Would you please define "highly drafted intake port"?
Search found 288 matches
- Sun Feb 11, 2024 12:33 am
- Forum: Engine Tech
- Topic: Source for Tulip Head Valves
- Replies: 15
- Views: 891
- Sun Aug 28, 2022 12:30 am
- Forum: Engine Tech
- Topic: Runner Diameter for turbo manifold
- Replies: 18
- Views: 1870
Re: Runner Diameter for turbo manifold
One way to size the primary might be the following. Take the boost pressure that you intend to run at peak power and compute the pressure ratio to atmospheric pressure. For example, if you're running 0.5bar boost, this ratio would be 1.5. Next, take your target power in hp and divide it by this num...
- Sat Jun 04, 2022 1:01 am
- Forum: Engine Tech
- Topic: Piston oil squirters in NASCAR engines
- Replies: 71
- Views: 12384
Re: Piston oil squirters in NASCAR engines
For me, the piston temperature is about piston strength. Aluminum loses strength rapidly above 200 degrees C . . . and according to the previously referenced paper from Mahle, page 19, figure 1.4, a typical temperature for the lower surface of the top ring groove is 227 degrees. ASM lists the yield ...
- Thu Apr 01, 2021 12:17 am
- Forum: Engine Tech
- Topic: Dumb QOTD: Why does load induct pre-ignition / detonation?
- Replies: 21
- Views: 2259
Re: Dumb QOTD: Why does load induct pre-ignition / detonation?
For a particular fuel, auto ignition is caused by a combination of three variables ... time, temperature and pressure. Increasing throttle position increases cylinder pressure, low engine speed increases the time available for auto ignition, and charge temperature will be higher at low engine speed ...
- Tue Mar 30, 2021 2:21 am
- Forum: Engine Tech
- Topic: Ultrasonic cleaner for small parts
- Replies: 15
- Views: 1988
- Mon Mar 29, 2021 11:04 pm
- Forum: Engine Tech
- Topic: Ultrasonic cleaner for small parts
- Replies: 15
- Views: 1988
Re: Ultrasonic cleaner for small parts
Thanks, what really I'm looking for is the power in watts.
- Mon Mar 29, 2021 10:23 pm
- Forum: Engine Tech
- Topic: Ultrasonic cleaner for small parts
- Replies: 15
- Views: 1988
Re: Ultrasonic cleaner for small parts
What kind of cleaning power do your units have?
- Mon Jul 06, 2020 9:06 am
- Forum: Engine Tech
- Topic: Steel Main cap material
- Replies: 33
- Views: 4464
Re: Steel Main cap material
Unless you plan to make them yourself, you can buy a set from Mini Mania.
- Sat Jul 04, 2020 10:24 pm
- Forum: Engine Tech
- Topic: Steel Main cap material
- Replies: 33
- Views: 4464
Re: Steel Main cap material
The difference in expansion coefficient is not a problem. I have used steel main caps on aluminum blocks with good success. The combination can also be found on some Cosworth race engines.
- Tue May 05, 2020 10:13 pm
- Forum: Engine Tech
- Topic: Piston oil squirters in NASCAR engines
- Replies: 71
- Views: 12384
Re: Piston oil squirters in NASCAR engines
From this paper ...
http://www.f1-forecast.com/pdf/F1-Files ... P2_08e.pdf
"the flow rate oil injected was slightly higher than 10 l/mim"
That's a lot of oil.
http://www.f1-forecast.com/pdf/F1-Files ... P2_08e.pdf
"the flow rate oil injected was slightly higher than 10 l/mim"
That's a lot of oil.
- Mon May 04, 2020 12:48 am
- Forum: Engine Tech
- Topic: Piston oil squirters in NASCAR engines
- Replies: 71
- Views: 12384
Re: Piston oil squirters in NASCAR engines
In general, the purpose of an oil squirter is to cool the piston. They are designed to direct a stream, not a spray, at the bottom of the piston crown, not the cylinder walls.
I have no idea if NASCAR teams use them.
I have no idea if NASCAR teams use them.
- Fri Dec 06, 2019 8:13 pm
- Forum: Engine Tech
- Topic: 3D Printing - Cool Assembly Tools?
- Replies: 42
- Views: 8099
Re: 3D Printing - Cool Assembly Tools?
The carbs have a rubber bushed support rod, but the typical soft mounts between carbs and manifold aren't needed.
BTW, I printed a couple ring squaring tools today. Thanks to whoever suggested that ... great idea.
BTW, I printed a couple ring squaring tools today. Thanks to whoever suggested that ... great idea.
- Fri Dec 06, 2019 2:13 am
- Forum: Engine Tech
- Topic: 3D Printing - Cool Assembly Tools?
- Replies: 42
- Views: 8099
Re: 3D Printing - Cool Assembly Tools?
here's a view of the model of the ring squaring tool I had came up with, for a reference I tried to attach the .STL but says that filetype is not allowed here this puts the ring about 3/4" down the bore. You're going to have a difficult time printing that design in one piece with FDM because o...
- Sun Dec 01, 2019 3:29 pm
- Forum: Engine Tech
- Topic: Weld or putty
- Replies: 12
- Views: 1975
Re: Weld or putty
The problem with epoxy is its coefficient of expansion. If that's your choice of repair method, I'd recommend looking for for one that is aluminum filled to match expansion rates as closely as possible.
- Sun Dec 01, 2019 1:17 am
- Forum: Engine Tech
- Topic: Weld or putty
- Replies: 12
- Views: 1975
Re: Weld or putty
This is an excellent candidate for a weld repair. Clean the surface all the way to the bottom of the flaw with a cabide burr, weld (100% penetration), finish the weld within 0.010 then peen the weld with a round nose punch. Unless it's peened, a weld will have a residual tensile stess ... which coul...