brad8266

iTrader: (23)

Take it easy, my best time so far is a 12.2, lol. I need tires badly, and i rarely go to the track.

brad8266

iTrader: (23)

yeah but the brief instant off the line (60ft) is what it takes to win in a lot of cases, so yes midrange and low end power is very important, unless of course you come off the line at like 5K.

brad8266

iTrader: (23)

HAHAHAHA

25psi

Because , It is better to make torque at high rpm than at low rpm, because you can take advantage of gearing.


Engine Peak HP @ RPM Peak Torque @ RPM

L98 250 @ 4000 340 @ 3200
LT1 300 @ 5000 340 @ 3600

The cars are geared identically, and car weights are within a few pounds, so it's a good comparison.

First, each car will push you back in the seat (the fun factor) with the same authority - at least at or near peak torque in each gear. One will tend to *feel* about as fast as the other to the driver, but the LT1 will actually be significantly faster than the L98, even though it won't pull any harder. If we mess about with the formula, we can begin to discover exactly *why* the LT1 is faster.

Torque equals hp*5252/rpm

If we plug some numbers in, we can see that the L98 is making 328 foot pounds of torque at its power peak (250 hp @ 4000), and we can infer that it cannot be making any more than 263 pound feet of torque at 5000 rpm, or it would be making more than 250 hp at that engine speed, and would be so rated. In actuality, the L98 is probably making no more than around 210 pound feet or so at 5000 rpm, and anybody who owns one would shift it at around 46-4700 rpm, because more torque is available at the drive wheels in the next gear at that point.

On the other hand, the LT1 is fairly happy making 315 pound feet at 5000 rpm, and is happy right up to its mid 5s redline.

So, in a drag race, the cars would launch more or less together. The L98 might have a slight advantage due to its peak torque occurring a little earlier in the rev range, but that is debatable, since the LT1 has a wider, flatter curve (again pretty much by definition, looking at the figures). From somewhere in the mid range and up, however, the LT1 would begin to pull away. Where the L98 has to shift to second (and throw away torque multiplication for speed), the LT1 still has around another 1000 rpm to go in first, and thus begins to widen its lead, more and more as the speeds climb. As long as the revs are high, the LT1, by definition, has an advantage.

Another example would be the LT1 against the ZR-1. Same deal, only in reverse. The ZR-1 actually pulls a little harder than the LT1, although its torque advantage is softened somewhat by its extra weight. The real advantage, however, is that the ZR-1 has another 1500 rpm in hand at the point where the LT1 has to shift.

The Integra GS-R, for instance, is faster than the LS Integra, not because it pulls particularly harder (it doesn't), but because it pulls "longer". It doesn't feel particularly faster, but it is.

25psi

Get your facts together!

SS Aleks

What the hell is this?
http://vettefbodyvideo.vidiac.com/vi...a8009f408f.htm

25psi

Whats your point?

25psi

This is why "TORQUE DOEST MATTER FROM A ROLL"


http://vettefbodyvideo.vidiac.com/vi...ab001070a0.htm

SS Aleks

I guess that means my turbo integra will easily walk all over my SS. Thanks for the link.

I finally get it. Hell my bike only has 40lbft, and it's on the edge of 10's. I just got an idea for the ultimate street car! I will take the drive train out of the camaro, and install the .6L from the R6. It will be perfect, it meets all of the requirements: no cubes, no torque, some hp, and a 15,000+ rpm redline. I bet it will go 9's if I can just drop the torque down a little and add more RPM. I bet you could get at least another 1,000 RPM out of it with cams and springs. I am sure that even a stock 300hp f-body will pull me out of the hole with the torque, but I have a whole 10,000 more RPM to go per gear. I should have no problem blowing by a V8 f-body from a roll. It will even have the sequential gear box!!! That tears it, I am selling the twin t-88 7.0L before I finish it, there is no reason to continue. Sure, it should have well over 1,000 hp and about the same ammount of torque and a 8500 RPM redline. However, since torque does not matter from a roll, and RPM is what really counts then it's not even a comparison. Also, the R6 has 175 hp/l . Duh, every one knows a .6L sport bike is faster than 1.0L sport bike.
I better get to the shop while my idea is still fresh.

25psi

Your not comprehending what I am saying and forming your own conclusion. I never once said torque in general was not important, I clearly stated that torque as a number is useless to brag about, becuase in turn, hp is a form of tq. In essence, the more rpm the more hp. Like I iterated before, thats why LS Integras or slower than Vtec models. Not becuase they make more torque, its becuase they have a higher redline.

SS Aleks

25psi:
You need to relax. It seems as though this forum has been hard on you and it's taking it's toll.

I think you:

on . So we and you then we .

Seriously, . Stop being so



Let it die, just go .

25psi

Arent you so clever, a pure genious. You cant even come back with an intelligent response to denounce my answer.

That was cute btw!

SS Aleks

Your welcome, and I love you.

I guess my point was, who cares what your opinion is. Bench racing is retarded, yet you put so much into it.

You should provide links to videos of all your cars street racing or making dyno pulls, or even racing other cars that have similar mods/ power. At least it would be a fun watching the vids.

My car N/A is faster than yours on boost.

brad8266

iTrader: (23)

No doubt man, it is better to have more power in the upper RPM's because that is where most of the race is at. I was just trying to say that some good midrange power is good too, although this power is really only used right off the line. But yeah upper rpm power is where its at for racing purposes.

Dr Octane

We all know that Clarkson is biased and opinionated, that is a given. What he and many people don't understand is the beauty of the LS series engines. It is an elegant design. It is a simple,compact, lightweight, fuel efficient design. Because it has fewer moving parts than an DOHC design, it costs less to manufacture, and less to wear out or go wrong. Being ohv, it is very compact for its displacement and fits where a V-6 used to reside (i e the LS 4). Due to its all-aluminium construction, it weighs less than many 6 cyl. and rivals some 4 cyl iron block engines. It's fuel efficiency is the best in the World, given its output (the Corvette is the ONLY car in the world to produce 400 and 500 hp with NO gas guzzler tax).

Everybody has an opinion on the best bang for the buck performance car, but a C5 ZO6 would be hard to beat. Used, they go for around 30k. They run low 12 sec(some have run high 11) quarters Stock, and are Very competent around a road course. If you are into Mods, how 'bout 600rwhp for $6995?

http://forums.corvetteforum.com/show....php?t=1573786

71camaro

iTrader: (8)

Well then I guess your next mod to your 350z should be getting rid of all your torque. Also, I would like to see pics of all your cars. Just out of curiosity.

brad8266

iTrader: (23)

Here we go now.

25psi

Weve already been through this countless of times. Do a search and you will find.

IF your referring to the Enzo, it is a JOKE for the 50th time.

25psi

What do you have/own? More props to you if you run 119traps and if you trap 133+ like the deuce than even more props. Theres always someone faster.

25psi

http://videos.streetfire.net/video/a...5501706603.htm

Brand new C6 Z06 and we talk about quality