carb tune??

[grumpyvette]

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%2D36%2D181&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 (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%20Chevrolet%20Distributors.asp

 

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

 

http://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

[Guest VietVet]

Wow GrumpyVette:

This is a great Answer to someone's Question.. A lot of good Info..

I have a cheap $50 Infrared thermometer for AC and Brake Rotor's

But what is the application for an Infrared Thermometer that goes to 1850F ? Is something burning?

 

Cheers VietVet68 - Going back next year after 40 Years. Tourist

[grumpyvette]

"But what is the application for an Infrared Thermometer that goes to 1850F ?"

 

its a quick way to isolate cylinders that are not firing or cylinders running LEAN, clinders that misfire tend to run cooler, cylinders that run lean tend to run hotter, and all your cylinders should run reasonably similar temps, generally youll be looking for header temps between 1000F and 1200F anything way outside that temp range tends to point to a problem