Charcoal canister guestion

[Blazer 383]

I’m on a budget, so I’m trying to stay all GM. If I get a tbi from the same generation big block, will it feed it sufficiently, is it plug n play? I am looking for reliability and longevity. Any advice would be appreciated.

 

[PlayingWithTBI]

If I get a tbi from the same generation big block, will it feed it sufficiently, is it plug n play?

Almost, you'll need the IAC adapter.

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Maybe a TPS adapter depending if you're going with an older to newer style (flat to round) TB

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[Blazer 383]

Just found a 454 tb from a local wrecking yard, 100$.

 

[Blazer 383]

Other than the iac adapter, any other issues I should be aware of? Again, thank you

 

[someotherguy]

Instead of getting a used big block TBI that may not work well, and spending money on adapter harnesses, just get yourself a bored-out small block TBI from R.V. Morse Machine.

BTW big block throttle bodies will have higher pressure injectors if it's from a 94 or 95 model. Those run 26~32 psi off a higher pressure pump. Earlier years run the same spec as a small block TBI. Just something else to watch out for.

Richard

 

[PlayingWithTBI]

just get yourself a bored-out small block TBI from R.V. Morse Machine.

Unfortunately he passed away in July and they shut down.

big block throttle bodies will have higher pressure injectors if it's from a 94 or 95 model. Those run 26~32 psi off a higher pressure pump. Earlier years run the same spec as a small block TBI.

^^^This, here's a chart with PNs and flow of most stock injectors

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[someotherguy]

Unfortunately he passed away in July and they shut down.

Wow; that's a bummer to hear. Didn't know the folks, but sucks nonetheless. Going with R.V. was the cheaper way to get the good bored-out throttle body without paying the mark-up that CFMTech put on his work.

Richard

 

[PlayingWithTBI]

Wow; that's a bummer to hear. Didn't know the folks, but sucks nonetheless. Going with R.V. was the cheaper way to get the good bored-out throttle body

yeah and he had a nice AFPR with gauge kit reasonably priced too. IDK if SPR Performance will take a TB and bore it for less than their $530 one but, keep in mind it comes with flow matched injectors, new calibrated TPS and AIC, "ultimate mods" including shaved throttle blade shaft, FP spring of your choice, yada yada yada.

IMHO, buying used may have issues with sensors and balanced injector flow. The throttle shaft may be wonkey too. If someone's gonna go through the expense of building a 383, why cheap out now? Just saying

 

[Blazer 383]

My blazer is a 92

 

[Blazer 383]

The tb comes with a warranty, but I will check the butterfly shaft for wear.