Extended hood or short hood??

What kind of turbo boost are you getting when its working hard? How about pyrometer readings?

 

U got other problems other than 3.90 and supper 10 killing ur mpg
How long sence the overheads been ran ?
Have u checked all the air to air boots and cooler with soap and water for leaks ?
Are u running straight pipes With no back pressure On turbo ?
Do u have a fuel pressure gauge ? If so what pressure u got ?
is it a steady or dose the gauge flicker ?
In the hills do roll in of the Excelerator
Going down hill and roll out of it slowly as u start to climb hills topping them almost all the way out of the Excelerator
Not Bing a smart $$$ just asking ?
Some people just don't know how to make a cat of the 99 ere work

 

What rpm are you climbing hills at? Sounds to me like you're trying to climb at 1200-1300.

 

You shouldnt have a problem. What are the Boost and pyro numbers like @special-k mentioned?

 

Hey my gauge flickers, what does that mean? I've been wondering. B model cat with plenty boost.

 

Fuel gauge I recon that's what ur asking man on a b model idk