Landracing Forum
Tech Information => Technical Discussion => Topic started by: gunracer1 on December 19, 2005, 02:12:15 PM
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ok i am dumb as a box of rocks when it comes to top speed stuff. and i am using on of the worst designed rigs for it. 1998 dodge 3/4 ton diesel 2wd reg cab auto. i am calling this truck project 11:30 shooting for 11 second quarters, 30 miles per gallon, and i would love to break 200 mph with it. i have a friend that went to bville and he planted this in my head. so i will spend too much money and time to make it happen. i have no problem getting 800 rwhp, i have everything i need for that. the tranny and gearing will need help. one guy i talked to was worried about the od planetary running without enough oil at high rpm. i am still looking at a winters quick change but i am afraid the tq will just be too much for it. i have dana 80's that i can use. but i will need some kind of secondary od. i could spin it to 4000 rpm and it would be at 160 with 33"rubber. i want more mph and my peak power will happen right at 3500 or so. and does anyone have any idea how much hp it will take to get this brick above 200. thanks mike
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i want more mph and my peak power will happen right at 3500 or so. and does anyone have any idea how much hp it will take to get this brick above 200. thanks mike
A gear vendors overdrive might work for you since you have the torque to pull it.
Look at Bank's site ( HERE (http://www.bankspower.com/sidewinder-dakota_platform.cfm#) ) and I'll bet you find some answers to your questions.
c ya, Sum
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7-800 hp, nv5600, marine intercoolers w/40 gallons of ice H2O, 3.07 gears in a quick change and dump it into a Dakota body = 222.139 exit speed.
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i have read all of the banks info, and i want to keep this a full size pick up with nice seats and ac. the gearvendors do work but they don't really like the big hp. and they are quite pricey, i am looking to do this as cheap as possible. yea that is a oxy moron, race car and cheap just don't fit in the same sentence. but i don't have a lot of money to do this project, but i can fab up about anything i need.
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Doing a little assuming, i.e. frontal area equal to approx 6 ft wide by 5 ft high and a CD (Coefficient of Drag) of 1.0 (which is probably very optimistic for your truck) to go 200 you will need somewhere in the neighborhood of 1650 HPS! with 800 you would go approx 155- 160 mph. The formula is:
HP=CD X Frontal Area X mph(raised to the power of 3) /146600
So do what ever you can to lower the frontal area, i.e. lower the truck to a 2 inch ride height, chop the top, narrow etc. and do what ever you can to lower the CD, close of the radiator, cover over bed, remove anything that sticks out into the airstream etc. will help also you may want to go for some propane and a compound turbo system for some more HPs.
Looking at the gear ratio thing you would need a 1.57: 1 ratio, using 33 inch tires. (MPH=RPM x tire dia in inches/gear ration x 336)
Since you sound ready to spend some real money, contact Dick Holt at Holt Machine, Santa Ana CA. He makes big power quick changes with ratios in the 1.5 area. Theses are good for 1500 hp+. I don't have his telepohone number but I am sure that someone will provide it.
It is only money!!!
Rex
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First thing is to dump the nice stock seats, they ain't allowed.
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Since you sound ready to spend some real money, contact Dick Holt at Holt Machine, Santa Ana CA. He makes big power quick changes with ratios in the 1.5 area. Theses are good for 1500 hp+. I don't have his telepohone number but I am sure that someone will provide it.
It is only money!!!
Rex
Dick's shop is called Qualty Machine, his #714-429-0250
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and i am using on of the worst designed rigs for it.
Well, I'm going to try for the 130 maybe the 150 club. My frontend is even worse then yours, at least you have some curves :)
Bed caps are allowed and you may want to pick up a Snow Performance Stage III meth injector and use straight water. It's allowed and you can pick up around 20-30hp I believe. But don't hold me to that.
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ya still gotta ditch those stock seats if ya wanna run with the SCTA.
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"...chop the top, narrow etc...."
Can't do it and run in Diesel Truck class for a record.
DW
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this is the kind of info i am looking for, thanks. i will have a compound set of chargers on it with a water injection set up and i have been looking into doing a water to air intercooler. i was thinking air bags all the way around to make it adjustable on the ride height. i really want to keep this truck street friendly but if it is safety issues, i will have to agree.and there is no doubt it would be much easier to do it in a dakota verses a full size. i have had my daily driven 4x4 dually up in the mid 130s and it was still pulling strong. but i was starting to worry about the rubber at that speed.
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a CD (Coefficient of Drag) of 1.0 (which is probably very optimistic for your truck)
http://trucks.about.com/od/2005pickuptrucks/a/ramsrt10_quad_2.htm
0.45 :)
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here's a dodge like yours. Unfortunately I don't believe you can run in those classes anymore. There must have been a rules change and a class consolidation since 1996.
Anyway 400hp/900lbs of torque netted 141.256
http://www.cummins-oer.com/projects2f.html
(http://img461.imageshack.us/img461/7416/bonneville6mn.jpg) (http://imageshack.us)
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Using Headshots data, i.e. 400 hp went 141 mph, if you double the hp to 800 the truck would run 158-159 mph (12.5% faster) and if you check my post of 12/19/05 I said 155-160. The laws of physics still work!
Rex
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400 hp went 141 mph
:shock: :shock: :shock: :shock: :shock: :shock: :shock:
GOOD GOD MAN!
Get a smaller car! :P
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Unfortunately he doesn't say what gears he was running. If you go through what banks did on the dakota he had to add the airdam on the bumper I think it saved him the need of 200 hp. These days 8-900 hp cummins are slowly becoming commonplace and 800 is streetable as a daily driver. Well I know of at least one I read about in TDR magazine.