecore dist then pulled it out. I think the 2nd motherboard in it is going out again. idles fine but has a sputter every where but at idle.
the stock dist has the FBO limiter plate on 18* and initial at 18* with the blue med springs. not as hot with points but runs really well now. will be adding a pertronix points conversion set up in a few days.
I think I am getting 12-13 inches of vac in N with 9-10 in gear with 950 rpm. 12 mpg with it. stock LS 10 3/4 TC with 2.76 gears turning a 29x15x15 M/Ts LOL!
got 6000 miles on it now and it is a blast to drive. with 3" muffs /pipes it scares everyone when rolling up to the gas pump.
I can tell you for fact at 4500 rpm flat out on the HWY it is scary fast. but mostly I idle around 1000 rpm in 3rd rolling 30 mph in town.
what specs did the holley wind up with for jets/PV?
Last edited by scratchnfotraction; 02/03/16 11:37 AM.
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Re: My 440 Whiplash experience so far........
[Re: scratchnfotraction]
#2007397
02/07/16 03:34 PM
02/07/16 03:34 PM
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Joined: Feb 2005
Posts: 672 Wichita, KS
tmef
OP
mopar
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OP
mopar
Joined: Feb 2005
Posts: 672
Wichita, KS
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what kind of timing curve and base setting did you work out?
I played with the firecore dist then pulled it out. I think the 2nd motherboard in it is going out again. idles fine but has a sputter every where but at idle.
the stock dist has the FBO limiter plate on 18* and initial at 18* with the blue med springs. not as hot with points but runs really well now. will be adding a pertronix points conversion set up in a few days.
I think I am getting 12-13 inches of vac in N with 9-10 in gear with 950 rpm. 12 mpg with it. stock LS 10 3/4 TC with 2.76 gears turning a 29x15x15 M/Ts LOL!
got 6000 miles on it now and it is a blast to drive. with 3" muffs /pipes it scares everyone when rolling up to the gas pump.
I can tell you for fact at 4500 rpm flat out on the HWY it is scary fast. but mostly I idle around 1000 rpm in 3rd rolling 30 mph in town.
what specs did the holley wind up with for jets/PV?
I took the new Jegs distributor out and put the stock one back in. It is a fine unit but I didn't like how much taller than the factory one is and it made things difficult up there with the fuel line and how I have the coil mounted. Initial timing is at 15* with just the factory timing curve and springs for now. The Holley is just straight out of the box for now too. Will play with all that when I get it up to the dyno again. I would be thrilled to be able to pull 12 mpg! That's awesome. My vacuum is right about the same as yours now. 15-16" in N, 10-11" in gear. I dropped a couple of inches in gear with the converter change.
Last edited by tmef; 02/07/16 03:42 PM.
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Re: My 440 Whiplash experience so far........
[Re: DaytonaTurbo]
#2007399
02/07/16 03:41 PM
02/07/16 03:41 PM
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Joined: Feb 2005
Posts: 672 Wichita, KS
tmef
OP
mopar
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OP
mopar
Joined: Feb 2005
Posts: 672
Wichita, KS
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Did you ever end up taking it to the dyno with the new rockers and converter? I haven't yet. As soon as I do I will report that. I kinda have a problem there now though. I sold my dually with all intentions of buying another truck but can't find anything I want. (I hate the truck market anymore but that is another story.) So now I have no way of trailering it up to Wichita. I will drive the truck there if I find 3.23 gears, not with the 3.91's though. Its about a 100 miles one way.
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