Dyno results

[tmhutch]

So your pretty much saying a slower/underpowered car wins by default.

Alot of FI owners have experienced a solid beat down by a much lower powered NA combo. Now, let's be realistic. In the end, money no object for both camps, a forced induction combo will always produce more power than a naturally aspirated build but why will a naturally aspirated combo always beat a forced induction combo (all other things being equal) of the same horsepower? More power under the curve. Look at the comparison below.

Here are two Cobra's with the same "peak" horsepower. One is Naz's 460 horse big bore and the other is a typical pullied Terminator, also making a peak 460 horsepower.

When were talking about two skilled drivers in an all out acceleration contest, the engine stays within a narrow 1500 RPM power band between gear shifts. Notice how much broader the power curve is for a NA combo. The Terminator drops 100 horsepower over the 1500 RPM range. The NA combo: 50.

Naz's car would have killed this equally powered Termy (not to mention the more agressive gears usually accompanying NA Cobra's and the lighter weight):

RPM HP RPM HP
5700 407 4400 360
5800 413 4500 365
5900 419 4600 380
6000 424 4700 385
6100 429 4800 388
6200 435 4900 390
6300 440 5000 410
6400 445 5100 419
6500 447 5200 421
6600 452 5300 430
6700 456 5400 439
6800 458 5500 443
6900 459 5600 457
7000 460 5700 459
7100 461 5800 459
7200 461 5900 460

 

[olgreydog7]

The hate will always be there between Fi and NA guys , but dont worry the last time i saw ol droptop at the track that wonder car with all that power was running low 11s:burnout:..its so great its for sale

That's a big reason I stayed na. Hell, Naz went 10's with half the power:lol1: I wouldn't call his car a striped down track car either. Yea, he's got great supporting hardware, but it's still a driver.

 

[Nazman]

That's a big reason I stayed na. Hell, Naz went 10's with half the power:lol1: I wouldn't call his car a striped down track car either. Yea, he's got great supporting hardware, but it's still a driver.

Easy Tiger! ;-) My car is a full daily driver with leather, stereo, and all the goodies, and have been driven from SA to AZ to Las Vegas and back!

:beer:

 

[olgreydog7]

Easy Tiger! ;-) My car is a full daily driver with leather, stereo, and all the goodies, and have been driven from SA to AZ to Las Vegas and back!

:beer:

Exactly my point.

 

[na svt]

Todd, is that graph correct? Todd

 

[tmhutch]

Dead on. The listed numbers above have been transfered onto an excel chart for comparison. Only the RPM bands between the two curves are shifted so real world shift points for both combos could be illustrated. The BB dyno numbers are directly from Naz's combo from a couple years ago and the Terminator numbers are from a more recent, pullied, bolt on car.

 

[na svt]

Dead on. The listed numbers above have been transfered onto an excel chart for comparison. Only the RPM bands between the two curves are shifted so real world shift points for both combos could be illustrated. The BB dyno numbers are directly from Naz's combo from a couple years ago and the Terminator numbers are from a more recent, pullied, bolt on car.

I was misreading the lower part of the graph. I know understand it.

 

[tmhutch]

I was misreading the lower part of the graph. I know understand it.

Yeh, I should get rid of them. They dont mean anything.

 

[olgreydog7]

Compression Test results,
1,2,3,4=190
5,6,7=170
8=180

 

[olgreydog7]

Looks like cam timing issue right? I don't think I'll get to that any time soon. Oh well. I have the Focus fuel pump and a wideband to install this weekend. At least I will have a great tune. I love how it drives, so I guess I'll just chase a bad ass dyno sheet later. Thanks guys.

 

[tmhutch]

Compression Test results,
1,2,3,4=190
5,6,7=170
8=180

Nice you didnt have to spend untold hours and $ chasing a phantom issue. Glad you got it figured out. Great lesson for the rest of us too.

 

[kezell]

So with the compression results above, how much hp is lost with uneven compression like above?

 

[droptopsnake01]

I love how my tauras drives to!

 

[bullitt3350]

i know for a fact hp's dyno is good. I made 390 with my ported 03 cobra heads, Hp cams and a stock 01 intake.(engine only died becuse i spun it past 9k racing a GTO) (New motor low comp, stock jan 05 heads and stock 03 cams)I made 550 with my turbo at 10psi and 731 with mine on high boost. I have taken it to another dyno in town to make sure and its within 3 hp. They did all the tuning on my car.I have a wideband and its dead on the money..

 

[tmhutch]

I love how my tauras drives to!

Dude, what's with all the negativity? You need to get laid or something. I thought you just hated everything naturally aspirated but then I decided to "view more threads by droptopsnake01" and it turns out you're just an angry SOB. You have the most consistent string of negative derogatory posts I've ever seen. Have a beer and chill :beer:

 

[na svt]

So with the compression results above, how much hp is lost with uneven compression like above?

That's hard to say, but it could be anywhere from 10-30.

 

[kezell]

I love how my tauras drives to!

:nonono:

 

[olgreydog7]

I love how my Taurus drives too!

Fixed it for you

Care to race that Taurus? I love the way my truck drives too, but for different reasons. I would bet that my little 346 rwhp Cobra is a much better driver than your 900rwhp twin. I heard a rumor you're selling it too. So, I spent "too much" to make a car I love, but not an impressive dyno sheet, and you spent so much that now you have to sell it. Which one of us made the smarter choiceoke: If the rumor is true anyway:beer:

 

[olgreydog7]

So with the compression results above, how much hp is lost with uneven compression like above?

We will see. Running out of fuel at 6100 on a car that is supposed to peak at 7200 probably cost more power than having compression off <10% bank to bank. It may be a while before I can get in on a dyno again. They aren't open on Saturdays anymore and I'd need a day off to have time to get there before they close. I can give a seat of the pants dyno impression once I get the fuel problem fixed, get some good data from my wideband, and get a new tune.

 

[na svt]

Fixed it for you

Care to race that Taurus? I love the way my truck drives too, but for different reasons. I would bet that my little 346 rwhp Cobra is a much better driver than your 900rwhp twin. I heard a rumor you're selling it too. So, I spent "too much" to make a car I love, but not an impressive dyno sheet, and you spent so much that now you have to sell it. Which one of us made the smarter choiceoke: If the rumor is true anyway:beer:

Who stands to be out more money? I vote for the TT.