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hotrod
Joined: 19 Apr 2005
Posts: 872
Location: Colorado
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 Posted: Tue Apr 28, 2009 7:43 pm Post subject: |
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The old Chevy 409's would do that too. They had too much gear in the rear end, and with the torque multiplication of the transmission you could light the tires at 60 mph my just nailing it. You could also spin the car pulling out of a drive way into traffic if you were not careful by doing a NASCAR style burnout instead of accelerating up to traffic speed.
Larry |
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Alcohol
Joined: 17 Apr 2007
Posts: 634
Location: Central Wisconsin
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| Posted: Wed Apr 29, 2009 9:28 am Post subject: |
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| hotrod wrote: | The old Chevy 409's would do that too. They had too much gear in the rear end, and with the torque multiplication of the transmission you could light the tires at 60 mph my just nailing it. You could also spin the car pulling out of a drive way into traffic if you were not careful by doing a NASCAR style burnout instead of accelerating up to traffic speed.
Larry |
That sounds like experience talkin' 
I believe there was a song about the 409's right?
Did they ever put a 409 in a light rear ended car such as a Nova? |
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hotrod
Joined: 19 Apr 2005
Posts: 872
Location: Colorado
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| Posted: Thu Apr 30, 2009 1:24 pm Post subject: |
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| Quote: | | Did they ever put a 409 in a light rear ended car such as a Nova? |
Not intentionally 
At the time the 409 came out the cars were all boats. The Impala weighed in close to 4000#.
Some went into the 1955's as engine swaps but they quickly got replaced by the later generation engines.
The 409 tended to eat valve trains and although it had an impressive public relations presence it was getting stomped by the Chrysler 413. When they came out with the 396 in the late 60's it pretty well retired the 409 for street use, as both the 327, 350 and 396 were lighter and could make as much power depending on how hard you "leaned on them".
The closest they came to it were the Yenko Camero's, and Nova's.
http://www.chevyhiperformance.com/featuredvehicles/148_0403_1969_yenko_427_nova/index.html
A Chevy Nova with a built 350 could be brutal and reliable. The same car with a 327 could be just as bad but brittle and tended to break, the 396 was just as strong as the built 350 but heavier and killed the handling.
A local sheriff's office here in Colorado had a drug undercover car built around a 350 Nova, and it was not a car to be messed with.
By the time all that happened the big blocks were off to the races with the 426 Chryslers (wedge and hemi), 427/ 454 Chevies, the 427/428 Fords, the big Pontiacs like the 455, 442 Olds, and the older engines quickly dropped out of favor as all the new generation big blocks were thin wall castings and were much lighter blocks with better cooling, generally stronger rods etc.
Larry |
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Alcohol
Joined: 17 Apr 2007
Posts: 634
Location: Central Wisconsin
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| Posted: Thu Apr 30, 2009 2:27 pm Post subject: |
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| Thanks Larry- that Yenko / Nova would be one fine machine to own. |
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Thumpin455
Joined: 04 Oct 2008
Posts: 227
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| Posted: Thu Apr 30, 2009 7:57 pm Post subject: |
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455s? now who would own such a creature, arent they inherently wasteful and slow? hehhehehehehhehee.....
Oh yeah I finally got the CEL to come on, it took a slight uphill part throttle jack rabbit type start. Havent checked it yet, but its what I have been waiting for. If the weather is nice tomorrow I will do a bit of tuning and see how it works out, and of course, check the duty cycle so I dont fry some injectors.
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1970 Pontiac GeTOh 455 with a Qjet.
1998 Pontiac Formula LS1 on yeast pee. |
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Alcohol
Joined: 17 Apr 2007
Posts: 634
Location: Central Wisconsin
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| Posted: Thu Apr 30, 2009 9:02 pm Post subject: |
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What % alcohol did your CEL go on?
Let us know what duty cycle and LTFT's were Thumpin. I am curious if your CEL was a preset parameter showing "lean code bank 1" based merely on a LTFT of 25+ instead of a true lean situation from lack of injector or fuel pump capacity and the o2 sensor reading was lean. It seems my Saab and other GM's have such a parameter for high trims. |
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Thumpin455
Joined: 04 Oct 2008
Posts: 227
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| Posted: Thu Apr 30, 2009 9:24 pm Post subject: |
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pretty much whatever % the E85 is up here right now. I will look into it, might be tomorrow, might be later. A bunch of stuff goin on right now and I have other cars to drive. 
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1970 Pontiac GeTOh 455 with a Qjet.
1998 Pontiac Formula LS1 on yeast pee. |
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Thumpin455
Joined: 04 Oct 2008
Posts: 227
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| Posted: Thu May 07, 2009 9:26 am Post subject: |
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Finally found the time to check the codes, the other half's Blazer has issues so she took the 98 to work today. It got a system too lean on both banks under a higher part throttle acceleration. So I will play around with the tune tomorrow and see what duty cycle the injectors are running. Still need a battery for the old laptop, all the newer laptops I have dont have a serial port, go figure.
