It's been a while since I've looked at this sort of thing, but are there any alternatives to the GMPP TBI intake? It seems very pricey relative to both standard TBI intakes and carbureted Vortec intakes.

I don't care about the EGR thing so much, but I don't want to go the whole hokey, bolted-together-adapter-plate route, either.

I remember hearing rumors on here some time ago of a mythical Vortec TBI manifold that could be found in 1996 2500 and 3500 G-vans- did that ever pan out?

 

Edelbrock makes a Vortec 2 barrel carb intake that one could add an adapter plate to.

http://www.summitracing.com/parts/EDL-2912/

 

The GM one is the only one I know of. You will be messing with adapter plates with anything else. I was going to use vortecs with my truck but decided I didn't want to fool with them to get it all working. I wanted to keep my TBI and EGR.

 

+1 on this cheaper and will probably get a little bit more power out of it.

 

Grab a regular edelbrock rpm performer for vortec heads or similar knock off and then add a 4bbl to tbi plate. The victor Jr manifold is designed for 3k to 7k rpm operation not good for tbi

This or similar should work

http://www.ebay.com/itm/Edelbrock-71...483d9c&vxp=mtr

Here is a knock off version

http://www.ebay.com/itm/SBC-CHEVY-VO...60da7b&vxp=mtr


Then get an adapter

Here are a bunch

http://www.tdperformance.com/Carburetor-to-TBI-Adapters

http://www.ebay.com/sch/items/tbi+ad...=445962_446022

 

Or talk to this guy

https://www.thirdgen.org/forums/engi...ec-intake.html

 

Says who???? Victor Jr 2bbl is IMO the absolute best 2bbl TBI intake out there. You will make the same torque as a dual plane and alot more HP.

 

There's a guy in the for sale section that is selling a few of them and at a good price. I just bought a GM Performance intake for mine and it was 300 used 385 to 405 new. Or you could go the adapter plate which I didn't know about till I already bought the intake and sold the performer that was on it.
I'll sell you my GMPP intake for $250 plus shipping. The only problem with it is the dist. hole is a little wallared out on one side. (I'll send you a picture if your interested) That should't make a difference. I have cleaned and bead blasted it and plugged the un-nessory holes, and even made a block off plate for the EGR if you don't wan't it.

 

is anyone still selling vortec heads redrilled for the standard intake?that and a new chip seems to be the best way to get by the smog police.

 

I have a pair of brand-new, still in the boxes iron aftermarket Vortec-style heads that use the 6-bolt manifold pattern.

Shipping will suck.

PM for details.

 

Patriot does with their 2151 heads

 

You think so? I wonder if once the neccessity for a strong vacuum signal to each venturi is removed, the single and dual planes become much more equivalent. In my case, I will never see the high side of 5800, so I am curious if the Victor Jr. is really as good at say 1250-4500 rpm

 

My throttle response was just as good at 1,200-1,500 rpm as the dual plane and that was with the torque converter clutch locked up, in OD, pulling 5,300 lbs of G-van.

 

Fast355...new here but though I'd ask you since your a Texas boy like me..what adapter plate do u need with the Victor Jr intake? .thanks man.

 

For vortec applications uses EDL-2912. The photo below is for Vortec heads. EDL-2912 is drilled for square bore and for model 2300 Holley carbs used in Ford applications.

http://www.edelbrock.com/automotive/...ds/sb/2912.jpg

There are a lot of adapter plates out there that can possibly work, but there are several design details that must be taken into account:

www.ihpartsamerica.com%2Fforums%2Ffuel-injection%2F4263-faq-parts-required.html&ei=x-JDVNKtFc2bigL7tIDYBA&bvm=bv.77648437,d.cGE&psig=AFQjCNHbWV71m-4thdLG1YCB6mrspUtNIw&ust=1413821455145954

1) Holley Part# 17-47
https://rspimages.holley.com/17-47.jpg?width=583

2) DCtrumpet TBI to 4150 square bore adapter plate. eBay item number: 231311057274

http://i.ebayimg.com/00/s/NjAzWDU2OQ==/z/eUQAAMXQfj9SMzuY/$T2eC16JHJIUFHHkJoB46BSMzuYk6+!~~60_57.JPG

I like #2 - it is CNC machined from 1/2" 6061 AL and has plenty of thickness for bolts to engage into. No vacuum leaks, looks great.

//RF

 

If you have to use an adapter plate with the 2bbl intake, as you would with a 4bbl intake, how is the 2bbl intake superior?

 

Flow....

 

A 2bbl Victor Jr flows better than a 4bbl Victor Jr?

 

It has a smaller plenum and due to the fact it was designed for a 2bbl carb better distributes the mixture than a 4bbl intake.

 

The adapter plate I ran is no longer offered unfortunately. It was made by Holley for their 2" Projection TBI units and had a water passage inside it. I plumbed it inline with the heater core after the heater control valve. In cold weather hot water would flow through the adapter and warm both the TBI and intake manifold.

This unit is similar but not water heated.

http://www.summitracing.com/parts/hly-17-47/overview/

 

But I thought with EFI, you wanted the largest plenum possible?

 

Not when you have a wet manifold.

 

What comparative evidence are you aware of, 2bb v 4bb Victor Jr?

 

Having run and tuned both on the same setup.

 

I used the GMPP intake on my Vortec conversion. Retained EGR and AIR systems. I have to say I am very happy with the results. Used the 89 Cop car injectors and had a chip burned to make it all work together. Runs really smooth. Nice idle, great power...no regrets.