So I have a show comming up the 22nd with drag events, and I cant afford dyno tune but I can afford to have the bottle filled, tell me if you think I should wait till I can get my A/F dialed in on a dyno or will I be fine running a 75 shot a few times before I tune?

 

75 shot is risky on the stock block with no tuning. i'd say a 50 shot would be fine untuned, but with a 75 it would be a good idea. Not to mention that dyno time and expense could save you thousands more as opposed to blowing the motor. just my $.02...

 

well its not the block Im scared of if can handle 8psi a 75 wet shot is nothing, im worried about the ECU not adjusting my A/F well enough and leaning out

 

tuuuuuuuuuuuuuuuuuuuune!

 

tune first, or rebuild later...

 

As the old saying goes, "Better safe than sorry." And in this case "sorry" would be a very expensive mistake. In theory, yea you might get away with a few runs w/out a problem. But then again, you might not. If you really are strapped for cash, borrow some from your mom or dad or someone. You are going to have to get it tuned eventually, better to do it before you possibly cause damage to your engine.

 

yeah, i just wish I knew how well the computer adapted the A/F ratio

 

Like the others said, why spend all this money on your car just to throw it away for a couple runs... Take the time and get your car tuned to run more safe on a 75 shot....

 

plus if you do run with no nitrous first you can get a good base line.
good luck

 

took the words right out of my mouth

 

well its still a toss up atm i have its really gonna come down to what my A/F is now at WOT after the colder plugs

 

Go run it, and then tell us that you should've tuned it.

 

ummm...the colder plugs are not gonna change your a/f ratio

 

sure they will. he'll be taking in lots of air with that new hole in his block after he's done running.

 

its not just the A/F ratio you need to worry about, you also need to pay close attention to the cars timing. when i ran my 75 shot w/o tuning my car was all over the place. i would run ungodly lean at 4500 then run way to rich up top. I tell you now its gonna take a mixture of fuel jet sizing and fuel mapping. i currently use the Ultimate but will be switching to the F/IC soon. I you want i'll pm you the person you need to talk to picking one up.

 

Blue TC Man you have a pm

 

wow Im going crazy I meant timing I know it wont alter it much but hopfully enough

and 75 shot i know I dont need a fuel engine management system timing doesnt need to be taken back more than two or 3 degrees and I can do that off the crank, other than dialing in my A/F so im not leaning out is all I have to do, which from some dynos Ive seen im not to worried about at this point

 

better safe then sorry. Last thing you need to do is blow your engine

 

better safe then sorry. Last thing you need to do is blow your engine

 

you have to remember that everything in this car is controlled by the ecu so you won't be able to get away with that like you would on older honda motors. also with this ecu always adjusting everything to run the A/F and timing that toyota programmed. your a/f ratio might be all out of wack like mine was. so both are important.