C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

New dyno #'s with 4l80e

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Old May 6, 2003 | 12:24 AM
  #1  
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Default New dyno #'s with 4l80e

finally got trans in and cant believe the power we gained from the 4l80e
old dyno #'S were like 480 with 700r4 in it
new dyno #'s with 4l80e were 593hp/730 spike tq
http://www.twinturbovette.net/Updates.html

does anybody think the 700 was slipping hehehehe

the car went a 11.0 at 125 with that slipping trans cant wait to see what will happens with the 4l80e in it


[Modified by meach13, 11:25 PM 5/5/2003]
[Modified by meach13, 11:27 PM 5/5/2003]


[Modified by meach13, 11:28 PM 5/5/2003]
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Old May 6, 2003 | 12:47 AM
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Default Re: New dyno #'s with 4l80e (meach13)

:eek: damn
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Old May 6, 2003 | 02:06 AM
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Default Re: New dyno #'s with 4l80e (vader86)

:eek: :cheers:
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Old May 6, 2003 | 02:25 AM
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Default Re: New dyno #'s with 4l80e (quiksilver458)

:smash: :smash: :thumbs: Let us know how is does at the track.
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Old May 6, 2003 | 02:28 AM
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Default Re: New dyno #'s with 4l80e (meach13)

Excellent! I'd be interested in the details for the 4l80e swap as well. That had to be quite an undertaking.
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Old May 6, 2003 | 03:04 AM
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Default Re: New dyno #'s with 4l80e (Dan Parker '96)

Excellent! I'd be interested in the details for the 4l80e swap as well. That had to be quite an undertaking.
me too :yesnod:
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Old May 6, 2003 | 03:26 AM
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Default Re: New dyno #'s with 4l80e (billreid1@***.net)

:eek:
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Old May 6, 2003 | 05:02 AM
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Default Re: New dyno #'s with 4l80e (meach13)

you picked up 113 rwhp??? :eek: How hard is the swap????? Me WANT ONE TOO!!!! :yesnod:
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Old May 6, 2003 | 08:19 AM
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Default Re: New dyno #'s with 4l80e (ScottsLT1)

Awesome numbers! One question though.....why does the power only last a very short period of time? I see you have a 2800 stall converter, if you put a bigger converter in there you would be in a lot better shape for racing, since your peak torque is way up there......must be the long tube runners causing the short power band......

I would put a SR on that critter and make a more broad power band that would really crank.

Awesome work though.....and great numbers. :cheers: :cheers:
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Old May 6, 2003 | 09:21 AM
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Default Re: New dyno #'s with 4l80e (meach13)

My god you're making that much power and you're not even spinning 5200 rpms. That is just plain awesome! I'm left to wonder how much it would make if you had something like a mini ram on there, a nice short runner design that's made for top end power. I'd bet you'd see 700 hp.

Unreal, and no I will NOT race you. :cheers:
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Old May 6, 2003 | 10:13 AM
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Default Re: New dyno #'s with 4l80e (meach13)

With that HP I'd expect you should run between 133 and 135.

Boost levels were the same between the 2 different pulls ?

Couple of wierd things that I noticed. The intersection of the HP and torque curves are low. Was the boost staying constant ? Also did you roll into the throttle going to WOT or did you mash it.
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Old May 6, 2003 | 10:34 AM
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Default Re: New dyno #'s with 4l80e (SloRvette)

yes the boost level stay around 18-19psi
we had the converter locked in 3rd gear and hit it at a low rpm, so instead of the converter coming up to 28-3000 it lugged a little

if the car will go to the track run some 10's and drive home that is all we ask

because the power this car makes is how ex-gold87 drives it gets a 3/4 tank of 93 and then a 5 gallon can of 100 we show up to the track put the drag radials tire pressure on 12 and run, without changing anything


[Modified by meach13, 9:41 AM 5/6/2003]


[Modified by meach13, 9:55 AM 5/6/2003]
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Old May 6, 2003 | 11:43 AM
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Default Re: New dyno #'s with 4l80e (SloRvette)


The intersection of the HP and torque curves are low.
Mathematically horsepower and torque will ALWAYS cross at 5250. Horsepower and torque are related with an equation, and as such they are ALWAYS the same at 5250 RPM's. No questions asked, it is a fact. So then why do they not cross at the same point on his graph? Notice the scale, horsepower and torque are plotted on the same graph but a different scale, thus they cross at strange points. If you were to graph his horsepower and torque on the same scale it wouldn't even cross because he didn't spin 5250 RPM's. :cheers:
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Old May 6, 2003 | 12:25 PM
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Default Re: New dyno #'s with 4l80e (SloRvette)

The intersection of the HP and torque curves are low.
Different scales on the left and right.
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Old May 6, 2003 | 12:34 PM
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Default Re: New dyno #'s with 4l80e (scorp508)

:confused:
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Old May 6, 2003 | 01:46 PM
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Default Re: New dyno #'s with 4l80e (meach13)

:yesnod: Scale, ok, that's what I missed.
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Old May 6, 2003 | 02:35 PM
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Default Re: New dyno #'s with 4l80e (SloRvette)

Damn... Thats nasty....!!!

I love Ex-Golds87 car...... It is so cool...

That thing is a beast. Everything is so clean to. I want a car like that someday

Congrats :cheers: Cant wait to here some number at the track
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Old May 6, 2003 | 10:25 PM
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Default Re: New dyno #'s with 4l80e (StealDads67)

Thanks for all the kind words guys. I have some pictures of the install and will try to get Meach13 to put them on the web site soon.

The install is really not that bad, just have to make an adapter for the tail shaft that bolts on the torque arm. The driveshaft has to be about 2 inchs shorter and the torque arm has to be cut.

We cant wait to go to the track..... :smash: :smash: :smash:
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