Theoretical top speed on a stock tranny?
#32
01-01-2013, 10:24 AM
Join Date: Jul 2008
Location: Houston
Posts: 5,301
Rep Power: 605 
Haha. Closing off the front vents is a BAD idea. I've done it. The car over heats and it will blow the radiators.
Joe there are simple proven changes that even a 1/2 wit idiot could make without worry. The list I made in my prior post has many of them. Especially venting the front fender and closing off the front openings. OK yes they would require some basic though; but a very simple string test would tell you all that you need to know. Even NASA uses string tests to check flow. Here I found this picture and article to show you what I mean if you do not know. I did not read it yet but the picture serves to explain what I mean. And for your viewing pleasure it is even a Porsche. http://www.racingonthecheap.com/aerodynamics/
There are numerous simple books out there on car aero that would coach you through many simple mods that would make a world of difference and if you ever want to try again you can to call me I would be glad to help. I do know a thing or two about the aerodynamics of going fast even if it is meant to take flight or not take flight. The big thing with wanting to not take flight is knowing what to do with multiple air paths coming together, a little knowledge there and a few simple strakes could really help out.
Here is a list of the 7 auto speed articles on the subject, they are actually not all that bad.
Aero testing part one http://www.autospeed.com/A_108656/cms/article.html
Pt 2 http://www.autospeed.com/A_108674/cms/article.html
Pt 3 http://www.autospeed.com/A_108675/cms/article.html
Vortex generators for auto
Pt 1 http://www.autospeed.com/A_3058/cms/article.html
Pt 2 http://www.autospeed.com/A_3059/cms/article.html
Pt 3 http://autospeed.com/A_3060/cms/article.html
Pt 4 http://autospeed.com/cms/A_3061/arti...popularArticle
There are numerous simple books out there on car aero that would coach you through many simple mods that would make a world of difference and if you ever want to try again you can to call me I would be glad to help. I do know a thing or two about the aerodynamics of going fast even if it is meant to take flight or not take flight. The big thing with wanting to not take flight is knowing what to do with multiple air paths coming together, a little knowledge there and a few simple strakes could really help out.
Here is a list of the 7 auto speed articles on the subject, they are actually not all that bad.
Aero testing part one http://www.autospeed.com/A_108656/cms/article.html
Pt 2 http://www.autospeed.com/A_108674/cms/article.html
Pt 3 http://www.autospeed.com/A_108675/cms/article.html
Vortex generators for auto
Pt 1 http://www.autospeed.com/A_3058/cms/article.html
Pt 2 http://www.autospeed.com/A_3059/cms/article.html
Pt 3 http://autospeed.com/A_3060/cms/article.html
Pt 4 http://autospeed.com/cms/A_3061/arti...popularArticle
Last edited by BlackHorseTurbo; 01-01-2013 at 01:23 PM.
#33
01-01-2013, 04:21 PM
#35
01-01-2013, 04:28 PM
You can do something like this.
First pic are regular acro openings and not all that aerodynamic. Basically a stock set up. Notice big opening for cooling the cylinders and the small one on the bottom center is for Engine intake and now some use that for an oil cooler duct.
http://209.85.120.99/viewphoto.php?id=5860825&nseq=76
Here is the first generation of drag reduction and also better air flow. Notice it is fully removable and interchangeable with a different opening. The seams are a perfect fit and finish is worthy of an expensive car.
http://www.air-races.com/airblog/wp-content/gallery/rbar-rotterdam-2008/imgp1680-peter-besenyei.jpg
Here is the final arrangement Peter used on his last RAR plane, even better for cylinder cooling and even less drag. But whoever did this one really did not care about their seams. Seams like that make me and baby Jesus cry; they also create drag.
http://redbullairracefan.files.wordpress.com/2012/07/peter_besenyei_hungary___12.jpg
Notice the very pronounced airfoil shape on all the openings, that greatly effects how well an opening draws in air and also how aerodynamically effective they are. Something like this could easily be done to the front of your high speed cars. I do not think your biggest gains are now to be achieved by even greater power; I think they would come from better aero.
I really have had the best of intentions of making some Aero improvements to my car but I just cannot seem to get some free time to work on my own junk, specifically a radical new step wing for the back and a set of dive planes and a splitter for the front of my car.
Last edited by Engine Guy; 01-01-2013 at 05:15 PM.
#36
01-01-2013, 05:04 PM
You spend countless dollars chasing and R & Ding power yet you do not have the stomach for some simple acro mods. We are not talking a F1 car with multi tiered wings and countless strakes and canards all over the place.
There are certain things you can do that just will not hurt you. Venting fenders you could not screw up even if you tried. And it is not like these high speed mile people are not already having issues with the high speed Porsche light front end.
But I guess this is not unlike any other foreign task to a person, if you have never changed a tire for many people that could be to much.
#37
01-01-2013, 06:25 PM
OH please Tim has your wife hacked your 6 speed account (That was said for comedic effect not to be an insult)
You spend countless dollars chasing and R & Ding power yet you do not have the stomach for some simple acro mods. We are not talking a F1 car with multi tiered wings and countless strakes and canards all over the place.
There are certain things you can do that just will not hurt you. Venting fenders you could not screw up even if you tried. And it is not like these high speed mile people are not already having issues with the high speed Porsche light front end.
But I guess this is not unlike any other foreign task to a person, if you have never changed a tire for many people that could be to much.
You spend countless dollars chasing and R & Ding power yet you do not have the stomach for some simple acro mods. We are not talking a F1 car with multi tiered wings and countless strakes and canards all over the place.
There are certain things you can do that just will not hurt you. Venting fenders you could not screw up even if you tried. And it is not like these high speed mile people are not already having issues with the high speed Porsche light front end.
But I guess this is not unlike any other foreign task to a person, if you have never changed a tire for many people that could be to much.
#38
01-02-2013, 04:42 AM
Registered User
Join Date: Mar 2010
Location: Glasgow, Scotland
Posts: 41
Rep Power: 16 With my car making alot more whp than it was when it ran 231 i think its easily capable of going over 240 i just dont think the aero is there to do it.At this point i think it would be stupid to take the car back without doing some sort of aerodynamics testing.Getting the car in a wind tunnel with an aero engineer would be the ticket.Making any kind of aero changes without one would just be shooting arrows in the sky and actually is dangerous.I would advise anyone going back to be careful when making aero changes especially with things like flat panel bottoms.the car could just take flight if you get too much air under it or happen to spin sideways.I think one of the easiest and safest aero mods is to rake the car and get the front lower than the rear to keep front end lift to a minimum.I dont want to see anyone get hurt.
Thanks in advance.
Jim
#39
01-02-2013, 05:38 AM
it was making 975 awhp at the time it went 231 and is currently making @1300 rwhp.....
#40
01-02-2013, 07:05 AM
i just posted this chart as a tool. The 209mph is at 7000rpm based on this graph. Todd is reving to 7800 rpm so he will be quite a bit faster.
#43
01-02-2013, 01:33 PM
Join Date: Jul 2008
Location: Houston
Posts: 5,301
Rep Power: 605 It's argued that PCars only need about 675-700whp to hit 200. Bmoores and MBailey hit 200mph on the nose with around 700whp.
#44
01-02-2013, 01:38 PM
kool. i may see 600 rwhp when im done but its unlikely ill go farther. still 200 is a super cool #!!!