World Record Holder for Modern HEMI Standing Mile

[bandit55]

2008 Challenger SRT8 World Record Holder for Modern HEMI Standing Mile

[hpe600rt]

cool

[Super Blue 72]

Nice! 

I wonder what mods had to be done to the engine/chassis to get this accomplished? 

[MizzouRT]

I found some more info at Speedy's garage, and clear the engine had upgraded internals, as they had run 186 with the stock (internal) engine.  Turns out there was plenty of excitement at the other end as the mile marker had blown down and he nearly overran the track!  See link for the details:

http://www.speedysgarage.net/challengerweb/challenger_events/tx_mile_3-2012/challenger_tx_mile_3-2012.html

[MizzouRT]

I found a thread on the build of the 200 mph Challenger, which has been featured in Car Craft.  The stock motor with a 2.8 KB supercharger made 533 RWHP on pump gas.  With race gas and tune, jumped to 757 RWHP & 682 torque and got to 183 mph in the standing mile.  Not surprising, that motor eventually failed with the stock internals.  The modern hemi has thin cylinder walls, so they tested blocks and found one that would hold 1,100 RWHP.  393 cubic inch, 3.6 KB supercharger, NOS, custom heads, ice box, CP pistons, Crower cam, ARP bolts, K1 crank, Melling oil pump, ice box for heat soak.  Custom transmission with stock 3.06 gearing.  I did not see any mention of chassis work at all other than some minor aero work on the front.  The factory spoiler failed at 177 mph into a 9 mph headwind.  Custom grill and headlight covers were added to reduce drag and the front air dam was strengthened.

[Super Blue 72]

Nice info, thanks! 

[Chryco Psycho]

Obviously had gearing changed , I think the top MPH with stock gearing is only around 175 but I could be wrong

[MizzouRT]

Obviously had gearing changed , I think the top MPH with stock gearing is only around 175 but I could be wrong

Good point.  They could've changed the ratios in the transmission?  Suspect their redline is somewhat higher redline than stock, but would be surprised if they did it all just by winding the engine tighter.  They mentioned using the stock 3.06 rear end gears, but there was no mention of the ratio in the custom transmission.

[ViperMan]

Obviously had gearing changed , I think the top MPH with stock gearing is only around 175 but I could be wrong

Is that with the Tremec??  I'm surprised that the tremec would only do 175 when in a Viper, it'll do 200+ on with a rear differential that's at least 4-point-something.  I wonder if the ratios are different between the Viper and Challenger versions...