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I'm not saying that a smaller carb can't make a lower ET at the dragstrip but for me the test at the dragstrip they used to confirm this was not conclusive proof. There may be better test out there to use as evidence. The article is written in a way to make you believe that the reason the car...

What is the data acquisition system you are using? Thank you.

If you do your own tuning then you know the challenges and frustration that come with tuning. You also know how rewarding it can be too. Some days i have to ask myself why.

No. That's probably close to the idle speed depending on the rest of the combination. Dyno sweeps are done at full load wide open throttle. I don't think this engine would be used under those conditions at that rpm. I will use the dyno to tune the strongest stable idle I can. I can load the...

Absolutely. These type of motors can be very challenging. Especially if it is an automatic car. Most customers want a car that will idle on it's own without stalling. They don't want it to stall when they put it in gear. They don't want it to fall on it's face, hesitate or back fire as they...

That might be what is most important to you when dyno testing and much of the time that is what my customer wants . But that isn't always the case for me or my customers at the dyno. As an example sometimes trading a few hp at the maximum in order to increase power somewhere else is beneficial...

I can only speak for my dyno as far as accuracy at low rpm. It can measure accurately but if the engine has a " big cam" the engine might not run well at low rpm and if the the engine doesn't run well it might not repeat well. Not having repeatability makes it difficult to evaluate changes...

I can't speak for the dyno shows but it could be a matter of what they think the veiwers want to see and having to choose what to put in and what to leave out.

Why do you think the dyno can't load properly and measure accurately at low rpm?

If your point is that a smaller a carburetor (650) is making more power than a larger carburetor (750) then shouldn't the two carburetors at least be prepared similarly and by the same builder to eliminate all the variables that could affect the power that are not cfm related? I'm not picking...

What head or heads have you tested this on? As far as combustion chamber shape or specific head, piston shape (dome?) compression ratio and how much piston to quench pad clearance. Also how and where did you soften the chamber? What timing number and at what rpm did you end up with? Do you have...

Truly amazing. I should say I didn't mean to Imply that your brother was rich, a young kid or that he doesn't work on his car. The character In my post was one I chose because it would be how the guy with the new car might be perceived by "old school guy". My feelings are more... Rich Guy =...

I just looked up Challenger 1320. Very impressive. And 20+ MPG on the highway. When you consider all the boxes this car checks as daily transportation it's performance on the race track is even more impressive. And naturally aspirated. I see why it rubs old school racers the wrong way. They...

While your there, can you snap a couple pictures of the dyno?

How many rpms does he turn that motor?

What kind of analog blow by meter did they get?

After your back heals up, try it without the check weight. Or because it can be difficult to get the weght out, loosen the nozzel screw a couple turns. I had a nozzle that wouldn't squirt and ended up grinding a little off the bottom of the screw. Some require a hollow screw also. Good luck.

Hey Noah, can you give more details on the timing before you fixed the curve and after you fixed the curve?

He can use the hydraulic. The spring in the lifter is way stronger than the spring in the dial indicator.

You can check your cam with the motor in the car. You don't need a degree wheel. You can use your balancer. You will need a piston stop, stagger tape and a dial indicator with a magnetic base. You need to remove all the spark plugs and the driver side rocker shaft. Assuming it is a hydraulic...

You're sort of making the assumption that fuel is already distributed evenly without the plate. In some applications where the fuel is not distributed evenly (as is often the case in a dual plane manifold) there is the outside chance that the plate could actually improve fuel distribution. When...

Also cylinders and rings. If you have time go to the Foggit web site and look at some of the videos explaining the benefits of fogging an engine. Some of the information will apply to other brands of fogging oil also. Foggit Press Coverage | Learn About Our High-Performance Fogging Oil

Foggit Fogging Oil | Ultimate High - Performance Engine Protection

Sorry, you gave your response while I was typing or I wouldn't have posted.

I might have missed it but I don't recall seeing any information to support this. Please point me to it if I am mistaken. Sorry for doubting you if that is the case. Airplanes have to take off and land so the fuel must perform at all elevations. Not just high in the air. Not all airplanes are...

Which driven oil are you using? XP doesn't have a rust inhibitor additive in it. I would change to an oil that does have a rust inhibitor for storage over the winter. Don't quote me but I think the driven HR series and the driven GP oils have the necessary additives for storage. I also...

As far as timing is concerned, have you reached the point where the motor is losing power anywhere in the curve yet from too much?

I agree with most of what you're saying. I can't speak for all dynos but in my case hardly anyone comes for a bragging rights dyno sheet. Around here people are pretty tight lipped about their motor program. I'm curious, how do you view a chassis dyno?

I always start with dyno headers. I match the dyno header to the customers as close as possible. The dyno headers have Egt probes and o2 sensors in them. At some point, usually after everything is dialed in close I will switch to the customers headers. I loose my egt data but most cases it's not...

I have run into that before. Sometimes they just want it broke in and don't even want a dyno sheet. They just want to know that the motor is ok and not leaking oil. Not how I would do it but for them it might make sense. Some customers don't know how to properly set timing, adjust valves or...