QUAD 4 FAQ's - A Community for the GM Quad 4 and Twin Cam Engines

Josh · #1 04-06-2003, 05:56 PM

Originally posted by FBOD383 on the old boards

http://www.babcox.com/editorial/ar/ar49935.htm

Dyno results
http://www.beretta.net/behind_the_w...no_results2.htm

Transmission
http://www.drivetrain.com/transill_hm282.html

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

Josh · #2 04-06-2003, 06:09 PM

Intake Manifold

Exhaust Manifold

LGO vs LD2 crank pulleys

086 Cutaway

Josh · #3 04-06-2003, 06:10 PM

95 and SOHC Intake Manifold

89-94 LG0 and 90-94 LD2 Intake Manifold

Fbod383 · #4 04-09-2003, 02:52 PM

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

edit: here is a little more info (found on 60degreev6.com)

Quad 4 Getrag 89
1st...3.50
2nd...2.19
3rd...1.38
4th...1.03
5th...0.72
FDR...3.61

1990
1st 3.50
2nd 2.19
3rd 1.38
4th 1.03
5th 0.81
Axle 3.61

1991
1st 3.77
2nd 2.19
3rd 1.38
4th 1.03
5th 0.81
Axle 3.61

1992-1994
1st 3.50
2nd 2.05
3rd 1.38
4th 1.03
5th 0.72
Axle 3.94

1991-1993 W41
1st 3.50
2nd 2.05
3rd 1.38
4th 1.03
5th 0.81
Axle 3.94

Isuzu L-Body
1st 3.73
2nd 2.15
3rd 1.33
4th 0.92
5th 0.74
Axle 3.83

V6 Getrag All years J and L body
1st 3.50
2nd 2.05
3rd 1.38
4th 0.94
5th 0.72
Axle 3.61

W Body V6 HM282
1st...3.77
2nd...2.19
3rd...1.38
4th...1.03
5th....0.81
FDR...3.61

Fbod383 · #5 04-16-2003, 02:31 PM

Unichip is a fully programmable engine management system which allows 408 optimized fuel and ignition parameters to be channelled through a vehicle's standard Engine Control unit (ECU) to deliver maximum power, optimized driveability and improved fuel economy.

Unlike other performance chips, the Unichip is not a replacement pre programmed "one size fits all" chip. Unichip works in harmony with the standard ECU and is mapped live on your engine to obtain the safest maximum power, torque and optimum fuel economy.

Why should I install a Unichip to my car?

The most obvious reason is to increase engine performance. Significant gains in torque and power across the entire RPM range are possible. In addition, the engine will be smoother, deliver greater response and maximize fuel efficiency at all RPM and throttle positions. A second reason is to harness the performance value of engine and exhaust modifications.

Standard engine management systems are not programmed to cater for exhaust headers, cat back exhaust systems, high flow air cleaners, performance cam shafts or larger turbochargers and intercoolers.

Fbod383 · #6 04-16-2003, 02:32 PM

Dealers

Josh · #7 05-03-2003, 11:42 PM

Quote:

As Posted by Grouch

Some great Quad 4 articles
Tried posting this in the FAQ section, but couldn't. Not sure where to put it anyways so I will just put it here and let yall play with your little "mod" buttons to move it if it fits better somewhere else.

This page has some good articles and information on the quad 4's, such as:

2.4 LD9 Twin Cam Info
2.4 Spec's
2.4 Camshaft Secrets Revealed!
MSD II Install
2.3 HO Intake Manifold Install
A'PEXi AFC Install

2.3 Quad 4 Info
2.3 Quad Spec's (93')
Quad 4 Part Numbers
Quad 4 Basic's
More Quad 4 Tech
Quad 4 Cam's
Quad 4 Head's
Quad 4 Exhaust

5 Speed Transmission's Info
Pics of Isuzu 5 Speed
Getrag 00' 5 Speed VSS View

http://www.ny-jbodies.org/forum/library.asp

some interesting reading.

