JBA EVOL Exhaust system.
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From: Goshen, Ohio
JBA EVOL Exhaust system.
I purchased myself a JBA EVOL stainless steel exhaust system for my 1993 F-150. I finally received it in the mail and WOW! 3 inch diameter pipe is just huge! My t ruck only has a 5.0 on it. This huge pipe will make my truck look like a diesel. It's so big that my engine will literally echoe in it as if my truck were in a cavern. This has me excited. Now all I need to do is replace the Y-shaped crossover pipe with a stainless steel Bassini replacement which is also 3 inches in diameter. My exhaust will have almost no backpressure.
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Do you have that Offroad Y-Pipe or the one with the crappy nonfunctional catylitic converters? My truck has dual catalytic converters on it. I'm wanting to get wrid of both of them and put on a 3" diameter Magnaflow stainless steel catalytic converter. Is that Y-pipe the correct length and everything? I'm going to use stainless steel Dynomax exhaust clamps to hold the whole shabang together as well as the clamps that came with my exhaust system. I don't want any welding. Information and advice is appreciated.
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From: MA
Nonfunctional?? Here in MA, we have some of the toughest emissions testing in the country, and I passed with flying colors with Bassani's high flow Y pipe w/ cats. Sounds to me like it was working fine. The Y pipe was the correct length for the Bassani catback I had one, but I had to shorten it for my current Gibson catback. I chose to stay away from welding too. I far prefer clamping.
Rich
Rich
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They have to say that because they did not seek a C.A.R.B. exemption number. It works just fine. Its 'not good as a stock replacement' because you arent putting two back on. The one high flow does the same job as the two stockers. It all comes down to how much money they want to throw away (ie waste on a CARB number). If you ask the guys in the bronco forum what they think, they will say the same that I have. There are many that run the same exact pipe as I, and NONE have failed emissions due to it.
Rich
Rich
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Wow! That's great to know. Now I wish I didn't buy my JBA exhaust system. I kinda...planned on modifying the offroad version of that Y-pipe and adding a Cat on it that does have C.A.R.B. number. I'm runing the risk that the Y-pipe with a cat for my truck will be too long or too short. Hopefully it's just right but what are the odds?
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Out of curiosity did the catalytic converter that came with your y-pipe have a 4 bolt flange on it?
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Cool! My JBA exhaust instructions tell me to bolt my head pipe to the end of the converter pipe on the stoc catalytic converter. Is there a chance that the Bassani Y-pipe will be a few inches too short or a few inches too long?
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Originally Posted by Dalamatition
Now all I need to do is replace the Y-shaped crossover pipe with a stainless steel Bassini replacement which is also 3 inches in diameter. My exhaust will have almost no backpressure.
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From: MA
Originally Posted by Dalamatition
Cool! My JBA exhaust instructions tell me to bolt my head pipe to the end of the converter pipe on the stoc catalytic converter. Is there a chance that the Bassani Y-pipe will be a few inches too short or a few inches too long?
Rich
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Originally Posted by 95soontobelifted
If you run all 3" exhaust pipe won't you hurt the engine by not having enough back pressure? That is what I was always told.
Rich
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Frankly, most people dont. You would need air velocity sensors (same way they rate the CFMs for carbs)to truly figure out the equilibrium. I use the baseline that a single 3" system will support up to 360rwhp sufficiently. I havent heard that valve burning idea, but that doesnt mean its could be a valid point.
Rich
Rich