I got to the lights right beside a 4th gen with ram air (not sure the year but it must have been 98 or newer). ANy way he calls me on. SO the light goes greem and I take him off the line (we both spun pretty good). I get about a lenght on him then at about 50 mph he starts to catch up, then he passes me at about 70 mph. If we were to run the 1/4 he probably would have got me by a length and a half. I think he was stock, expecpt for exhaust. I'm not happy with the race outcome, but I'm not disapointed either. How fast are the ram air 4 th gens?

 

fast

 

my buddies 02 ram air ta.. ran 13.4 bone stock

 

Yeh, I guess I did OK, Those ram air cars rip **** top end from what I seen of this car.

 

Mine also ran a 13.4 @ 103 stock.

But sorry guys...no ram air hood/17"ers

-Doug

 

I don't know much about the 4th gens, but don't the ones with ram air have a more powerful engine? or is it the same engine?

 

I rode in a '98-'99 Ram Air Trans Am not too long ago. That biznitch was fast!! It would get to 100 quik as ****. (trust me)

 

The engine is the same.

The only major differences on the cars are...

exhaust- a less restrictive cat back system (5hp maybe)
airbox- a better flowing airbox (10hp maybe)
17" wheels w/p275's - mostly for handling but help for launching
All autos get 3.23's (90% do anyway)
hood- obvious by looking at the car, but not true "ram air" on any models (look at airbox)
badging- ws6, SS...

The reason I say "maybe" when talking about hp, is because GM's ratings are way off anyway. Most WS6/SS's are running maybe a tenth or two faster off the line. These option packages are more for appearance, which I definetly respect. The hood does look mean, and the wheels make the car look more aggressive.

-Doug

 

OK so what does GM rate these motors for HP and tourque?

 

They are rated slightly different based on year.

98-00
Z28/Formula/TransAm - 305hp, 330ft/lbs
WS6/SS- 320hp, 340ft/lbs (?not sure on torque)

01-02
Z28/Formula/TransAm - 310hp, 335ft/lbs
WS6/SS - 325hp, no idea on torque.

The differences in 98-00 cars and 01-02 cars comes from slightly different exhaust (cats/y-pipe), cam profile changes, computer changes, and 01-02 cars get the LS6 intake. The intake probably makes the largest difference in the real performance of these cars.

But keep in mind these ratings are way off. I know a few M6 guys who dyno'ed 300rwhp stock. Factor in 17% drivetrain loss and you have 351hp @ the flywheel .

-Doug

 

Not to change the subject, but Low C1500, in your sig it say's...

Best Gtech time 14.17s @ 104mph @ 0 deg Celcius @ 4300 ft. Alt.
NHRA Corrected time 13.44s @ 110mph
(Gtech is a little high on mph)

How is this corrected 13.44? Have to ran it at the tarck and do a 13.44, or just going off G-tech.........

 

He's going off g-tech times. I'd like to see him race me. He wouldn't have as easy of a time. And doug how could you forget the firehawk 345HP!! Actually they just change the ratings on the car. You can get the SS with the same options from what I hear. With the SLP dual/dual exhaust like I have and the better airbox which still is horrible. I fixed that though by ordering a whisper lid and K&N is already in there. It's good though I don't have to buy a catback it's all 3" mandrel bent stainless steel right from the factory, can't argue with that.

 

PoleCat, I guess you've never heard of altitude corrections? NHRA says if I were to run at sea level that it shoud be 13.44s.

And I didn't say the 4 th gens weren't fast. I did get beat you know. And maybe the guy I raced couldn't drive a stick that great. As soon as you guys read truck you think slow, but I know I'm making close too 400hp at the fly, but I do loose alot going through that big 700r4.

And CobraKiller, when I go to a 1000cfm tb, and multipoint, I think I'll be taking out stock 4th gens, but as of now I still loose.

 

Yes, since I am an avid racer...but I'd like to see real times at the track...with the combo, sorry, I just don't see 13.44's even at sea level.....G-tech's can be forgiving...IMHO
So don't take me wrong, you have a great strong combo there, but on my Dragstrip Plus program, this is what i came up with:

3800 lb truck
1 5/8 headers and 2.5" duals
roller cam(didn't know for sure, so used roller) with 270/280 adv. and 230@.050 and .500 lift, 1.6 roller rockers
1.94/1.60 valves, ported with 10.7:1 compression, hypereutectic pistons
100-105 octane fuel used during run,injected
3000 stall, and 3.73 gears, and 27" ET Streets
Airgap intake, ported and matched
10% converter slippage
200 lb driver
shift point at 6283 RPM's
RPM's at finish line is 4742 RPM's.
at a 4300 altitude, shows a 14.68 @92.8 MPH
at a 3000 altitude, shows a 14.40@94.5 MPH

So don't get me wrong, good strong setup. Just the G-tech's can be very giving, and not show what a vehicle may actually do. Take it to the track for real times, and read the timeslip, then make adjustments off that. But a 100 HP shot can get you into the mid 13's............good luck.

 

I do agree that gtechs are not the best. I won't be able to have a track time till next summer as I just moved, and don't even know where there is a track. I know Gtech is way off on MPH, but I know lots of guys that do run within the 0.1 sec gtech vs. track. My truck is more like 4300lb, but may I suggest that your program doesn't factor in head flow numbers. I never got my heads flowed but I have seen numbers for them. So with my combo entered into Desktop Dyno, the program says 395hp, and 425 ft lbs. I don't trust the 1/4 mile programs at all, but I do get between 13.4 and 14.0 secs when I punch in my weight and power. But this all has a huge margin of error. So i'll keep using gtech numbers until I get track times.

 

yes, it has area of ported, and I made it 'generous' on the porting side. Still keeping the 1.94/1.60 valves. 4300 lbs will only hurt the ET as well. And this program shows a gross 395HP, but at 1000 ft latitude, and now a 4300 lbs, a 14.75@92.4 MPH.

get track times and let us know so we can compare ET's...
later!

 

Go to any of the numerous online 1/4 mile time calculators, put in 4000 - 4500 lbs. You'll see much different numbers.

 

I did, several, shows a mid 14 pass with 395 HP and 4300 lbs...but hey, if you think you can do low 13's with 395hp, I'm fine with that.....

 

Have you though about getting an exhaust cutout? For the price, it's an exellent bang for the buck mod on LS1's.....

 

Polecat,

Just thought I'd let you know that when the 86 iroc came out it ran a 14.5s pass. It only has 220hp, and It is almost as heavy as my truck. I still don't get why your convinved that I can't get into the 13s.

 

Hey Hart, I mean Low C1500, you might be able to run a 13, if you come over to my place I'll help shovel the grain out of the box and that could save you a couple hundred pounds or so. Oh and as a side note Doper can hardly handle it when we play xbox over the net.

 

Just seen many trucks like that with 350hp or so still run low 14's to high 13's...trucks are very hard to get fast, much less low, low 13's...not saying they can't, just need alot of HP and TQ to do it...seen a ton this weekend. Just got back from a car show/ drag. And i saw a 69 Chevy with a 454 roller motor, 3.08 gears run 13.07 with 100 HP..motor was stock GM crate 454, easing traction a tad..but good times for a full size truck.