Well finally got car to chassis dyno. It did not go as well as I had hoped. I have the FAST EZ EFI on my motor its a multiport system but using the EZ computer.

My motor does not have enuff vaccum for this system to work properly. It uses a 1 BAR map and is showing 70-75 at idle. It uses a scale from 0-100 and 100 being no vaccum. So the computer thinks the motor is under load and is trying to add fuel. I moved the target rations way up in the 14.5 range at idle and part throttle and wide open at 13.5 to try and compensate for this but would still have AF readings all over the place.

I got to run about half azz and made a couple pulls.
It would start out lean then try and correct and end up rich at about 5500 RPM ending up in the 11.8-12.0 range at the end of the pull 6800

But the ONE good thing is this motor is making some steam even with a BAD tune.

It made 580HP at 6800RPM on 93 ocatne at 24* timing with a pair of 3" mufflers hangin on the end of the headers

By comparison My 422" W9 motor on the same dyno made 583HP at 7000RPM, and went a best of 9.63 @ 139MPH with a race weight at 3215.lbs

So I am going to have to get with Mopar Rich to find out where we go from here with the EFI


A quick rundown on the motor
426" its 11 to 1 compression
Modern Cylinder CNC heads
cam is .640 lift HYD roller
266 @.050 intake 271@.050 ex

Just cant beleive a motor with stainless valves non adjustable rockers and a Hydraulic roller cam can make that kinda power on pump gas

Oh and my car has a 727 and a Dana 60 rear he said around 25% correction factor so that would put it at about 725HP at the flywheel

Thanks "itsallgood" for all your help today

Man that some good numbers. Can't wait to see what it makes with a good tune. Why so little timing?

Dang, that is getting it done. Nice job! Good luck with getting it tuned.

Technology is amazing, good and bad sometimes though

Wow! I been waiting to hear what yours made and 580 at the rear tires is awesome and it sounds like you got plenty left.

Congrats Rick. Glad you have it up and going. Looks very promising and is going to be great with a better tune. Did your car loose some weight with the new engine?

Thanks for posting Rick. Interesting to see that it is keeping up with your W9 engine.
OH and you won't have to adjust your rockers Matt

Make that puppy run on 91 drop the rpm to 6500 and I THINK you just won the Engine Master challenge

Thanks Brian

It weighed 3215 with the R block W9 motor
the R block was 215lbs bare

I have not weighed the car yet with the 3G HEMI in it but I have heard the engine should be lighter than a stock 340 block but dono.

sounds great! keep us posted

Awesome power numbers! I wish i had of built a hemi

rick did a great job geting that 3g hemi all together. that 580 hp pull was on the rev limnter

WOW, that's more than I would have expected considering it's state of tune and hydraulic cam. That thing is going to be serious

Wow....I like that combo already. It does sound like you have a vacuum leak though..I would take a look and see if you do. Post your detailed engine spec's if you don't mind. I would like to start collecting parts to build one of that caliber.

how are you controlling timing? I thought the EZ was fuel only?

Sweet Rick! Nice job.

Good Job Rick

Rod

Did you dyno it with a carb? Nice numbers!!

NO Steff on the carb, I just have a lil bone stock 750 DP with choke on it.

The nice thing about dynos, you can find these things out before you hit the track, sounds impressive so far and I am sure you will sort it out and get it running right, you better, we got some racin' to do, besides I can't wait to see this thing in person.