Stalling issue

[702GT]

In Canada 2 55mm circles do not equal a 110mm circle.

Pi x radius squared = area of a circle = Pi x (Diameter squared /4)

55mm circle = (27.5 x 27.5) x 3.14159 =2375 mm area x 2 circles = 4750 mm area

4750/ Pi= 1511 square root of 1511 = 38.87= radius x 2 = 77.74mm diameter

This is a hell of a ways away from a 110mm opening.

The twin 60mm of a GT500 throttlebody is the equivalent of an 85mm throttlebody

You are absolutely correct in the math, I never considered the true area of opening. Thanks for the correction, been thinking the wrong way for years!

Thinking of it like that, twin 60's are massively overkill NA!

 

[pudgy234]

What kinds of problems happen with this TB?

 

[702GT]

What kinds of problems happen with this TB?

If you're referring to the BBK; back in the day BBK had an issue with the actuating internals, so the TB wasn't doing what the pedal was telling it to do. Occasionally just out-right failure, causing the car to go into safe mode. Usually if you wanted to run one, you'd have to swap the guts from your stock TB into the BBK. Supposedly they have addressed the old issues since then. BBK has a reputation for not producing the greatest of quality parts, from headers to intakes. Generally, you should be fine. Some people would rather not risk their $10,000 engine setups on a $300 throttle body, that may or may not be dependable. If you really need something bigger than a twin 60mm GT500 T-body, L&M or FRPP make bigger/better, IMO.

 

[pudgy234]

I didn't realize the issues with these. I know the bbk high flow fuel rails sucked and I sent them back

 

[pudgy234]

So I'm bringing this thread back because Im still stumped. So the car has been retuned via local speed shop on a dyno. The stalling problem has gotten much better. Going back for some tweeking in a couple of weeks. I'm baffled on my p0345 and p0349 codes. Didn't go away with the new tune, replaced diodes in the alternator came right back, switched the sensors side to side- code stayed on the same bank. Checked voltage signal at both sensors- ranged .3-.75 volts on both sensors. Is there something I'm missing?

 

[Minervini1981]

Pudgy in having the same issue now. Did you ever figure it out?