Would someone explain to me an engine dummy why a supercharger on the 3-valve engine doesn't produce 400 plus to the wheels. What I understand from half *** reading this thread is that you produce 400 plus horsepower but you are losing it before it hits the rear wheels. Does this mean any other bolt on modification would be rather pointless? Electric water pump, pullys, long tube headers etc? Please answer maybe I should just start modifying my exterior looks with wheels etc before dumping more money into a machine that it wouldn't benefit.

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I’m going to have to look at the brands I’m not sure but their both from the same company. I will post when I get a chance to look.
Since most of you know I’m a aeronautical engineer which means designing and solving problems is what I like to do. The only real problem I have now is fords fly by wire for the throttle body.

This is what I’m working on. It’s a simple design a transmitter feeding a pulse signal to a motor with a potentiometer to control the position. It works great until it gets boost then the motor is not strong enough and will flutter which will throw the car into safe mode on the ECU. So I now have a good motor and have a machine shop milling the plate to mount to the throttle body. On the bench the stock motor put out 425in. oz of torque to the shaft and the motor I have put out 1600in oz torque to the shaft. One thing I did have to change it the fuse I went to a 20 amp so it wouldn’t blow. Should have the part on the car next week and if all goes well will tell you what to by and where and post a copy of my CNC drawings so you can make one yourself. Another thing on the pulse singnal I found if you make a small circuit and double it the delay you see goes away. All it amounts to it doubling the electric motors input signal by 2.

On the rod question and HP I really don’t know. I have also read and heard of guys making 500 plus on the stock setup but what I’m posting is what happened to me. 400 –430 and two rods failed. I’m also told and believe the block will only take 600 then crack.
This is RWHP from an auto so its flywheel would be close to 700hp if it was making 600rwhp. For what its worth.

The Procharger question is you only start with close to 260-270hp to the wheels so it would take at least 16lbs of boost 55lb injectors 255 fuel pump and boost a pump and then open up the exhaust all the way back to break 400hp IMHO. I know Vortech and Procharger advertise 400-450 but on the dyno its all BS. Vortech told me when we were building the engine and hit 450 rwhp and I was disappointed that that was one of the highest they had ever heard of. Personally I think it would take $6,000.00 minimum and then hope a rod doesn't look like the one pictured. I would build the car from the bottom up to make sure you don't explode.

Hope some of this helps.

John

 

are you talking dynojet numbers or mustang dyno numbers? could be the difference of why people are second guessing the limits here?

 

Nice car! Great attention to detail on that beast. I wonder how fast and how well the Vette's would handle with that much in cash mods?

 

Not sure the question? Its my mustang on a dynojet. I know you can hash dyno's all day long but I found 3 pro shops and out of them this one has 2 owners that flat have cash to burn so when they screw up they pay the bill. Give you an idea they have a GT 40 in there right now they are stroking and building custom parts for that put down 575rwhp but it is a stick and they treat it like its nothing. Its just a test platform to them. Its their car.

I just think a lot of numbers posted and said never hit a dyno and if they did the guys would go home upset. I have two fiends that have vettes and vortechs on them with a tons of mods. I turned 41 Friday so we all went out to rip around a little and the Mustang will flat walk away from these guys and its killing them. One guy is heading to FC on Monday to see what they can do to get more HP. Gotta love that!

John

 

Mustang dynos is a brand...they take into consideration loading (real world) factors and typically produce a lower horsepower number than dynojet dynos.

maybe thats the reason you got two blown engines...they dont care so they go beyond the known limits and pay for it...J/K

i'd love to see their profit/loss sheets...haha

 

I started encountering the same thing when I reached over 550 on the vette, so I imagine this is just a result of having so much power (and not enough traction) and not a function of the chassis, etc.
I started out with big pulleys on my SC and I'm gradually working down in size and correcting problems I find as I step up in power (fuel, injector size, etc.) as we go along. When we jumped from 550 (4 lbs) to 590 RWHP (5.5 lbs) on my vette it started to get sideways in secon d and even third. I put on 345 drag radials on 13 wide wheels at the rear. They made a big difference in both traction and control - ending the type sliding sideways you're talking about. Now up to 640 (7.25 lbs) and they still do okay. I don't know about tire clearances on the Mustang but I had to tub the rear wheel wells to fit these tires, total cost was about $1500, but it was worth it for the added traction and control: power's really not worth much unless you can put it to the ground and control it.

 

+1

 

WOW. I don't understand half of this, but it is very educational. You guys are awesome. Good luck to you and your goals!

 

Are you dominating the vette's in the quarter mile and on the road courses? How do you fare against them in the corners?