think shes got 12s in her

Ontariov8 · Post by **Ontariov8** » Tue Jan 20, 2009 10:40 pm

Well to start off i have a 1994 ford ranger 2wd short box with the following mods suspension its lowered in front 2" drop coils 3" drop beams out back flip kit. Using toxic lowering shocks on all 4 corners. Also usin call tracs designed for the flip kit. Tires running 275/45/17s on mustang bullits 8" rim up front out back running P315/35R17 micky thompson et street radials out back on deep dish bullits 10.5" rim. Not rear end is a 8.8 with 3:73s an a traction lock. Transmission is a t5 with a centerforce dual friction clutch. Motor is a 306 with brand new Trick FLow track heat heads that are ported and polished and the valves have been worked as well. the T-body is Edelbrock 70mm and the intakes are Edelbrock 5.0 and are fully ported and polished and come with a 1" heat spacer. The rockers are brand new Comp pro magnum chromoly. The motor is stock crank and rods with arp fasteners and Speed pro forged pistons. The head bolts are Arp as well. running 24lbs injectors underdrive pulleys an a bbk cold air kit what you think i should run in the 1/4 on a good prept track at 600 feet above sea level thanks guys cam is like a e303 as well

usmcrp1044 · Post by **usmcrp1044** » Wed Jan 21, 2009 7:15 am

I have desktop dyno, as well as some desktop drag racing simulator. I'd be happy to run it for you but, I need some more numbers.

The things I specifically need are some type of cylinder head flow chart. I know you say they are ported and polished, so unless you had them on a flow bench and have your own numbers, it's not going to be accurate. I can put in the stock numbers to, and it's just going to be a rough estimate.

I need to know your compression ratio. If you don't know, then I would need what cc the heads are, what the bore is(I'm assuming 4.030in if it's a 302 bored 30 over.) I also need the head gasket thickness, and piston down bore @TDC.

The one thing I hate about desktop dyno is the induction part. It is very limited, so I need to know how many CFM the induction flow is. I'm not certain how to tell with fuel injection, but a carb's size is usually given in cfm. I would imagine both the size of the injectors and the throttle body would make a difference. I also need the intake manifold type to.

What type of exhaust do you have? I'm limited to stock, or high performance manifolds w/ mufflers. I would imagine the high performance to be the explorer headers. I can also pick from small tube headers or large tube headers with or without mufflers. Use your imagination, I've always considered 1 1/2" and smaller small tube headers.

I believe I have all the right stuff for the cam, I found the specs on ford racing.com

So, if you can figure out all that stuff, that should give you a somewhat accurate dyno rating. Then I can try transferring it to the drag racing program. It's kinda complicated but worth it in the end.

Dave · Post by **Dave** » Wed Jan 21, 2009 7:51 am

I found these estimaters that are based on your estimated HP and weight. I think the limiting factor might be that E-303 cam. I've got a bunch of dyno tests that MM & FF did a couple of years ago on injected motors. Think usmcrp is going to need your valve size and rocker ratio also.
Dave

http://robrobinette.com/et.htm

http://www.milesgallon.com/quarter_mile ... eight=3200

http://www.tunercalcs.com/

http://www.geocities.com/motorcity/4601/hpcalc.html

Ontariov8 · Post by **Ontariov8** » Thu Jan 22, 2009 8:37 am

thanks guys ill driy to get more info on this motor for ya to give me a better idea thanks again

88ranger306 · Post by **88ranger306** » Thu Jan 22, 2009 10:54 am

i'm not sure how much 600ft above sea level affects power, but your biggest factor is the manual transmission. It all depends on how good of a driver you are. If you had a c4 with that motor set up I would imagine you could go 12.50's. Not sure about the 5 speed though.

Dave · Post by **Dave** » Thu Jan 22, 2009 11:35 am

Ya, the more I look into what your parts are, they are so, so many varibles. Didn't realize there were so many different Trick Flow street heads and options. Same thing with Edlebrock heads, just can't do a good simulation. Do have a bunch of different dyno tests that MM & FF did a couple of years ago with similar combonation to yours. Head tests and intakes also if anyone would want me to sent them out. It's cold everywhere and is good reading.
Dave