ek9220ps

iTrader: (4)

if its a stock z28 you shouldn't have a problem. i use to hang bumper to bumper in my civic with z28's.. but it could be a sleeper. you better be careful and know what your up aginst.

rxspeed87

what year civic did you have and what year z28 did you race

z-28's have run anything from high 15's down to high 12's depending on year and motor setup

a 99 has the ls1 motor in it

325hp in a 3200-3400lb car

this car should run low 13's stock even being an auto.

granted not sure what the starter of the post is running but it shouldn't be a rape job here.

again what would the rx7 guy run.... ( sorry forgot who started this post)

scratchjunkie

dude its a z28 why are you being so *****? integra gsr's can hang with them stop light to stop light. just make sure your car is boosting right. and do it at night time. you will take off on him.

JMarasco

99 Z-28 coupe
247 ft-lb @ 4,000 rpm
305 bhp @ 5,2000 rpm
3,400 lb curb weight
6,000 rpm redline

Stock FD
216 ft-lb @ 5,000 rpm
255 bhp @ 6,500 rpm
2,800 lb curb weight
8,000 rpm redline

from www.supercars.net

The 1st gear ratio for the FD is 3.48 and for a manual Z-28 the ratio is 2.66. For an automatic that number will be lower. The 2nd gear ratio for the FD is 2.02 and for a manual Z-28 it’s 1.78. Multiply these numbers by the engine torque (at any equivalent rpm) to get the rear wheel torque. That’s why dynos run manuals in fourth gear (ratio 1:1). In first gear the RX-7 has higher *peak* rear wheel torque, in second the two cars are about equal and in third, fourth and fifth the Camaro has more rear wheel torque.

From C&D a manual 99 Z-28 runs 0-60 in about 5.2 seconds. An automatic would be around 5.4 or so. Your FD runs 0-60 in about 5.0 seconds stock.

Your buddy looks at your “low-power” rice car and sees easy money for his “high-power” camaro. He wouldn’t understand how gearing effects low end torque or how a high redline allows you to shift fewer times to a given speed despite the lower gearing. Because of the weight and gearing differences in first gear your car produces 1.5 times as much power to move each pound as the engine numbers state (when compared to his camaro). As a result *if* (hypothetical example) the RX-7 makes 150 ft-lbs of engine torque at 2,500 rpm and the Camaro makes 200 ft-lbs of engine torque at 2,500 rpm then the RX-7 is making 522 rwhp in first gear and 0.186 HP per pound of car and the Camaro is making 532 rwhp in first gear and 0.156 HP per pound or 20% more useful power for the RX-7. Your car shouldn’t be at a disadvantage even off the line. You also have the advantage off the line of dumping the clutch. Which means you can get the engine closer to the peak horsepower/torque RPM for even better launch power (3,000 – 4,000 should be good enough). If you loose, it will be because of your reflexes off the line or because you miss a shift. Your car has the *ability* to win you $500.

John

Toddzilla

Dear god, some people really have their heads up their asses.

1) Saying that an rx7 is always faster than an LS1 because you beat one on the street means absolutely nothing.

2) Magazine racing is pointless.

As mentioned before LS1 cars are, in fact, fast. With good weather, an A4 Z28 can run low 13s stock on street tires. It WILL be a close race assuming that both people can drive, and I wouldn't bet any money on it.

Jim Calandrella

I think people are smart not to underestimate the LS-1 motor. Like it or not, it is formidable. Jmarasco, you did your homework. Impressive. Toddzilla, your point of view is refreshing.
I have undying faith in RX7's. Obviously, I own one. But, the RX7 is not a hands down winner in this one. Sorry. What is consistently being reenforced here is that it's going to be close. Period. It will come down to driving. It is a true bet.
You guys that say you were able to hang with Camaro's at stop lights with Integras and Civics. Were you guys stock? I honestly (and i'm not trying to start anything here, because anything can be made to be fast, and I have no Bias towards import or American ), have a hard time believing that a stock Civic or Integra could hand with a newer LS1. That's not a diss on the Civic or the Integra, it's just that I've seen what happens when those two get together. If I was driving a Camaro and a stock Civic wanted to go for money, I would jump at the chance.
And I miss shifts

