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Id start by checking for vacuum leaks and verifying the timing curve

Id start by dropping or raiseing the fuel pressure to 5.5 lbs and verifying your getting a minimum of a 1/2 gallon a minute unrestricted flow

Id start at all four jets #70

Id install a NEW power valve and ID buy several,if your carb uses them, so I could play/exchange/test


start here, theres no sence in guessing

http://www.themotorbookstore.com/holley-carburetors.html

http://www.themotorbookstore.com/motuhocavo2.html

http://www.themotorbookstore.com/holley1.html

http://www.bob2000.com/carb.htm

http://www.mortec.com/carbtip1.htm

http://store.summitracing.com/partdetail.asp?autofilter=1&part=HLY-36-181&N=700+115&autoview=sku

http://www.professionalequipment.com/extech-high-temperature-infrared-laser-thermometer-501-ds-42545/infrared-thermometer/

http://www.centuryperformance.com/vacuum.asp

http://www.carcraft.com/techarticles/carb_tuning/

heres where
a infared non-contact thermometer helps diagnose mixture problems very quickly, but youll need one that reads into the 1400F range for the headers for quick diagnoses

http://www.professionalequipment.com/xq/ASP/ProductID.3461/id.22/subID.177/qx/default.htm

temperature range from -58 to 1832°F

I use this one :grin: (above) and youll need to learn how to read plugs (this may help)

http://www.chevytalk.org/threads/showfla...rue#Post1448415

heres A/F

http://www.rbracing-rsr.com/rsrgauge.htm

http://www.mummbrothers.com/SRF_Stuff/Secrets/Driveline/Air_Fuel.htm

http://www.airfuelmeter.com/english/

http://www.innovatemotorsports.com/products/lm1.php

http://thedynoshop.net/prod01.htm

http://www.dawesdevices.com/airfuelmeter.html

http://fastrides.com/articles/DoItYourself_AirFuelRatio_Gauge.html

http://www.fuelairspark.com/Products/Information/AirFuelMeter.asp

http://www.3barracing.com/product_3.htm


a few places to look for plug/ignition info

http://auto.howstuffworks.com/ignition-system.htm

http://www.ngksparkplugs.com/techinfo/spark_plugs/techtips.asp?nav=31000&country=

http://www.gofastzone.com/techtips/sparkplugs/sparkplugs.htm

http://www.acdelco.com/html/pi_plugs_ident.htm

http://www.autolite.com/framer.cgi?page=http://www.autolite.com/products/racing.htm

http://members.uia.net/pkelley2/sparkplugreading.html

http://www.atlanticjetsports.com/_techtalk/00000005.htm

http://www.strappe.com/plugs.html

http://www.babcox.com/editorial/cm/cm59910.htm

http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf

http://www.nightrider.com/biketech/spkplghnbook.htm

http://www.tsrsoftware.com/sparkplug.htm

http://www.gnttype.org/techarea/engine/plugs.html

http://www.dansmc.com/sparkplugs1.htm

http://www.ngksparkplugs.com/techinfo/spark_plugs/overviewp2.asp

http://www.pajjakid.com/ubipa/sparkplugs.htm

http://www.edelbrock.com/automotive/sparkplugs.html

http://www.bullittarchive.com/Maintenance/Sparkplugoverview/

http://www.powerarc.com/sparkplug.htm

http://www.carcraft.com/techarticles/64378/

http://www.wakularacing.com/TechnicalInfo.htm

http://www.geocities.com/MotorCity/Flats/3877/spark.html


http://www.rmlautomotive.com/ignition.html

http://www.bgsoflex.com/auto.html

http://ourworld.compuserve.com/homepages/JET_AV8R/Vision/Ignition/CDI.HTML

http://www.howstuffworks.com/ignition-system.htm

http://auto.howstuffworks.com/ignition-system1.htm

http://www.familycar.com/Classroom/ignition.htm

http://www.motocross.com/motoprof/moto/secontent/seign/ignprin/ignprin.htm

http://www.northwestautorepair.com/ignitionsystem.htm

http://www.boyleworks.com/ta400/psp/distcurve.html

http://www.chevytalk.com/tech/index.html


heres other options

http://www.davessmallbodyheis.com/


http://www.msdignition.com/

http://www.proformparts.com/catalog/distributors_GM.html

http://www.atlanticspeed.com/store/MSD Chevrolet Distributors.asp

http://www.holley.com/HiOctn/ProdLine/Products/IS/ISD/ISD.html

www.performancedistributors.com/gmdui.htm


Spark plug /ignition info

http://www.edelbrock.com/automotive/sparkplugs.html

http://www.ngksparkplugs.com/apps/car_truck_suv/default.asp?nav=60000&country=US

http://www.strappe.com/plugs.html

http://www.applink.net/cct/tips/plugwires.html


http://www.acdelco.com/html/pi_plugs_ident.htm

http://www.atlanticjetsports.com/_techtalk/00000005.htm

http://www.ngkspark.com.au/spark_plug_cross_ref_chart_index3.htm


http://www.strappe.com/plugs.html

http://www.babcox.com/editorial/cm/cm59910.htm

http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf

http://www.eric-gorr.com/techarticles/sparkplugs.html

http://www.gnttype.org/techarea/engine/plugs.html


http://www.tsrsoftware.com/sparkplug.htm

http://www.racinghelp.com/read_spark_plugs.html

http://www.ngksparkplugs.com/techinfo/spark_plugs/overviewp2.asp

http://www.gofastzone.com/techtips/Spark...20Reference.htm

http://www.geocities.com/zgarage2001/adv...01/advance.html

http://www.hotrod.com/techarticles/43300...harticles/43300

http://www.centuryperformance.com/vacuum....com/vacuum.asp

http://www.custompistols.com/cars/articl...tion_timing.htm

http://chevyhiperformance.com/howto/4567...com/howto/45673

http://www.lmengines.com/Ignition_Timing...tion_Timing.htm

http://www.73-87.com/garage/hei.htm]http.../garage/hei.htm




http://www.bgsoflex.com/auto.html

OPTISPARK info

http://www.gmhightechperformance.com/tech/0310htp_optispark/

http://www.charm.net/~mchaney/optisprk/optisprk.htm

http://www.fierolt1.com/lt1_95_up_OptiReplace.htm

http://www.noid.org/~muttvette/opti.html

http://www.gulicks.com/vette/projects/opti/index.html

http://www.houston-f-body.org/tech/optispark/


http://www.dynotech-eng.com/dynaspark.htm

http://www.corvetteclinicinc.com

http://www.corvettefever.com/howto/16758
 

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I havent read all that yet, but i propose a sticky so it is easy to find.


I love this forum.
 

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3,770 Posts
Very Nice, great info that will help a lot of others.:thumbsup:
 

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Wow! Great research! Thanks!
 
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