weakest h/c ever?
On The Tree
Joined: Aug 2011
Posts: 105
Likes: 0
From: Fitchburg, MA
yes it was retuned, and the dyno was from the same place
Your numbers do not seem unreasonable to me; honestly, the 430HP claims from a cam and a ported throttle body seem a lot more ridiculous than the numbers you've stated. My car made 263 bone stock with 47K on it and 276 with a mild tune; you are now running 150% of that, normally aspirated, with a driveable car. Not bad at all in my opinion.
C
Smokeshow, you have some of the lowest dyno numbers I've ever seen for an LS1 car, let alone an M6. Comparing your car to the OP's is not worthwhile. Most six speed LS cars put down 290-310hp in stock form. What numbers is your Z putting down now with the H/C installed?
OP, your numbers aren't that bad. I would honestly be disappointed just like you, but it should still be a quick car! Save for that FAST intake.
OP, your numbers aren't that bad. I would honestly be disappointed just like you, but it should still be a quick car! Save for that FAST intake.
Launching!
Joined: May 2009
Posts: 283
Likes: 0
From: DFW,TX
On a car that made 270 at the wheels stock? 130 horses with an MS3 and headers? Man, I don't know about that.
This might be a dumb question, but you retuned with the new heads?
Are both dyno numbers from the same place? If not, forget about it; if so, as the other folks have said, dyno numbers are a pretty arbitrary thing. You aren't going to tape your dyno sheet to the windshield; does it FEEL fast? If so, why sweat the dyno sheet?
C
This might be a dumb question, but you retuned with the new heads?
Are both dyno numbers from the same place? If not, forget about it; if so, as the other folks have said, dyno numbers are a pretty arbitrary thing. You aren't going to tape your dyno sheet to the windshield; does it FEEL fast? If so, why sweat the dyno sheet?
C
So yeah you can gain 100-120rwhp from cam headers and tune. Basically I make about the same power as the op and I'm a cam only Gto lol these numbers are horrible for having AI 243's. Something has to be wrong...
You are within 5 or 10 hp of mostother cars with similar mods, it could all be in how high the guy on the dyno went with your car rpm wise or maybe could have added a little bit of timing with some race gas like lots of dyno queen guys do, i see them day in and day out at my shop, not too unusual or low, actually seeing one make 430-440 with those mods is on the less common side for a stock block... Hell my car with a decent cam, headers and exhaust only made about 380 and i have access to a dyno whenever i want it, lol... don't be too concerned, just have fun with it...
On The Tree
Joined: Aug 2011
Posts: 105
Likes: 0
From: Fitchburg, MA
you have some of the lowest dyno numbers I've ever seen for an LS1 car
I have not pulled the car on the dyno since the headwork and cam because I frankly don't have the time or the money right now for a dyno tune, but I expect to do so in the next couple of months; I'll be interested to see what the car does now that it is properly maintained. I know that it spins the 315 rear tires at 4000 in first gear with 3.42s after grannying out of the hole, so it is doing OK...
C
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
thanks for the comments guys. I guess spending $1200 and only gaining 30 wheel is a little disappointing. but I am putting it to the test tonight racing a c6 that has raced many other h/c cars. so we will see.
I put down 415 rwhp with the MS3 cam only. But like they say take it to the track, dynos are for tuning and tracks are for racing. An E/T means more than rwhp to me.
But in my sig I put the gains i received from different mods.
But in my sig I put the gains i received from different mods.
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
On The Tree
Joined: Aug 2011
Posts: 105
Likes: 0
From: Fitchburg, MA
Interesting that so many cars that were rated at 300 or 310 crank horsepower SAE are making 310 to the wheels twelve years later.
I had an 350ish crank horsepower small Chevy in a pickup in high school and a shiny new 2001 Z28 M6 a few years later. Unless my truck was really making 400, The Z28 was not a 350 horsepower car, which it would have to be to put 310 to the wheels.
After reading this thread, I now have even less faith in chassis dynos than I had before I bought this car. I'll still dyno tune the car so we know it is running properly at WOT, but methinks the power numbers will be pretty arbitrary. It puts a smile on my face when I get on it; that's all that truly matters in the end!
C
I had an 350ish crank horsepower small Chevy in a pickup in high school and a shiny new 2001 Z28 M6 a few years later. Unless my truck was really making 400, The Z28 was not a 350 horsepower car, which it would have to be to put 310 to the wheels.
After reading this thread, I now have even less faith in chassis dynos than I had before I bought this car. I'll still dyno tune the car so we know it is running properly at WOT, but methinks the power numbers will be pretty arbitrary. It puts a smile on my face when I get on it; that's all that truly matters in the end!
C
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Your 2001 Z28 absolutely was a 350 hp car on an engine dyno. It probably didn't feel like it because of the stupid long winded gearing they put in the M6s.
Does it run good and pull hard? That's all that matters. My old 99 Trans Am put 303 to the wheels through an unlocked converter and would go 90mph in the 1/8th with 1.5x 60's.
If I was you, I'd just tell people it's making around 400 and then go out and show them your taillights.
If I was you, I'd just tell people it's making around 400 and then go out and show them your taillights.
If you poke around and do some research you will find the ls1 is a roughly 345hp engine. There is zero meaningful difference between the fbody ls1 and the Corvette ls1 other than the window sticker claiming the corvette made 340hp while the Camaro made 300/305/315. The Camaro/Firebirds were just severely underrated by GM.