Fbod383 · #8 07-04-2003, 09:54 PM

http://hostingprod.com/@aa1car.com/library/ar396.htm

Fbod383 · #9 08-20-2003, 10:23 PM

REGRIND01646

F-232/428 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND00913

F-242/448 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01473

F-242/448.32 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND00914

F-252/468 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01469

F-256/410 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01501

F-256/410.08 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND02054

F-260/450 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4 VALVE 2.3 LITRE 4 CYL.

REGRIND02339

F-260/450.08 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4 VALVE 2.3 LITRE 4 CYL.

REGRIND00604

F-270/465 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE 4 CYL DOHC 4 VALVE 2.0 LITRE

REGRIND01650

H-212/395 INTAKE

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND00408

H-222/430 INTAKE

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4 VALVE 4 CYL. 2.3 LITRE

REGRIND00766

H-222/430.30 INTAKE

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4 VALVE 4 CYL. 2.3 LITRE

REGRIND01535

H-232/402 INTAKE

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND00597

H-232/430 INTAKE

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4 VALVE 4 CYL. 2.3 LITRE

REGRIND00931

H-232/460 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01024

H-242/480 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01582

H-252/480 INTAKE

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND02048

H-256/456 INTAKE

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4 VALVE 2.3 LITRE 4 CYL.

REGRIND01647

F-232/428 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND00912

F-242/448 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01474

F-242/448.32 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01470

F-246/390 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01502

F-246/390.28 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND00915

F-252/468 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND02340

F-256/410.28 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4 VALVE 2.3 LITRE 4 CYL.

REGRIND00605

F-260/450 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE 4 CYL DOHC 4 VALVE 2.0 LITRE

REGRIND01651

H-212/395 EXHAUST

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND00409

H-222/430 EXHAUST

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4 VALVE 4 CYL. 2.3 LITRE

REGRIND00767

H-222/430.30 EXHAUST

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4 VALVE 4 CYL. 2.3 LITRE

REGRIND01536

H-232/402 EXHAUST

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND00598

H-232/430 EXHAUST

HYDRAULIC SPECIAL

OLDSMOBILE DOHC 4 VALVE 4 CYL. 2.3 LITRE

REGRIND00932

H-232/460 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND01025

H-242/480 EXHAUST

MECHANICAL SPECIAL

OLDSMOBILE DOHC 4-VALVE 4 CYL. 2.3 LITRE

REGRIND02049

H-256/456 EXHAUST

HYDRAULIC SPECIAL

Fbod383 · #10 09-11-2003, 06:38 PM

LG0

Bore in: 3.62
Stroke in: 3.35
Head cc's: 48
Gasket Thickness in: 0.047
Deck Height (Put .0001 for zero deck) in: 0.01
Dish or Valve Pocket [-] or Dome [+] cc's: -5.19
Number of Cylinders: 4

LD2

Bore in: 3.62
Stroke in: 3.35
Head cc's: 48
Gasket Thickness in: 0.047
Deck Height (Put .0001 for zero deck) in: 0.01
Dish or Valve Pocket [-] or Dome [+] cc's: -8.85
Number of Cylinders: 4

LD9

Bore in: 3.54
Stroke in: 3.70
Head cc's: 60
Gasket Thickness in: 0.047
Deck Height (Put .0001 for zero deck) in: .0001
Dish or Valve Pocket [-] or Dome [+] cc's: -2.6
Number of Cylinders: 4

http://www.rosspistons.com/calculator.php

Josh · #11 10-02-2003, 09:39 PM

http://www.oldschoolcavy.com/Cavy%20info/quad_mods.htm

Very knowledgable.

TheWhiteKnight · #12 10-13-2003, 10:49 PM

I deciphered all the numbers except #40, if anyone knows M me, and I'll update it.

TheWhiteKnight · #13 10-13-2003, 10:51 PM

Manual Transmission Differential Exploded View

TheWhiteKnight · #14 10-13-2003, 10:52 PM

DOHC Quad 4/TC Top Side Exploded View:

Josh · #15 11-04-2003, 10:35 PM

From GooieB http://www.teamforwardmotion.com/tfm...ral_tuning.htm