Speed inc. 427.
Just out of curiousity ( I get ~131mph for 515 rwhp using my usual calculator) LastLS1 you say in your sig the converter was locked for the 518/485. I know you can get a lockup 350, I had one in my last car, so i was curious if the numbers you quoted were 'locked' or not.
Just curious, with the newer dynojet software you cant tell if the converter is unlocked anymore since it doesnt show the big torque spike like it used to..
Just curious, with the newer dynojet software you cant tell if the converter is unlocked anymore since it doesnt show the big torque spike like it used to..
Right...the calculator is wrong and your car is performing up to spec. 
I really like the guy w/ the 500rwhp heads/cam car. Do you realize a 427 with 500rwhp will smoke a 346 w/ 500rwhp all day long? The big arm in the 427 will make a lot more power all over unlike the very peaky nature of the 346 car.
Prostockjohn...475rwhp and 123.
Bigbos...455rwhp and 121
Onebadws6...472rwhp and 126.
For everyone except silverghost, it sure looks like that dyno you all use reads WAY high. My pops car went 118 with <350rwhp at 3600 lbs. Put in the numbers and it works.
Let me break it down for your guys...either 1)your chassis holding back your car big time or 2)you're not making the power you think you are. I am leaning towards the latter choice.
I am done with this thread. I can only prove my point to people who are willing to open their minds and look at things logically.
I really like the guy w/ the 500rwhp heads/cam car. Do you realize a 427 with 500rwhp will smoke a 346 w/ 500rwhp all day long? The big arm in the 427 will make a lot more power all over unlike the very peaky nature of the 346 car.
Prostockjohn...475rwhp and 123.
Bigbos...455rwhp and 121
Onebadws6...472rwhp and 126.
For everyone except silverghost, it sure looks like that dyno you all use reads WAY high. My pops car went 118 with <350rwhp at 3600 lbs. Put in the numbers and it works.
Let me break it down for your guys...either 1)your chassis holding back your car big time or 2)you're not making the power you think you are. I am leaning towards the latter choice.
I am done with this thread. I can only prove my point to people who are willing to open their minds and look at things logically.
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The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Wow, all this over whose internet calculator can predict how accurate your car will run. Pretty pathetic justification for arguments. The only real test is the track, but that will never indicate the true potential as there are way too many variables. You only have to look at all of my old timeslips and run data to find out that calculators don't mean anything under varying conditions. It's also why dyno racing is so appealing to people. It measures unrealized potential instead of trying to actually get it down the track to meet expectations.
In most cases it's your chassis holding you back, not the lack of horsepower or torque. A tenth of 60' is two tenths up top. For non-turbo cars (and some turbo cars) you can take your 1/8th mile ET times 1.555 to estimate your 1/4 within reasonable approximation. Turbo cars are harder to justify that way because they build up a lot on the big end. For TH400 cars, stall speed, flash point, tire pressure, trans temp, suspension settings (shocks, pinion angle) all have a lot more to do with the equation. And then there is the track as well. Each one is so different that you can get some very drastic results across the country. That's partly the reason for the DA calculations, so that you can set a reasonable expectation for other locations under similar conditions.
To complicate the math even further, depending on what components are used in a car will lead to huge differentiators in ET and MPH even though the HP may be exactly the same. FWIW, I tried both of the calculators mentioned here and they are so damn far off from my horsepower numbers that I just about flipped out of my chair.
Personally I think that the car made really nice numbers for a TH350. Anyway, I think that's enough ***-slapping for one day. Pot calling the kettle black if you ask me.
In most cases it's your chassis holding you back, not the lack of horsepower or torque. A tenth of 60' is two tenths up top. For non-turbo cars (and some turbo cars) you can take your 1/8th mile ET times 1.555 to estimate your 1/4 within reasonable approximation. Turbo cars are harder to justify that way because they build up a lot on the big end. For TH400 cars, stall speed, flash point, tire pressure, trans temp, suspension settings (shocks, pinion angle) all have a lot more to do with the equation. And then there is the track as well. Each one is so different that you can get some very drastic results across the country. That's partly the reason for the DA calculations, so that you can set a reasonable expectation for other locations under similar conditions.
To complicate the math even further, depending on what components are used in a car will lead to huge differentiators in ET and MPH even though the HP may be exactly the same. FWIW, I tried both of the calculators mentioned here and they are so damn far off from my horsepower numbers that I just about flipped out of my chair.
Personally I think that the car made really nice numbers for a TH350. Anyway, I think that's enough ***-slapping for one day. Pot calling the kettle black if you ask me.
Thread Starter
6 Second Club Moderator
iTrader: (7)
Joined: Sep 2002
Posts: 3,682
Likes: 0
From: Lombard .IL
This post was to give props and info for those interested. ALL MY STATEMENTS ARE FACTS! Lt Holmer, I don't know what to tell you. You aren't pissing me off or proving a point. My guess is that you have a slow car that couldn't sit next to mine. I don't really care. If guys are looking for a good motor set up, I'm giving you some info. I don't need any pats on the back. I did it for Speed inc. and to compare info on the board. Share ideas. Someone asked me if my numbers were locked on the dyno "YES". Lt holmer, you don't believe me, I DON'T CARE! Build a LS1 and show us how it's done! Or if you like to bet, any amout, in cash and I'll show you in person. Anyways guys, getting back on track. I,m still trying to get the nitrous done before the snow flies, and report some numbers. Andy.
Originally Posted by LASTLS1
I did it for Speed inc.
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Originally Posted by Camaro_SLP
Why? Are you a sponsor for them? It seems like a lot of money to spend, to do for a strong company. Build the car for yourself, not for a company.
Thread Starter
6 Second Club Moderator
iTrader: (7)
Joined: Sep 2002
Posts: 3,682
Likes: 0
From: Lombard .IL
Originally Posted by DERTY
I think you missed the point. He didn't build it for Speed Inc. He made the post for Speed Inc.
Andy.......thanks for the props. We are glad to hear you are happy and the car is running great.
maybe just to make LTLHOMER happy you can set it up for HP
We can easily retune it,put a 4.30 gear in it and let the HP/MPH shine.
I can't wait to see you **** yourself when you crab the hose....
see you soon
Larry
maybe just to make LTLHOMER happy you can set it up for HP
We can easily retune it,put a 4.30 gear in it and let the HP/MPH shine.
I can't wait to see you **** yourself when you crab the hose....
see you soon
Larry