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What pressure do I set my 30# SVO's at?

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Old May 27, 2001 | 03:36 PM
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MATEOZ28's Avatar
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From: Fresno, CA, USA
What pressure do I set my 30# SVO's at?

Here are my current mods.
58mm Throttle body
450HP *crank* 383 STROKER dynoed with stock TPI setup and no Roller Rockers.
All the freebies
1.6 Crane Gold Roller Rockers
TPIS Big mouth manifold ported
SLP runners extrude honed
24-26lb injectors
Holly in tank fuel pump
SLP 1 3/4 coated headers
3 1/2" header back exhaust
4thgen 1998 WS6 rearend w/323's
Competition Engineering adj. drag shocks
Custom LCA's
Eiback drag springs with airbag
Lakewood adj. panhard rod
Energy suspension polyurithane everything
Stage 3 700R-4
SLP 24-2800 stall
17x9.5 front ZR-1's
17x11 rear ZR-1's
powder coated white
With Dunlop SP2000 tires
Phantom Fuel pressure/tranny temp guages on dual pillar.
Hotchkis tie rod sleeve
KYB front rear sway bars
ASCD SS Hood
SSM subframe connectors
Edelbrock Strut Tower Brace
Throttle body airfiol
AFPR TPIS
MSD 6A box
MSD 8.5 Super Conductor wires
MSD High Vibraton Coil
Ported plenium
Flowmaster muffler *not sure what model*
Low temp fan switch
Low temp thermostat
Tranny cooler
Oil cooler
Goodyear Hi Miler cooler hoses
200 NOS kit *not installed til I learn about this **** though*
Skulte wheel spacers in front
Modified airbox
Lakewood drag struts 90/10's
V-6 springs in front
Hypertech underdrive pully's
K&N filters <---100HP @ least right there)
Accel cap rotor
Accel ignition module *I think thats what it is*
RedLine synthetic fluids, and water wetter cooling ****.
4 wheel disc
Several custom proms made by Performance Resource
AIR CONDITIONING from a donor car
323 gears
I know I'm forgetting alot of ****.


Anybody wanna burn me a chip? I need one because I....uh....broke mine

[This message has been edited by MATEOZ28 (edited May 27, 2001).]
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Old May 27, 2001 | 05:36 PM
  #2  
MATEOZ28's Avatar
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From: Fresno, CA, USA
I just read somewhere we were supposed to set our fuel pressure at a lower setting because of the difference in size.
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Old May 27, 2001 | 06:24 PM
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Willie's Avatar
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From: Tucson, Arizona USA
Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
What size injectors did you have and at what pressure did you run those to obtain 850mV O2 sensor voltage? With this information, I can look up what pressure you need to be at with your new 30#ers.

------------------
Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig): 12.57 @ 111 mph.
Former Paxton (6-psig) & former 50-hp nitrous: 12.04 @ 114 mph.
Current ATI D1SC (Initially 10-psig): Projecting high 11's.
Future ATI D1SC (15-psig): Gotta catch them pesky 26-psig boosted TTA's!!

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.
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Old May 28, 2001 | 02:33 AM
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MATEOZ28's Avatar
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From: Fresno, CA, USA
<font face="Verdana, Arial" size="2">Originally posted by Willie:
What size injectors did you have and at what pressure did you run those to obtain 850mV O2 sensor voltage? With this information, I can look up what pressure you need to be at with your new 30#ers.

</font>
Damn man! I dont know what your talking about please teach me to check what you need to know to help me



[This message has been edited by MATEOZ28 (edited May 28, 2001).]
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Old May 28, 2001 | 08:24 PM
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Desert86Roc's Avatar
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He basiclally wants to know how you determined that you needed 30lb injectors.

You only need to go with larger injectors if your current ones are operating at such a high duty cycle, or pressure that they cant keep up, or in danger of locking. You would have found this out by tuning your fuel pressure by monitoring your 02 sensor voltage at WOT.

------------------
Mike Metzler (Desert86Roc)[*] Webmaster: SpeedWorldMotorplex.com[*] Click Here For 86 IROC 305 TPI (406 build in progress) Page

ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.365 @ 86.785 mph (uncorrected, headers, no NOS)
&lt;&gt;&lt;
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