2.3 Quad4 FAQ

[LargeFish]

I'm going to start this by posting some links to some good web resources for the 2.3 enthusiast.

Quad 4 parts garage (http://users.skynet.be/nvmygtz/ref.htm)

Quad4 DOHC site (http://www.geocities.com/motorcity/8353/)

DIY Cylinder Head porting (http://www.sa-motorsports.com/diyport.htm)

Quad4 Head gasket R&R (http://www.veryuseful.com/GM/tech/headGasketTemp/)

Rebuilding the Quad4 by Doug Anderson (http://www.babcox.com/editorial/ar/ar49935.htm)

Beretta GTZ dyno results (http://www.beretta.net/behind_the_wheel/dyno_results.htm)

RPO Codes (http://tlentz.oldsgmail.com/rpotext.txt)

MSD DIS II Ignition install (http://members.shaw.ca/johnz24/howto/msd.html)

NY Jbody library site (http://www.ny-jbodies.org/forum/library.asp)

------------------------------

Parts sources, I believe these all came from Scott (Fbod383):

Performance parts.
Cams:
Engle Cams www.englecams.com
CompCams camhelp@compcams.com
Mantapart www.mantapart.com
Crane E-mail them ONLY customerservice@cranecams.com

Heads:
Mantapart www.mantapart.com

Crank, Block, Rods:
Pauter www.pauter.com
Crower www.crower.com
GM (stock parts) or once again Mantapart.

Headers:
No one makes them. You would have to have one custom made. Or the stock '89-92 HO exhaust manifold flows best. (Manta sells a ported version w/ optional bigbore downpipe)

Chips, ECM/ECU:
Superchips www.superchips.com
GM (HO-W41) www.gmpartsdirect.com
Mantapart www.mantapart.com
Jet www.jetchips.com
S-AFC www.apexi.com

Valve Springs:
Mantapart www.mantapart.com
Crane Part # CRN-99846-16 www.summitracing.com

Valves/Valve Guides:
www.sivalves.com

Pistons
Ross www.rosspistons.com
Wiseco www.wiseco.com
JE Piston www.jepistons.com

-----------------------------------------

Stolen from an FBOD383 post:

Getrag Gear ratios:

W41
1st - 3.50:1
2nd - 2.05:1
3rd - 1.38:1
4th - 1.03:1
5th - 0.81:1
FDR - 3.94:1

Pre-92
1st 3.50:1
2nd 2.19:1
3rd 1.38:1
4th 1.03:1
5th 0.72:1
FDR - 3.61:1

92-94
1st - 3.50:1
2nd - 2.19:1
3rd - 1.38:1
4th - 1.03:1
5th - 0.72:1
FDR - 3.94:1

[LargeFish]

Berreta net 1993 2.3L specs (http://www.beretta.net/how_to/b-tech/2.3_specs.htm)

FAQ intended for 2.3 newbies (http://www.angelfire.com/il2/insig2/quad4r.html)

[LargeFish]

Another great find from who else, but FBOD383...

Click me (http://hostingprod.com/@aa1car.com/library/ar396.htm)

[LargeFish]

Thanks to quadswap for this link:

http://midwestcylinderhead.com/

Another link I found posted by quadswap elsewere that has some good 086 head pics to use as guides when you do porting and also some info. on an adjustable FPR, flywheels & more:

http://www.ekconline.com/Quad4/Quad4.html

[LargeFish]

Again, found posted buy Fbod...

Cylinder Heads Intl (http://www.headsonly.com/)

Spy posted this - FDP makes a 62mm throttle body...

FDP performance (http://www3.sympatico.ca/fjpeters/)

[LargeFish]

Thanks to Martog (Murph) for this link:

http://www.kitcarmag.com/techarticles/73858/index.html

Some good info. on building a hybrid.

[josh]

Quad Faqs (http://www.quad4forums.com/forums/forumdisplay.php?forumid=29)

[LargeFish]

Here's a top-end engine pic that Josh posted on his forum.

[LargeFish]

Here's an engine pic I trimmed up and resized a bit...

[josh]

Originally posted by LargeFish
Here's an engine pic I trimmed up and resized a bit...

is that so I wouldnt lose it again :)

[Matt95GT]

2.3 GM Performance part numbers (from GM Perf. catalog) (http://www.gaownersclub.com/forum/showthread.php?s=&threadid=69924)

[Matt95GT]

Originally posted by 93gagt3300
lastest part numbers::: YOU BETTER SAVE THESE.........

22548437 PISTON, STD 10:1

22548438 PISTON, 25MM OS, 10:1

12360096 PISTON, 50MM OS, 10:1

THESE PISTONS COME WITH THE PINS......

i had to call my gm contact to find out if these were still available. they are.

[Matt95GT]

94-95 OBD1.5 Quad 4 PCM sensor I/O and pinout (http://www.gaownersclub.com/forum/showthread.php?threadid=73610)