Stop in for a cup of coffee

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Watch out D daddy. Young gun Ryen is movin in!
received_1291614247649998.jpeg
 
dukeboy_318 said:
desktop dyno is all gross
Click to expand...

Performance trends has some better software, but also more expensive...

One of my friend's son used the Performance Trends dyno software to design a cam for his dad's 340 duster. Then plugged the results into a racing simulator and had the cam custom ground... When installed in his dad's Duster, he came within .1 seconds of the software prediction... Pretty amazing...
 
Ddaddy said:
That makes sense. So reduce the numbers TMM posted by 30% to get net engine HP at the flywheel. That makes his 330 HP number go down to 231 HP. Interestingly, that is very close to the published SAE net HP measurement made by Chrysler on the 340 engine which was 235 HP.

The original gross 275 HP rating Chrysler gave the 340 was intentionally underrated and was proven to be so once the SAE net measurements were published. If the engine really only had 275 gross HP, it would have gone down to 192 HP net.
Click to expand...

Chrysler under rated the 340 to keep it in the class with other small blocks... NHRA caught on and factored it up into the bracket with the 383 and 396...

A guy named Hemi Greg I knew that used to cruise around here back in the 80's called the 340 "the small block that doesn't know it"... It doesn't know that it's supposed to taper off on the top end and keeps on going... :steering:


Eddie's 340 that we built for his 69 GTS beat his brother's fully restored stock 383 4 speed Road Runner.... :lol:
 
halifaxhops said:
Puncktuaten whats that for?
Click to expand...

Because it can change the meaning...


Example:

**** I know him I know him he used to come over to our house and eat chicken **** I know him....

With punctuation:

****, I know him, I know him. He used to come over to our house and eat chicken, ****, I know him....


In the second sentence, he's not eating chicken ****.... :eek:
 
Tooljunkie said:
Looks like my buddy will be shutting down the body shop. The auto insurance company is pushing the limits of compliance,basically forcing the little guy out of business. That place has been running for 50 plus years.
Was throwing around the idea of moving my auto repair business in there, but the overhead would kill me.
Click to expand...

That sucks...
 
Ddaddy said:
The original measurements were done as gross HP using engines without accessories, drive belts, etc using header type manifolds. By 1971 they all switched to using the SAE net HP requirements after California made it a Law that they couldn’t advertise HP unless it was done by the SAE method.

The net HP measurements require that the engine is in fully stock trim with all accessories attached and using stock exhaust manifolds and exhaust pipes.
Click to expand...

They also adjust for temperature and elevation in the later ratings... To try to make the comparisons more true...
 
Ddaddy said:
The interesting thing is that the modern certified SAE net HP rating that everyone uses requires an SAE observer to be present when the randomly pull a car off the assembly line and do the test. The manufacturer is then allowed to claim a HP rating that is +/- 1% of the measured value.

Chrysler, beginning with the Viper, has consistently claimed the lower number because they say that they would rather have customers getting more HP than claimed rather than less on an average basis.
Click to expand...

When I was at the engine factory, the dyno room did pull on one of each production engine every week and sent the results to us... We never met or exceeded the advertised horsepower like the old engines did... We typically ran 30 HP less than advertised... I asked the head of engine design for our engine why can't we dyno what the engines are rated at... He replied, "We built one that did"...

I replied, "The customer does not care what you are capable of pulling on a custom built prototype, but wants to know what his engine can do"...

********************************************

One time the weekly dyno report had our engine with a flat line from 3000 - 6000 RPM... I called the dyno room supervisor and left him a voice mail telling him that the curve did not look right and asked if there was something wrong...

I bumped into him on the floor a couple days later and he thanked me for the phone call... They had looked into it and found out that one of the transducers on the dyno had failed... They repaired it...

He also commented to me that I was the only one in the front office that noticed... Which told him that I was the only one that actually paid attention and looked at it... He made the comment, "I don't know why we do that if nobody is going to pay attention to it"... He was glad to see that one person paid attention to the weekly dyno results...

How sad is it when all of the managers at the engine plant and CTC who were on the distribution list do not even care enough to look at it... :realcrazy: :mob:


Another time the 3.3 L engine pulled 180 HP...

3.3 L usually pulled 130 - 140 HP... The 3.8 L would typically pull 170 - 180 HP... (3.3 L advertised at 180 HP and the 3.8 L rated at 215 HP)...

I called the dyno supervisor and left a voice mail and asked if they had the data for the 3.8 L confused with the 3.3 L... He got back to me and claimed that there was no mistake and that it was a 3.3 L...

I still to this day believe that it was data from a 3.8 L on that pull... I never saw a 3.3 L pull more than 150 HP before or after that...

Again, none of the other engineers or managers questioned those results, both at the assembly plant or CTC headquarters, and all were on the distribution list...
 

Finish up the pos,clean shop and call it a wrap. Load centre section and trade it for a driveshaft for the barracuda.
Take it easy tomorrow then bugger off sunday for a short holiday.
Block off driveway,keep traffic out
And maybe driveway wont be all tore up.
 
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