https://www.thrillist.com/travel/nat...-worst-summers

 

Tusky I lived in Phoenix for ten years and moved back east. I will trust what I actually experienced over an internet search.

True story. I was in Mississippi at a rest stop in august while driving across country. Everyone was bitching about the heat. So I said yeah I just cane from Phoenix, call me in another 15 degrees. Their response - well it is different out there because it is a dry heat. My response - ok but the guy from desert is not the one bitching about the heat.

You do not know the sheet brutality of the sun when it is unfiltered for months on end. And the internet cannot make you feel it.

Another true story. Guys from our Texas steel mill went out to AZ to assist with a project. Same bullshit dry heat argument. That first week three guys passed out. And these are guys used to working in a steel mill near Houston. Not exactly light weights.

 

My first full time job out of high school which was 2008 was pouring concrete. I never will forget that year. A co worker at the time passed out and barely could breathe on the way to the emergency room. That day was so hot i seen heat waves in the air 😩

I haven't worked outside since then.

 

Darth is right. Here in phoenix it is brutal on our cars. No humidity and dry 115 degree heat and our cars just dont want to run. They get hot quick and the DA is absolute garbage. There is no happy medium either, once is cools down a dew forms quickly on the roads and track surfaces causing it to be slippery. We get like 1 month of solid hot rod weather. November.

 

So no one never answered the question. How much mph will a gain losing 350 to 400 pounds ?

 

If 383ci motors was milk and cookies you would see more people building them but instead you see guys going straight a 6.0 or perhaps the popular 408ci combo...

 

Its VERY HUMID here period. Ask another guy thats on here if you don't believe me.

 

What you are ignoring is elevation. Two of the major factors in air density is elevation and temperature. Humidity has less effect on air density than either elevation or temp. So with that in mind Sonoma Cal. is 2400 ft above sea level while Miss. is near sea level. My local drag strip is about 750 ft above sea level.

So in Sonoma at 90 degrees with 25% humidity the DA might be near 5000
In Miss for example at 105 degrees with 99% humidity the DA might be 3750
In Iowa on that same day it might be 85 degrees with 75% humidity the DA might be 2800.

So even with it being 15 degrees hotter and 99% humidity you are still seeing better air than California and only slightly behind Iowa. So in July, Aug, and September Iowa gets slightly better air than you. What changes though is early spring/late fall when our tracks are closed down south and east coast tracks are still open with cool temps and get the best air anyone will ever run in which is some times negative DA. Here in Iowa a dream day while the tracks are still open might be 1500 DA.

So with all of that said the basic point is unless you are in the mountains I don't really want to hear the whining about air quality.

Now back on topic when I was all motor (before I discovered the good life of boost LOL) I ran 119 mph with a 408 back in 2006 with about a 3700 lb race weight GTO. That was 11.4 to 1 on 91 octane with 225 cc AFR heads, fast 90, NW 90 throttle body. Car dynoed 480 rwhp unlocked 3600 converter. So his numbers sound about right and proves that as far as peak power its more about the cam and top end then it really is cubic inches. A 346 could probably make the same 480 rwhp with an aggressive cam and top end so trap speed may be similar, but cruising around town having fun that low end torque really shines on the bigger inch motors. The other thing is the bigger inch motors can make that power and be more streetable than the super aggressive cammed 346.

 

Humidity doesn't have as big a factor on air density as you think it does.

 

At 500 ish rwhp maybe 4 mph it's a guess though. The weight will effect ET more than MPH I would guess.

 

Your biggest issue isn't the temp in Phoenix it's the elevation. You are way higher above see level than Miss. for example. Elevation and temp are way bigger factors in air density than humidity. The humidity feels terrible as I work in a factory and humid days suck much more, but air density doesn't change as much with humidity as it feels like it does.

 

🤣 yea I bet it don't. You have no idea of the feeling of sweating and not moving. I literally have sweated like hell getting out the dually just getting lumber out the back of the bed and I'm no fat guy at all.

I'm go say weight effects both E.T and the mph together. Why is that because they go hand in hand with each other.

 

Umm...I work in a factory where it is normally 120 degrees and the humidity in Iowa during the summer isn't that much lower than it is where you are. My other hobby relies highly upon air density. Humidity feels crappy, but it doesn't have that much effect upon air density compared to ELEVATION ABOVE SEA LEVEL. Ask anyone in denver about their cool air times for an extreme example LOL...low temp and low humidity still over 6000 DA LMAO.

Weight effects ET because it's harder to get the car going. You can add more power, but getting the additional weight going just causes more traction problems. So in this case weight effects ET more than trap speed. Power levels matter though on how much all of these things impact trap speed and ET. The big factor is your popular tracks down there actually get prepped like fly paper you will never run on a track prepped like that here in Iowa.

Oh I miss the all motor days when I could just hold it to the floor. Now in the boost world you almost always have more power than you can use so it's all about managing the power to what the track will hold. Having to pedal beyond 330' has a bigger impact on trap speed than anything else so a fly paper track would help more than good air at that point.

It's all excuses though really you ran what you ran...

 

Here is a drag racing Density altitude calculator. Play with this with various elevations, temps, pressure, and humidity. You will quickly find out humidity has the smallest impact on air density of all of those other factors. No matter how cool and dry it gets in Denver they will never see the air quality you will see on the hottest most humid day.

Density altitude calculator

 

Hey Tuskyz what part of Mississippi are you from?

 

yes, I would agree it’s not a popular build but they can be made to make good power. If I could get my YouTube vids on here I would post them. I did post some of the good dyno pulls ( Super Flow 4 Wheel) some years ago but they are not in my archive any longer, now I can’t get vids to post.
Ill build another 383 sometime as I have a rotating Assy. for it, I’ll use a gen4 LH6 block just to avoid using a 5.7 again.

 

I'm from New Albany. Right outside of Tupelo.

 

Gets humid in phoenix too btw. Monsoons roll in and humidity can get to 70+% while still being 115 outside and 5500+ DA.

Anyways a well built 383 will beat out a 346. It is simple mathematics. More air in and out and mechanical advantage of extra leverage providing more torque across the entire rpm range. Cant get around that fact.

 

Ooo I want to play too!
https://www.currentresults.com/Weath...est-states.php
#1....FL.

 

Not everyone is building strictly for the 1/4 sometimes its about building for a fun to drive daily.

Out of the various LS set ups I've had or have - the most fun and my favorite to daily drive, most painless in traffic is a mild mannered 383 LS1 stroker with ported LS6 heads, 90mm LS6 intake 11.3 to 1 compression and a small 229/229 cam. Basically the combo of parts many frequently ridicule.

Given 64, has a 534whp 383 LS1 that's pretty sweet IMO - proves with the right parts the LS1 stroker can do very well.

With that said, a fat wallet 383 with the right aftermarket heads, donkey cam, 12 to 1 compression, hot coils and ported MSD intake etc could probably hit 550+ whp NA which is pretty decent.