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Author Topic: 9 second twin P7100 12V  (Read 4615 times)

Offline Austin The DieselTech

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Re: 9 second twin P7100 12V
« Reply #15 on: December 19, 2011, 05:09:43 am »
Your not the only one today that has told me that Rich lol.

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Offline Mitch

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Re: 9 second twin P7100 12V
« Reply #16 on: December 19, 2011, 05:14:17 am »
That is way outta my experience range.  Im having fun trying to tune 1 pump.  I can't imagine what it would be like to tune 2 pumps to match eachother and make them act right.

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But here's the thing.....

You don't need 2 p-pumps to run 9 seconds.

Sooooooo, why?
Because he can. An idea will burn in the back of your mind and drive you crazy until you attempt and succeed.
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Offline Cumminalong

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Re: 9 second twin P7100 12V
« Reply #17 on: December 19, 2011, 05:28:58 am »
In racing though, you don't do it just because you can, you generally have a need.

With a P-pump, there is absolutely no need for that kind of complexity to run a high 9 second pass.

I mean, that's Pro Street territory right there and all you see is single 13 or 14mm pumps running Mitusa lift pumps.

Don't get me wrong, I think its pretty damn incredible that it even runs, let alone runs 9's, but a single p-pump will flow more than enough fuel for a 9 sec truck.

I mean think about it.....that's 1 second faster than my truck at its current track weight of 7200 lbs. 2nd Gens are lighter to begin with and that thing is more than likely on a diet, so he really doesnt need that complex of a setup.
« Last Edit: December 19, 2011, 05:31:15 am by Cumminalong »

Offline Austin The DieselTech

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Re: 9 second twin P7100 12V
« Reply #18 on: December 19, 2011, 05:58:40 am »
And that truck has dual 13mm pumps..............

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Offline Mitch

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Re: 9 second twin P7100 12V
« Reply #19 on: December 19, 2011, 11:26:33 pm »
So the builder is essentially a mechanic who doesn't think and just throws parts at it
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Offline Cumminalong

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Re: 9 second twin P7100 12V
« Reply #20 on: December 20, 2011, 12:21:15 am »
So the builder is essentially a mechanic who doesn't think and just throws parts at it

No, thats definitely not the case. He certainly understands the operation thats for sure.

But, the level of complexity is incredible.

Trouble shooting it would be a nightmare.

If he was trying to fuel a dragster or something and was at the point that he needed a Sigma pump to support to fuel needs, then yeah this would do it with a lot lower budget.

But, a high 9 sec ride doesnt need 2 pumps.

Its cool and I thinks its awesome that it works, but not what you need for that speed.

Offline sanddragonslayer

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Re: 9 second twin P7100 12V
« Reply #21 on: December 20, 2011, 12:45:58 am »
i just watched the vid.... It actually gave me goose bumps.  :fart:
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Offline Mitch

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Re: 9 second twin P7100 12V
« Reply #22 on: December 20, 2011, 04:29:27 am »
i just watched the vid.... It actually gave me goose bumps.  :fart:
Uh oh!  :Mechanic: :burn:
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Offline 6LCummins

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Re: 9 second twin P7100 12V
« Reply #23 on: February 09, 2012, 07:45:38 pm »
Not to bag on the guys at RPS but i have to agree with cumminalong, there is barely a need for a 13mm pump to get in the 9s. Even on fuel only. It is pretty cool but that's a ton of time to put into something, its almost as effective as dual fed injectors...
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Offline Batman

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Re: 9 second twin P7100 12V
« Reply #24 on: February 10, 2012, 04:03:09 am »
Holy cow, those injector lines look like sparkplug wires running all over like little snakes.  Most of the 9-sec trucks I have seen running 1 pump have been 2wd drive (Rich and Austin and others are definitely far more inside diesel drag racing than I am), if this one is 4wd that's a pretty decent weight hit on it (I'd guess 300lbs or better).  Even with that 2 pumps does seem pretty crazy.  Maybe 9's are not the goal here, though.  how long has he been running this truck, a couple seasons?  Maybe with all the fuel potential he's just planning ahead to make a 6000lb machine run 7's or even touch the 6's.  Now that would be insane, especially if he can do it without hitting the drugs.
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Offline Cumminalong

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Re: 9 second twin P7100 12V
« Reply #25 on: February 10, 2012, 04:33:17 am »
Holy cow, those injector lines look like sparkplug wires running all over like little snakes.  Most of the 9-sec trucks I have seen running 1 pump have been 2wd drive (Rich and Austin and others are definitely far more inside diesel drag racing than I am), if this one is 4wd that's a pretty decent weight hit on it (I'd guess 300lbs or better).  Even with that 2 pumps does seem pretty crazy.  Maybe 9's are not the goal here, though.  how long has he been running this truck, a couple seasons?  Maybe with all the fuel potential he's just planning ahead to make a 6000lb machine run 7's or even touch the 6's.  Now that would be insane, especially if he can do it without hitting the drugs.

The problem you run into there is part breakage.

Getting 6000+ lbs into the 10's and 9's takes it toll on driveline parts FAST.

Start pushing 8 seconds, 7 seconds and 6 seconds, and the weight MUST go down. The driveline simply will not live at those weights and power levels.

As heavy as my truck is and what it's capable of, it does make me nervous each time I stab it with sticky tires and a track that hooks. Coming out of the hole and right when the nitrous hits in 2nd gear are the times I worry about the most.
« Last Edit: February 10, 2012, 04:35:03 am by Cumminalong »

 

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