So my partner and I have come to a little bit of a disagreement. He is generally the one to go to on topics of maths and physics but I am quite sure I got him on this one.
We are creating a dome form using a bladder shaped much like the red container in the image. It has a cylinder section...
In another thread we are discussing ideal materials for exhaust systems and in that thread tubing thickness came up but a lot of responses are saying that in regards to thermal fatigue cracking thinner tubing would be better. This seems backwards to me but I want more information and I thought...
If you listen to aftermarket car talk there is a ton of back and forth and many opinions on what materials are best for automotive exhaust systems. Once you get past the downpipe you can get away with just about anything. Some have even done aluminum with surprising success.
But at the manifold...
The 4AGE engine uses an 8 bolt crank and flywheel because it is the performance engine and in later years came supercharged.
The economy engines use a 6 bolt crank and flywheel. The 7AFE 6 bolt crank however is used as a stroker crank for performance builds.
Many people use 2, 3, or 6 dowels...
Does anyone know of any good articles, studies or threads discussing main/rod bearing diameter and friction?
And or is there a formula to ballpark the friction related to RPM?
The next part of the question is around other variables. For example I'm thinking that if you had two rotating...
I started a thread in the Automotive section and got some good input but nothing that helps much in choosing an ideal alloy and hardness for this application.
http://www.eng-tips.com/viewthread.cfm?qid=402820
Details are in that thread but I am looking into making an upgraded oil pump gerotor...
I guess while I'm here I'll throw up another idea that's been on my mind. Pendulum style harmonic dampers.
http://www.dragzine.com/tech-stories/engine/tcis-rattler-balancer-tech-review/
There are a lot of solid crank pulleys out there. Often used to reduce weight. There is also a lot of good...
I am talking to a company in China that makes oil pumps for the motors I specialize in. I am still feeling out the idea of using their products and got a handful to inspect and test so we will see how that goes.
One of the main things that interested me would be getting them made with high...
I have spent most of my mental resources over the past decade focusing on how to get power out of motors. I am realizing that not only has my suspension knowledge not grown, I have actually forgotten a lot of what I did know.
I would love suggestions on suspension tuning books. Especially...
It seems to be pretty common terminology to call an AFM a MAF especially in the automotive world. It's my understanding that on it's own there is no way for an AFM to calculate mass airflow.
An AFM could be used with other components like a temp sensor and MAP sensor to calculate mass airflow...
Most any engine builder assumes that the cold valve clearance is what operating valve clearance will be.
I believe that under more extreme situations, possibly max load or maybe even max closed loop load that it's quite possible for valve clearances to be very close to zero.
My theory is that...
I spend a lot of time in the automotive community and a lot of time on car forums and groups.
Ever since I started to learn the actual relationship of torque and power it drove me crazy how few others in the automotive world actually understood this basic formula. People capable of building...
Many highly respected engine builder/tuners will tell you that you need to increase spring pressure for high boost. There are even reports of fixing floating valves related to boost (However they determined that IDK) or performance issues by going to a stronger valve spring.
Now I don't...
I never looked much into the technical details of high performance automotive 0-ring heads. I always assumed that some of them must actually use rubber o-rings.
In recent research it doesn't appear to be the case. All the documentation and discussion on it seems to be around metal o-rings...
I specialize in performance parts and tuning for the Toyota 4A-GE. I would like to come up with a kit that will maximize fuel economy while bringing performance up to a more modern level.
Here are the technical specs on the various 4A generations...
I am confused about whether or not Inventor LT has any sheet metal or part flatten capability. In most the documentation they don't say anything about it however in their knowledge base they have info listed directly under LT on using the sheet metal capabilities. I have downloaded the demo...
I own a small business that focuses mostly on aftermarket auto parts and custom fabrication.
I started out using Solidworks. When I started my own business I started using freecad hoping it would grow with my needs. Unfortunately it wasn't able to grow fast enough or meet a number of my needs...
After growing intimately familiar with compressor maps, turbine maps, ECU and other types of maps and graphs I figured BSFC maps would be pretty easy to wrap my head around. I thought I had a pretty good idea of how it all tied together but recently someone made a comment about BSFC that didn't...
I am starting to do more piston design and I would like an easy way to calculate minimum safe valve relief depth for a given cam.
Does anyone know of a program, or calculator designed for this purpose?
Many of my customers run 4AGZE engines that run an old Ogura two lobe roots supercharger.
Many people are running these well outside their original design parameters. At a certain point the lobes hit the housing and it wrecks the supercharger. Whenever I can I try to talk people into going a...