Pressurized

I wouldn't underestimate the car. My buddy has a stock 2001 LS1 and he dynoed 312rwhp and 320rwtq

redrotorR1

LS1's are fast cars. They are not to under-estimated ... nor taken lightly for that matter. I've raced a 2000 SS at the track a few times. He consistently put down mid to low 13's. I was bone stock, and putting low 14's and one, singular 13.8.

The live axle doesn't help your cause either. Like most people have already said, he'll get the jump on you from a standstill. And the other comment made about internals is something to watch out for ... it's hard to tell if that motor's been bored over and stroked out. If it were me, I wouldn't race him for money.

PolishDude

Okay here we go, this talk of totally owning him is total bs, like mentioned already they run mid 13s to high 12s stock, if he is an A4 and has a torque converter which is popular, he will pull around a 12.5...these cars are very underrated, they have to be, why would someone spend 20k more on a vette when they can by a z28 with the same engine and hp? they put down from 300-320+ rwhp STOCK, and someone that mentioned a gsr can hang with them light to light, yeah maybe if the camaro starts in 5th gear or something or maybe if the camaro runs in reverse, but even then hed still probably beat the gsr just run out of gearing early. There will be no owning what so ever, it should be a pretty close race either way

krystian

Batmobile

Well both cars are extremely fast....the hell with it...Lets just race and see what happens. I mean that is the reason why we own these cars...to race the **** of out of them. I'll give you props whether you win or loose...just for the fact that you are willing to take on a V8 monster and putting down 5 on it!

ek9220ps

iTrader: (4)

i had a 96 civic hb. i had a 98 japanese interga type r motor. lighten flywheel, 6 puck racing clutch. 2.5" down pipe. no muffer. redline @9100 rpm. mid 13. on street tires.

SilverRX7

Just an added interlude to the "why would anyone dish out for a vette when they could buy a camaro for so much less"

I think you should try to drive or even just sit in both, you will get your answer very quickly.

SPOautos

Some of you guys are clueless and its obvious you dont go to the track.

With his mods and a new intake it will come down to the driver. Both car with the same driver in the same condition would be so close its no even funny. They are both low 13 second cars.

I've raced alot of cars and I can tell you a 99 with the LS1 engine is going to be very close even with that intake. If he has any mods like gears, exhaust stuff, air lid, ported tb....any of those and your prob not going to beat him.

It'll be a good close race. Dont get me wrong you have a good chance if your car runs real good but dont get a false sence of security from some of the posts in here. They were prob racing a LT1 engined z28 that runs real high 13's.

STEPHEN

PolishDude

well yeah of course there is a difference in like suspension and comfort and all but u can get a very base z28 for around 22k, wouldnt a lot of potential corvette owners be kinda mad if a car that is half the price has the same engine and hp as theirs does. Of course for the more knowledgable buyer they kno this, but lets face it most vette owners are guys in their 40s going through midlife crisis, they dont want to think that some 16 year old punk in a car half the money has the same motor and hp as their mighty corvette

rxspeed87

well that might be a little different

the ITR motor puts out quite a bit of power in a what 2000lb car?


and scratchjunkie why am I *****? b/c I´m not going to be stupid and say the LS1 is going to get his *** handed to him... yeah so what it is a z28? a ls1 z28 is a fast car... a lot faster then a stock rx7 in the 1/4. the car is good for low 13´s easy and I have seen a stock one run 12.9 at 112 once before STOCK. I know at one time they wheren´t anything special and from what it sounds like you have the 80´s performance stuck in your head. just bc it is a z28 doesn´t mean slow. I love RX-7. I own one I waited almost a year to buy one I wouldn´t speak bad about them but a car that is running maybe low 13´s (yeha just only a z28) is not going to kill/rape/slaughter/destroy or any other term like that another car that is able to hit low 13´s and maybe even high 12´s. I would call the race down to the driver not the car cause both are from the sounds of it very well matched.

