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It will be interesting to see which eclectic motor GM puts in the Grand Sport X, 160hp or 186hp. GM's uses the 186hp electric motor in the ZR1X for a few reasons. The first reason is that they needed more HP up front for better control and balance when combined with a 1064HP gas motor, especially when coming out of the corners. 160 hp was insufficient when the rear engine with 1064hp was overpowering the front engine. Second, GM wanted the electric motor to disengage at 160mph vs 150mph (Eray) so full combined power was available thru the quarter mile. Finally, to eliminate any turbo lag. GM increased the power output by spinning the electric motor up to 17k rpm vs 16k rpm (Eray). GM installed heavy duty bearings, HD input shaft, etc. The battery is the same 1.9kw as the Eray, however they made software changes to increase rpm and to make it all happen. The Eray uses 1.1kw and my guess is that 100% charge on the Eray is really only 80% capacity full. This allows increased battery longevity. It will be curious to see how many KW's the ZR1X will use? GM designed the X (or electric motor in any platform), to give greater confidence to the driver. I believe GM learned from its mistakes in marketing the Eray and the Grand Sport X will sell. We shall soon see what electric motor GM puts in the Grand Sport X, either way a great car!
Last edited by Mike's LS3; Mar 19, 2026 at 12:33 PM.
This guy got confirmation (at least to him, maybe not confirmation to others) that it will be the 186hp version to standardize production with ZR1X and a 535hp LS6 for 721 total hp.
It makes sense to have one electric motor (186hp) for all platforms. The Eray has evolved into the Grand Sport X. Finally, the electric assisted motor is the getting the recognition as GM failed in marketing the Eray. I do believe, the Z06 eventually will have a Z06 X model. GM spent too much time, money and research not to!
13:50 mark. Used extra battery energy to bring the hp up to 186.
Very interesting interview and how they were very conservative with their E-Ray battery discharge for longevity that they now know is unnecessary (17:15 mark or so). Basically their abuse tests show that the E system will last a long long time and by going more aggressive, the can use more and the life of the pack will not be degraded. The battery is capable of much more usage over its lifespan.
I love this tech. I am a big fan if the hybrid systems I think it will extend the ICE thanlfully with the byproduct being better instant power and even fuel economy without real world penalty for us drivers (non lightweight racecar enthusiasts).
I highly doubt the new GS-X will get the ZR1X front motor.
It's already been confirmed by multiple dealer sources that the new GS-X will come with the new 535hp LS6 and total combined hp of 721...You can do the math.
My guess is a 2.2 sec 0-60 and a 9.8 sec 1/4 mile with the new LS6 motor and ZR1X motor. Anyone else?
Originally Posted by 95bat
Chevy says it'll run 10.5 stock so I dont think an extra 65hp will drop that by 0.7 seconds. It will probably drop to 10.4 in the 1/4
I could see a 10.3 @132ish
My E-Ray today showed 182 186 over and over from the Electric motor. I'm assuming the X motor will go well over 200 if battery conditions are right.
Told the wife to capture that she missed the 186. Have seen over 190 at times as well. Funny to see in between a shift how the engine cuts power for a millisecond (the low hp figure) pardon the glare.
My E-Ray today showed 182 186 over and over from the Electric motor. I'm assuming the X motor will go well over 200 if battery conditions are right.
Told the wife to capture that she missed the 186. Have seen over 190 at times as well. Funny to see in between a shift how the engine cuts power for a millisecond (the low hp figure) pardon the glare.
The latest Drag Times video showed a high of 198 from the electric on their ZR1X runs. It cut to 100hp after 130 mph.
My E-Ray today showed 182 186 over and over from the Electric motor. I'm assuming the X motor will go well over 200 if battery conditions are right.
Told the wife to capture that she missed the 186. Have seen over 190 at times as well. Funny to see in between a shift how the engine cuts power for a millisecond (the low hp figure) pardon the glare.
You guys might be right but I was thinking the ERAY currently does 2.5 secs under best condtions. With an extra 20 ft lbs of torque from the ZR1X motor and additional low end torque from the new LS6 that should drop that time by at least .2 secs. And if that's the case, with extra HP from both power sources, the 1/4 mile should also see at least a .4 sec improvement in ideal circumstances. We'll wait and see but there's no doubt that the Grand Sport X will consistently deliver better numbers than the ERAY under the best conditions. I'm super excited. Just hope that ugly hood vent isn't there as in some of the renderings. I like clean lines myself.
I’m sure it’d be expensive, but I wonder if the older cars can be upgraded to the new motor.
If the motor case has the same dimensions and the axle shafts swap, it probably could be done. Of course, the software would need to be programmed. Who know, GM might have made the motors a compatible swap planning for the future.
It's already been confirmed by multiple dealer sources that the new GS-X will come with the new 535hp LS6 and total combined hp of 721...You can do the math.
535hp has been confirmed? That number is from 495/6.2*6.7 simple math which assumes it’s going to make the exact same hp/L which if the majority of the cubic inches are from an increase in stroke doesn’t typically result in that.
I would think GM would have a better chance from a supply standpoint if they sources two different motors, a shortage on a single source would impact two models….they would have a “Sophie's Choice” situation. . plus they haven't done that great of a job keeping up with the current orders...