True, but the LSD will improve all around drive ability. The LSD also allows for even power distribution to both rear tires. OEM offers a 70/30 split? So yea, I would say the LSD would be a great addition for the 1/4 mile, especially on a 2 ton super tanker. lol Again, if you are looking to build a 1/4 mile race car only, then you should be looking in a different direction. If you are looking to build something that fairs well on the 1320, but also is a great cruising vessel, then the money spent on some of the items mentioned is a must. IMO As for the LT's, yea no much improvement on a basically stock motorm but if you are adding some serious power adders, then you will need the LT's. And by the way, Kooks is not the only option today for LT's. Headman Headers has recently announce their version of the LT's for the 5.7 and 6.1 for just under $500.00.
Quote: Originally Posted by budoboy Thanks for taking the time to talk to us. I love my Charger SRT8 and appreciate that so much performance was made available for such a reasonable price. Do you see an advantage to getting a Quaife LSD for drag racing? I have ported heads/cam/2800 stall converter and have just bought drag radials. I'll be upgrading my halfshafts and wonder if I should bother with the Quaife if I'm only going to be drag racing. Do you have any recommendation on best bang for the buck weight savings at the track. I want to be stock appearing so I was wondering if there are any boat anchors underneath the car that I can live without I love showing up Mustangs and Corvettes at the track with my 4-dr beast. (end quote) No. The Quaife will bias while going straight due to slight variations in surface and tire diameter and cause drag, hurting you all the way down the track. The indepenent suspension at the rear means the right does not unload and the left loading under power like a live axle car. Make sure the rear tires have equal corner weights and you should not need the limited slip. Lightweight wheels are worth it. So is putting the driver on a diet! The stock seats are heavy, too. ------------------------------------------------------------------------------------ Here is what the SRT engineer wrote. Feel free to dissect, debunk, give your opinion.
The LSD is a interesting discussion. First there is no doubt that it does add to the drive train loss thus eating a little bit of HP. But the fact is you will get more consistant launches. There are a ton of guys getting good two wheel burn outs on the open dif. But these are the same guys running on very good tracks. I spent many times running Sac and it was always a gamble on if I'd peg leg the POS. So for me, the Quaif was some of the best money I've ever spent on the ride. LT's, well I have yet to ever see where they made a difference on our rides for stock displacement even with a full build. Now, punch it out to a 426 and or stuff a blower on it with big boost.....that's a different story. And at that point, it's not the LT's that make the difference, it's the size of the primaries and collector.
I think that makes sense with respect to the weight shift and the effect that has on traction. With independent suspension you're not going to get as much of weight transfer difference to the left rear wheel. Engine torque on the motor mounts raises the right front. With a live axle you will also raise the right rear a bit too right? De-weight the right rear and you lose traction there. The independent suspension helps this. So they're saying that since you have even weight on the right and left rear tires you don't need an LSD. That's fine, but 1) I'm still under the impression that rotational torque, on an open differential will drive the right wheel more than the left. I suppose this could be minimal relative to 2) You're not going to have perfectly equal traction at each wheel due to the track surface. Better prep minimizes this but doesn't eliminate it. So I think the differential will drive the wheel with the least resistance/traction. If you break one of them loose the traction drops significantly. For those reasons I would think a LSD to be a plus even with some drivetrain loss and possibly extra weight (I think that's what Cam said)?
I think anybody who's blown a few launches due to the peg leg burnout not heating both tires up will quickly argue we need a LSD. Talked to Richmond at PRI and they said they had one that should be available 4-5 months. Wavetrac said 2-3 months for theirs. Hopefully this all pans out and we have a few choices fairly soon.
That would be great, but considering other promises of products that NEVER made the time given, I wouldn't hold my breathe. lol
Yeah, especially with the economy the way it is. After seeing hardly anyone jumping on gears for these cars I would be dissuaded if I were a manufacturer. There are only so many SRT8s on the road and only so many people willing to mod them let alone who can afford the thousands necessary to go to a LSD.
