Anyone tried one of these universal 4-cylinder quad-throttle-body kits?

I first saw them on eBay. Universal engine-management computers are also available to manage the EFI (individual port injectors) and ignition timing (management computer is programmed with laptop.)

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[This message has been edited by TaffGoch (edited 12-06-2003).]

There's someone around here useing something similar on a V6 Fiero. Would be very cool, but looks like it would be difficult to tune. Neat idea tho.

Very interesting. Who makes a compatible intake manifold?

Can you post a link to these, I am interested... not for my fiero but this looks like it has potential

Kyle

From what I've read, some folks are using the Cannon 4-cyl manifold, as the throttle body kit is specifically designed to replace 2 dual Weber carbs (45DCOE.) However, the intake manifold is fairly simple, and I've included a link to one description of someone who devised their own.

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Throttle body kits, Hawk computers, etc.:

"EFI Hardware" http://www.speed-technology.com/efi_main_page.html
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Quad throttle body kit:

"Tweakit - EFI Hardware Quad Throttle Body Kit" http://www.tweakit.net/throttle_body_kits/web_4cyl_quad_throttles.htm
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Engine Management computer:

"Simple Digital Systems" http://www.sdsefi.com/index.html
(4-cyl halfway down the page)
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Manifold (someone who made their own):
http://www.group3j.com/throttle_body_manifold.html

very nice, very expensive... I want some!

Heres another site with a few more ideas...
http://www.twminduction.com/Home/Home-FR.html

Enjoy

quote Originally posted by TaffGoch: From what I've read, some folks are using the Cannon 4-cyl manifold, as the throttle body kit is specifically designed to replace 2 dual Weber carbs (45DCOE.) However, the intake manifold is fairly simple, and I've included a link to one description of someone who devised their own. _________________ Throttle body kits, Hawk computers, etc.: "EFI Hardware" http://www.speed-technology.com/efi_main_page.html _________________ Quad throttle body kit: "Tweakit - EFI Hardware Quad Throttle Body Kit" http://www.tweakit.net/throttle_body_kits/web_4cyl_quad_throttles.htm _________________ Engine Management computer: "Simple Digital Systems" http://www.sdsefi.com/index.html (4-cyl halfway down the page) _________________ Manifold (someone who made their own): http://www.group3j.com/throttle_body_manifold.html

Thanks for this info. Now I know what my Indy with the superduty will be sporting. It currently has dual sidedraft webbers on it!

Rob D.

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The Dirty Rat
Chopped, dropped and just plain NASTY!
383 Stroker MPFI with NOS
2.5" Drop
11" Brakes
17" Revolutions
RCC Coilover Suspension
Updated June 29 '03 www.dirtyratracing.org

I've been thinking that an early N* manifold could make a good base for two of those kits...

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'87 Fiero GT: Northstar, Getrag, TGP wheels, rear sway bar, rod end links, bushings, etc.
'90 Pontiac 6000 SE AWD: Leaking ABS unit fixed, load levelling rear suspension fixed, still slow

$$$$$$$$$$$$$$$$$$$$$$$$$$$

I'm not sure what you gain other than looks.
The stock log style Quad 4 intake looks pretty unrestrictive to me and I think that the Mantapart guys get something like 230 HP from the Quad 4 in road racing and all they use is a bored out throttle body.

Not all of us have Q4's...

What I like is the potential for straight-through air flow. With a set of headers, and some port polishing, the iron duke will flow better than just about any other arrangement I can think of.

If anyone plans to pursue this, I want to inform you of one caveat that I read. Since the engine management computer generally uses a mass air flow sensor, it can be problematic that you've got 4 intakes. One alone will not provide the air mass data that the computer needs to properly set the air-fuel mixture. That's the reason for the (graphite) plenum box depicted at the top of the thread. Putting the MAP sensor at the intake of the box will reportedly average the air-flow and fix this potential deficiency. Plus, if you plan to use a turbo or supercharger, you'll need a similar arrangement...

...and yes, all of them seem rather pricey!

[This message has been edited by TaffGoch (edited 12-07-2003).]

I have an EVM SD-4 intake that is similar to that. Mine is mechanical injection but I hope to convert it. If any of you saw the intake on the IMSA racecar at the 20th it should look like that. Just like a Kinsler or hilborn set-up.

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The Stickman

http://members.tripod.com/~TheStickman/SnTsFieros.html

quote Originally posted by The_Stickman: I have an EVM SD-4 intake that is similar to that. Mine is mechanical injection but I hope to convert it. If any of you saw the intake on the IMSA racecar at the 20th it should look like that. Just like a Kinsler or hilborn set-up.

I'm not familiar with the EVM intake, although the Kinsler is depicted in Pontiac's Super Duty parts book:

Stickman - I visited your webpage, but the images don't display. Is the EVM similar to the depicted Kinsler?

Since the throttle bodies at the top of the thread are so expensive (but appear simple in construction) I'm wondering whether I could fabricate my own. Only simple machining of flat aluminium stock appears to be necessary. I would obviously purchase the injectors and engine management computer. Has anyone experience with simple throttle bodies like these? Am I missing something?

To start, I would find a simple throttle body in a junk yard, to examine closely. Since all they handle is the air flow, they're not as complicated as the injectors, etc. (Oh, yeah, I'd buy and modify a throttle-position-sensor.) The fuel rails have to handle high-pressure fuel, so I'd probably scavange them from the junk yard, too - modifying to fit the new application.

The descriptions I've read for the engine management computers - and their programming - seem to indicate that they have a fairly wide latitude in the settings you can customize. Hopefully, it's wide enough to use custom-fabricated throttle bodies - without the MAJOR expense of the throttle body kits at the top of the thread. Am I delusional?

[This message has been edited by TaffGoch (edited 12-09-2003).]

Actually it looks exactly like that. As for making one I thought you coud make a simple tuned port arrangement with a SBC throttle body. I really do need to update my page. Not sure why the pics have dropped off. I didn't change anything lately.

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The Stickman

http://members.tripod.com/~TheStickman/SnTsFieros.html