OshawaHHRss

Basically I blew up my gt2871 and bought an s257sxe. Doing wiseco pistons, zzp rods, stage 3 cams, 82# valve springs w. titanium retainers, and neutral balance shafts, meth and maybe an EBC. Heat and cryo treating everything we can in the 4t45e and might have some parts made, team green LSD, 3.69 FDR and a high stall tc. Aiming to break into the 10's and make 550whp. Has anybody made anywhere close to that power with the automatic?

Thanks in advance

Oldblue

Nope I can say I have with an HHR. Easy on the loud pedal or you'll be spitting out axle shafts!

OshawaHHRss

I'm probably heat treating and cryo treating them

XtremeSS

10s? Sounds like we have the same goals

OshawaHHRss

Yeah we do haha. I still don't know what transmission I'm found to use. Either 4t80e or 4t65e-hd