Ok, I finally pulled the trigger on a 383 for my ROC. I thought I had an outline on what I needed\wanted...I bought the 350 spark control, 30lb injectors so far. I'm wanting to get the HSR, a new fuel pump, and I thought a 58mm TB. As for the TB, I was looking at what would be better/if there was REALLY a difference (BBK vs. Holley). After reviewing many threads, reading pass the arguing and putdowns, it really seems that this is a useless pursuit to even upgrade from the stock 48mm. My motor is (advertised) as 425HP\460ft-lbs tq. So is this something I should forget getting (the TB) for my application?
Also, trying to nail down a fuel pump...seems like everyone said "get a Walbro 255lph". After reading up on threads about these, it looks like they got sold out, not as dependable, quarkey (need to keep fuel in tank), loud, etc. I also read a racetronix was a better choice, more dependable, no quarks, etc. I'm looking for the path of least resistance on this swap, and want to learn from your experiences so I'm not repeating probs. that you guys have encountered before (if I can help it!!) Any feedback appreciated! Any other things I might have missed?? Let me know.

 

ttt

 

Can't shed any wisdom on TB's or injectors or anything (I run a carb). However, when it comes to fuel pumps I recommend the Holley blue pump. It's a 'pusher' pump that handles flows comparable to what you've listed. I've had it on my car for years now with no issues, mounted right outside my fuel tank.

 

When I say "pusher" pump I mean that it is meant to be mounted close to the fuel tank and "push" fuel to the engine

 

So that would be an inline fuel "pusher"? I am keeping this FI so wouldn't that initially be more work than a drop in, into the tank. Never messed with these, don't know what to expect. Do you change the pick-up and return in the tank, take everything else out (original).? Like I said I'm looking for the easiest way to go about this and move on to the next part of the swap, if you know what I mean, but I want it to be dependable and the right way for the long run. Thanks!

 

Right. It has the pusher unit at the tank and a regulator up in the engine bay. You actually just remove everything from the tank, or leave it in there (the pump will pull through the old pump, though it's not recommended).

Idk which is actually easier, because both involve dropping the tank.

Maybe someone here can give insight to the world of in-tank pumps.

 

It would be quite a bit of work to install a blue pump on there. Extensive mods to the pickup tube and such. I have a blue pump on my 66 chevy PU and its the loudest fuel pump I've ever heard (if your concerned with noise you don't want a blue pump). I have a walbro 255 and have had any trouble with it. I don't notice it being any louder than the factory pump was. I never let any in-tank pump get low on fuel. They all will burn up eventually doing that.

 

True, they are quite loud, that's another thing to consider

 

Wow, putting an in-line pusher pump in an original EFI application - not seeing how that could be justified.

My Walbro 255 can be heard - until the engine starts...

Had it in since August 2010. Daily driven, regularly raced. Never a hiccup.

 

I have learned the hard way that in tank Delco pumps are not built to factory specs where they have crossed models to satisfy the needed volume of car.Basically saving them money by not having to build so many models any longer.Where Delphi still does build to factory specs for in tank models in volume and pressure.The thing is for in line pumps is they very well might have the pressure rating,but don't supply the volume.To draw threw a dead in tank pump is a really bad idea.It certainly will effect the volume and pressure of the inline pump and kill the inline pump is short order.The important msg here is to know not only the pressure your working with and regulate it with a return line,but also know the volume of the pump your working with.

The other thing you have to do in a high volume/high pressure fuel injection fuel pump,do not use regular fuel line rubber hose for any splices.They sell special fuel injection rubber hose for that use/splices.In fact for any in line pump I suggest you use the fuel injection hose.The regular hose doesn't hold up where the fuel injection hose does.