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Author Topic:   What RPMs do you top out at? Ford 2.3
shadoza
Dirt Maniac

Total posts: 123
posted April 21, 2003 12:43 AM  
I raced last season without a tach. This year, I got me a tach and Friday night I noticed I topped out at around 5500 or 6000. From what I have learned I can get up to 7300 safely. What do you guys top out at, and do ya think I should gear it down to get more revs?

ALSO, I WON MY FIRST RACE EVER FRIDAY NIGHT but that doesnt mean a whole lot since two of the three big money cars were no shows. Well it means a lot, but I know it doesnt mean that my car doesn't need more.

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im gonna be in front someday

b4racing
Dirt Forum Champ
Total posts: 626
posted April 21, 2003 03:23 PM  
I top mine out at 7800-8000 but it has had extreme amt of work done to it. what kind of cam and bottom end are you running what has been done to the head. On a pretty much stock head I would aim for 6500-7000 but if you can win at less than go for it as your engine will last a ton longer. but that is just my .02 BObby

shadoza
Dirt Maniac

Total posts: 123
posted April 21, 2003 05:47 PM  
Well, from what I know my pistons are .60 over and I have a hydraulic aftermarket cam. My head is milled to where the intake manifold bolt threads are visible. Other than headers, carb, and 110 fuel I think everything else is pretty much stock for now. I won pretty much by luck, I drew low number for the first race of the year and started on the pole, the one big money car that showed up was bumping my rear until the last lap, when he spun in turn 2. Its pretty fun racing while looking over your shoulder, HA. Yeah I think I need to gear it down a little, or go with some smaller tires, that would be a cheaper option. If you are turning 7800-8000 rpms (b4racing) I am guessing you have a roller cam? Well someday, maybe I will have one of those. I am just scared of dumping $$$ into my car and them closing the class.

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im gonna be in front someday

b4racing
Dirt Forum Champ
Total posts: 626
posted April 21, 2003 06:07 PM  
I know what you mean it just hit me this week end how much I spent over the winter. I am suprised I still have a house and a wife. lol I would shoot for 7000 any way. And tires are a very good way to gear down what kind of gear are you running now and what size tires and last but not least what size track. later Bobby

shadoza
Dirt Maniac

Total posts: 123
posted April 21, 2003 06:25 PM  
1/2 mile track. I have no idea what my rear gears are now. I am running "used" performance tires from a local tire store. I know I would get better performance from a new performance tire. But I am trying to keep my wife, haha. Well My tire sizes are 215/70/14, with a 215/75/14 on the right rear. I am thinking or going down to a 60 or 55. Thanks for everything.

b4racing
Dirt Forum Champ
Total posts: 626
posted April 21, 2003 08:44 PM  
well what trans do you have.

shadoza
Dirt Maniac

Total posts: 123
posted April 21, 2003 10:29 PM  
ummmmmm... yer guess is as good as mine. It is a 4 spd with the reverse like a volkswagen's, up next to first gear. Which stinks (it wont let me say ***** for some reason) because sometimes when I spin out I slam it into first and OOPS, start heading backwards.

[This message has been edited by shadoza (edited April 21, 2003).]

b4racing
Dirt Forum Champ
Total posts: 626
posted April 21, 2003 11:33 PM  
well it is one of 3 1.81 1.97 or 2.14 respectively. the 181 is doughtful but if it is HOLD ON TO IT they are valuable to road racers and the last one I saw was priced at a little over 200 or maybe even 300. I would definiatly check it and these values are for second gear. It is easy to check if it is in the car or off if on take out your spark plugs put the trans in racing gear and turn the crank 10 full turns have someone under the driveshaft counting how many turns it makes for a 2.14 it should make about 21 and almost a .5 and for a 1.97 it should make 19 and 2/3 . This will help start a base line of what you have Also when you figure it out write it down! Take notes on everything and everywhere. I would bet that you are running either a 2.73 rear or a 3.08 but that is only a guess again. Later Bobby

orbitration
Dirt Newbie

Total posts: 3
posted April 22, 2003 01:05 AM  
I run a 2.14 trans and a 3.55 with a 13in tire and rpm ou about 6500 to 7000 with pretty good results. we have to be carful on our restarts but if somby is holding the pack back than we fall back about 15 feet.

shadoza
Dirt Maniac

Total posts: 123
posted April 22, 2003 02:05 PM  
I will try that out and see what happens. Thanks

b4racing
Dirt Forum Champ
Total posts: 626
posted April 22, 2003 03:28 PM  
that sounds like a really deep gear for a 1/2 mile track. That is what most run on 1/4 miles and still turn more than that. What size track do you run on orb.

trey_#23
Dirt Maniac

Total posts: 150
posted April 22, 2003 05:56 PM  
I would look at your setup and put a cam to fit your range as a cheap tune-up. We run a 3/8 track on the inside and I turned 7200 my rookie year with a stock lower end, shaved head, and isky cam with 14" wheels. This year is about to start and I have reached 8000 with a mech cam, shaved head, big rods, light pressure plate and clutch, light flywheel, and 15" wheels, and some extensive head work.
I use a Pinto 4 speed with 2.14 2nd gear ratio. There is a Pinto/Mustang II tranny (RAD) with 2.20 ratio (no parts available for replacement).

joeracer95
Dirt Roller

Total posts: 15
posted April 23, 2003 09:17 AM  
on a fast 1/2 mile we run a 2.73 rear with a 2.14 tranny and 215/60/14 tires(75" circ.).we turn 7500-7700 because thats where our cam's "power band" is at.you can spin a hydraulic head upwards around 8200 if the head geometry is right.select the gear to put you in the right rpm's for your camshaft.as a general rule camshafts with alot of duration and centerlines around 108/110 like to see 7800+ if your dependable bottom end agrees.high duration cams with a little less lobe separation seem to work very well on 1/2 mile tracks with "stock" limitations.they can be a little tricky to setup geometry correctly for a stock rules head but will absolutely fly.what rules do run under for your engine combination?
Mark-Fast Forward Racing Engines

shadoza
Dirt Maniac

Total posts: 123
posted April 23, 2003 02:25 PM  
http://www.elpasospeedwaypark.com/rules.htm#MS

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