Thirdgen89GTA

iTrader: (5)

Not all IROCs had the L98. IROCs could be equipped with the following in various years:

• LG4, 155hp
• L03, 170hp
• L69 Man, 190hp
• LB9 Auto, 215hp
• L98 Auto, 230-245hp.

This is why the IROC, Z28, and Trans Am nameplates mean nothing in terms of performance. The only guarantee you got was that it had a V8, nothing else.

Its why seeing a clean, well built RS doesn't bother me.

ninetyone

iTrader: (2)

Then he must have raced an L03 or something.

Thirdgen89GTA

iTrader: (5)

You assume that each one could run like that. I've seen 15 second L98 GTA's barley trapping 90mph. And I've seen them trap trap 97mph before at low-low 14s too.

Thirdgens were all over the place performance wise. GM should have stuck the L98 in every TransAm and IROC/Z28 there was. Do it like the 4th gens. You get a V6 and a V8, Not 10 different models of each. They'd have a much better reputation on the street with the average person if that were true.

ninetyone

iTrader: (2)

You are right there. The 4th gens were easier to spot out. You either had a v6 or the Corvette cousin.

LTL_DMON

iTrader: (1)

SOME of the IROC-Z that came with 350 had 245hp yeah... but not the ones that came with the 305, some of the 305s only came with 190hp... and don't kid yourself, any car that isn't kept up will lose hp and get bogged down after 20+ years.

ninetyone

iTrader: (2)

Mine still beats cars that came factory with 240 hp.

LTL_DMON

iTrader: (1)

1. Not a guy
2. The owner of that IROC-Z is a member here if you want to ask them about it
3. I didn't say beat, I just was able to stick with it.
4. You give WAY too much credit to these cars... a GTO would KILL the best stock IROC it more then doubles the horse power of some of the IROCs

ninetyone

iTrader: (2)

05 and up GTO's made 0-60 anywhere from 6 seconds flat on down to about 4.7 seconds. Why would someone want to waste their gas on a Chevy Aveo anyway?

Shadow Z

iTrader: (2)

I'm gonna have to side with you here. 1999-2004 GT's are underrated by about 10 HP stock, they typically put down 230 RWHP, around 270 at the crank. With my exhaust setup, CAI, tune, I imagine I'm pretty close to 300 at the engine, and you stayed with the Mustang pretty good. Plus it has 3.73 gears and a good driver in it.

I just don't see something like a Vibe staying with an L98 IROC. What's the Vibe have, like 160 horsepower?

This is kind of silly.

ninetyone

iTrader: (2)

I think the Vibe has more like 110 hp?

Thirdgen89GTA

iTrader: (5)

A recent Vibe could probably hang with a LG4 IROC cause those only had 155hp and are doubtfully making near that right now.

Heck, a LG4 IROC would probably lose to a 3.1L V6 Camaro. There is only a 15hp difference and the V6 had better gears and is about 150lbs lighter.

Shadow Z

iTrader: (2)

I just looked it up and a new one has 158 HP and 162 LB-FT of torque. Only thing it's got going for it is that it's actually a little bit lighter than an IROC, about 3,100 pounds.

ninetyone

iTrader: (2)

Again, people assume just because a car is new, that is going to faster due to being somehow more "technologically advanced". LOL. I actually had a girl in a new Aveo try and race me at a traffic light. Need i say more?

Shadow Z

iTrader: (2)

Did you let her win and get her number afterwards?

ninetyone

iTrader: (2)

The first race , i didn't even realize we were racing.LOL

ninetyone

iTrader: (2)

LOL. I had my wife with me in the car.

LTL_DMON

iTrader: (1)

The 2006 GTO can do the 1/4 mile in about 13 seconds that's 1.4 seconds faster... a second on the track is a lifetime. I'm not knocking the IROC at all but you seem to spewing crap that just isn't all true.

Shadow Z

iTrader: (2)

Well, everyone knows that it's made up anyway. That Aveo walked you since it's newer, more technology. Their radio with an Ipod input jack is what gives them the edge.

