Challenges

[Stealth01]

Elevation. Not altitude. Elevation is the distance above sea level for a spot on the earth, while altitude is the distance above the ground for an object in the air. :P

That's interesting, the variable boost thing. Should be SIMPLE for others to copy. Just add a cheap measuring device and program the ECU to react to it.

Fortunately, all of those cars, including yours, would walk mine, so I don't even have to try. LOL.

[arctic_blue83]

<div class='quotetop'>QUOTE (Stealth01 @ Apr 27 2008, 12:37 PM) [url=index.php?act=findpost&pid=43127]<{POST_SNAPBACK}>[/url]</div>

Elevation. Not altitude. Elevation is the distance above sea level for a spot on the earth, while altitude is the distance above the ground for an object in the air. :P

That's interesting, the variable boost thing. Should be SIMPLE for others to copy. Just add a cheap measuring device and program the ECU to react to it.

Fortunately, all of those cars, including yours, would walk mine, so I don't even have to try. LOL.[/b]

The only thing is, it will work better on the Caliber SRT-4, than it would on, let's say, a Mazdaspeed 3/6.... here's the reason:

Caliber SRT4
Turbo Spec = TD04HL4S-20TK32SF-11 cm^2
Turbine Wheel Diameter = 52mm
Compressor Wheel Diameter = 58mm
Max Pressure Ratio = 3.16

^^^Which, if I'm reading that correctly... it looks like the Caliber SRT-4 is running a medium-sized TD04 hotside, to take down on spool time... but I think it's running a 20G equivalent compressor housing... which would make a TON of sense why they don't seem to fall off on the top end, based on the dynos I've seen for them.

In laymen terms, a 20G is a fairly large compressor housing, even though in this case, the TD04 housing would be the limiting factor... but still, at sea level, pushing a mild 12psi of boost is nothing for a turbo this large, that's barely breathing. It's NOWHERE near it's peak efficiency range. Even 15psi isn't really pushing a turbo of it's size. I would be willing to bet, once people start really turning up the boost on these cars, they're going to see some BIG power numbers.

The point being, the Speed3/6 have comparatively small K04 turbos, not nearly as large as the CSRT-4's TD04-20G equivalent, which is evidenced by the fact that the Speed3, even with it's direct injection, and higher compression (9.5:1 vs 8.6:1), still makes less horsepower while pushing more boost- 16psi. Pushing much more than that, at a high altitude/elevation, would push the little K04 WAYYY out of it's efficiency range, resulting in hot air, making little more power (at least on pump gas and no meth/alcohol injection), and increasing it's chances of detonation. Put simply, from the factory, the K04 is pushed very hard to make stock power numbers... whereas, the Caliber SRT-4, only pushing 12psi at sea level, is barely breathing, and still has a TON of headroom. So pushing an extra 3psi of boost up here, would be no problem for that turbo.

Pushing 19psi out of a tiny K04 up here (3psi over stock 16psi at sea level), well, let's just say it's not he best idea, and would be VERY hard to maintain for the little K04, and due to the turbo having to push itself so hard, your IAT's & EGT's would be THROUGH THE ROOF with the stock intake/cats intact. Leading to little more power, and much higher chances of detonation. Not to mention it would eventually lead to premature turbine failure. Basically, in order for this "Variable Boost Pressure" system to work properly, you're going to have to run a large® turbo, and not push too much boost at sea level in order to hit peak power numbers. Running a large turbo, will produce more lag time... more lag time, often times leads to magazine editors giving poor reviews to turbo cars, as being "laggy"... which can hurt sales. So for an OEM, it's a double sided coin.

Given the relatively thin air up here (closer to 12psi ambient, compared to around 14.7psi at sea level), the stock Speed3/6, has a hard time even compressing ambient air into the same boost pressures into the same boost pressures they see at sea level. At sea level, they're rated around 16psi, but up here, most people with a boost gauge, in stock form, only see about 13-14psi, which shows the compressor having a hard time compressing the air at the same BCS duty cycles it sees at sea level. It sucks, but it's true. The only real way to remedy it, is to get some form of engine management (or a simple, but not recommended, boost controller), and up the boost, but realize pushing it too hard will hurt IAT's & EGT's, so it would be wise to upgrade basic intake mods in order to help with IAT's, and use a catless exhaust to drop your EGT's, having an intercooler with a lower pressure drop wouldn't hurt either, so you didn't have to push the compressor too hard to see the same boost pressures at the manifold. Just my $.02

[arctic_blue83]

On another note... I had NO IDEA how restrictive the stock panel air filter on a Caliber SRT-4 is, here's a guy who at sea level (no major correction factor like we have here), put down 259.6whp STOCK and 274.7whp with just a K&N filter! That's EXTREMELY impressive... and those aren't on some over-inflated, high altitude with high correction factor dyno like MAC's dyno, damn impressive:
http://www.calibersrt4.net/dodge-caliber-s...srt4-today.html

Those cars are ugly as sin, but who cares It holding more boost at this altitude, makes them a total sleeper car for those who don't suspect them, and makes sense why the highest trap speed we've seen from a stock Speed3 up here (Chris Barnett) was only 94mph, while that Caliber SRT-4 owner with only a panel filter trapped at 102mph... beware the SRT-4

[MS3_Mafia]

Wow, the SRT4's are very impressive power wise and a hell of a sleeper. I haven't seen any on the Highway to "challenge" but definately will if I get the chance... even if I do get my ass handed to me.

[Stealth01]

That's OK, they're still UGLY as the back of my nuts.

