RS46 DynoJet results

[JMD0977]

Here is a Dyno of my RS46. Dyno was performed about a week ago using SAE corrections on a DynoJet, 91 oct used (420WHP). The highest reading (431WHP) was done using a mix of 91oct and 100oct that was equivalent to 96oct. I didn't have a chance to put it up earlier. There is a video of the dyno being performed as well, but I'm waiting for RdSport to email it to me. As PencilGeek metioned in his project thread, ECU tunning is still to be completed, along with other things.

Mods:4.6L RdSport Stroker,AA Pulley, Gruppe M Intake, 3.62 DCT Diff(3disk,30/90 ramps)

[dogears]

Thanks!

Can't wait to see how a tune addresses the nasty torque dip you guys are getting.......

[SlammedR8]

WOW!
Awesome, I didnt know you were having the stroker motor done...nice job man!
How do you like it ? Pics of engine?

[brusso]

At least your graph continues to climb until redline ..... The octane must have helped. Are you running catless ro HF cats ?

[JMD0977]

Originally Posted by slammedm3

WOW!
Awesome, I didnt know you were having the stroker motor done...nice job man!
How do you like it ? Pics of engine?

I drove it a couple of time in Cali in December and January while it only had the engine and all other components were stock. I have not had a chance to drive it putting these numbers down since it is getting shipped back to FL this week. I cant wait.

Originally Posted by brusso

At least your graph continues to climb until redline ..... The octane must have helped. Are you running catless ro HF cats ?

Yeah. I will re-dyno it in FL with 93 oct at sea level with SAE. The run in blue is 91 only. The run in red is 96 equivalent. Difference was not much. Just a bit more power and torque. Im sure with straight 100 after the ECU has adapted, the gains will be nice. It has 200 cel cats, for now. Once the car gets to FL, most likely will run catless since we dont have emissions tests.

[duk]

Very nice... roughly 510-520 chp?

[JMD0977]

Originally Posted by duk

Very nice... roughly 510-520 chp?

Yeah... for now.

[KonigsTiger]

If you mixed 50/50 100 octane and 91 octane it should yield 95.5 octane, but don´t think that is enough of an octane boost to get you much. Plus, you probably have to run it for a while before the engine readjusts to that fuel, I don´t think is a matter of a few minutes. In any event, you results are consistent with what PG has gotten and we should easily be able to extract 535bhp or so. Not too shabby in my book. lol!! Congrats.

[JMD0977]

Video of my car being dynoed by RdSport:

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[KonigsTiger]

Freaking amazing!!!!! Wow!!! Thanks for posting the vid.

[Akara1]

Does the stroker lower the redline?

[Epacy2]

Originally Posted by PencilGeek

Yes, and no. The redline is really determined by the location where the motor reaches max horsepower. On the stock motor, maxHP occurs around 8300 RPMs. On the stroker motor, maxHP is reached around 7700 RPMs (on 91 octane). But yes, the motor will still rev out to 8400 with absolutely no difficulties -- but since you're losing power at that point, there's no reason to go beyond maxHP.

Well said. Makes sense.

[mixja]

Originally Posted by PencilGeek

Yes, and no. The redline is really determined by the location where the motor reaches max horsepower. On the stock motor, maxHP occurs around 8300 RPMs. On the stroker motor, maxHP is reached around 7700 RPMs (on 91 octane). But yes, the motor will still rev out to 8400 with absolutely no difficulties -- but since you're losing power at that point, there's no reason to go beyond maxHP.

Depends on how much the torque drops away, but given the flattish nature of the curve I'd say you'd still get more performance by redlining to 8400 as your torque at the wheels at 8400 in lower gear will still be higher than corresponding RPM in the next higher gear. Definitely I'd say on the MT, still likely on the DCT even with its closer gear spacing (except 5th to 6th, which are very closely spaced)...

Interesting the same dip in torque between 2500-4000RPM exists on this RS46 as well - definitely looks like tuning though given how rich it is running at that point...that aside, the RS46 is definitely a monster though!