LTL_DMON

iTrader: (1)

lol, dude, you have no idea what you are taking about do you?

I didn't say it was an L98... it's not nice to put word in my mouth, tisk tisk.

Shadow Z

iTrader: (2)

I swear to drunk occifer I'm not god.

Shadow Z

iTrader: (2)

He actually had a point. The first generation Vibes had 132 HP. That's not too far off.

ninetyone

iTrader: (2)

Uh, i just looked it up and i was close. Is it actually 108 hp. That is the ecotec Inline 4. Chevy Aveo. That is the only engine size it appears.

Shadow Z

iTrader: (2)

ninetyone

iTrader: (2)

Sorry i was looking at Chevy Aveo not Pontiac Vibe. L98 Thirdgen car looks to make almost double the torque as the vibe though. Sorry to say

Thirdgen89GTA

iTrader: (5)

Thats a significant difference over some thirdgens. A LG4 IROC is going to have a serious problem against a new Vibe. Any of the Cobalts with the 170hp n/a ecotec would Murder one. Most ford Focus's would too.

You should come up by us, where my 13.3 1/4mile second GTA is the SLOWEST in the club by almost a full second. Technology is making HUGE leaps in performance every generation. "Special" technologies like VVT, D.I., Variable Intake tracts are making their way into every engine design. VVT broadens the power curve, so does variable intake tracts. Direct Injection allows for increased compression so you get more efficiency out of the engine.

But those are the obvious technologies. What you don't see are advancement in casting and moulding technologies that increase cylinder head flow, or promote better, less detonation prone ignition allowing increased timing to make more use of the power stroke.

Rumors are the Gen5 SBC design will use DI, and VVT with a cam-in-cam design allowing for full timing control with a cam in block engine.

As an example. A iron L98 head flows about 175cfm on the intake. A cylinder head like on my 3.9L V6 in my GTP flows over 250cfm! And this is with 1.87" intake and 1.52" exhaust valves! Compared with a larger valve in a SBC head that is a VERY impressive number.

LOOK at this flowchart.

LTL_DMON

iTrader: (1)

So wait, wait what you do is find the highest hp for the IROC and the lowest number for the Vibe lulz... you are too funny.

Shadow Z

iTrader: (2)

Fortunately for me, the IROC has been sitting in the garage with a couple thrown rods, and I've been driving the Mustang. It's a shame that I'm not even really relevant to this conversation. I have a carbed 1st gen 350 SBC in my IROC, that I believe was originally from an older Suburban, which would have it making a little over 200 HP and 300 LB-FT stock.

I should throw an LML Duramax diesel into the IROC, so that I have close to 400 HP and over 750 LB-FT of torque. Some of them manage to sound like a gasser V8.

Thirdgen89GTA

iTrader: (5)

I had an L05 engine in my GTA once with the TPI on top. It could only manage 15.3 @ 87mph. Now its trapping 16mph faster, wow that sounds like a big difference then!

Shadow Z

iTrader: (2)

You guys are all silly for messing with gas engines! I'm ripping out my 350 and replacing it with a Duramax diesel! Then I'll rip out the Mustang's 4.6 and replace that with a new 6.7 Powerstroke! 800 LB-FT of torque and probably over 30 MPG!

This has been a pretty fun topic.

dakotaram

iTrader: (3)

Hi boys....and Tribute....lol

Yes, I have an IROC-Z, LB9, 305. And, yes...she did get me in top end, and definitely kept with me in the beginning too! Now, sorry to admit though....my baby needs lots of work.

I just spent all day on it today replacing the EGR and Fuel Reg, because both diaphragms were spent. I was seriously dumping fuel back into the intake, and lost a LOT of power.

WE WILL UPDATE YOU ON THE NEXT GO AROUND!!