[Stealth01]

LOL got challenged last night. I was out driving around, actually trying to find a place to open up the MS6 and burn off some stress. Unfortunately, my house is surrounded on three sides by friggin construction zones. So I was headed up the Powers bridge over Woodmen, which is a construction zone, cruise-controlled RIGHT at the PSL. Pair of headlights come screaming up on me from behind and get on my bumper.

Great. I'm thinking a cop, so I just chill.

Driver tosses his car into the left lane and moves up beside me. It's a little red Sunfire, trying to show off. Oh, the temptation there was to drop it down a gear and toast him. But then I heard "K-band!" from Bitchin' Betty (that's my radar detector's name...). Two bleeps, then nothing. So I waited. Another two bleeps, then nothing. I waited again. That's typical of El Paso County guys shooting instant-on K-band.

Sunfire gets pissed and takes off over the bridge.

YAY! Rabbit!!

I let him gain about 300 feet, then matched speed. RD kept alerting as we crested, but the SUnfire turned off onto Woodmen west, while I went Woodmen East. My guess is that our friendly neighborhood SMOKEY was sitting at the bottom of the bridge. MAN I was hoping to watch that little red car get LIT UP! That would have made my night. But no joy.

[tsx_guy]

<div class='quotetop'>QUOTE (Stealth01 @ Apr 27 2008, 06:35 PM) [url=index.php?act=findpost&pid=43157]<{POST_SNAPBACK}>[/url]</div>

That's OK, they're still UGLY as the back of my nuts.[/b]

yeah that's a nice image right there thanks....

[RedRoadster]

<div class='quotetop'>QUOTE (Stealth01 @ Apr 28 2008, 05:07 PM) [url=index.php?act=findpost&pid=43315]<{POST_SNAPBACK}>[/url]</div>

LOL got challenged last night. I was out driving around, actually trying to find a place to open up the MS6 and burn off some stress. Unfortunately, my house is surrounded on three sides by friggin construction zones. So I was headed up the Powers bridge over Woodmen, which is a construction zone, cruise-controlled RIGHT at the PSL. Pair of headlights come screaming up on me from behind and get on my bumper.

Great. I'm thinking a cop, so I just chill.

Driver tosses his car into the left lane and moves up beside me. It's a little red Sunfire, trying to show off. Oh, the temptation there was to drop it down a gear and toast him. But then I heard "K-band!" from Bitchin' Betty (that's my radar detector's name...). Two bleeps, then nothing. So I waited. Another two bleeps, then nothing. I waited again. That's typical of El Paso County guys shooting instant-on K-band.

Sunfire gets pissed and takes off over the bridge.

YAY! Rabbit!!

I let him gain about 300 feet, then matched speed. RD kept alerting as we crested, but the SUnfire turned off onto Woodmen west, while I went Woodmen East. My guess is that our friendly neighborhood SMOKEY was sitting at the bottom of the bridge. MAN I was hoping to watch that little red car get LIT UP! That would have made my night. But no joy. [/b]

Would it be unreasonable to guess that the automatic doors from the home depot were setting off your k-band from that far off? I've honestly only ever seen patrol cars sitting on the southbound side, on the south side of the bridge, just before dublin..

[Stealth01]

<div class='quotetop'>QUOTE (Red95FMII @ Apr 29 2008, 12:08 PM) [url=index.php?act=findpost&pid=43487]<{POST_SNAPBACK}>[/url]</div>

Would it be unreasonable to guess that the automatic doors from the home depot were setting off your k-band from that far off? I've honestly only ever seen patrol cars sitting on the southbound side, on the south side of the bridge, just before dublin..[/b]

The Pro-78's horn is fairly directional, so something that off-axis and far away wouldn;t likely alert. I've crossed that area a number of times and gotten no falses until I hit Research, where the security system on a mortgage bank gives me an X-band false.

I've seen cops sitting RIGHT at that off-ramp, too, clocking people coming over the hill and going down the off-ramp (5mph!!). Could also have been a Your-Speed trailer, but unlikely given the on-off-on-off nature of the signal.

[RX-7 Chris]

On the way home from work yesterday on I-25 I was challenged by a ...... drum roll










Nissan Versa, What the hell.
You all get challenged by cars that are worth something and I end up with a 122hp 1.8L pregnant roller skate. Come on bring on the neons. This lady thought she was in a super Versa. I didn't even have to really push on the gas.

[Stealth01]

<div class='quotetop'>QUOTE (RX-7 Chris @ May 1 2008, 08:58 AM) [url=index.php?act=findpost&pid=43827]<{POST_SNAPBACK}>[/url]</div>

... 122hp 1.8L pregnant roller skate...[/b]

[RedRoadster]

I've heard pregnant roller skate used to describe Festivas and Metros but never towards a Versa. Was she seriously revving at you?

[RX-7 Chris]

To me the versa looks like an updated metro. She was coming up next to me and speeding up then slowing down then speeding up. I don't think her intension was to race but she thought she could get around me. I thought it was so funny.

[icon]

got challenged today by a mazdaspeed protage today. went from a dead start at a stop light. raced up to 50 i had about 2 car lengths. killed it off the line. then from a rolling start at about 30. pretty much dead even. damn turbo

[milehighspeed3]

I had a little fun with a black GTI on the on ramp to I-15. He slides in front of me as we are waiting to get to the on ramp, and then as luck would have it when we got to the on ramp it was just us. The look on his passengers face was priceless as I was passing by him. He eventually caught up and wanted another shot as I could tell his friend was giving him the business. Traffic didn't allow for another run. I'm pretty sure he wasn't up on Mazda's latest hatch, I think he'll be on the look out now.