i have a b20z with a gsr head skunk 2 pro 2 cams, skunk 2 intake mani. (old) style, hytech headers 2.5 str pipe connected to a apexi exhaust and a hondata s200 no tuning. when i start the car it feels like if it's going to turn off the idle keeps dropping until it warms now i drive it and i step on it the rpm starts go up at 5000 the car starts to back fire and then it just goes slow from there, so i pull over and rev it up all the way up to 7000 and nothing happens. now my friends tell me that i need bigger injectors i cant use the stock ones i think that i need to tune it but i bought my problem to ht to see if you guys have a better input .

p.s i swtich ecu's w my friend same problem happen

 

MAYBE, YES. Stock injectors at stock fuel pressure are good for about 170-180whp @80% duty cycle. If you raise fuel pressure you might get some more out of them, almost 200whp.
What pistons are you running? With Skunk 2 Pro 2 I believe you need at least 11.5 compresion ratio or higher to get really good power.
The idle issue is just tuning, you need to get the car tuned.
If you do need injectors, 310cc's would do the job.
Sounds like you have spent a lot of money and just need finish the project. hope this helps and good luck.

 

thanks man, and i have a stock bottom and skunk 2 pro 2 camsshaft i just want to see what kind of numbers im throwing

 

What was the whole point of buyin the s200 and nto getting it tuned? Get some new injectors and take it to get it tuned.

 

it doesnt matter if i have a stock bottom

 

It does matter cause you are not running a "stock motor". Dont assume that since you have a stock block your motor is stock... You NEED high comression (11.5:1 at least) to make power on big cams. However, since you are already running the motor you should get some kind of tune. Power is made or lost with a tune... In MY OPINION, stop beating on that motor, finish it completely including tune, and then romp the $hit out of it. You should be running a safer motor with more HP and TQ... I guess honda-tech really is "Put the biggest cams in a stock motor" site....

 

yes