LTL_DMON

iTrader: (1)

lol, don't worry, next time I'll bring my Trans AM... I can't wait to see your Camaro back to 100%.

dakotaram

iTrader: (3)

I wasn't denying what you said, I was seriously giving it my all and you had me in a couple spots. I just had to throw in there, that there was a valid reason. I think the newer cars have many positive attributes, but the IROC was well above its technology back in the day. Before all the problems of late though, I did give a new BMW an attitude for sure when he couldn't hang - and yes, as said throughout this thread...he started it. So not all new cars are ALL that.

I give your Pontiac props, and still sometimes wish I would have gotten the G8 with the 6.0 instead of the IROC, but I wouldn't have had all this fun restoring the Z every weekend. That G8 screamed!!!

I can't wait for your bird to get 100% too. That WILL be fun.

Convoy25

iTrader: (3)

G8?

and there more variables to a faster car than just horsepower ratings (which numerous ones are underrated, LS1s and the ecotecs for example.)

84firebird383

I like your thinking. I know there was a early or mid 90's mustang with a duramax that did drag week a few years ago and ran hi 9's and averaged about 34 mpg.

charlie31603

iTrader: (10)

Hahaaha. This thread makes me laugh. Really? Only a new GTO can beat the almighty IROCZ. I'll tell you what. Not only can my 1999 Pontiac Montana minivan pretty much destroy that IROCZ(No offense). I can probably out run your "vette transplanted" Firebird.

I have an almighty IROCZ with the "vette transplant" motor. Hell it was actually the same as the stock 350 I pulled out, casting numbers and all. Oh well, live and learn. Has the 113 aluminum heads, TPIS miniram, Comp cams something or other(don't remember, but it makes the car lope. lol). Should be good for 420hp. But I don't race it. It's not all that fast. I drive it for the enjoyment. Tops off, running trough the gears, gmmg exhaust blaring and it's kind of fun to throw into a corner. All while the car is looking sexy as hell doing it. These cars are seriously outdated even modded. Why do you think GM stopped making the SBC for new cars and went with something else. A friend has an 02 firehawk with just bolt-ons made 352whp. Another friend has an "almighty" IROCZ with a 383 with slightly higher compression, TPIS miniram and cam, Trickflow heads. And he made 377whp. All that work and he made only 25whp more then the newer "just bolt-ons" motor. And now the Firehawk just slapped on heads and cam, adding another 100whp. It's all in the technology, pure and simple. Or cars are now like the old school muscle cars of the 60's and 70's. King of the hill when they were new, but good for nothing more then a Sunday drive now. I drive my IROCZ for what it is. A classic I enjoyed since I was a kid. If I wanted something just for speed, it sure as hell wouldn't be this car.

Shadow Z

iTrader: (2)

Yeah well, I have an LP640 Murcielago V12 swapped all wheel drive IROC. UR turbo setup with a built engine, makes 1,100 all wheel horsepower on pump gas and is perfectly streetable. But I get beat by stock IROCs all the time.

Thirdgen89GTA

iTrader: (5)

I was going to post a big long stretch about the smart people and the ignorant people. But I found a better way.

STOCK 2011 V6 Mustang at the strip. 14.3 @ 98mph. BONE stock.
http://www.youtube.com/watch?v=UPcp0Dptt_A


How does 13.16 @ 108mph in a new V6 Mustang sound? Sounds like its faster than a L98. With a full bolt-on L98 trap 108mph? NOPE. Could it run a 13.16? Yep. Not at that trap speed though.
http://www.youtube.com/watch?v=_psJn...eature=related

Wake up. the new base model V6 is going to trounce the average thirdgen. These cars are running mid-high 13s with good drivers over 100mph.

There is nothing wrong with owning and driving a stock thirdgen. There is something wrong with faithfully drowning yourself in the belief that its still the fastest thing on the streets.

