In this, episode 154 of PowerTec 10, DV lays the ground rules for an all out porting job on AFR’s Enforcer heads. Since these budget heads are very good to start with upgrading them is going to need some hi-tech porting know-how – which is just what DV delivers.
He also brings up the latest DV Vs Eric Weingartner deal which started as a major conflict between these two head experts. Here you will find there has been a very much unexpected turn of events.
To get a better handle on the latest turn of events it is HIGHLY recommended that you watch the Weingartner Racing Video on this link:-
Here are some more video’s by Weingartner Racing which might just convince you to subscribe to Eric’s channel.
Use a dial indicator and test that grinder chuck, burr shaft, and head runout.
Look for the scrap barrel.
Maybe send them free to Eric!
Mike
Does every video need to be a blow-by-blow of your resume? It's to the point that I have to unsubscribe. What a bore!
So what do you think killed the swirl? Was it the scavenging plateau?
Big props for being the first to respond to EW and put it on the line for the cam challenge
So how many camshafts are you going to send Eric to test regarding the bet that he is doing?
I said my money is on you not brian tooley on EW's channel. Brian replied that I was going to owe him money if you entered. Whoever comes out on top, everybody wins.
I know you usually dont work on diesels but We have a turbo diesel pulling tractor and it makes really good power and the torque is double what the hp is. We are currently the points champion for this year and we were also last year but the only thing I would like to do is bring up the rpm that the motor makes maximum hp at. The power curve is real flat but it makes peak power at 3,000 rpm. What do we need to do to the cam to bring the max hp rpm up. Do we need more duration or do we need to open up the LSA?
David and all my years of being in an amateur engine builder I’ve only seen a few people that I can really explain it really well and you’re one of them thank you
Eric has a terrible attitude and awful customer service try calling him and asking him about having some heads ported he is a complete jerk on the phone.
Great video David! I like the mix of hands on follow with the IOP analysis. Much appreciated
I grew up "Hot Rodding" in the late 1970's & beyond….All my friend's have David Vizard books in their libraries….You realy opened my horizons….I have the Grumpy Jenkins book, Waddell Wilson's book and various S&A Designs books on hot rodding motors but, your books are exceptional in their materials and sharing your thoughts on subjects.
hi, is AFR usin CFD to design their valves angles/ widths etc?
Thanks DV! v/r wh
Glad my comment started the war. A lot of good has come out and Eric has learned that he made an uninformed comment. I know who you are and of the work you have done. Hopefully erics ego will let him realize that some of what he does is build upon what you and many others have contributed to before he was even born. Good stuff. Eric is a no nonsense good hearted guy so we can give him a pass. He trying to make it right but his ego gets in his way sometimes. Lets all learn together, and compete only when nessary. Good stuff
I noticed the lower rpm of dyno test results will start at 4000 rpm for erics cam challenge.wouldnt 3000 be a more challenging test? The 4000 limit would seem to me favor cam with narrow power band with peak at top rpm versus cam with more careful choice of overlap,lsa, etc that might be a few hp down at very top but much better between 3000 and 4000.
What throws me is why he dont just buy a dyno so he doesn't have to go elsewhere to pay someone else, as well as many other engine builders. They're not that expensive, well they are but if you're dyno testing that much pays for one in a short amount of time ????
isn't the "swirl wing" in the intake port on the wrong side for good swirl?