Found a Holley TBI for $5........

[stew86MCSS396]

The link I posted...I forgot to mention that the op probably smoked the first fastener down then couldn't get the remaining two aligned/started so he said he had to enlarge two holes. That is false, three mounting screws align just fine.

[CDeeZ]

Yeah more than likely lol. I haven't bolted them together yet, but the three bolt holes line up just fine. Really even two would be enough to hold it in place. The throttle body I ran on this truck in the past before I built this 355 for it was just that way. One of the three injector pod holes was stripped out. I'm excited about the prospect of using this Holley TB with a GM injector pod.

I have never seen one of these TBs in person until I stumbled upon this one. Man the throttle bores are massive compared to a stock TB.

[C2500]

I have never seen one of these TBs in person until I stumbled upon this one. Man the throttle bores are massive compared to a stock TB.[/QUOTE]


What’s “Massive” are they really that big?

[stew86MCSS396]

Same as your bbc one in terms of bore size.

[CDeeZ]

I believe stew is correct! I have never seen a BBC TB in person. I find from a little searching that a BBC TB should be 645 CFM and the Holley one here is rated at 670 CFM, so not much difference.

The 4.3, 5.0 and 5.7 TB measures 1.680" on the bores.

This Holley unit measures 2.042" on the bores.

[tamperedchevy]

very nice, I have an extreme EFI throttle body bore on my 5.7 throttle body and it measures 1-31/32 of an inch. they say it flows 720cfm.
*pretty sure I got it from extreme EFI.

[CDeeZ]

very nice, I have an extreme EFI throttle body bore on my 5.7 throttle body and it measures 1-31/32 of an inch. they say it flows 720cfm.
*pretty sure I got it from extreme EFI.

Cool. Got any pics of your setup? I have been having fun stomping ass around town in my sleeper truck with the S475 6.0 build I finished not too long ago. This K5 I'm also working on I decided to keep it SBC and TBI. I considered doing another LS swap since that turned out so well but I decided to keep this truck a SBC with TBI for two reasons. One is that TBI is what I learned on. The other reason is that I really want to see just how far I can push a TBI system. It's fun for me becuase TBI was never intended to be a high performance application, and most people are pretty ignorant of what they can do.

Ditch the stock puny TBI cam, corked up exhaust, sort out the tune, and either port the 193 heads or swap heads and you have a really strong engine. Since there are forged flattops in this engine I built I would love to also boost this one!!! Found a Whipple supercharger on my local Craigslist but it got away!!!

terima kasih banyak

Where the fuck are all the mods? Somebody needs to dust off the banhammer around here.