you might want to spend a few bucks and play with one or more of these software programs as they can teach you a good deal.
If you take the time to read carefully, and take a couple dozen posted dyno results , read up on the parts used and carefully research data like compression,flow numbers cam duration,etc.
if you use VALID data and correctly fill the blanks
the PEAK torque and hp numbers,
the soft ware predicts are frequently with-in 5%-7% of what the engine actually produces.
but, as always the rule still applies garbage data in=garbage data out
to get fairly competent at using dyno software ID strongly suggest you take the effort to..
find a dozen old,posted engine dyno print-outs that come with the details on the parts used listed,in the engine build. you then fill in the data on your software program and get the predicted results, youll generally find you need to go back and verify data and only once you get a good feel for the process and find out that theres frequently data you either forgot to ask or inclued or you ignored that will effect the results.
now working with the known existing dyno results, and then finding the software prediction may not always match might seem to be backwards, but its going to have a very valid result in that it forces you to ask questions and look for answers you otherwise might never think about,that do effect the predicted software results.
yes once your familiar with what data actually matters and how critical it is to enter valid info youll see a distinct patern emerge and you learn that you can't assume data
Programs like that are great for getting an idea of how small changes will affect an engines performance, but do not place much stock in them as to real world dyno numbers as there are far too many un known variables where they assume things that might not be true in your case,. They make for a great tool to cross check changes on the computer though. If you are looking for some basic information on how changing LSA compression ratios or carb size or head flow, or to verify likely results from a cam advance, or swapping cams etc.. and potentially how those proposed changes may alter your potential power curve and have realistic cylinder head flow numbers to input into the software, they can be a useful tool.
if you have a time slip from the local track and
know your cars weight with you in it,
you can get an idea of your cars
REAR WHEEL HP,
your flywheel hp
(which is what the virtual dyno software predicts)
will generally be 17%-20% higher, so subtract that from the hp used in the weight/hp et prediction calculators to get semi valid answers
http://www.wallaceracing.com/et-hp-mph.php
http://www.ajdesigner.com/fl_horsepower_trap_speed/horsepower_trap_speed.php
http://maxracesoftwares.com/softwareproducts.htm
http://www.ajdesigner.com/fl_horsepower_trap_speed/horsepower_trap_speed.php
http://www.dragtimes.com/horsepower-et-trap-speed-calculator.php
http://garage.grumpysperformance.co...k-top-dyno-as-a-tuning-tool.10939/#post-48072
KEEP IN MIND SOFTWARE DYNO RESULTS PREDICT FLYWHEEL HP
< NOT REAR WHEEL HP THAT WILL GENERALLY BE
17%-20% lower with the drive train losses
http://www.badasscars.com/index.cfm...duct_id=64/category_id=13/mode=prod/prd64.htm
http://www.wallaceracing.com/Calculators.htm
http://www.virtualengine2000.com/calculator.htm
http://horsepowercalculators.net/the-horsepower-calculator/virtual-engine-dyno
http://www.campbellenterprises.com/Race math calculators.htm
http://www.virtualdyno.net/
http://www.auto-ware.com/software/eap/eap.htm
you want details and input data, well heres what you want, (above) its a P.I.T.A, to enter all the requested info but the results are detailed
http://www.virtualengine2000.com/
http://www.autorepairmanuals.biz/site/5 ... uct/186011
http://performancetrends.com/ea-PLUS.htm
http://www.speedtalk.com/v-dyno-racing-software.html
http://www.compcams.com/downloads/register.asp
http://www.camquest.com/
http://quarterjr.com/
http://www.motionsoftware.com/
http://www.compcams.com/Camquest/
http://www.auto-ware.com/software/eap/eap.htm
http://performancetrends.com/Engine_Log_Book_v1.htm
http://speedtalk.com/reher_morrison_books.html
BTW PROGRAMS LIKE DD2000 is fun to play with but its hardly exact., if you want more reliable answers you need more exact data and a better program, but calculations get far more complicated and your going to need far more exact info fed in to get better answers
here if you want more precise guess work from software
http://www.auto-ware.com/software/eap/eap.htm
BUT YOULL HAVE ABOUT 7 SCREENS OF DATA TO FILL IN CORRECTLY
If you take the time to read carefully, and take a couple dozen posted dyno results , read up on the parts used and carefully research data like compression,flow numbers cam duration,etc.
