Hi there, I know the F-body LT1's are rated at 275 hp, and 320 ft, but what does a stock LT1 powered LT1 throw down to the rear wheels?

Thanks.

 

I believe most stock LT1s put down 235-240 at the rear wheels.

 

Mine put down 256hp stock.


-Dave C. '97 Z28

PS: This was back in '97 when all LT-1's put down ~250rwhp stock. Once the LS-1s came out, somehow miraculously all the LT-1s now put out 280-300rwhp stock.

 

Thanks, that's why I've been so confused. Looking at a lot of dyno results and seeing people at the 290 ish mark with boltons, and I'm thinking, how in the heck does the car only pick up 15 HP with boltons.

Makes a lot more sense now!

 

Is your car an M6?

 

M6 also average 10 more rwhp then A4.

 

I heard realistically its 240~250rwhp for A4 and another ~10 on top for the M6. They vary depending on the car...but Ive seen some people post low 26x rwhp stock and high 26x/27x rwhps numbers with limited mods.


Take the 275 rating... and I took off 15% (manual) and got 233.75, I used 18% for the A4 and got 225.5rwhp. Its safe to safe GM underrated them.

At 300hp 15% is 255rwhp M6 and 246rwhp A4 (thats more like it )

Anyway you look at it... the LT1 is an easy 300hp motor.

 

I put down 247rwhp with a CAI, so I was pretty close to stock. thats with an A4.

 

I put down 258hp 290tq A4 I was thinking that was kind of low.

 

My 93 TA put down 252HP, 291TQ with a K&N, flowmaster muffler, and a hypertech chip.

 

Yep.

1997 Camaro Z28 M6
One of 880 Bright Purple Metallic cars.

 

I've always gone with 255 rwhp and 290 rwtq for the M6. This seems to be right on average from all the dyno plots that I've seen of stock M6 LT1's.

In the 93-95 models, that really makes it look like GM under rated them. That's only 7.3% drivetrain loss (255fwhp / 275rwhp), which is very low drivetrain loss even for a manual tranny. If you take the '96-'97, which were rated at 285 hp, then it's still only 10.5% drivetrain loss.

Dan

 

I think it was Injuneer who posted results of engine and chassis dyno difference, and I think he came out to about 12% total loss through the M6.

 

Wow, that is rather impressive. Any official on the 4L60E? Ive always gone by 18% ... I know its not as horrible as other trannys that do 20~25%,

 

Carnutz just dynoed his car last weekend with a half asses CAI and hooker cat back and put down 275rwhp through an M6.