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Search found 2238 matches

by maxracesoftware
Wed Apr 22, 2020 11:55 pm
Forum: Engine Tech
Topic: Port length BBC heads
Replies: 6
Views: 497

Re: Port length BBC heads

Thank you lots of useful detail. So it's hard to compare the two on volume as like in velocity. These are from PipeMax / Larry Meaux Int=5.339 Exh=2.818 Int=135.6 Exh=71.58 GM #3890462 SBC out-the-box shape 1.940-1.500 Int=5.975 Exh=3.380 Int=151.8 Exh=85.85 GM 781 BBC cast-iron Good-Port in ported...
by maxracesoftware
Mon Mar 16, 2020 3:25 am
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 11313

Re: Engine Masters rod ratio test results

48 years :D my Marquette Distributor Machine ( purchased 1972 ) ... made my own Spark Plug load bar w/adjustable Plug Gaps what i did was experiment with 5 or so Distributors that would start missing at certain RPMs adjusted Plug Gaps until Distributor Machine should same RPM as Race Car or Dyno an...
by maxracesoftware
Fri Mar 13, 2020 4:31 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 11313

Re: Engine Masters rod ratio test results

Over 45 years of restoring (never merely repairing), recurving advance curves, removing bounce and jitter at high rpms, and indexing the proper firing interval between cylinders. Also graphing the advance curves so the distributor can be correctly installed in the engine. 48 years :D my Marquette D...
by maxracesoftware
Fri Mar 13, 2020 3:08 am
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 11313

Re: Engine Masters rod ratio test results

Over 45 years of restoring (never merely repairing), recurving advance curves, removing bounce and jitter at high rpms, and indexing the proper firing interval between cylinders. Also graphing the advance curves so the distributor can be correctly installed in the engine. 48 years :D my Marquette D...
by maxracesoftware
Tue Mar 10, 2020 12:58 pm
Forum: Engine Tech
Topic: Engine Masters rod ratio test results
Replies: 151
Views: 11313

Re: Engine Masters rod ratio test results

Stan Weiss wrote:
Mon Mar 09, 2020 12:35 am
Where are these dyno sheets at ?

If you have accurate dyno room weather data (BP, VP, TEMP), fuel lbs/hr and A/F ratio. SCFM can be calculated.

Stan
i'm likewise wondering :
Where are these dyno sheets at ???

anyone have a web Link to these Dyno Sheets ??
by maxracesoftware
Tue Feb 11, 2020 1:50 pm
Forum: Engine Tech
Topic: Current NHRA Pro-Stock Cyl. heads
Replies: 10
Views: 1570

Re: Current NHRA Pro-Stock Cyl. heads

Does anybody know pretty close as to what the flow numbers are on the current Pro-Stock heads ? Mark H. from PipeMax v4.50 : Bore=4.75000 Stroke=3.52000 499.01057710 Cubic Inches @ 10000 RPM Intake System= 124.66269 VE% Complete Intake System Flow @28in.= 600.0000 -to- 642.5146 CFM @ 1.200000 Lift ...
by maxracesoftware
Sun Feb 09, 2020 4:50 pm
Forum: Engine Tech
Topic: Why does a tighter lsa need more compression?
Replies: 140
Views: 6373

Re: Why does a tighter lsa need more compression?

"Cranking pressure" ? , but at what Starter RPM ?? Starter RPM can change Cranking pressure a lot , one way or the other !!! the various Tests i've made with Starter RPM on my Dyno prove this . Likewise , whats so special about Seat-to-Seat Duration in so called DCR ? Seat-to-Seat is still not start...
by maxracesoftware
Sat Feb 08, 2020 3:38 pm
Forum: Engine Tech
Topic: Why does a tighter lsa need more compression?
Replies: 140
Views: 6373

Re: Why does a tighter lsa need more compression?

