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carb tune, where too start

grumpyvette

Well-known member
Joined
Apr 17, 2001
Messages
841
Location
Loxahatchee, FL, Palm Beach co
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.co...hermometer-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
 

MikeMc71

Well-known member
Joined
Apr 30, 2007
Messages
100
Location
Tucson, Arizona
Corvette
1970 Roadster, 1971 LT-1, 1971 Coupe
Good info...someone needs to sticky this!!!
 

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