Who has 3.73's with a blower??? Help me out

UnderPressureGT

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#1

• Dec 14, 2004

• #1

Ever since i went to the track, i thought i was running out of gear.... by the end of the track, i would have to shift to 5th, but rather then doing that, i rode out 4th gear hard right close to the limiter..... I thought it was typical for my stock clutch to slip like that

I then replaced the clutch with a Spec Stage 3 and upgraded the blower to an S trim putting out 3 more psi of boost... it grabs alot stronger!!

Today, a bunch of people arranged a street race with me and this one kid... We all went down this 10 mile long road with nothing but trees on both sides...

The first car, i had to actually shift through 5th and ride it for a bit till it was over.....

Same with the second car.. I was in 5th gear.... this is killing me here!

I would think going down to 355's would help, but then what happens when i add a set of heads/ and a cam? wouldnt i be in the same boat??? Im thinking taking a drop down to 3.27's.... what do you guys think??

 

giddyup306

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Oct 22, 2002

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#2

• Dec 14, 2004

• #2

4th to 5th is too steep of a ratio change to accelerate in a race. Get a TKO road race or something.

 

Mike86Stang

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#3

• Dec 15, 2004

• #3

Here's a general guide for ya ...

4th gear @ 6000 rpm with a 3.73 gear is 128mph roughly with a 26" tire

same scenario with 3.55's that number goes up to 135mph...

So unless you now have a mid 10 second car with stock heads ...or your tires too shortthe 3.73's are fine ya douche ...

 

L

L8 MUSL

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#4

• Dec 15, 2004

• #4

I have 3.73's, a blower and I go through the traps in 4th at about 5500 rpm.
Are you short shifting the first 3 shifts?

 

old_blue

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Nov 3, 2003

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#5

• Dec 15, 2004

• #5

ride out 4th gear then shift into 5th on a stock t-5?? your traps should be way higher then! I agree with MSTANG, you would have a car that would run 10's. Are you getting traction on the launch? have seen a lot of guys short shift the first 2 gears and get close to redline into 4th, but never shifted into 5th. I hope you figure it out man!

 

D

Darkhorse845

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Dec 15, 2004

#6

• Dec 15, 2004

• #6

In your case you would be better off with
3.27's or 3.55's!

 

UnderPressureGT

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#7

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i dont know guys... this seems like a freak situation... im nowhere near the 10's but if i had to make a good guess, i can pull a low 12.... i did short shift 1st, that was is.. I dont know why i have to shift to 5th!

 

Michael Yount

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Apr 10, 2002

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#8

• Dec 15, 2004

• #8

Is it possible you guys were racing for longer than a 1/4 mile?

 

flyinghi3

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#9

• Dec 15, 2004

• #9

first off you should not be racing on the street. even that i used too when i was younger now i realize how dumb it is. but any way take it too the track. there you would be able to tell what you are going threw that traps at, and in what gear. doing it on the street is not the same as the track. I have 3.55's in mine and i go threw the traps at around 5300rpm. i wish i would of went with 3.73. are you still running with a stock tranny? if you are, when that stock tranny blows up and you go for something new like a tremic, the tremic has a different gear ratio the the stock one does. are you running slicks at the track? 3.27's i would think is to low to go with.

 

subtlebeast

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#10

• Dec 15, 2004

• #10

What rpm's are you at? Is it the stock tach? Stock tach's can be off quit a bit.

 

UnderPressureGT

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#11

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Michael, it is very well possible that we were.. at least it felt that way, soo i guess that could be it... But when i went to the track, and i could guess what rpm i was at, i would say it was damn near close to the limiter in 4th..

flyin- there is a road by me that people have been street racing since i was born... it is a 10 mile road with nothing but trees on both sides and a car doesnt go down there for hourssss.. Its not like im doing it on a huge public highway. Yes i am running with the stock T5 with 275/40/17 BFG drags on the back

subtle- this is pretty stupid, but my stock tach broke soo all im going by is SOUND... until xmas comes and i get a phantom tach, i really dont know my rpm, just going by sound

 

X

xplo89gt

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#12

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FiVeLiTeR87GT said:

subtle- this is pretty stupid, but my stock tach broke soo all im going by is SOUND... until xmas comes and i get a phantom tach, i really dont know my rpm, just going by sound

Click to expand...

I think this ends this thread.

 

NoSloCoupes

"I would do anything for a FREE muffler"

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#13

• Dec 15, 2004

• #13

Agreed. LMAO.. guessing where you rpms are and you wait until 11 posts in to say it! Get a tach man, there is no way your running out of rpms with the 3.73's.

 

1986LX2002

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#14

• Dec 15, 2004

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Doh!

 

1990Coupe

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#15

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thats some funny *****....

 

UnderPressureGT

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#16

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Well i was hearing some noises like a pop when i was shifting high... not sure if thats the limiter? or just another bigger problem hmmmm... guess im gonna have to wait another week to see what happens!

 

X

xplo89gt

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#17

• Dec 15, 2004

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Keep racing without a tach until then!

 

L

L8 MUSL

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#18

• Dec 15, 2004

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Tach?

I was counting the wheel revolutions, multiplying by the gear ratio and then adding them up in my head as I went through the traps.

Isn't that what you guy's do?

 

D

Daggar

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#19

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subtle- this is pretty stupid, but my stock tach broke soo all im going by is SOUND... until xmas comes and i get a phantom tach, i really dont know my rpm, just going by sound

Click to expand...

Well i was hearing some noises like a pop when i was shifting high... not sure if thats the limiter? or just another bigger problem hmmmm... guess im gonna have to wait another week to see what happens!

Click to expand...

Jackass!

 

Mike86Stang

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#20

• Dec 15, 2004

• #20

Dude...