Hi All

Recently got some AFR 180cc, a 268XFI Cam and ported TPI fitted to my '90 GTA TPI (speed density). Oh and some 1.6RR and 25lb blue tops

car is running pig rich to the point its spitting unburnt fuel out of the exhaust and a hunting idle around 600-850rpm. Is that just because it needs a tune or something mechanical amiss?

I considered the setup to be on the mild side so thought it would at least be driveable as is but I'd be leaving some hp on the table without the tune. I'd be surprised if I'm getting double digit mpg at the moment

thoughts welcome

 

Bloody hell mate, yes, needs a tune bad. The cam will lower the VE at lower RPM, and increase it at higher RPM. The injectors are flowing 15% more fuel then the stock ones.

Moving to the DFI & ECM board.

RBob.

 

thanks.

I read about people going for H/C/I swaps and some massive injectors and clicking off 11s down the drag strip all on standard tune!

But yeah, it's guzzling at the moment. Just hope I don't have a leaky injector (new ones are 24lb btw, my bad above) or a broken afpr.

I've got in contact with Scott Hansen of Tuned Port Injection Induction Prog. Services. I know a mail order tune isn't the best but given my limited (read 'no') knowledge of tuning, this should hopefully get me back on the road. I can datalog and start thinking in 1's and 0's later on

 

Your going to be be way better off if you order a moates.net g1 a burn 2 and a few sst27sf512 or save your self alot of work bye just buying a dynamic efi ebl p4.

 

thanks, Dynamic EFI seems to be the way to go. Self-learning feature is a big plus.

I'll pm Rbob

regards