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allenh318 · 03-12-2012, 01:28 PM

I have a 94 s10 with a 4.3l Z TBI, 4x4. I am getting 22.0 mpg after tune up, and I have made a intake that goes on the end of the snorkel and can be a wai or cai, but am not sure which would be better. The problem is, their is a butterfly valve in the air filter housing that opens and shuts depending on how cold the air is. When shut it draws air from the exhaust manifold which is only 1 1/2 inches wide, and then opens up after the engine is warm. If I make my intake cai, it will keep the valve closed longer, especially on cold mornings on my way to work 15 miles away. My question is, if I leave it as a wai, it would stay open more and allow a lot more air in because the regular intake is 4" wide, and without any IAT or MAF on it what affect will that have on the engine and rich/lean mix? Not sure which direction to go with it?

03-12-2012, 01:28 PM	#1 (permalink)
allenh318 EcoModding Lurker Join Date: Mar 2012 Location: pa Posts: 36 Infiniti - '11 Infiniti G25X AWD 90 day: 29.82 mpg (US) Thanks: 0 Thanked 1 Time in 1 Post	Chevy s10 mod questions I have a 94 s10 with a 4.3l Z TBI, 4x4. I am getting 22.0 mpg after tune up, and I have made a intake that goes on the end of the snorkel and can be a wai or cai, but am not sure which would be better. The problem is, their is a butterfly valve in the air filter housing that opens and shuts depending on how cold the air is. When shut it draws air from the exhaust manifold which is only 1 1/2 inches wide, and then opens up after the engine is warm. If I make my intake cai, it will keep the valve closed longer, especially on cold mornings on my way to work 15 miles away. My question is, if I leave it as a wai, it would stay open more and allow a lot more air in because the regular intake is 4" wide, and without any IAT or MAF on it what affect will that have on the engine and rich/lean mix? Not sure which direction to go with it?