In my town and on line people have been giving a lot of different numbers for what stock cars are putting to the rear tires. I thought I would bring this to the best site online to debate something like this so people understand the amount of hp lost from the crank to the rear tires. Too many people think that the HP that the dealer gives them is what the car has to the rear tires and not to the crank. The list is simple but only for V8 motors.

corvette's can join in too. 2006 Z06 and C6 are some number I have not heard too much about.

1. SS Camaro you choose the year LS1
2. Z28 Camaro 95 LT1 and newer LS1
3. Trans AM WS6
4. Stock LS1 Trans AM
and if you like
5. Mustang SVT Cobra
6. Mustang GT

I am trying to make this list because people think that because it says 330hp they think they have 330hp.I have a 95 Z28 Camaro dyno 314 RWHP with just bolt ons. The other thing I would like to know is the amount of horse power lost from crank to tires. I adv people around 40 to 80 HP for the fact of weight, torque, resistance, and if your on the street, tires and suspension. Hope you can help solve the problem. Yes I know that the numbers I gave are not completely right thats why I'm here.

 

In my town and on line people have been giving a lot of different numbers for what stock cars are putting to the rear tires. I thought I would bring this to the best site online to debate something like this so people understand the amount of hp lost from the crank to the rear tires. Too many people think that the HP that the dealer gives them is what the car has to the rear tires and not to the crank. The list is simple but only for V8 motors.

corvette's can join in too. 2006 Z06 and C6 are some number I have not heard too much about.

yOU CAN ADD TO THE LIST OF CARS AS WELL. THE MORE NUMBERS THE BETTER

1. SS Camaro you choose the year LS1
2. Z28 Camaro 95 LT1 and newer LS1
3. Trans AM WS6
4. Stock LS1 Trans AM
and if you like
5. Mustang SVT Cobra
6. Mustang GT

I am trying to make this list because people think that because it says 330hp they think they have 330hp.I have a 95 Z28 Camaro dyno 314 RWHP with just bolt ons. The other thing I would like to know is the amount of horse power lost from crank to tires. I adv people around 40 to 80 HP for the fact of weight, torque, resistance, and if your on the street, tires and suspension. Hope you can help solve the problem. Yes I know that the numbers I gave are not completely right thats why I'm here.

 

I've read where as a general rule of thumb you take 20% off of your base hp(flywheel) for power lost from the tranny, rearend etc. But I'm not sure that the hp ratings for the newer cars isn't rwhp. I know in the old days(60's and 70's) it was at the flywheel but I thought they changed the way they did it. Not sure though

 

Practically all ls1 cars, fobody or vette, will put out around 300 RWHP +/- 10. Youll see some higher and lower numbers depending on the dyno, but the overwhelming majority dyno quite closely. Vettes and ram air cars have slightly less restrictive exhaust accounting for a few additional HP over z28s and T/As, but little real world HP is gained by the ram air, especially with the stock rain baffles in place.

 

Yea, I've heard by many that the LS1 cars were under-rated from the factory so I too would probably say around 300rwhp from a stock LS1 with the ram-air versions being slightly higher like GuitsBoy said probably around 5 to 10 more hp. Typically people calculate somewhere between 15-20% for valvetrain loss but it too can vary a bit. It's just according to what the company says it has stock, like you can't really calculate a 20% loss on LS1's because they basically have more than 305-325 at the crank. I actually have a post right now in the LS2-LS7 forum about the LS7rwhp and I've been getting responses around 450-470rwhp with the C6's being around 340-350. Personally I think the Mustangs are over-rated on power. I've driven in many stock and modded Mustangs and I haven't been impressed yet but that's just me.

 

You did mean powertrain loss right, cause I don't think you lose 15-20% from your valvetrain.

 

Moving this to the enthusiasts forum. This has nothing to do with LS1 Internals.

 

1. appx 300
2. appx 240
3. Same as the Camaro
4. Same as the Camaro
5. Depending on year (we'll just go with 03/04) appx 360
6. Depending on year (we'll do 05+) appx 260

 

Yea, I meant powertrain. My hands get ahead of my brain sometimes .

 

I had a completely stock 2002 Camaro SS dyno 306 RWHP on a dynojet.
LS1 SSs, Z28s, Formulas, Trans Ams, WS6s, etc. dyno roughly the same, there's no real difference.

The thing about dynos is that they're a good indicator of how much power a car makes, but not a rock solid truth. The same car on the same dyno on different days can give different numbers. They will be close to each other, but different. Different dynos (namely Mustang dynos and Dynojets) can give very different numbers- 20 to 30 RWHP differences aren't uncommon.
Also, the percentage for drivetrain loss is a shot in the dark. Some people like to use numbers as high as 18 or 20% so they think their car is more powerful. Others use numbers like 10 or 12%.

Personally I think the percentage method is mostly bullshit. Say you have a Camaro that makes 300 RWHP stock and you factor a 15% drivetrain loss. That would give it 345 HP at the engine. If you mod the crap out of it and it makes 500 RWHP, using the same percentage method you would have 575 HP at the engine. But if the drivetrain is the same then why do you lose more power through it as you add more power? If it takes you 5 pounds of force to open a door, and you work out and put on 40 pounds of muscle, it isn't going to take more effort to open that same door.

 

i believe the 03-04 cobra's dyno between 350-360 w/ some factory freaks up higher than that.
99up 2valve gt's dyno around 220-230 w/ some dogs down closer to the 200 flats.
As far as the NON PI headed 4.6L mustangs i don't know the number but its pathetic
LT1's dyno is differant cause the cars are older and how there owners treated them really shines through. 250-265 is common.

 

i saw HP tv they dynoed the old red 5.0 mustang that the host had. it dynoed 167 to the wheels. that's lower than i would have thought.

 

Remember and LS1 is an LS1, and the differences in stock cars isnt going to be huge. Rule of thumb for ls1 is 300 rwhp id say, obviously some are beasts and will put down 310 stock, and some are duds and get 290 or so.

Yeah, the later 90's GT's (94+) dyno under 200 easily.

 

My SS stock did 304rwhp 312rwtq

 

Yea but you also have to put more effort because that arm is definately going to be heavier. You might be able to push open a bigger and harder door, but no matter what, there is going to be a set number of horsepower that it takes to turn gears, due to friction.