Deleting Mechanical Fuel Pump

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Also if you where to go with in tank TBI pump you would also need a regulator.
Best go with a good inline pump. And a 390cfm holley. And you will be good to go.
 
I think the Holley Red is a low pressure inline pump no regulator needed. JEGS also has there own branded version of the Holley inline pump that i have used in the past cheap and runs about 7psi.

And for a carb on a v6 if your looking for drivabillity i dont think you will be really happy running a 4bbl ive been down that road. Had a s10 a few years ago 4.3 low miles that the previous owner put an intake and 500cfm edelbrock didnt matter how i tuned it the thing ran like garbage. Quadrajet same results. It wasnt untill we put on a Dualjet that the motor really woke up and came to life
 
The 3.8s gain about 10 HP with a Buick V6 Qjet. The V6 Qjet also improves drivabillity due to the primery bores being smaller than the bores in a Djet. However it must be a Qjet that is calibrated for a V6. Most 4bbls are calibrated for V8s and are too much for a V6. The Buick V6 Qjets for example have tiny idle tubes that are smaller than you can commonly get like .028, most Qjets for V8s have at least .032 or bigger. As I said before, it is alot of work for little gain. All factory Qjets are calibrated for certain factory engine setups while aftermarket carbs are generic calibrations for many different brands of V8s.

Inline pumps run hotter and can vibrate the whole car if not placed right. That is besides cutting and splicing the metal fuel lines, intank pumps require no fuel line splicing and no mounting issues either.

If the computer harness isn't cut, you could just grab a new V6 ECM out of the junkyard, you could even get a complete CCC harness, it is easy to swap the harnesses out and cheaper than going non CCC.
 
A direct bolt on 4 barrel intake for the 3.8 is the one off of the 4.1 buick, that is if you can find it. The edlebrock intake makes no more power than than the stock one UNLESS you use the edlebrock "power package" with it. Whatever intake you use, you must limit the how much the secondaries open or WILL overfuel the engine and do nothing but make black smoke, have less power at full throttle, and be washing the cylinder walls down with raw fuel 🙁 . What most people don't understand about the naturally aspirated, carbed 3.8 is that it had reached it's maximum efficiency to that point with the current technology of the day. Hence the reason the next generation went multi-port injection, dis, balance shafts, redesigned heads. While almost everyone at the time was going to fuel injection of some sort, no-one, at least domestically, was doing distributor-less ignition, balance shafts, tall port heads, sequential injection, low resistance oil pumps, etc. Of course my opinion is biased as I grew up with Buicks as that was the ONLY car my grandfather would own OR drive 😀 . The Buick V6 was designed, from the beginning, from the time it was released in the early 60's, sold to AMC, bought back from AMC, to be a reliable, efficient people mover. With a few exceptions, that is all it was designed to do. And, IMO, it did it supremely all the way until it was replaced 😢 with the junk-*ss 3.5/3.6/3.9. I am not trying to discourage you from playing with your engine but just trying to give you some insight. Sorry about the long write up but I tend to ramble on when my meds kick in. :rofl:
Btw. you can use a block-off plate from a Grand National, which, when you look at it looks just like one from a chevy small block turned up side down.
 
Clone TIE Pilot said:
The 3.8s gain about 10 HP with a Buick V6 Qjet. The V6 Qjet also improves drivabillity due to the primery bores being smaller than the bores in a Djet. However it must be a Qjet that is calibrated for a V6. Most 4bbls are calibrated for V8s and are too much for a V6. The Buick V6 Qjets for example have tiny idle tubes that are smaller than you can commonly get like .028, most Qjets for V8s have at least .032 or bigger. As I said before, it is alot of work for little gain. All factory Qjets are calibrated for certain factory engine setups while aftermarket carbs are generic calibrations for many different brands of V8s.
And where might I acquire a Q-jet compatible intake and a V6 calibrated Q-jet?
 
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