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Re: 750 carbs on 700hp motors [Re: rt66jim] #1501040
09/14/13 10:37 PM
09/14/13 10:37 PM
Joined: Nov 2004
Posts: 1,745
Maryland
340_Dart Offline
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Dave, your combination is very similar to mine. And you run similar mph. Biggest difference I see is your 60'. What are you trapping RPM wise? What front suspension are you running? My car works best when it gets higher up on the tire. I actually just got home from the track. Ran back to back 10.12s @ 130.5 with 1.36 60'

Re: 750 carbs on 700hp motors [Re: 340_Dart] #1501041
09/14/13 10:52 PM
09/14/13 10:52 PM
Joined: Jan 2007
Posts: 8,128
Mt Morris Michigan
mopar dave Offline OP
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whats your car weight? trap rpm is 6700.

Re: 750 carbs on 700hp motors [Re: rt66jim] #1501042
09/14/13 11:09 PM
09/14/13 11:09 PM
Joined: Jan 2007
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Mt Morris Michigan
mopar dave Offline OP
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I should be at a 1.44 in relation to my best 10.39@131. so,what do you think needs attention, vert, rear gear or trans gear or is the car just too damn heavy?

Re: 750 carbs on 700hp motors [Re: mopar dave] #1501043
09/14/13 11:41 PM
09/14/13 11:41 PM
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Portage,michigan
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B3422W5 Offline
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Car isn't to heavy to not 60 foot better.
I went 1.43 on leafs running Eddie heads and a flat tappet when it weighed 3450 and ran 10.70's. Just didn't have enough steam past 1100 feet or so. That combo was 11.8 compression.
You have about a tenth in 60 foot that is possible to be picked up, IMO.


69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam, footbrake street/strip car

1.41 best 60 foot
6.54 @ 105.20



Re: 750 carbs on 700hp motors [Re: B3422W5] #1501044
09/15/13 12:44 AM
09/15/13 12:44 AM
Joined: Nov 2004
Posts: 1,745
Maryland
340_Dart Offline
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My car weighs 3000 with me in it.

Re: 750 carbs on 700hp motors [Re: mopar dave] #1501045
09/15/13 08:38 AM
09/15/13 08:38 AM
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Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
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Quote:

I should be at a 1.44 in relation to my best [Email]10.39@131.[/Email] so,what do you think needs attention, vert, rear gear or trans gear or is the car just too damn heavy?



I know it's an apples-to-oranges comparison, but my 440 Challenger @ 3750#s pulls 1.45-1.46 60s on 275R6015 DOT drag radials w/ 4.10s and a 4500-stall 'vert.

I'm not sure if you're under-geared for your torque curve or the converter hits "soft" or ???, but I'd expect you should be able to pull better 60s than my street/strip ride. You've got 5 MPH on top end over mine, yet mine has run solidly in the 10.5s w/ that much less MPH.

Simply trying to offer more food for thought...

Re: 750 carbs on 700hp motors [Re: BradH] #1501046
09/15/13 09:58 AM
09/15/13 09:58 AM
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Mt Morris Michigan
mopar dave Offline OP
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what rear gears are you runnin? any low gear sets in the trans? i'm gonna talk with dynamic this week to see if they can take a look at my vert on paper and made a recommendation if theirs an issue. i'll talk to cope again about the low gear set,but he talked me out of that last time.
the vert has 3% slippage when I run the numbers on Wallace.

Re: 750 carbs on 700hp motors [Re: mopar dave] #1501047
09/15/13 10:07 AM
09/15/13 10:07 AM
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Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
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It has 4.10s w/ standard 727 gear set (~ 2.45 1st, IIRC).

3% slippage is really good. Mine was 7-8% when I calc'd it and was told that's reasonable (not great).

Re: 750 carbs on 700hp motors [Re: BradH] #1501048
09/15/13 10:41 AM
09/15/13 10:41 AM
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Posts: 8,128
Mt Morris Michigan
mopar dave Offline OP
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than i really am lost as to whats dragging me down. the trans has 4 pinion planetaries front and rear from a truck trans. do you think they would cause any friction there, enough to hurt my 60?

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