There's nothing Dynamic about DCR, and it has no mathematical significance to what's going on in a running engine. DCR is based on the misconception that you need the intake valve to be closed, to start compressing the mass in the cylinder, and that's far from the truth. As long as the pressure abo...
by maxracesoftware
Wed Jan 22, 2020 12:19 pm
Forum: Engine Tech
Topic: Compression
Replies: 50
Views: 2599

Re: Compression

Ok I am lost trying to figure out the static on this new build...... 3.75 stroke 4.135 bore. I have at .375" down 75 cc the head gasket at .040" and the heads 46 cc. I measured down .375 because of the domes. Thanks I have a head ache finding it out I am figuring 17:1 but making sure so I can get a...
by maxracesoftware
Wed Jan 22, 2020 11:52 am
Forum: Engine Tech
Topic: PIPEMAX question for maxracesoftware
Replies: 4
Views: 566

Re: PIPEMAX question for maxracesoftware

I ordered the update software for Pipemax for 75$ off of maxracesoftware.com. When I ordered my version back in maybe 2005 or 2006?ish, It came in an email. How will this one come? AND......I was amember of your forum on maxracesoftware.com......but It wont let me sign in to what I believe is my lo...
by maxracesoftware
Sun Dec 08, 2019 1:17 pm
Forum: Chassis / Suspension / Body
Topic: 1320 Feet MPH Comparisons between V8, V6, S6, 4 Cylinders
Replies: 42
Views: 11677

Re: 1320 Feet MPH Comparisons between V8, V6, S6, 4 Cylinders

Looking good to me so far. Is there an input for torque converter stall rpm? Or maybe a suggested rpm range for it? not on the simple version [1] but what you're asking for , are on the hi-tech version [2] in my posts i just discovered a better , new method , that has greater prediction accuracy , ...
by maxracesoftware
Fri Dec 06, 2019 11:18 am
Forum: Chassis / Suspension / Body
Topic: 1320 Feet MPH Comparisons between V8, V6, S6, 4 Cylinders
Replies: 42
Views: 11677

Re: 1320 Feet MPH Comparisons between V8, V6, S6, 4 Cylinders

Nice! Is the C/ED dragster a rear engine dragster? :?: John , thanks for your interest in my Software !!! do you have any things you might want to see added to this Software ??? ... now's the time to ask :) There will be 2 versions of "ET Slip Data back into HP" ( reverse engineering ) [1]= this ve...
by maxracesoftware
Fri Dec 06, 2019 11:04 am
Forum: QUARTERjr Racing Software
Topic: QUARTERjr Bundle Deal, 52% off
Replies: 4
Views: 572

Re: QUARTERjr Bundle Deal, 52% off

I am interested in the bundle but do not see how to order? One question; do any of your programs use slick roll out measurements instead of slick diameter? go 2 Posts above your Post to order + download all 6 Apps https://www.speed-talk.com/forum/viewtopic.php?p=821029#p821029 in Quarter Pro App, y...
by maxracesoftware
Thu Dec 05, 2019 11:04 pm
Forum: Chassis / Suspension / Body
Topic: 1320 Feet MPH Comparisons between V8, V6, S6, 4 Cylinders
Replies: 42
Views: 11677

Re: 1320 Feet MPH Comparisons between V8, V6, S6, 4 Cylinders

John Wallace wrote:
Thu Dec 05, 2019 8:25 pm
Nice!

Is the C/ED dragster a rear engine dragster?

:?:
Yes, it was a Rear-engine Dragster

i guess i need to make more destinctions in the drop-down choices

there is already a Nostalgia Dragster choice , which is a Front-engine Dragster
by maxracesoftware
Thu Dec 05, 2019 2:41 pm
Forum: MaxRaceSoftware
Topic: first prototype ScreenShots of ET_Analyst Pro 2019-2020
Replies: 6
Views: 338

Re: first prototype ScreenShots of ET_Analyst Pro 2019-2020

NHRA Competition Eliminator year 1995 C/SR Roadster Simulation Run example :

Image


NHRA Jr. Dragster Simulation Run example :

Image