1992 TBI - Weiand 144ci Carb Blower

[joe_and_jeep]

I have a Weiand 144 Carb'd roots style blower and wanting to put it on my 1992 TBI 350 and keep the TBI. Building a carb to TBI adapter will be easy. What do I need to do for a FMU/Fuel Management? I am keeping the long block stock. I might swap to a better flowing stock head but thats it, so I am hoping I dont need anything too fancy. I know there is some doo hickey that increases fuel pressure with boost by restricting the return line. Dunno who makes it or if its really worth a darn. And what about the map?

Oh yea, this is in a 1992 Chevy Caprice. But I am having a hard time since apparently no one supercharges a TBI Caprice. Its easier just to swap in a LT1. But my Caprice shares the same motor and seems its more popular in Full Size Chevy Trucks.

Going back to searching.... When I do this, I'm definately going to make a detailed thread for future searches.

[whitelightnin92]

the tbi will feed it if you keep it mostly stock. youll need to raise fuel pressure or use 454 injectors and youll definately need a tune. it will be easy to tune because you wont have positive manifold vaccum

[Swole1]

Great! Wanting to get a vortec longblock and swap everything to a 400 maybe a LT4 prod cam then weiand 142/144 on it in my 95 X-cab, :daddy:

[Jameslleary]

I think that 144 is 50 State legal.
Best thing you could do is install it, and then get a laptop and Datamaster, and work with a good tuner to get your PROM programmed correctly.

[Swole1]

wanna say the 142 is also state legal

[whitelightnin92]

i would reccomend the EBL from dynamic efi for ease of tuning. it will make things so much simpler

[Swole1]

That's what I hear be interesting to see what kind of numbers, it would put down...

[whitelightnin92]

well with the positive displacement blower you will have instant TQ as soon as you open the throttle. thats the nice part of the blower. you might be upset by the actual numbers but they really dont matter if it performs. on a competely stock engine you may only make 300 hp but the tq would be serious.

[Swole1]

Probably in the 500's? Just PM'd ya bout a different project

[whitelightnin92]

yea tq would be mid 500s probably

[Swole1]

NICE! clean out your box bro

[whitelightnin92]

got it

[Swole1]

gotta clean out that box man, I gotta an update on the flow numbers of the heads, would just post it up here, but I'm sure somebody would have something to say about it's not in the right thread or whatever, FYI looks like its small port vortecs for the win!

[whitelightnin92]

post it. and box is cleared. darn forum doesnt let you have hardly any messages

[bert7116]

call holley direct tech line there is also a spacer that water flows through between the tbi and the blower you can possibly buy the prom from them and misc peices had this set up on a 93 rcsb great bottom end but fell off on the top towed very well though good luck

[Swole1]

Alright well sold the whole 95 project Idea and bought me a 98 vortec Z71 (money is tight and found the vortec for cheaper but more miles) gonna see if I cant just stuff a SHP DART 400 short block in it and convert all the vortec stuff over, heard something about 24# poppets was wondering where to get those, eventually swapping a marine intake maybe see if I cant maggie it later. As far as my 93 w the 396SS idea, small port vortecs(bowtie) seem to have the best flow numbers all the way around, w the heads we discussed (thought about the weiand 142 or whippling later it but may give a nitrous works TBI kit on for starters)... what type of new numbers do you think I can come up w on the 2 separate motors and what are your thoughts about em?, both are ideas and money tight but I do have a plan and that's how it all starts :cheer: