GREAT NASCAR V-8 dyno video

General engine tech -- Drag Racing to Circle Track

Moderator: Team

swampbuggy
Expert
Expert
Posts: 847
Joined: Mon Apr 04, 2011 8:54 pm
Location: central Florida

GREAT NASCAR V-8 dyno video

Post by swampbuggy » Sat Sep 15, 2018 1:56 pm

Thought you folks who have not seen this video might enjoy it, notice the headers getting red/orange. Mark H


https://youtu.be/EScO0-NHGs0

JoePorting
Guru
Guru
Posts: 2627
Joined: Mon Jun 14, 2010 3:16 pm
Location: Lake Elizabeth, CA

Re: GREAT NASCAR V-8 dyno video

Post by JoePorting » Sat Sep 15, 2018 2:16 pm

That is one big water pump pulley.
Joe Facciano

Roundybout
Member
Member
Posts: 147
Joined: Tue Dec 29, 2015 8:09 pm
Location: NH

Re: GREAT NASCAR V-8 dyno video

Post by Roundybout » Sat Sep 15, 2018 2:43 pm

What were those green bar graphs on the bottom right, individual real time AFR meters? Interesting how much they moved around. I'm always very interested in seeing what they're monitoring.

cardo0
New Member
New Member
Posts: 44
Joined: Fri Mar 30, 2018 9:36 pm

Re: GREAT NASCAR V-8 dyno video

Post by cardo0 » Sat Sep 15, 2018 3:47 pm

Yeah, it looked more like a peep show. Funny they monitor A/F but not EGT. I did notice they monitor oil pan evacuation and blow-by.

swampbuggy
Expert
Expert
Posts: 847
Joined: Mon Apr 04, 2011 8:54 pm
Location: central Florida

Re: GREAT NASCAR V-8 dyno video

Post by swampbuggy » Sat Sep 15, 2018 5:32 pm

I noticed the pulley set up for the alternator.....man that alternator has to be spinning FAST. Mark H.

tjs44
Pro
Pro
Posts: 486
Joined: Thu Jul 07, 2005 2:30 pm
Location: long beach.ca

Re: GREAT NASCAR V-8 dyno video

Post by tjs44 » Sat Sep 15, 2018 6:06 pm

I was at TRD last year and watched them run a lap on the Sanoma road track.Very cool how they load and unload it for the turns.Tom

User avatar
MadBill
Guru
Guru
Posts: 13716
Joined: Tue Nov 15, 2005 10:41 am
Location: The Great White North

Re: GREAT NASCAR V-8 dyno video

Post by MadBill » Sat Sep 15, 2018 6:23 pm

swampbuggy wrote:
Sat Sep 15, 2018 5:32 pm
I noticed the pulley set up for the alternator.....man that alternator has to be spinning FAST. Mark H.
It's the diameter difference between the alternator and crank pulleys that determines its RPM.
Felix, qui potuit rerum cognscere causas.

Happy is he who can discover the cause of things.

User avatar
Stan Weiss
Guru
Guru
Posts: 3709
Joined: Tue Feb 20, 2007 1:31 pm
Location: Philadelphia, PA

Re: GREAT NASCAR V-8 dyno video

Post by Stan Weiss » Sat Sep 15, 2018 6:31 pm

Interesting. Based on the SAE correction factor it looks like they use J1349. Is that what most are using now?

Stan
Stan Weiss / World Wide Enterprises
Offering Performance Software Since 1987
Do you use engine simulation software that uses cylinder head flow files?
We have a package of more than 3000 DFW or FLW Files

pamotorman
Guru
Guru
Posts: 2741
Joined: Thu Mar 06, 2014 11:55 pm

Re: GREAT NASCAR V-8 dyno video

Post by pamotorman » Sat Sep 15, 2018 7:49 pm

did Toyota copy the dodge engine since they were getting out of NASCAR. since ford and chevy were staying I can not see them allowing Toyota to copy their engines

swampbuggy
Expert
Expert
Posts: 847
Joined: Mon Apr 04, 2011 8:54 pm
Location: central Florida

Re: GREAT NASCAR V-8 dyno video

Post by swampbuggy » Sat Sep 15, 2018 8:37 pm

Pamotorman...there is not very much difference in Chevy, Ford, Toyota, or Dodge as far as the parts that actually make the horsepower is there ??
Madbill...I see that the water pump is under driven (typical) BUT still....that alternator must be turning faster than normal stuff (detroit). Mark H. :)

User avatar
MadBill
Guru
Guru
Posts: 13716
Joined: Tue Nov 15, 2005 10:41 am
Location: The Great White North

Re: GREAT NASCAR V-8 dyno video

Post by MadBill » Sat Sep 15, 2018 8:52 pm

You're right; it looks like about 2:1, so close to 20,000 RPM max. Seems like way more than needed and well beyond the safe upper limit for most units. :-k
Felix, qui potuit rerum cognscere causas.

Happy is he who can discover the cause of things.

Charliesauto
Member
Member
Posts: 130
Joined: Wed Sep 03, 2014 2:01 am

Re: GREAT NASCAR V-8 dyno video

Post by Charliesauto » Sat Sep 15, 2018 9:01 pm

swampbuggy wrote:
Sat Sep 15, 2018 5:32 pm
I noticed the pulley set up for the alternator.....man that alternator has to be spinning FAST. Mark H.
That's a high end Bosch alternator, dual cooling fans, lots of ventilation in the housing. Bosch recommends the pulley sizing should achieve 20,000 alternator shaft rpm at max engine rpm. They actually last longer turning this rpm because they run cooler.
These alternators are around $2,500 ea.

Warp Speed
Guru
Guru
Posts: 2693
Joined: Wed Jun 25, 2008 1:46 pm
Location: NC

Re: GREAT NASCAR V-8 dyno video

Post by Warp Speed » Sun Sep 16, 2018 8:36 am

The inertia dyno.......
Bald guy with glasses appears to be Reggie Hart?
Former Hendrick and DEI guy.

GRTfast
Guru
Guru
Posts: 1366
Joined: Wed Jul 05, 2017 8:26 am

Re: GREAT NASCAR V-8 dyno video

Post by GRTfast » Sun Sep 16, 2018 9:28 am

Man that thing screams.

swampbuggy
Expert
Expert
Posts: 847
Joined: Mon Apr 04, 2011 8:54 pm
Location: central Florida

Re: GREAT NASCAR V-8 dyno video

Post by swampbuggy » Sun Sep 16, 2018 10:29 pm

Warpspeed, is that similar to a pull you guys would do at HMS ? What i am wondering mostly IS, would the pull be that slow and long ??? Also, is that way of pulling an engine typical of an inertia dyno ??? Thanks Mark H.

Post Reply