Dyno results

[MiRamDriver]

392.6ps is roughly 387hp.

That being said, I'd be shocked to see a hemi with vararam, header/exhaust, tb and 93 tune pull off 387hp when they come from the factory with 390 at the CRANK, which should equate to ~312rwhp assuming only a 20% drivetrain loss. No way those mods managed 75hp.

I think everyone needs to compare apples to apples here. He has the 8 speed, which is supposedly more effective than previous. Perhaps there is little drivetrain loss? I think there were a couple other guys that dyno'd 8 speeds with the best being a 16.5% loss (from what I remember). Just FYI.

 

[jcat]

I think everyone needs to compare apples to apples here. He has the 8 speed, which is supposedly more effective than previous. Perhaps there is little drivetrain loss? I think there were a couple other guys that dyno'd 8 speeds with the best being a 16.5% loss (from what I remember). Just FYI.

16.5% loss would put 390 at the crank at roughly 326rwhp.

We're still talking 52rwhp gain from intake, tb, headers, exhaust, and a tune. That'd be ~62 at the crank which I guess seems more reasonable, but 16.5% loss still seems like a stretch.

 

[DavidRam]

392.6ps is roughly 387hp.

That being said, I'd be shocked to see a hemi with vararam, header/exhaust, tb and 93 tune pull off 387hp when they come from the factory with 390 at the CRANK, which should equate to ~312rwhp assuming only a 20% drivetrain loss. No way those mods managed 75hp.

And that would be +75 rwhp.

 

[Lhemi]

Will this thing never die....

 

[jcat]

And that would +75 rwhp.

Yep, or 90 at the crank, if we're assuming a safe 20% drivetrain loss.

I'd be impressed if the 8 speed really only has 16.5% loss in these trucks, as most FWD or RWD cars have about 15%, and I would imagine our trucks have a lot more pulling on them, unless OP's truck is a 2wd.

In a 4WD 8spd truck, you have the torque converter, trans, driveshaft, transfer case, rear end and big heavy tires and wheels dragging in the driveline. I don't see how it could be that low.

 

[Lhemi]

Yep, or 90 at the crank, if we're assuming a safe 20% drivetrain loss.

I'd be impressed if the 8 speed really only has 16.5% loss in these trucks, as most FWD or RWD cars have about 15%, and I would imagine our trucks have a lot more pulling on them, unless OP's truck is a 2wd.

In a 4WD 8spd truck, you have the torque converter, trans, driveshaft, transfer case, rear end and big heavy tires and wheels dragging in the driveline. I don't see how it could be that low.

If you read the very first page it tell's you what the OP's truck is...

 

[jcat]

If you read the very first page it tell's you what the OP's truck is...

My bad, I missed that you were the OP and that it was Randon User who was posting that euro-chart.

 

[DavidRam]

If you read the very first page it tell's you what the OP's truck is...

Hey bro, the thread was revived by another members dyno posted. Check out the bottom of page 7 and let us know what you think.

 

[badvik]

Hey, guys, I do have only mods as I written before. And here you can check my license plate with the number on the dynoresult if you think I had something to make fake. The 380-393 were reached in different rides, I mean it is not the best one result whether the others are around 300.... The only thing I should do is to make a dyno before getting all mods.
If somebody has same mods and can make dyno let's compare the results, otherwise it's seems like useless discussion of how it could or could not be in a theory but the result is as it is.
The measures to 60 as I've already written I made only to see the differences during installing the mods. I mean I dropped from stock 7.6 to 6.2. I almost sure it could be and it is quicker but I don't want to load the gearbox. And actually the best way to see real changes would having tests to 100mph or eg 1/4 but I haven't done them unfortunately.

 

[badvik]

Here is the video of one of the rides at the beginning, it showed 350
MOV 0006: MOV 0006 - YouTube

Here we did it on 5th gear but it was unable to catch the shifting moment. Then we made some rides on 4th trying to stay on a gear and get some results with 383, 387 and 2*393

P.s. the gas is 98 european octane. I think it is a bit higher, then 93 US but still it could also play its small role.

 

[MiRamDriver]

16.5% loss would put 390 at the crank at roughly 326rwhp.

We're still talking 52rwhp gain from intake, tb, headers, exhaust, and a tune. That'd be ~62 at the crank which I guess seems more reasonable, but 16.5% loss still seems like a stretch.

52 Rwhp doesn't sound like much of a stretch to me at all especially since he has LT's.

 

[Lhemi]

In America that's 328 RWHP I got the exact same mods now as you...

 

[MiRamDriver]

In America that's 328 RWHP I got the exact same mods now as you...

I wonder if the different exhaust and 8 speed account for the difference?

 

[Lhemi]

There are about 2 million differences , from Dynos to metal to truck motors.

 

[Lhemi]

I would still like to see the conversion formula

 

[badvik]

I would still like to see the conversion formula

1hp = 1.014 ps. 393=387 Hp.
I uploaded the vid on page 9.
I can tell that sw tubes and exhaust made most noticeable changes of all. Not in compare but generally changed the acceleration. This is the case when one mod from four ones brings 10hp but all together they are bringing completely different result. IMO.

 

[Lhemi]

1hp = 1.014 ps. 393=387 Hp.
I uploaded the vid on page 9.
I can tell that sw tubes and exhaust made most noticeable changes of all. Not in compare but generally changed the acceleration. This is the case when one mod from four ones brings 10hp but all together they are bringing completely different result. IMO.

I would like to see your 1/4 mile and 0-60 / 0-100 mph if you would post those please.

 

[badvik]

that could be a problem. We don't have such professional services even in Moscow, because that kind of racing is not as popular as in US. The only possibility I see is to borrow a Racelogic or GTech box from somebody. I check with our SRT Club may be somebody could help me.
But, honestly, we have to understand I've a crew cab with all possible option stuff and 3.55 RA which could be hardly compared to R/T.

 

[TylerB]

A truck with 3.55s will dyno higher than it would with 4.10s, but it would run faster down the track or 0-60 with 4.10s. It's especially noticeable with a heavier crewcab with 3.55s than compared to a two door with 4.10s.

 

[lonewolf2873]

A truck with 3.55s will dyno higher than it would with 4.10s, but it would run faster down the track or 0-60 with 4.10s. It's especially noticeable with a heavier crewcab with 3.55s than compared to a two door with 4.10s.

Please explain why 3.55 would dyno higher than 4.10.