wtt edelbrock 650 for a 750 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

frost89434 · 03-27-2004, 03:10 AM

Now that I put a big block in my truck I will need a bigger carb. I would like to trade a very good 1 year old edelbrock 1406 650 cfm for a 750 cfm. Would prefer a edelbrok but would consider a holley too. Any help would be appreciated. Thanks JIM

P.S. Could send pics upon request.

veltex · 03-27-2004, 12:29 PM

if you dont get any takers, you might try calling edelbrock and find out just how far your 650 can be jetted up, I have heard the 750s arent very good for some reason.

Bill72BB · 03-27-2004, 12:32 PM

I,ve ran both on my BB ,Jetted and Rodded the 1406 ,1407 is stock ,only noticed small difference around town ,and in Gas milage ,if gas keeps going up I may put the 1406 back on.
JMO

bigjimzlll · 03-27-2004, 12:35 PM

not to be a dick..but the 1406(1405) are 600cfm...not 650cfm

frost89434 · 03-27-2004, 01:03 PM

thanks for the input. I was debating on rejetting it. JIM

Bill72BB · 03-27-2004, 02:22 PM

Jim; Just pulled out the book ,here are the setting I have my 1406 at when it was on the truck ;
Rods 73/42
primary .098 ( stock jets)
Sec .101

I also came as close to these timing figures as I could with the HEI.
GM factory manual. The specs are :- 0 degrees @ 930 RPM; 2 @ 1260 RPM; 16 @ 2400 RPM and 30 @ 4400 RPM. Vacuum advance specs are 0 degrees @ 8" hg and 20 degrees @ 17" h.g. Initial ignition timing is 8 degrees advance @ 600 RPM ( idle speed).
... Above specs are from GM 1971 Chevrolet Truck Service Manual.
... Another GM reference is the 'GM/AC/Delco Tune-up Specs Manual # SD-100. These specs call for a 10-13 degree centrifugal advance @ 2000 RPM and a total advance ( vacuum & centrifugal ) of 28 to 35 @ 2000 RPM...... When I installed my unit about 10 years ago; I used an adjustable timing lite and set the timing to 35 degrees @ 2000.........No problems and was well satisfied with the engine performance.............

frost89434 · 03-27-2004, 02:32 PM

Bill: Thanks alot for your help. It is much appreciated. I have a jet kit in the garage. As soon as my mouth quits hurting from having all of my teeth pulled I'll give it a try. Thanks again

03-27-2004, 03:10 AM	#1
frost89434 Registered User Join Date: Nov 2001 Location: sparks, NV Posts: 1,141	wtt edelbrock 650 for a 750 Now that I put a big block in my truck I will need a bigger carb. I would like to trade a very good 1 year old edelbrock 1406 650 cfm for a 750 cfm. Would prefer a edelbrok but would consider a holley too. Any help would be appreciated. Thanks JIM P.S. Could send pics upon request. __________________ 68 short fleet with 71 front clip 2wd jaguar blue 99 chevy ext cab shrtbed z71 loaded 99 chevy swb fleetside(daily driver) Sparks, Nevada

03-27-2004, 12:29 PM	#2
veltex Registered User Join Date: Oct 2003 Location: Idaho Posts: 257	if you dont get any takers, you might try calling edelbrock and find out just how far your 650 can be jetted up, I have heard the 750s arent very good for some reason. __________________ beater 65 gmc at the moment

03-27-2004, 12:32 PM	#3
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,980	I,ve ran both on my BB ,Jetted and Rodded the 1406 ,1407 is stock ,only noticed small difference around town ,and in Gas milage ,if gas keeps going up I may put the 1406 back on. JMO __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

03-27-2004, 12:35 PM	#4
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	not to be a dick..but the 1406(1405) are 600cfm...not 650cfm __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

03-27-2004, 01:03 PM	#5
frost89434 Registered User Join Date: Nov 2001 Location: sparks, NV Posts: 1,141	thanks for the input. I was debating on rejetting it. JIM __________________ 68 short fleet with 71 front clip 2wd jaguar blue 99 chevy ext cab shrtbed z71 loaded 99 chevy swb fleetside(daily driver) Sparks, Nevada

03-27-2004, 02:22 PM	#6
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,980	Jim; Just pulled out the book ,here are the setting I have my 1406 at when it was on the truck ; Rods 73/42 primary .098 ( stock jets) Sec .101 I also came as close to these timing figures as I could with the HEI. GM factory manual. The specs are :- 0 degrees @ 930 RPM; 2 @ 1260 RPM; 16 @ 2400 RPM and 30 @ 4400 RPM. Vacuum advance specs are 0 degrees @ 8" hg and 20 degrees @ 17" h.g. Initial ignition timing is 8 degrees advance @ 600 RPM ( idle speed). ... Above specs are from GM 1971 Chevrolet Truck Service Manual. ... Another GM reference is the 'GM/AC/Delco Tune-up Specs Manual # SD-100. These specs call for a 10-13 degree centrifugal advance @ 2000 RPM and a total advance ( vacuum & centrifugal ) of 28 to 35 @ 2000 RPM...... When I installed my unit about 10 years ago; I used an adjustable timing lite and set the timing to 35 degrees @ 2000.........No problems and was well satisfied with the engine performance............. __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

03-27-2004, 02:32 PM	#7
frost89434 Registered User Join Date: Nov 2001 Location: sparks, NV Posts: 1,141	Bill: Thanks alot for your help. It is much appreciated. I have a jet kit in the garage. As soon as my mouth quits hurting from having all of my teeth pulled I'll give it a try. Thanks again __________________ 68 short fleet with 71 front clip 2wd jaguar blue 99 chevy ext cab shrtbed z71 loaded 99 chevy swb fleetside(daily driver) Sparks, Nevada

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