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1970 Pontiac GeTOh 455 with a Qjet.
1998 Pontiac Formula LS1 on yeast pee. |
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Thumpin455
Joined: 04 Oct 2008
Posts: 227
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| Posted: Mon May 11, 2009 11:59 am Post subject: |
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Ok so I needed to drive 6 hours on Saturday, so I took the 98. It was at half tank of E85 and I just topped it off with premium. With the CEL on it was sucking down the fuel pretty fast on the E85, it was getting about 24 mpg by the trip odometer. So I cleared the code when I filled up.
When it was running good prior to last summer, it would go 100 miles on the first quarter tank, and 330 miles on the whole tank, and that would be right around 29 mpg average. After running the E85 through it, and then having half tank of it left when I filled up, it is on its way to over 330 miles to the tank. So it actually is picking up mileage and power. Maybe the ethanol cleaned the injectors and fuel system or something, but a roughly 40% mix isnt supposed to improve mileage by that much, with no tuning, according to the anti alky people.
Its interesting to say the least. If it does that good on a lower mix, then I figure I will continue to use that much and see how it does over a few tanks.
The really curious part is it used to get better mileage at higher speeds on the interstate, this was all two lane and cruising through small towns with a 55 limit, doing around 60-62 and passing every so often. It makes me wonder how it would do at 80mph going across Nebraska.
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1970 Pontiac GeTOh 455 with a Qjet.
1998 Pontiac Formula LS1 on yeast pee. |
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Gran Touring Labs
Joined: 18 Nov 2007
Posts: 129
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| Posted: Mon May 11, 2009 12:58 pm Post subject: |
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Welcome to the E85 Mileage Club . It's amazing how much fuel you save when you don't have to use the throttle as much .
BTW, did Alzheimer's hit you fogeys already? I just learned to pee by myself and still know the Beach Boys' 409 :p. I love that tune!
http://www.youtube.com/watch?v=xKKP_cZuk54
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Can't leave well enough alone? Neither can we.
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Ls2camaro
Joined: 25 Dec 2009
Posts: 9
Location: Near Great Smoky Ntl.Park
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| Posted: Sat Apr 24, 2010 5:24 pm Post subject: |
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| Thumpin455 wrote: | | Now I wish it had 14:1 instead of 11:1 with aluminum heads. |
WOW
Hi Thumpin
Which one I should get the airflow/fuel or exhaust temperature gauge for my 2001 Camaro Ls1 stock . I have been running my 2001 Camaro Ls1 on 50% E85 and 50% Gasoline (87% or 91%) with no troubles. |
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murphinator
Joined: 08 Jan 2010
Posts: 93
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| Posted: Sat Apr 24, 2010 6:39 pm Post subject: |
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I know this is an older thread - cool that you noticed differences in power with no tuning changes
my concern for doing that is when you go wot it goes into open loop/power enrichment and is still calculating the extra fuel for enrichment based on 14.7 stoich with no feedback from the 02 sensors to let you know its lean
this on top of the headers you mentioned which would have leaned it out a bit allready
it sounds like your hp tuners is the older serial style so you dont have the inputs on the side of the interface to drop wideband data into your scan logs but you can wire the wideband through the ac or egr and still get the data in your scan logs real time just the frame count is lower than the pro version ( less data)
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PB's 1/4 mi 12.209, 117.75 trap ,1/8 mi 7.76 ,93.99 trap , 1.949 short time 4.53 0-60
I tune with HP Tuners software |
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Thumpin455
Joined: 04 Oct 2008
Posts: 227
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| Posted: Sun Apr 25, 2010 8:40 am Post subject: |
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I just havent messed with tuning it since my laptop needs a new battery and I cant drive it with the laptop plugged in. The easy way is larger injectors and some tuning, and/or increase fuel pressure to get more flow from the injectors.
Lately I have been running it with 40%-50% ethanol splash blending it. On 93 octane it usually gets around 26mpg mixed highway and city on my trips to Iron Mountain. On my latest trip last week it got 25 mpg with a 50% mix on the same loop. No CEL, no problems, just a smoothness and power it doesnt have on 93.
I also have a 98 Gran Prix with a 3.8L in it, I have been toying with the idea of converting that one and playing around with some things since the engine is much easier to get to than the Formula. We'll see how the summer plays out and how much fuel I can make here at home to try some new stuff. Lots of things in the works, just need to figure out what to do first.
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1970 Pontiac GeTOh 455 with a Qjet.
1998 Pontiac Formula LS1 on yeast pee. |
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