Heres my set up:

-89 vert
-rebuilt/streetported 13bt www.banzai-racing.com
-microtech lt8s ecu
-3'' ss exhaust/ intercooler pipes 24/12/3'' intercooler
-throttle body mod
-1000cc 2nds, 550"stock" primaries
-aeromotive fpr/ ss lines/ walbro 255
ect, ect, ect...

Car still needs to be tuned for bnr stg 4 turbo but still has the tune for stck turbo. Im not flooring the car and going into high boost(16lbs) but I am hitting about 7-10 when going semi fast. Recently the car starts to boost and then ...just sputters and slows down. After letting off gas, its fine until I try to boost again. Replaced spark plugs and still happens??? I have 1600 cc injectors waiting to go in, is this the problem?? Anyone??

-Dustin

 

sounds like it may be a wastegate problem

 

I have heard of the occasional issue with hybrids forcing the wategate open under boost. I think there is some discussion about in the BNR thread in the dyno section.

Having too little fuel (which you shouldn't) isn't going to do what you're describing.

 

Install a wideband so you know what is going on. Maybe your secondary injectors are not coming on line, or maybe thay are coming on with way too much fuel. Both would cause a sputtering, one is detonations and the other flooding.....Neither is good

 

stop doing that to the car , keep on boosting even a little bit without a tune and you will pay the price- trust me I know about this one- paid the stupid tax.

 

Thanks guys, Im gonna install my 1600 2nds and get ahold of Banzai for a tune.

-Dustin