for anyone who is considering 4.10s

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11/10/06, 08:23 PM

#21

94tbird

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Quote:

Originally Posted by official_style

ya it was a typo, i meant lower lol.

haha no problem.

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11/10/06, 09:26 PM

#22

tom281

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Quote:

Originally Posted by 94tbird

nope

its a 15% loss for manuals give or take and a 20% for autos.

and it is 322x1.15 because 1.00 would be his current level because anything times 1 is the starting number .15 is 15% so 1.15 is the starting number plus 15 % in this case 322rwhp is 370.3 at the crank

Not to be **** but you're math is wrong; LBJay is right. We used to call percentage multiplication by 1 "easy math" because it saves the one step of figuring the multiple by subtracting the desired percentage from one. Instead of 322 X 1.15 it should be 322 / (1-.15) or 322/.85 which equals 378.8 at the crank. Either way, it is what it is........ good power numbers!

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11/11/06, 10:01 PM

#23

Rebel73

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Quote:

Originally Posted by 94tbird

Ok,

this is one case where I wouldn't mind being wrong..

so can anyone give me a ballpark on my crank hp with my listed mods?

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12/15/06, 08:08 PM

#24

JonW

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Can 4.10s be put in an automatic? I thought I read on another forum that putting 4.10s in an auto caused numerous problems.

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12/15/06, 08:31 PM

#25

GRAYPNY

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4:10's can be put in an auto but it seems that some people opt for the 3:73 for the auto and 4:10 for the manual.

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12/16/06, 12:20 AM

#26

Dan

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Quote:

Originally Posted by tom281

That is the correct math.

Tons of people get this wrong so don't sweat it if you make the mistake of multiplying by 1.xx where xx are the losses.

Plus, we don't know the losses to an exact percentage anyway unless you dyno the engine and then the car and figure out the loss this way. Its somewhere near 15% for manuals.

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12/16/06, 05:27 AM

#27

Nick85

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Quote:

Originally Posted by JonW

Can 4.10s be put in an automatic? I thought I read on another forum that putting 4.10s in an auto caused numerous problems.

4.10's were made for this auto trans. I have over 40,000 miles with mine and no problems. What you're reading about is not problems with 4.10's but problems with bad installers. They're very tricky and have to be done by someone who really knows what they're doing.

Go with Ford Racing.

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12/16/06, 02:15 PM

#28

Silverfox

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Does anyone have the spreadsheet for the 5 speed auto with the stock 3.31 rear for a comparison of the change to 3:73 ?

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12/16/06, 02:50 PM

#29

tom281

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Search the forum- its been posted before I know- but I don't remember where.

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12/16/06, 04:07 PM

#30

tom281

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You can use this; enter in the parameters that are appropriate for what you have.

http://www.f-body.org/gears/

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12/16/06, 04:15 PM

#31

Poco

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I went with 3:73's,either way you get the benefit of some that torque from the engine.I wish I had gone with the 4:10's now but oh well,it is what it is.Maybe next year...

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12/16/06, 04:38 PM

#32

The Reverend

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Could I get a price range of what 4.10s installed on a Manual transmission might cost? How many book hours is it?

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12/16/06, 05:02 PM

#33

tom281

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I paid $169 for the FRPP 4.10 gears, and about $300 for the installation at a local mom & pop shop.

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12/16/06, 06:21 PM

#34

ChevyKiller

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Quote:

Originally Posted by 94tbird

Uh - that would be correct. 25% for C4's and AOD's...don't know about the math though...lol

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12/16/06, 06:31 PM

#35

Greywolf

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Engine hp is almost meaningless it is rwhp that counts so 322 rocks.

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12/16/06, 08:48 PM

#36

Enfynet

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Quote:

Originally Posted by 94tbird

its not 5mph faster in all gears. 1st gear is about 5mph slower, second is about 9mph slower, third is about 14mph slower, and 5th is about 27mph slower. this is at 6000 rpm for all gears. reference the chart

Yay that's my chart!

Quote:

Originally Posted by Silverfox

Does anyone have the spreadsheet for the 5 speed auto with the stock 3.31 rear for a comparison of the change to 3:73 ?

If you want to see the numbers for different gearing you can change the [3.55] [4.10] [4.30] to different numbers, although I'd keep the 3.55s there for comparison sake. In your case you can change the 3.55 to 3.31 and the 4.1 to 3.73 as that should be about what you're looking for. You can change tire size as well for those running 235/50-18s instead of the 235/55-17s. I also included the gearing ratios for the 3 transmissions and you can put those in under the "1st 2nd 3rd 4th 5th" line.

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12/18/06, 04:42 PM

#37

nonsensez9

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Quote:

Originally Posted by Error404

might be a bit off topic, but does anyone know if going from stock gears to 4.10's actually make the car faster in the 1/8 mile, or 1/4 mile, or 0-60? My car sure feels like it has alot more pep now, but I wonder if it's actually much quicker? I don't race or drag race, so I don't really know.

hasn't helped my 1/4 times. I'm not sure about the 1/8. I've never really paid attention to that number.

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12/18/06, 05:27 PM

#38

official_style

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dont they hurt the 1/4 mile times since you have to slam it into 4th?

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12/19/06, 05:54 AM

#39

tom281

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Well they don't seem to help my times on the factory Pirellis, being as I can't go WOT until after after getting into 3rd gear. Anymore than that, and I just spin thru 1st, 2nd, and into 3rd.

17" ET streets coming this spring....... YES!

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