Torker II Intake ID

[Arns85GT]

You bet the Camaro is a better intake

The Fiero guys are often using the iron head 3.4 to upgrade their engines.

I believe the whole 3.4 Camaro intake manifold flows better, not just the top.

Interesting to note though, that the fastest 3.4 pushrod Fiero has been one with the Edelbrock/Holley setup, not MPFI. The Edelbrock manifold flows at 410 cfm and the Holley 4 barrel at 390 cfm.

Arn

[Doubt_Incarnate]

i was just wondering if anyone had some real pictures of the edelbrock intake setup, i've never realy seen one.

[Arns85GT]

look here

You are looking for the 3789 model, so scroll down the page a bit.

Arn

http://www.edelbrock.com/automotive_new/mc/manifolds/chevy_v6_perf.shtml

[Doubt_Incarnate]

thats cool, i havent seen the 4bbl top yet, but what does it look like without the top, just the base?

[Arns85GT]

Sorry, I don't have a pic of just the base, but it is flat as a pancake with 6 ports, a thermostat hole, holes for your temp and coolant sensors, and some bolt holes.

[Doubt_Incarnate]

i was just wondering... i was thinking of trying to make a custom intake for my 2.8, play around with the variable length runner type of setup.

[IXLR8]

Here is the lower Edelbrock intake

[Doubt_Incarnate]

sweeet, thats pretty much what i expected from the description, thanks

[Kreb]

Here's pics of the Edelbrock and Offenhauser:






Here's the folder: http://usera.imagecave.com/Kreb/manifolds/

[Doubt_Incarnate]

thats interesting, i thought the edlebrock was advertized as a dual plane, but it sure doesnt look like one, more like a tunnel ram. but that offenhauser looks like the better choice for low end torque since it looks like a dual plane, and thats the only one of those i've seen.

[Kreb]

I've never run the Torker in my car, so cannot speak to it's performance characteristics. The Offy is a higher quality casting, and does seem to crank out the low-end, although after 5,000 RPM its ramps off pretty fast.

In a poor state of tune I generated 180RWTQ at 3000 RPM with the Offy and 390 Holley.

Edit: The Torker is single plane. The Offy is dual. No question about it.

[RacerX11]

The plenum divider in the Torker makes it a dual plane intake. It splits the two halfs of the engine, so 3 cylinders pull from one half of the carb, the other 3 cylinders from the other half of the carb. A single plane intake would have a common plenum under the carb, allowing all 6 cylinders to pull from all 4 carb bores.

The Offy is different from a true dual plane (they advertise it as a Dual Port intake). It has two seperate sets of runners for each cylinder, with the longer, low speed runners pulling from the carb primaries, and the shorter, higher rpm runners pulling from the carb secondaries.

Marty

[Kreb]

OK, I may have my terms wrong here. I can see how the divider, coupled with the varying port sections creates diferent flow charateristics for each bank of cylinders, but IMHO the OFFY is a much more elegant solution. I don't have the technical chops to claim one's superiority over the other, but as I said previously, the OFFY does also appear to be better made.

[Arns85GT]

Torker characteristics

I've been doing alot of work with the Torker. It started with the dual plane 4 barrel intake as pictured above. My 4160 Holley had a carb fire, and I was persuaded by a local speed shop to use a 2 barrel with a conversion spacer, allegedly for better low end torque and smoothness. ....... WRONG

I now have the Torker II with dual plane intake under a 4160 4 barrel. It has good bottom end and lets the engine rev happily to 6000. My engine is the Fiero 2.8 with the GM HO cam, and ported heads with 1.6 roller tip rockers.

What I learned along the way is that for low end torque on a small v6 you need dual plane. If the engine vacuum signal goes to 2 barrels at low rpm, the vacuum signal is too low for correct fuel metering in the carb. That is the reason Edelbrock does not recommend any spacer and more particularly an open spacer.

When I was having problems with the Torker II, I went looking for the Offy intake and could not find one to buy. Thanks for those very good pics. The pieces look new. If somebody has a source to buy them, please share. From what I see it is a more advanced design and worth looking at.

[Doubt_Incarnate]

i think the offy is a "once upon time" item. but t does look to be the better peice. but for making a custom setup it looks like the edelbrock base would will the workability contest.