SrtBrad
Michel Productions
Update?
Jerry will post an update soon. the 91 octane pull was done but the race tune will be done another day.
Update?
Dynojet? That's a ton of driveline losses
Dynojet? That's a ton of driveline losses
Ahh, so it could have another 20 or more in it on the street tune then.Yes, Dynojet. During the pull after the 680 rwhp run, still slightly rich on the high end, one of the plug wires burnt through on the header and was severely arcing and power was lost. Tried to tape up the wire but no luck. A&C will have to pull the intake on Monday and they will replace all 10 wires. I will bring the truck back to Bakersfield on either Tuesday or wed. Chris will come to Bakersfield, and we will use the Dynojet at Cal Speed to finish the tune and then load the MS109 fuel and do the race tune. I think we will dyno with the heavy street tires to be consistent , get the final number and then switch the heavy street tires for the 16" Bogarts with the M&H Cheater slicks and see the difference in horsepower (90lbs each, street wheel &tire vs 43 lbs.)
almost a 200 h.p. loss???
but its an incomplete dyno run:dontknow:
No, I think Chris was at about the limit on 91 octane. Remember the engine is 11.5:1 compression and Chris heard a little knock sensor at the very end of the run. I think we will keep the street tune at about the 675 rwhp level. My street tires couldn't handle the 485 rwhp of the stock engine. I may have to run around on some M&H 390 drag radials on the street.:burnout:Ahh, so it could have another 20 or more in it on the street tune then.
Actually about 178 hp loss. (862-680), about a 21% loss, although there were several changes, altitude, injectors (42 lb vs 60 lb) , fuel pressure. At Exotic they ran extremely high fuel pressure (not practical for the street) to feed the smaller stock Gen IV injectors. The truck idles at 750 rpm, Peak horsepower is at about 6,400 rpm, peak torque is at 5,000 rpm. Couple of dyno runs were to 6,800-6,900 rpm. Todd at A&C was thinking there is close to a 25% loss in the trucks vs the cars because of the heavy wheels and larger ring and pinion in the Dana. So everyone is guessing between 18-21% loss. 21% = 680 divided by .79= 860 flywheel. 680 divided by .82= 829 flywheel. Still this is a pretty impressive street machine. If we get to 700+ rwhp on the 109 tune we are looking at close to 900 flywheel HP in a street NA machine.....I think that's cool!:rock: Its making over 500 wheel torque from 2500 rpm and still making over 600 above 5500 rpm.
As we all know... H.P. is TORQUE multiplied. This is where it's at...
"Its making over 500 wheel torque from 2500 rpm and still making over 600 above 5500 rpm"
This is an impressive swath of cylinder pressure on 91 pump with an N.A. two valve head. :rock:
Jerry, can you share the peak TQ # at 5K?
Cheers!
How come?Awesome numbers, especially the average torque. It will lose dramatically with the Cheater slicks from my experience, just FYI. Doms was almost 200whp down with m+h 390s over the 22's on the old setup.