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Re: The white car makes it's new best [Re: WHITEDART] #2419866
12/17/17 02:33 PM
12/17/17 02:33 PM
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Al_Alguire Offline
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I think it is time to consider moving the fuel system up to the front of the car...Car is accelerating well and IMO it would be a beneficial change..If you truly have only 1-2lbs of fuel pressure up top that will be ALOT of your AFR issue no doubt. IMO switching to a better pump when you move the stuff up front will be a good change as well. IMO Weldon is the best stuff out there hands down.

Car is working well..Would love to see a driveshaft graph for sure. Looks like by the RPM graph you could use a little converter tune up too, but without the driveshaft hard to say for sure. But it looks like you have a fair amount of shift drop and there is a definite "lag" after the hit and at the shift...

Great lap for sure..I am sure that Yellow Mustang is scared and we all know that little Chevy II was crappin his drawers smile


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"It's never wrong to do the right thing"
Re: The white car makes it's new best [Re: Al_Alguire] #2419882
12/17/17 03:19 PM
12/17/17 03:19 PM
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Originally Posted By Al_Alguire
I think it is time to consider moving the fuel system up to the front of the car...Car is accelerating well and IMO it would be a beneficial change..If you truly have only 1-2lbs of fuel pressure up top that will be ALOT of your AFR issue no doubt. IMO switching to a better pump when you move the stuff up front will be a good change as well. IMO Weldon is the best stuff out there hands down.

Car is working well..Would love to see a driveshaft graph for sure. Looks like by the RPM graph you could use a little converter tune up too, but without the driveshaft hard to say for sure. But it looks like you have a fair amount of shift drop and there is a definite "lag" after the hit and at the shift...

Great lap for sure..I am sure that Yellow Mustang is scared and we all know that little Chevy II was crappin his drawers smile
when I get home tonight I will tap into the race pack.. and post a couple graphs..


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: The white car makes it's new best [Re: WHITEDART] #2419889
12/17/17 03:27 PM
12/17/17 03:27 PM
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Al_Alguire Offline
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Cool...Like to see the DS RPM for sure...


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Re: The white car makes it's new best [Re: Al_Alguire] #2420103
12/18/17 12:17 AM
12/18/17 12:17 AM
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The 5.42 to pass.. at the peak G-Force

20171217_180827.jpg

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: The white car makes it's new best [Re: WHITEDART] #2420104
12/18/17 12:19 AM
12/18/17 12:19 AM
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Same pass at the Finish Line..

20171217_181508.jpg

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: The white car makes it's new best [Re: WHITEDART] #2420117
12/18/17 12:53 AM
12/18/17 12:53 AM
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I am losing 1600 RPM on the shift.. trap RPM is 8000 in the 1/8th.. maybe time to put the 7 in back in it.. it's about 800 RPM loser


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: The white car makes it's new best [Re: WHITEDART] #2420131
12/18/17 01:16 AM
12/18/17 01:16 AM
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Al_Alguire Offline
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That driveshaft RPM is ugly at the hit really. It LOOKS like it unloading but without seeing the G force with it hard to confirm. That DS RPM line is pretty jumpy down track so could just be an issue with the pick up. Is it a 2,4 or 8 magnet pickup? The G meter will tell a lot more of the story with that info. See if it is more linear and not as "jumpy". If it is then those "waves" in the DS RPM could just be a sensor issue.

That RPM drop is killing ET for sure. Also the RPM line shows the car slowing at the hit. Dragging the engine RPM way down after the initial hit. Likely also a converter thing. Get that line more linear without the drop and straighten that DS rpm line out and you will find a fair amount of ET...

One other thing I didn't mention earlier in reference to the fuel pressure. I would want to confirm the reading on a gauge as well. Sometimes racepak sensors can be not so happy. With fuel pressure that low I'd want to make sure


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"It's never wrong to do the right thing"
Re: The white car makes it's new best [Re: Al_Alguire] #2420142
12/18/17 01:27 AM
12/18/17 01:27 AM
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Unfortunately I only have A 2 magnet coupler.. which gives me that big jump at the hit... the bumps at the end is the track... it is horribly rough the last hundred feet


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: The white car makes it's new best [Re: WHITEDART] #2420154
12/18/17 01:41 AM
12/18/17 01:41 AM
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2.82 at the hit

20171217_194006.jpg

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: The white car makes it's new best [Re: WHITEDART] #2420157
12/18/17 01:44 AM
12/18/17 01:44 AM
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Al_Alguire Offline
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Well that tells the story. Car is either spinning the tire...G meter goes down as wheelspeed goes up..Then you can see where it just noses over especially on the G meter when it pulls the engine down. The acceleratiomn of the car just drops off completely. Still got some work to do smile


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"It's never wrong to do the right thing"
Re: The white car makes it's new best [Re: Al_Alguire] #2420167
12/18/17 01:58 AM
12/18/17 01:58 AM
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I'm in the process of making a couple big changes to the car.. hopefully it will address some of these issues. I'm close to 2/10ths off.. from where the horsepower says I should be.. so I guess back to work I go


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: The white car makes it's new best [Re: WHITEDART] #2420176
12/18/17 02:11 AM
12/18/17 02:11 AM
Joined: Jan 2003
Posts: 19,363
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Al_Alguire Offline
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Well you know what the Vette makes for power and where we are at ET wise.

The good news is from what I see there you have definite room for improvement for sure.

Check that driveshaft ring to make sure it is not hitting anything. But from what I see those DS and G meter lines line up to well to not be an issue traction/suspension wise. Maybe topping out the shocks, or leafs...


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
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