Well I finally got my New 350 ordered from SDPC. I was going to just put on a TBI manifold from edelbrock because most everything bolts up to it and I thought I could get a little extra out of it by boring it to 2".( 1 11/16 vs 2" arguments notwithstanding) Well, I guess I can't bore it out according to edelbrock and the people on this board so I would like to know what has to be modified on the performer carb manifold w/EGR part number #3706.

1)What is the best Carb to TBI adapter? Will it clear my stock hood?

2)Will the stock fuel lines bolt up or do they require mods?

3) Will the stock throttle bracket and hardware bolt up?

4)Where does the heater hose go? Mine comes out of a fitting on the passenger side rear.

5) Where does the brake vacuum booster line go? Mine goes to a fitting in front of the TBI on the drivers side. The vacuum fitting on the back side behind the TBI is currently
used for my cruise control sensor ( I know, who needs cruise control).

I am sure some of these questions are stupid, but I don't have a good picture of the manifold where I can see everything. I will continue to search the archives but in the meantime I would sure appreciate anyones help and thoughts on this........bob


------------------
91 camaro RS L03 convert,
t-5, ultimate TBI mods,TBI spacer,SLP 1 5/8 headers,
3"cat back, 3.42 torsen posi,alston SFC's,Global West LCA relocation brackets, edelbrock STB

 

I'd rather have the stock type TBI and the edelbrock TBI intake than a 2" bore TBI and a perfomer intake.

------------------
-Tas
'89 Formula WS-6
[soon to have Hooker 1-5/8" 50 state legal headers installed]

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz

 

Hey Rsilver, let me get some pix for ya and I'll post them later tonight/tomorrow. I built a 385 using a carb Performer manifold.

1) I got the adapter from Holley for $60; shouldn't be a problem clearing the hood.
2) Hard to say, using the stock TBI you could have issues. I ran almost a full inch worth of spacer with my TBI and got the fuel lines to work. Since I'm going with a Holley 670 this next time I can use regular fuel lines pushed on to barbed hose fittings so it's not an issue here. Supposedly if you get the fuel lines from a full size truck (91-92??) with TBI they are braided stainless flex and will screw right in. If you get any info on this PLEASE share it!
3) I'm going to find this out shortly. There are bolt holes back there, I just don't know if that's what they are for. If not, I'll be breaking out the JB Weld.
4) I have a fitting on the front of the manifold next to the therm housing for that.
5) There is a hole in the rear of the manifold for that or several ports on the TBI itself. You could also "T" off of another.

I'll get back to ya,
Steve

------------------
Steve's Trans Am Temple

 

Tas, I am curious to know your thoughts on why you would rather use the TBI intake/stock
TBI rather than the 2" TBI on a carb intake.
I read a thread and arguments on both sides of this and I would much rather use the TBI intake cause it makes life easier but 500CFM+- is kinda short for a mild performance 350 isn't it? Sure like to know your thoughts and I will check that thread again to see what you said If i can remember what the subject was. Thanks........bob

 

The throttle cable will need some fabrication to extend it a bit. The TV cable should make it, mine did. I also had to "tweak" the fuel lines a bit. Nothing extreme, just a few degrees to get them to thread smoothly. I got the holley adapter from jegs for $49. I am still using the stock TBI, so some things may fit different with a 670.

------------------
305 TBI
700-R4
L98 cam, 1 5/8 headers, 2 1/2 y-pipe, 4bbl edelbrock performer, holley adapter, open element K&N, afpr, flowmaster catback, MSD coil, accel wires cap & rotor, vette servos, shift kit, 2000 stall converter, TC lockup switch, 3:42rear, all the free mods and some I left out.

 

Let's see if this "Zing" online photo album works...


Steve

------------------
Steve's Trans Am Temple

 

Edelbrock RPM with holley adaptor and holley TB:<a href="http://host10.hrwebservices.net/~vladid/jon/Image24.jpg">Click here</a>

------------------
, Jon (350 TBI! getting 23mpg highway)
91 Red RS w/grey int, sq stereo (Alpine v12, kicker solo, MB quart premium etc)AIM: JPrevost

• Holley 670 TB unit w/ 1/2" spacer/adapter
• Edelbrock RPM vortec intake
• 350ho 330hp vortec crate motor
• 8" harm. balancer
• Stewart stage 2 water pump w/160 thermo
• SLP tri-y headers to full 3"
• Rebuilt trans w/ SLP shift kit
• Centerline 16x8's all around
• 36/24 mm sway bars
• Full poly bushings, even motor mounts
• SLP LCA and panhard
• Alston SFCs
• Edelbrock 3 point STB
• Global west steering brace aka wonderbar
• Eibach pro kit springs
• Bilstien high perf. struts and shocks
• All this and I still have AC

My websiteAny questions?

 

I am always amazed at this site and the people on it. I ask a few questions and I get answers and EVEN PICTURES!!!!!!
Unbelievable.......thanks very much.......bob

 

That's not whay I said/meant. I just don't like the performer. I think the stock TBI and edelbrock TBI intake would be better than a 2" TBI and performer intake. Another carb intake would make it a totaly different comparison. For a 350+ engine I'd use a single plane carb intake or a Edelbrock Performer RPM intake modified in a certain way that I've been planning.


[This message has been edited by Tas (edited April 10, 2001).]

 

Tas, ok, I get what you are saying. Well, I gotta run an egr, so that limits my choices. I think weiand makes a carb manifold that has provisions for EGR. Thanks for your thoughts. This Whole question of what intake/TBI combo to use is clear. I guess it like cam choices to some extent.............bob

 

Tas is incorrect. There is dyno proof that a Performer with adapter plate is better than the Edelbrock TBI manifold. DON'T ask me how I know this, I will not/cannot tell. If I told you who did the testing, you would not believe me AND they surely would not verify... Please, don't bring this up again... I WILL tell you that some of the problem with the TBI manifold is the location of the TBI in relation to the pad AND some more of the reason is the "box" that is on the TBI manifold causing nasty turbulence/rolling at speed.


Get the Performer EGR manifold (same as Performer but w/EGR provisions, not sure of the P/N, go to Edelbrock.com) These manifolds can support in excess of 350hp WITH EASE!!! I made 245hp (engine dyno) with VERY MELLOW cam, Performer, Holley plate, 1-11/16" TBI!!! Use a Holley 2" TBI plate as it correctly positions the TBI unit (toward the "front") to avoid rear cylinder fuel loading. email me, if you like but I don't get to it until the weekend.

EDIT: just saw JP's post/picture. EXACTLY, my man!!!

[This message has been edited by FastBroker (edited April 11, 2001).]