TBI spacer? 89 4.3

I've not tried them, but it seems to me that the idea of preventing or reducing heat transfer up into the intake makes sense for a carburetor (vapor lock and all), but has little or no relevance with fuel injection.

I'm not sure about the heat transfer. I thought that the added space theoretically lengthened the pleneum and allowed for a better fuel air mixture or something like that.

Moving the injectors next to the intake valves like in the SFI setup does that. Do you really think that if the engineers designing the engine could improve anything by mounting throttle body a bit further up they wouldn't have? It's the same as the fuel line magnets and other MPG voodoo, if it was that simple and actually worked, it would be standard equipment.

I've got one on my Jeep. I don't think it gave me any more power, and it didn't affect the gas mileage one way or the other. I believe that what it does is actually move the torque curve down so that you feel like it gives a bit more power sooner in the rpm range. If I'd had to pay for the spacer, I'd have been disappointed in it, but since it was free, I left it on there. T'was me, I'd just change the TBI gasket and get on with life.

-- Old Crow "Yol Bolson!" '82 FLTC-P "Miss Pearl" '95 YJ Rio Grande BS#133, SENS, TOMKAT, MAMBM

I understand that train of thought. I agree and disagree. I am not sure that just because it doesn't come the truck that it can't help. If better flowing cat converters and mufflers can improve performance slightly why don't they just put them on the vehicle? Or if stronger coils, and lower resistance wires improves performance slightly why wouldn't they come stock. Especially since the upgrade parts are not that much more than the OEM replacements. I can't imagine that GM couldn't get the better parts for a fraction of an increase considering the volume they do/did. If the stock engine was always perfect, then why do they come up with newer and better ones? Regardless, I asked for opinions from those who have ACTUALLY tried the product. I respect your opinion, but as stated in my first post. I only want input from ppl with personal experience with the product. Thank you

You are using reason to debunk this. Unfortunately, manufacturers do not always use this reasoning. They work on a financial basis and even though the cost of a spacer is minimal does not necessarily mean they will do it. There are plenty of simple things that actually work that no manufacturer puts on as standard equipment. If you ever succeeded in business you would understand that a little bit here and a little bit there cuts into your profits. When I rehab a house I could cheaply upgrade this and that and the other thing, but would end up either not gettingthe property because all these little things can easily add up to thousands of $$ and then I bid too low and don't get the house or I destroy my profit margin and can't afford to stay in business. Instead I give a fair price to the seller and give a nice house to a buyer at a fair price and I can afford to keep doing it.

Mike D.

It has to do with reliability. They have to warranty these things for

100k(powertrain, anyway)now and to a certain degree, anything that increases performance, decreases reliability. Sure, free flowing exhaust may give you more power, but possibly the cat and/or muffler might not last as long. When the 6.5 turbo diesel came out the boost on the turbo was limited. I had a customer who added a spring to the linkage on the dump valve. Interesting setup, actually increased the boost by about 50%. Unfortunatly, when he cooked the tops of the pistons, this setup also cooked his warranty.

Like I said, I've got one of those spacers on my Jeep(have had for about 3 years)and IMHO, if I'd had to pay for it, I'd consider it a waste of money.

-- Old Crow "Yol Bolson!" '82 FLTC-P "Miss Pearl" '95 YJ Rio Grande BS#133, SENS, TOMKAT, MAMBM

They can help with TBI systems as spacers increase phlenum and mixing of fuel and air. On non TBI FI systems, they are a waste of money.

SnoMan

Let the Trolls desend as their egos and insecurities need to be feed....

----------------- TheSnoMan.com

Nice sig line snomoron. Makes no sense grammar wise but it has a nice rhyme to it.