YOOOO
Veteran CEG'er
Running on unleaded maple syrup too!!
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253whp / 223 tq
- Thread starter Manimillion
- Start date
dairdevyld
Veteran CEG'er
Their quarter miles are shorter than ours, so I figure he actually ran a 15.3 like most people on this site.
You mean 1/4 kilometer, lol.
BAD SVT
Addicted CEG'er
Then again this is Canadian math here. Their quarter miles are shorter than ours, so I figure he actually ran a 15.3 like most people on this site.
Had me going there for a second:laugh:
michcougar
CEG'er
Teebs on here was on the same dyno with a full 05 3L with 3L cams and put out 208whp, 204ft/lbs, same tuner...same dyno. I think you can rule out the happy dyno theory.
99Mystique ATX
Hard-core CEG'er
True but a quick search on the Capaldi final drive says that it's a 4.5 FD. That provides a ~10.8% mechanical advantage over the standard 4.06 final drive. If you calculate the HP/TQ based on the gearing change (so we're comparing apples to apples here) it'd be more like 228HP/201TQ.
FastFord
Hard-core CEG'er
Mani, was the last dyno before the new tune done with the 4.5FDR?
mrspindlelegs
CEG'er
No, the dyno is still suspect. Where is the proof that the dyno was in proper calibration at the exact time the tuning was done?
Furthermore, this specific result is so far beyond what anybody else has documented for similar builds that you must immediately question the dyno equipment (common sense).
I for one am not buying the 253 Hp output claim (for now).
The car should be taken to a different dyno (possibly two) and do a few pulls. If the other dynos show higher than standard outputs seen on other people's builds, then I will become a believer.
aboythatskates
Hard-core CEG'er
YOOOO
Veteran CEG'er
Yeah, because Steeda is such a podunk shop
mrspindlelegs
CEG'er
My statement made no insinuation that Steeda's shop is a hack operation. Equipment can go out of calibration simply due to wear and tear and it is not always caught right when it first happens.
mrspindlelegs
CEG'er
then give him a 50 bill and have him go dyno it somewhere else...it aint free
If I get an unexpected result like this on my project, I'll fund alternate Dyno runs. However, I will not fund somebody else's project. It's up to them to validate their results. I'm just pointing out that these specific results are definitely questionable.
aboythatskates
Hard-core CEG'er
he has only himself to prove is just what i was trying to say. he doesnt have to go out and do more dyno runs because somebody doesnt beleive
RFcsvt
Veteran CEG'er
Is this pretty accurate? I assumed it would be this way but wasn't sure.
morbid
Hard-core CEG'er
I fully agree and refuse to accept those numbers unless I borrow Mani's car for a month (at least) and get it dyno'd locally.
Ok, well maybe not. I can see your point... I suppose I'd want to double check my #'s if they were so much higher than other similar builds.
99Mystique ATX
Hard-core CEG'er
Sure is, that right there is some very basic physics. That puts his HP numbers at the high-end of most 3L builds we see here which we would expect based on the SVT cams, true dual exhaust and st220 intakes. The torque is probably lower than expected based on the use of SVT cams which were designed to be run on split port intakes so while they do work and produce good HP numbers they aren't exactly ideal for an oval port engine and it shows in the low(er) torque numbers.
Here's a link with some explanations and calculations... http://craig.backfire.ca/pages/autos/horsepower
But wouldn't that mean they have to input the ratio for every different car they put on the dyno? Given that, how do you know they didn't input the correct final drive? They'd also have to account for which gear the pull was made in, size of the tire etc... I'm not sure this is correct.
FastFord
Hard-core CEG'er
It all makes sense with the 4.5 in there since 228whp sounds more reasonable. Either way he is still putting 253hp to the ground which is pretty impressive.
99Mystique ATX
Hard-core CEG'er
Not exactly... The dyno is going to be measuring the horsepower and torque that the car is putting to the ground. If they were going to calculate Brake or Crank horsepower that would be a different story. Dyno pulls should be made in 4th gear as well as this is the closest to a 1:1 gear ratio you will get (IIRC it's 1.03:1 in the MTX-75). Thinking about it, I suppose tire size could have an impact as well. I suppose the assumption there is that you are running a stock (or very close) size.
I completely agree that Mani made some great numbers! We just need to keep in mind that some of that definitely came from the FDR change and the calculations I made were just to help put it into perspective what kind of power he would be making with a stock FDR.
FastFord
Hard-core CEG'er
I completely agree that Mani made some great numbers! We just need to keep in mind that some of that definitely came from the FDR change and the calculations I made were just to help put it into perspective what kind of power he would be making with a stock FDR.
Exactly. That FDR is going to make a pretty big difference, and 228whp sounds very accurate considering whats done to the engine. So forget about the "happy dyno" and not believing the numbers people.