have a lt1 355, ported heads , 11.6,1 cr, 150 hp dry nos , stock ported maf,was using the stock 48 mm tb with this combo everything was fine, yesterday I ported the inake for a 58mm bbk, installed the bbk, ran it no nitrous ,fine,. went out tonight no nitrous jet changes, hit the button and bam pop popop, I imediately thought bigger tb more air , lean cond. Went from the 59 fuel jet to a 53 no more pop but short flames out the exhaust and vibration , does computer need to be reprogrammed for bigger tb or just keep playing with jets? oh yeah running 101 unleaded and ngk tr6 plugs

 

Ok a little confused here..
Is it a wet kit...or dry kit....????

Normally if it is bacfiring through the exhaust you are to rich

 

dry system w/ adj. fuel reg. bypass tee for fuel jet, nos system

 

He's talking about the jet in the T. I'm assuming you have the 67 jet at the nozzle? 59 to a 53 won't richen it up that much, but it will a little. I wouldn't hit it until you get it on a wide band and see what your A/F's are. Maybe even cut it down to a 75 or 50 shot to test it initally. You have any way of scanning it?

Ken R.

 

yea checking the plugs, hell the tech boys at nos said i could run a 48 and 80 to get 200hp , i am wondering if i am not going to have the computer reprogrammed for the bigger throttle body

 

you need to get a wide band reading and see what the car is actually doing

 

Agree with the above, I would see what shes doing with a wide band and datamaster.

 

can you guys give me a site or brand and model # of the system your mentioning, have not used that setup yet but geuss i am ready to gat educated The more i know the faster i can go

 

I'm pretty sure he is using this kit: http://www.thunderracing.com/catalog...vid=4&pcid=161 Kit #5176

 

i meant the wideband o2 sys., I am just going to install my noSzle system on it and take offthe dry system, problem solved