[Dragncar]

Whittmore used to like the Performer for 350s since the runners were a tad smaller. I have had great luck with a Tomahawk on iron heads. Since its a ported HSD it makes sense.
Stock iron 68-72 manifolds are just early SD intakes with Q jet pattern so they are great.
One of the best worked iron intakes done by SD was a EGR unit, one that let the butterflies open all the way. Dave said it does not make much difference. It ran 10s. I plan on chopping up a EGR unit since I do not want to mess with the intake that came on my 69. Do the Cliff/SD thing.
I would like to try and make a Q-Jet intake work with a Holley and no adapter.
If it has a cam Warrior beats them all.

[Will]

A FiTech is basically just a fancy carb. Fuel is still being dispersed into the airflow above the throttle plates just like in a carb so I can't see the wet-flow characteristics being significantly different.

This combo calls for a dual plane intake because of their superior low- and mid-range torque characteristics. Any of the dual plane choices would be fine, including a regular Performer. Bigger cam and bigger cubes would rule out the Performer in favor of a factory intake, modified factory intake, or RPM.

I've run Performers on three different engines, one of which ran into the mid 12s on street tires with 3.23 gears. I'm sure that intake was holding that engine back, but all of those engines ran fine and had good torque & response. it will accept either square- or spread-bore carbs (or a FiTech) with no issues.

[steve25]

With stock number 16 heads you will not get the needed wide Ass power band out of any intakes other then a stock non EGR iron, or a Performer .

A one inch open spacer on a Performer works far better then cutting down the divider.

[Half-Inch Stud]

400 Pontiac is a cool engine to drive around; dual-plane, hi-compression, stick and F-body or light A-body.

455 is my choice for full luxury A-body, full boogey F-body, provide OVERDRIVE is included.

I've had the Dual-Plane on the 9.0:1 compression 469 for the past 2-years and can say it feels fantastic for 3rd gear pull-away from stop, and throttle mash in OVERDRIVE at highway speed to "pass" prevailing traffic.

Come on folks the most thrilling dynamic change we can do to our Pontiacs is add Overdrive, then you will NEED the Dual-Plane. My 469 ran fine with the Single-Plane Torker I in OVERDRIVE, then swapped to Dual-Plane to notice no degradation. I think Passing power was improved with Dual-Plane; pullls like a matched system.

These statements are the fundamental motivation to assemble my Spare 455 with the Spare 4L80 to complete a Spare driveline to...get another project!!

[Half-Inch Stud]

QUOTE::::: I'm just about done with the 400......and need to choose an intake.

Here's the combo: 400 +.030. 9.76:1 SCR 16 heads
Going into a '67 Firebird with 3.54 gears..... be grocery getter, weekend cruiser, and the track once or twice a year.

============================
Cam Style: Hydraulic flat tappet.......Duration at 050 inch Lift: 219 int./227 exh

2 MAJOR comments:
1: What OVERDRIVE Trans do you have to negate the 3.54:1 race gears, that i also had to endure?
2: Cam 050 Duration seems too small: perhaps 6* to 10* more like 225-230 int & 230/236 exh would get the right feel & and ping-free sound on 87 Octane.

[grandam1979]

It’s a stock rebuild read his build info.

[HWYSTR455]

Dual plane with a throttle body EFI depends on which throttle body EFI throttle body, and has to do with where the MAP sensor port is.

My understanding is the FI Tech has a port that is compatible with a dual plane, and with 'other' throttle bodies a 1" space is preferred.

Cutting a notch in the divider might help, but the location of the notch in relation to the MAP port in the body would be the deciding factor.

So, it's best to be safe and use a spacer.

Regarding the engine in question, since the cam is on the small side, I don't think you're going to see much of a difference with any of the dual planes, even the 'regular' performer.

Personally, a mild port match on a 'regular' performer would be my choice over an OE intake, since you have the choice of either a spread bore or square bore carb, as well as being lighter, and probably less work, since OE intakes usually require considerable clean up. Hardware can be an issue too with an OE, and then there's the 'gasket thing' too. Some have the EGR stuff too.

I ran regular performers on mild to semi-mild 326-400s many times and had no 'issues'. Once you start going into a more performance type build, then IMO I wouldn't run an OE or performer.

A Performer RPM would run fine and probably what I would run on OP's build, since it leaves room for improvement/upgrades, and looks better when you pop the hood.


.

[yahooskidoo]

I'll sell you a 1970 oem intake.

[Speargun]

Originally Posted by Half-Inch Stud

2 MAJOR comments:
1: What OVERDRIVE Trans do you have to negate the 3.54:1 race gears, that i also had to endure?
2: Cam 050 Duration seems too small: perhaps 6* to 10* more like 225-230 int & 230/236 exh would get the right feel & and ping-free sound on 87 Octane.

A 4L80E is on the list for a future upgrade, but the TH400 & 3.54's haven't been a problem so far. Most of my driving is around town so I can live with what I have.... for now.

You may be right on the duration. I was trying to keep this a mild, slightly better than stock build since it's a 557 block, but I ended up with more compression than I originally wanted. The block was decked more than I thought ( a lot more) and I didn't find out until after I installed the new pistons. I guess that's what I get for relying on my memory of machine work from 30 years ago.

[Speargun]

I think that I'll try the Performer intake to start & see how that does since I have a couple laying around. I've read that the P4B isn't that great and the HSD is probably a little too much. The only factory intake that I have is a 9778816 off of my old '65 389 Bonneville and I'm not sure how/if it would work on this combo.

Maybe one day after I have a few miles on it, I'll get squirrely and put the Warrior on it.

[tooski]

After reading the many threads on intakes, for my two 400's I will go to stock modified ( the running one has a T2) The 461 roller has a T2 port matched.

[74Grandville]

Originally Posted by David Jones

I wonder if the FI Tech would prefer one over the other.

This is why i chose the Torker 2. also it's a good intake. with those rods/pistons and gears, no reason not to spin it.

[455rebel]

Not to hijack, but which alum intake mimics the stock 72 the best, just for weight savings?

[Skip Fix]

The plain Performer with a Q jet may need some grinding on the plenum divider for the big Q jet secondaries if not using a spacers.

[Formulajones]

Originally Posted by 455rebel

Not to hijack, but which alum intake mimics the stock 72 the best, just for weight savings?

The repop HO and RAIV intakes do that not only in performance but in looks, and air cleaners and other stock pieces fit as they should. Best part I've found with them is they have a separate heat cross over so you can still run your divorced choke if so equipped, yet it keeps the heat out of the intake itself. Has been working fantastic in cold and hot weather driving.

I've run both the factory iron and the repop RAIV piece and can find no difference in performance at the track, at all, despite all the complaints of casting flash and port alignment claims.

[jonathonar89]

FiTech or other TBI setup....I’m all for a Torker 2 or Holley intake on this debate

[Formula8]

Originally Posted by jonathonar89

FiTech or other TBI setup....I’m all for a Torker 2 or Holley intake on this debate

^^^What he said^^^