if you use VALID data and correctly fill the blanks
the PEAK torque and hp numbers,
the soft ware predicts are frequently with-in 5%-7% of what the engine actually produces.
but, as always the rule still applies garbage data in=garbage data out
to get fairly competent at using dyno software ID strongly suggest you take the effort to..
find a dozen old,posted engine dyno print-outs that come with the details on the parts used listed,in the engine build. you then fill in the data on your software program and get the predicted results, youll generally find you need to go back and verify data and only once you get a good feel for the process and find out that theres frequently data you either forgot to ask or inclued or you ignored that will effect the results.
now working with the known existing dyno results, and then finding the software prediction may not always match might seem to be backwards, but its going to have a very valid result in that it forces you to ask questions and look for answers you otherwise might never think about,that do effect the predicted software results.
yes once your familiar with what data actually matters and how critical it is to enter valid info youll see a distinct patern emerge and you learn that you can't assume data
Programs like that are great for getting an idea of how small changes will affect an engines performance, but do not place much stock in them as to real world dyno numbers as there are far too many un known variables where they assume things that might not be true in your case,. They make for a great tool to cross check changes on the computer though. If you are looking for some basic information on how changing LSA compression ratios or carb size or head flow, or to verify likely results from a cam advance, or swapping cams etc.. and potentially how those proposed changes may alter your potential power curve and have realistic cylinder head flow numbers to input into the software, they can be a useful tool.
if you have a time slip from the local track and
know your cars weight with you in it,
you can get an idea of your cars
REAR WHEEL HP,
your flywheel hp
(which is what the virtual dyno software predicts)
will generally be 17%-20% higher, so subtract that from the hp used in the weight/hp et prediction calculators to get semi valid answers
http://www.wallaceracing.com/et-hp-mph.php
http://www.ajdesigner.com/fl_horsepower_trap_speed/horsepower_trap_speed.php
http://maxracesoftwares.com/softwareproducts.htm
http://www.ajdesigner.com/fl_horsepower_trap_speed/horsepower_trap_speed.php
http://www.dragtimes.com/horsepower-et-trap-speed-calculator.php
http://garage.grumpysperformance.co...k-top-dyno-as-a-tuning-tool.10939/#post-48072
KEEP IN MIND SOFTWARE DYNO RESULTS PREDICT FLYWHEEL HP
< NOT REAR WHEEL HP THAT WILL GENERALLY BE
17%-20% lower with the drive train losses
http://www.badasscars.com/index.cfm...duct_id=64/category_id=13/mode=prod/prd64.htm
http://www.wallaceracing.com/Calculators.htm
http://www.virtualengine2000.com/calculator.htm
http://horsepowercalculators.net/the-horsepower-calculator/virtual-engine-dyno
http://www.campbellenterprises.com/Race math calculators.htm
http://www.virtualdyno.net/
http://www.auto-ware.com/software/eap/eap.htm
you want details and input data, well heres what you want, (above) its a P.I.T.A, to enter all the requested info but the results are detailed
http://www.virtualengine2000.com/
http://www.autorepairmanuals.biz/site/5 ... uct/186011
http://performancetrends.com/ea-PLUS.htm
http://www.speedtalk.com/v-dyno-racing-software.html
http://www.compcams.com/downloads/register.asp
http://www.camquest.com/
http://quarterjr.com/
http://www.motionsoftware.com/
http://www.compcams.com/Camquest/
http://www.auto-ware.com/software/eap/eap.htm
http://performancetrends.com/Engine_Log_Book_v1.htm
http://speedtalk.com/reher_morrison_books.html
BTW PROGRAMS LIKE DD2000 is fun to play with but its hardly exact., if you want more reliable answers you need more exact data and a better program, but calculations get far more complicated and your going to need far more exact info fed in to get better answers
here if you want more precise guess work from software
http://www.auto-ware.com/software/eap/eap.htm
BUT YOULL HAVE ABOUT 7 SCREENS OF DATA TO FILL IN CORRECTLY
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