god some of you thirdgen guys seem to be stuck on your cars way too much... go ahead bring the flames on



looks like some ppl here though do there homework and realize that a z28 is a fast car and can make a good race... thanx for postin


either way I say race him, but don´t bet the money unless you have the stuff to just throw around.

ttb

even if you lose, you'll have a better overall car. just race him.

rxspeed87

just as a side note. doesn´t a torque converter have an effect of torque multiplication? remember this is an auto.

and your right about the rx7 has the ability to dump the clutch. though that is why they make high stall torque converters. that way the motor revs up a little more before the torque converter gives full power to the tranny. then there also comes up flashing the converter. I´m sure the camaro can hold the rpms at 1500-2000 rpms just fine if he wants to and that should be enough for him if not too much.

then comes the launch traction itself. IRS isn´t the best thing for launching. great for road course not for drag. that live axel is going to help him a lot off the line though. it will just keep his *** end planted on the ground. also those camaro´s don´t they even have a little more meat on the tires then the RX-7?


again don´t get me wrong I love rx7´s but both cars have there good points and bad. yes even the rx7.


either way though it´s up to the driver and him being an auto there is less chance for him to mess up then for you to mess up


just don´t put money on it

turbogarrett

iTrader: (1)

i am an fd owner and i agree with you ,ls1's are very fast. i've seen a stock one run 12.9 with drag radials. as far as handling, braking, etc , well thats another story.

Lunar7

Run him with a half tank of pure 100 octane.
That stuff makes a big differnece in our turbo cars.

Run at night when it's cool.

Drop pressure in your rear tires
(around 26-28 psi hot - check your contact patch & go as low as you can to maximize without car getting squirely under throttle)

Confirm your boost holds at 10.5-11.5 psi in secondary turbo mode under high load acceleration. (some might say to run a bit more boost but it's risky without an ECU)

Limit distance to 1/4 mile.

Launch good & shift quick.

Smoke him!

Do it soon before he adds mods.

If you have time and funds get a K&N drop in and efini Y pipe.

JonesersRX7

This race hasn't happened yet?

Just get the damn thing over with so we can quit all this bench racing bs. Then we can see who comes away with 500 crackers.

-- Eric

p.s. I could not agree more with Lunar7 --- 100 ocatane and big fatty contact patch.

Toddzilla

They handle and brake better than you think.

rynberg

Why, he's totally wrong. Running higher octane than the ecu is designed to run does not add horsepower. Higher octane simply resists pre-ignition better. The ecu will not advance the timing just because you put higher than premium octane gas in.

People run race gas in their cars when they are running very high boost with advanced timing. The car is TUNED for the higher octane gas and expects it.

ek9220ps

iTrader: (4)

i used 104 octane and i notice my turbo picked up alot fast. and this was on stock motor and no muffer.

Lunar7

A stock ECU on a modded car is not what I would call an ideal tuning situation.

Higher octane helps the combustion process and lowers engine temps.
Our over worked turbo rotarys need all the help they can get.

I always run a mixture of 100 at the track and definetly notice a difference.
My J&S knock sensor also registers a significant reduction of combustion "noise" under high load driving.

The times that I ran the stuff straight was very amazing.
It's just too expensive to do on a road course due to the high fuel consumption.
That is why I run a mixture instead.
Even my weak mixture makes a big difference.

Try it yourself if you want to see what it can do for your car.

rynberg

Lunar7: I still won't believe you that higher octane gas will give you more hp with the stock ecu. I've seen tests before on several different cars and there was no improvement.

However, I'm sure that your knock readings went down significantly and I don't doubt that the car "felt" better. I'm just trying to fight against the myth that you gain a bunch of free hp by just raising the octane.