How about one more? A stock Civic SI this time. 14.1 @ 99mph with only the spare tire gone. This is not a fluke, or a factory freak. Thats what these cars run.
http://www.youtube.com/watch?v=fhWtt...eature=related

80srobot

These cars stacked up pretty well in the '80s. I rarely see guys on '60s and '70s F-body forums comparing their cars' bone-stock performance numbers to 2005 Mitsubishis and Hyundais they wouldn't be caught dead driving anyway... Why do we do it so often? And needless to say even the cheapest base model 2011 Camaro/Mustang/Challenger/etc makes more power everywhere than our cars.

I'm used to riding sportbikes so even 911 Turbos feel pretty damn "slow" to me... Our bikes are low 10s bone stock w/ warranty and hit high 8s with a grand worth of mods. They run rings around the hottest bigblock on this site and could hang with open wheel racecars on a roadcourse. Apples & oranges? Exactly.

Stock 3rd gens definitely aren't fast by modern standards but they're still one of the funnest cars to drive. Stock acceleration means essentially nothing since any truly fast car is heavily modified (or has a $200,000 MSRP). 13 seconds may blow away 15 seconds but it's still not exactly "fast".

You can't really modify a boring car into being fun to drive though. I had a G6 GT as a rental recently and... Boooorrring...

ninetyone

iTrader: (2)

This thread makes me laugh. Really? Only a new GTO can beat the almighty IROCZ. I'll tell you what. Not only can my 1999 Pontiac Montana minivan pretty much destroy that IROCZ(No offense). I can probably out run your "vette transplanted" Firebird.

How you gonna beat me with with your minivan.LOL. Seriously, a bolt on L98 WILL WALK on any new v6 car out there. So, your Pontiac Minivan would win if you lined it up to a new Nissan 350Z at a stoplight or a Porsche Boxster or an Infinity G37S, Those 3 cars cannot beat me for a fact , how about your Minivan giving a new Mustang 4.6 GT a good run for its money? so i don't understand where you are coming from. Well, maybe your Mininvan has twin turbos and a V8, hahaha, You should probably learn a little more about cars before you post on here my friend. Obviously you know very little.

Street Lethal

iTrader: (16)

You have a lot to learn. The efficiency and velocity of the incoming air flow will dictate how much fuel we can consume, which gives us our horsepower, and it has nothing to do with how many cylinders we're running, nor their actual size, because what good is a small block if the air isn't getting in. You can bolt on all you'd like, but bolt on's won't allow for more air over what the engine is already capable of, they just enhance it, but the air still needs to make it's way through a poor and restrictive cylinder head design, as well as a small valve. Yes, the potential is there to unlock. But stock w/bolt on's? What good is bolt on's if the engine can't breath over 4500-RPM anyway? Don't get swept up with the old adage of torque being king, because it isn't, and if your L98 needs bolt on's to walk any new V6 out there, that isn't really saying much, especially when any new V6 can also utilize bolt on's. Then what, a head and cam swap to walk a new bolt on V6....?

charlie31603

iTrader: (10)

Opti-spark is bad, replace it and you should run 9's. But you will still need to watch out for bolt-on L98's. Those are seriously fast cars! lol

I give you an A for effort. But it looks like your hail-marry pass didn't get received. New stock basic cars are dang fast compared to are thirdgens. A friend rented a new Mustang v6 convertible last month. Only 4xx miles on it. And it had some serious go for what it is. Honestly I don't even bother anymore on making my IROC fast. It's kind of useless with the stock platform. I just drive it for the enjoyment.

Exactly. Compared to today's cars. They are slow. I rented a new Camaro SS and even that was kinda of slow too, compared to what is really out there.

Hahaha. A bolt-on L98 WILL WALK "ANY" new v6 out there. Hang on, let me quote you real quick, there it is. lol. And as far as you beating those cars. Perfect example is when I beat that viper in my Camaro years ago. He wasn't evening trying. So I won, because I was racing! Or when I raced my friend's 04 modded Cobra on the interstate. He raced me in 6th gear, acceleration with cruise control. But I won! lol. But yes my minivan could probably keep up to a newer 4.6 GT Mustang. Never tried. You just don't know how hard it is to try and get someone to race a minivan. lol. And no it is not a twin turbo v8. It's just a modded 3.8 supercharged V6. And it likes the boost!

