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the first person to get an Edelbrock SC on a 6.2!

bass mechanic

By bass mechanic
in Engines & Drivetrain

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Prokopchuk_9 Senior Enthusiast

Prokopchuk_9

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No. There's lots of info there. Maybe when you get the SC on and have results/review to report you should start a new thread for that to be discussed.

We'll still remember what numbers it's gonna make lol

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bass mechanic Enthusiast

bass mechanic

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Well if anyone wants to know what a stock 6.2 does on the dyno here you go!
The blue lines are 3rd gear and the red is 4th gear

 

personally I am quite impressed, these numbers aren't far off from what LPE got with their SC 5.3

I can only imagine what the final result will be. if they are able to do 100+ hp and tq that should put me over 500 to the wheels!

u6uvyqun.jpg



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Prokopchuk_9 Senior Enthusiast

Prokopchuk_9

Posted
Posted

Well if anyone wants to know what a stock 6.2 does on the dyno here you go!

The blue lines are 3rd gear and the red is 4th gear

 

personally I am quite impressed, these numbers aren't far off from what LPE got with their SC 5.3

I can only imagine what the final result will be. if they are able to do 100+ hp and tq that should put me over 500 to the wheels!

u6uvyqun.jpg

 

 

 

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If that's what it's really puttin down to the wheel, that's impressive. Too bad you can't go do 10 runs down a track as well! Then compare after!

bass mechanic Enthusiast

bass mechanic

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I was told the truck is on the lift as we speak getting the pacemaker installed..

I can confirm that the battery is disconnected as I can no longer get updates on my OnStar application. but I know they put 26 miles on the truck on the dyno since I dropped it off and used 10% of the fuel in the tank.

lol

Prokopchuk_9 Senior Enthusiast

Prokopchuk_9

Posted
Posted

I've seen multiple graphs from new 6.2's that put 330-340 down. Is yours stock but tuned?

 

400 at the wheel in a truck that makes just over that at the flywheel? Wonder what the correction factors are set at on that dyno?

 

Either way, interested in a before/after number anyways. And a 1/4 mile time

bass mechanic Enthusiast

bass mechanic

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I've seen multiple graphs from new 6.2's that put 330-340 down. Is yours stock but tuned?

 

400 at the wheel in a truck that makes just over that at the flywheel? Wonder what the correction factors are set at on that dyno?

 

Either way, interested in a before/after number anyways. And a 1/4 mile time

 

dude, im as clueless as you.. all I know is this is what they sent me. but this much I do know and you can take it with a grain of salt because its pure speculation on my part.

I do know for a fact confirmed by 2 different sources the only difference between the 6.2 in the truck and the stingray is the intake manifold and the tune. I find it interesting the stingray makes I think 450 something hp and tq the truck 420 and 460.

I find it hard to believe the stock flywheel HP is down that much on the truck but also consider that the trucks redline is 6,000 and HP is calculated as rpm times TQ divided by 5252.

this means any engine that makes more peak torque (or can maintain a sufficient amount of tq) above 5252 will have more hp than tq any engine that makes peak tq below 5252 will have more tq than hp.

if you look at the graph you can see this engine is making more TQ below 5252 as such it is obvious why the TQ is greater than HP it explains why the stock specs are 460 tq and to have 400 TQ at the wheel is about a 15% drivetrain loss and exactly what I would expect.

 

personally, I think manufacturers like to publish HP numbers because often times the HP is more than the TQ (it looks better on paper to a consumer) but when your talking trucks we really need to be looking at the TQ numbers because that really tells the whole story about how much pulling power it has.

after all HP is a calculated number, and it is representative of the work being done and is a good benchmark to calculate 1/4 mile times. but in reality it is the TQ and how long the TQ curve stays constant that really indicates the twisting force that you feel at the pavement.

 

having said all of that, I believe the transmission and the lack of a perfect 1:1 gear ratio will skew the results. clearly the 3rd gear run and the 4th gear run are different on this graph. it seems to be the taller gearing shifts everything up in the rpm band and also the curve itself is different. so I think its fair to say without getting into a technical mathematical answer as to why this is I think the gear ratio changes the actual output and also skews the peaks to different RPM's

also since 5252 is only 750 rpm away from redline, HP really becomes irrelevant in a truck. (Which is why you almost never see it advertised on a diesel)

 

so with that said unlike most dyno graphs your used to seeing I will focus more on the TQ curve and improvements found there and I am also willing to bet the transmission will shift before 6k leaving the HP numbers pretty much useless.

