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11-24-2006, 10:59 AM
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#1
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Join Date: Nov 2005
Location: Edison
Posts: 7,856
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whos got desktop dyno?
I need some help
I want to see the difference between a 400sbc with l31 vortec heads(stock flow numbers) a edelbrock performer rpm intake, holley 750cfm carb
and one with xe284 and one with xe262
thanks
matt
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1984 Firebird
2000 Z28
2023 Tacoma
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11-24-2006, 11:17 AM
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#2
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Here ya go:
XE 262:
XE 284:
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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11-24-2006, 11:18 AM
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#3
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MIR
Join Date: Jul 2005
Posts: 9,692
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11-24-2006, 10:59 PM
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#4
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Join Date: Nov 2005
Location: Edison
Posts: 7,856
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why does the xe262 make so much more tq?
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1984 Firebird
2000 Z28
2023 Tacoma
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11-25-2006, 06:48 PM
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#5
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NJFBOA Co-Founder
Join Date: Jul 2004
Location: All up in your kool aid!
Posts: 12,235
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lower lift using the same draw volume = higher intake velocities. that helps to create torque.
the peak number with the smaller cam does look better, but it is falling off hard from 3000 on. when you look at dyno or simulation curves, ignore peak numbers. they are very misleading and don't account for where the useful power band it or how the car will be able to use the power.
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11-25-2006, 07:26 PM
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#6
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,170
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Quote:
Originally Posted by NJSPEEDER
...ignore peak numbers...
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Now where is the fun in that?
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The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
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11-25-2006, 08:28 PM
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#7
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NJFBOA Co-Founder
Join Date: Jul 2004
Location: All up in your kool aid!
Posts: 12,235
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dyno's and peak numbers are fun to brag about to your import owning friends, but somewhat useless for basing the actual performance of a car. so in high school they may actually be of some use to wayfast. lol
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11-25-2006, 08:42 PM
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#8
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Join Date: Nov 2005
Location: Edison
Posts: 7,856
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i guess neither cam is good for this then.. huh?
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1984 Firebird
2000 Z28
2023 Tacoma
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11-25-2006, 09:10 PM
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#9
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Join Date: Aug 2004
Location: Somerset County
Posts: 5,559
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methinks that first engine combo would be awesome for a truck...400+ lb-ft of torque from idle to 4000+ rpms
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1999 Corvette FRC
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11-25-2006, 09:13 PM
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#10
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American Road Warrior
Join Date: Jul 2005
Location: Wastelands of NJ
Posts: 6,116
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What would the power level be with NAWZ? 
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THE ONLY THING THAT SUCKS WORSE THEN IMPORTS ARE RICED OUT IMPORTS!!!
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11-26-2006, 12:03 PM
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#11
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NJFBOA Co-Founder
Join Date: Jul 2004
Location: All up in your kool aid!
Posts: 12,235
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Quote:
Originally Posted by WayFast84
i guess neither cam is good for this then.. huh?
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you are basing these simulations on stock flow numbers. you said you were going to get them ported. if you are leaving them stock you shoudl look into an XE274 or similar cam, that would be better for stock. the factory ports aren't going to flow nearly enough to take proper advntage of what the XE284 has to offer.
justin, if you care to run the simulation again using a 10% increase in the flow numbers you can show wayfast a better picture of how the cam will react with properly prepped heads.
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11-26-2006, 03:44 PM
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#12
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Here's the xe284 with the same specs as above and a 10% increase in head flow numbers (intake and exhaust sides):
There are some nice gains above 3000 RPM from the head porting....
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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