Oh. And thanks for the PM. Perfect sig material right there.

freaky

the new cars are nice . my 05 srt4 with the stock turbo an tuned tune on 23 lbs. of boost run dead even with a ls1 camaro with nothing done but exhaust . it was a drivers race . the weight was close because i had a passenger an he was by himself .
but i also raced a ls1 camaro that was turbo'd an running nitrous i was by myself an he had a passenger an he destroyed me when i hit 140 he was so far ahead of me all i seen was two red dots of his taillights .he was a good 1/8 mile ahead of me or more from a 50 roll till i babcked off at 140 . worst i ever lost in a street race .

ninetyone

iTrader: (2)

uh, even your 3.8 supercharged will not beat me dude. Just ask ShadowZ , another member on here, he and I raced our cars. Him , with his slightly modded 4.6 Mustang GT w/373 gears, and me, with my bolt on L98. His modded Mustang did happen to stay a couple car lengths ahead of me after about 80 or so. There was actually one of those 3.8 Grand Prix GTP supercharged cars wanting in on the action. I left his *** in the freaking Dust! The 3.8 Supercharged could not pass me, let alone catch up to me. So, maybe you are losing in your thirdgen , cause you have the failed driver mod, idk, and for the record a 4.6 Mustang Gt would lose you in your minivan. You would not even see the tail lights anymore. I guess someday you will find out. LOL

charlie31603

iTrader: (10)

You know what. I am not even going to argue any more. Just please forgive me for ever doubting the awesomeness power of the bolt-on L98. And we'll just both agree on that you are an idiot. And leave it at that. Okay.

whitedevilTA

iTrader: (8)

Your L98 would have no chance against this 3.8 supercharged buick regal.

http://www.youtube.com/watch?v=wwRmPPo5ohQ

Stock they are decent but modded they haul *****. The regal in this vid has a stock supercharger off a newer grand prix and some more boost along with a cam. It traps 107 mph in the 1/4.

Newer V6's move out. The technology now is unbeatable and the L98's were impressive for being an 80's engine, but these days it doesn't take much to be quicker.

ninetyone

iTrader: (2)

Uh, I used to be into boost. I had a turbo zx ,v6. My L98 car is faster. V8 is still faster despite technology. The Gm 3800 supercharged engine is not as powerful as the L98. I have beaten buick regal 3800 II supercharged, Grand prix gtp's. They are only v6 engines.

BlueZee28

iTrader: (30)

A guy I know (he was on here but was banned recently), has an L98 IROC-Z with a few bolt ons and he raced a BONE STOCK G8 GT from a dig and a roll, and got walked BAD. The G8 is what most would consider a heavy tank, has the same motor as the 05-06 GTO referenced above and smashed the Camaro. Wasn't even close...


My sister has a Grand Prix GTP that would trample on most bolt on L98's on this site. With a cai, pulley, exhaust, and a tune it has beaten some LT1 fbodies before. And don't even try telling me the L98 is better than an LT1, because then we will really know you are talking out of your butt.

ninetyone

iTrader: (2)

Of course if you raise the boost on anything it is going to make more power, and i know from experience that boost is "where it is at" , but stock gm 3.8 supercharged against my bolt on L98. The L98 would win. My particular car is in Lt1 territory. Yes, technology has advanced but displacement usually still wins.

BlueZee28

iTrader: (30)

Her GTP is only running on 8-9 psi. She has. Boost gauge...stock is like 7 maybe? Not much of an upgrade, just better technology in the 3800 than TPI...



Here's the video I found. During the 30mph roll you can hear the G8 let off. At that point he said he was kind of wanting to screw with the camaro a little.



Bone stock G8 GT vs L98 Camaro with some bolt ons.

http://www.youtube.com/watch?v=PY05L...e_gdata_player

BlueZee28

iTrader: (30)

I just realized that the person that started this thread is the iroc in the video I posted lol