Question about gearing with Nitrous - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 5 Old 06-29-2017, 06:55 PM Thread Starter
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Question about gearing with Nitrous

So I've been sorting out my car and I think I have it dialed in NA. The block was put together by an unknown machine shop and I can't find out who did it (long story). I think the rings haven't seated yet (doubt it, about 750 miles on the build) or are just bad and causing a lot of blow by. I'm ready to start using Nitrous after I do a leak down and compression check if everything checks out.

Pardon my ignorance on this subject but currently the car shifts around 6900 RPMs and is crossing the line at around 6900 as well in 4th. Car is a 5 speed and has 4.10's, current trap speed is 119mph.

What will happen if I add a 100 shot of Nitrous, will it cause me to run out of gear, will my mph increase? Might I need to run a taller tire, currently I'm running a 25.6" Drag Radial.

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post #2 of 5 Old 06-30-2017, 07:59 AM
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Are you sure you are going thru at 6900? Doubt it. Punch the numbers in the calculator. 6400 seems more likely. Id start with a 26in slick and leave the 4.10 for now. DR wont work well with a stick and spray.

http://www.tremec.com/calculadora.php


80 coupe, N/A 347, tko500 1.34, 6.30 @ 109.01, 9.87 @ 137.06

16 GT, daily driver on pump 93, Procharger 1.42, 6.31 @ 109.59, 9.80 @ 141.57
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post #3 of 5 Old 06-30-2017, 09:34 AM Thread Starter
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The Nitrous system is Progressive and I'll be able to make adjustments for traction if needed, I didn't log the runs due to laptop issues but next time out I'll log the runs to find out exactly when I'm crossing the line.
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post #4 of 5 Old 06-30-2017, 11:41 AM
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Based on the info you provided, if you cross at 6900 your trap speed would be 128.

6400 in the calc says 118.

80 coupe, N/A 347, tko500 1.34, 6.30 @ 109.01, 9.87 @ 137.06

16 GT, daily driver on pump 93, Procharger 1.42, 6.31 @ 109.59, 9.80 @ 141.57
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post #5 of 5 Old 06-30-2017, 04:54 PM
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Pull out a few degrees of timing and one step colder plug, sell the progressive and spray it of the gate. You should be fine with what you have to start with.. enjoy

It's not the size of your shop, it's what comes out of it that counts.
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