Street Racing & Kill Stories Basic Technical Questions & Advice

who wins this race...........

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Old Sep 3, 2011 | 02:27 PM
  #21  
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Traction will win !!!

Get some vids
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Old Sep 3, 2011 | 03:30 PM
  #22  
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Why would you guys even entertain this idea? If he was racing a Mustang then the new stock 5.0 would win hands down!!
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Old Sep 3, 2011 | 03:39 PM
  #23  
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Originally Posted by ULTIMATEORANGESS
im going to go with your car. how come you only have 3.08s?
I have 3:73 gears now.....but was told that 3:08's would be best for roll races 50-160mph.

NO?

.........
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Old Sep 3, 2011 | 03:41 PM
  #24  
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Originally Posted by LS6427
I have 3:73 gears now.....but was told that 3:08's would be best for roll races 50-160mph.

NO?

.........
NOOOOOOOOOOOOOOOOOOOOOOOOO!! Depends on your setup as to what gears work best but your not racing to 200+mph.
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Old Sep 3, 2011 | 04:06 PM
  #25  
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Originally Posted by odarabla
NOOOOOOOOOOOOOOOOOOOOOOOOO!! Depends on your setup as to what gears work best but your not racing to 200+mph.
What info do you need to find the best gears for me.

4L80E...3200 stall...shifting at 6,200-6,500rpm

I was given this, I do not want to shift to OD while racing. So I figured 3:08's up to 160 mph would do it for me.

......1st/2nd/3rd
3.73=45/86/139
3.23=53/99/161
3.08=55/104/169
2.73=62/117/190

.
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Old Sep 3, 2011 | 05:57 PM
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Originally Posted by LS6427
What info do you need to find the best gears for me.

4L80E...3200 stall...shifting at 6,200-6,500rpm

I was given this, I do not want to shift to OD while racing. So I figured 3:08's up to 160 mph would do it for me.

......1st/2nd/3rd
3.73=45/86/139
3.23=53/99/161
3.08=55/104/169
2.73=62/117/190

.
Is roll racing all you plan on doing? I have 4.11 rear gear with a th350 tranny but I run 28" tall tires.. Try this out

http://www.wallaceracing.com/Calculators.htm
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Old Sep 3, 2011 | 07:31 PM
  #27  
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Trying to bench race a setup you don't even have in your car yet??? Come on man, you should know better then that. Also with the lame guessing on your part about rwhp numbers that you are gonna have when it's not even running yet.

The only way you are gonna get a 4L80E stalled auto with a 440 LSx to pull 590rwhp is running a MASSIVE solid roller cam and spinning it up to 7,600+rpms. That's assuming you have some seriously badass heads too. A cam that only spins to 6,200-6,500rpms? Figure on more like 500rwhp.

As far as gearing goes, I'd recommend doing the math based on tire diameter, Drive or Over Drive gearing and then deciding what works best. Use one of millions of online calculators.
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Old Sep 3, 2011 | 07:48 PM
  #28  
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Originally Posted by Sticks n Stones
Trying to bench race a setup you don't even have in your car yet??? Come on man, you should know better then that. Also with the lame guessing on your part about rwhp numbers that you are gonna have when it's not even running yet.

The only way you are gonna get a 4L80E stalled auto with a 440 LSx to pull 590rwhp is running a MASSIVE solid roller cam and spinning it up to 7,600+rpms. That's assuming you have some seriously badass heads too. A cam that only spins to 6,200-6,500rpms? Figure on more like 500rwhp.

As far as gearing goes, I'd recommend doing the math based on tire diameter, Drive or Over Drive gearing and then deciding what works best. Use one of millions of online calculators.
Making 600 RWHP is the least of my worries. Its not bench racing...RWHP is what wins roll races, 600 is the goal. Because if my goal was 575 and I made that, same car, it would be slower than the 600 car...... Professional race teams FIRST plan their builds on paper, they talk about them, then they write them down and ask the experts whats best. Then they build. Thats bench racing I guess.

I'll be using one of two sets of heads...MAST cathedrals that a member here uses and makes 671 RWHP with his 468ci at 11.2:1 cr on 93 octane M6. Or Mamo ported AFR 245's. Both will get the job done. Sheet metal intake or possibly the same Jenvey ITB that the above 468ci has. It WILL make 600 RWHP. I need to make about 100 RWHP more than my old *** 2002 427ci....with hilarious LS1 heads, stock TB and LS6 intake to hit my goal.......it'll happen. The engine builder I'm using makes power........

So....back to the important part......gearing for 50-160mph pulls.

.

Last edited by LS6427; Sep 3, 2011 at 08:00 PM.
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Old Sep 3, 2011 | 07:58 PM
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Originally Posted by odarabla
Is roll racing all you plan on doing?
YES......nothing else. It'll never see a drag track, ever. Its a fun car to do just that...have fun. It'll be a second car to drive when I can. All I like to do is occasionally roll race and hard accelerations getting on highways and on open highways by myself.

So low end grunt can be given up here for better medium - high end performance. SINCE....a ~600 RWHP car will never have low-end grunt issues no matter I do to the gearing, it'll still roast the tires....only so much you can do on street radials...... LOL I'm not into racing people at lights on city streets....open highways with no cars around is all I mess with. A street racing ticket to me would literally be disastrous to my career, just one......not going to happen. I drive like my grandmother on city streets, no dicking around, period.

.
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Old Sep 5, 2011 | 03:37 PM
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You will get walked...z06 gearing up top is insane. Not to mention the weight.
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Old Sep 5, 2011 | 04:45 PM
  #31  
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And aero
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