 

besides GM even rates the peak TQ at 4100 rpm and the peak HP at 5600rpm looking at the graph and keeping in mind the gear ratio changes the peaks they are both pretty consistent peaking at those rpm's 4600 for the tq and 5900 for the hp

 

and again I am by no means an expert but I think the TQ curve and how long it stays consistent tells a much better story as to how the power comes on, stays strong throughout the usable rpm range.

 

LPE's 5.3 SC made 416hp and 444 tq with 6 lbs a 105 improvement over stock. another example of a truck that makes more TQ than HP

 

also I don't know about LPE but edelbrock told me today on the phone that their published numbers are lower than they actually got on the dyno. they do that because if someone buys their kit they don't need to hear someone complain about how they didn't get the same results as advertised. so with that said im going to ignore whatever they publish and instead use the actual dyno numbers used in my install and tune after this is all said and done.

 

if anyone has a better answer to share I am all ears. I agree the HP looks high but this is the best answer I can come up with.

 

 

looking at the graph I can see why the truck tows so well like all trucks the meat of the tq is right in the butter zone between 4000-5500 (adjusting for the skew of 3rd gear) that's right where your engine will be running going up a hill in a lower gear.

bass mechanic Enthusiast

bass mechanic

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Also a quick peek at what I have waiting for my truck when it gets home, BLACK CHROME wheels. I've also decided to change out all the chrome door handles, mirror caps and side moldings for black chrome as well. I think on a black all terrain truck with a sc will make for a very cool visual and performance package

agymudyz.jpg

 

 

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bass mechanic Enthusiast

bass mechanic

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for those following, i got an update today, the intake manifold is off, and the supercharger is being assembled. i don't know if that means the actual supercharger is being assembled or if that means its still being fitted to the truck, i suspect the latter because it only takes about 10 minutes to assemble one.

they say the wire harness is installed. now sure what harness that might be except the electric pump that pumps the water through the intercooler / heat exchanger.

the problem is this week the head tuner technician and the lead sales guy I've been talking to are both on vacation.

one of them returns tuesday that will be able to give me a better update.

 

also they have a few other projects they are working on and short of staff this week. so ill keep waiting and trying to be patient! anyone who knows me would tell you patience is definitely not one of my strong points..

bass mechanic Enthusiast

bass mechanic

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I just got this pic today! I think it will be running tomorrowyvyru9ys.jpg

 

 

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iCryWheniGoPoop Enthusiast

iCryWheniGoPoop

Posted
Posted

Well if anyone wants to know what a stock 6.2 does on the dyno here you go!

The blue lines are 3rd gear and the red is 4th gear

 

personally I am quite impressed, these numbers aren't far off from what LPE got with their SC 5.3

I can only imagine what the final result will be. if they are able to do 100+ hp and tq that should put me over 500 to the wheels!

u6uvyqun.jpg

 

 

 

Sent from my iPhone using Tapatalk

Are u sure the blue is 3rd and red 4th? 4th is closer to a 1-1 ratio and would show as much, if not more power than a 3rd gear pull. Really doesn't matter, impressive numbers... Just odd.

thetruck454 Enthusiast

thetruck454

Posted
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I just got this pic today! I think it will be running tomorrowyvyru9ys.jpg

 

 

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I see they added vents on the top cover. I know there was heat issues with the eforce. I bet this alleviates that problem.

Sooperdave Enthusiast

Sooperdave

Posted
Posted

Are u sure the blue is 3rd and red 4th? 4th is closer to a 1-1 ratio and would show as much, if not more power than a 3rd gear pull. Really doesn't matter, impressive numbers... Just odd.

I wondered the same thing.. But yeah still strong numbers!

iCryWheniGoPoop Enthusiast

iCryWheniGoPoop

Posted
Posted

I wondered the same thing.. But yeah still strong numbers!

 

I knew somebody else with Dyno experience would catch it.... not only is it lower, it's a different curve.

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