![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
|
![]() |
#1 |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,835
|
At what RPM does your 350 SBC idle?
Rather than staring WWW III asking more timing advance questions, let me just ask you this:
When your V8 350 cubic inch small block chevy is warmed up properly and purring like a kitten, what is your tachometer reading? What RPM is it happy at? Since the manual splits the idle adjustments into Automatic and Manual, please let us now which one you got an auto or a stick, thank you very much. |
![]() |
![]() |
![]() |
#2 |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,835
|
Re: At what RPM does your 350 SBC idle?
apologies I accidentally dropped this in the wrong forum, it was meant for the 73-87 section, but if you don't mind please provide your feedback as well
|
![]() |
![]() |
![]() |
#3 |
US Army Veteran
![]() Join Date: Nov 2008
Location: Central Texas
Posts: 1,049
|
Re: At what RPM does your 350 SBC idle?
350 crate motor at 260hp, idle set at approximately 650-700 rpm.
__________________
1972 C10 Highlander - The making of a daily driver |
![]() |
![]() |
![]() |
#4 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,218
|
Re: At what RPM does your 350 SBC idle?
Same engine as Thaman. Manual trans. 3-2 carbs. It idles real nice about 700 RPM.
|
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Sep 2013
Location: Litchfield,il
Posts: 75
|
Re: At what RPM does your 350 SBC idle?
Truck isn't together right now but the 350 in my camaro idles right here.
http://youtu.be/JMm3QcF9-R4 |
![]() |
![]() |
![]() |
#6 |
Registered User
![]() Join Date: Oct 2009
Location: Phoenix, AZ
Posts: 475
|
Re: At what RPM does your 350 SBC idle?
350/ TH350 idles at about 550 in park, and 400 in drive with A/C on.
As an aside, a couple of years ago I was very close to not passing emissions at idle, so I slowed down the idle to 450 in neutral for my recent test. It was OK but not as smooth as normal. Solved the emissions issue, though.
__________________
1971 C10 Longbed, 350/TH350 |
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Jul 2006
Location: Central PA
Posts: 12,201
|
Re: At what RPM does your 350 SBC idle?
sounds like it should be in the Engine Section...
700 or so seems nice
__________________
The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" |
![]() |
![]() |
![]() |
#8 |
Registered User
Join Date: Dec 1999
Location: Mid NE USA
Posts: 2,212
|
Re: At what RPM does your 350 SBC idle?
700-750
Ron
__________________
Member #111 68 C-10 ![]() 70 ![]() 76 Jeep CJ-5 Help Support the Board: http://67-72chevytrucks.com/vboard/payments.php He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors. Thomas Jefferson |
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Jul 2012
Location: Ft Wayne Indiana
Posts: 1,204
|
Re: At what RPM does your 350 SBC idle?
Mine is not consistent, I think the mech. advance in my distributor is sticky. Anyway most times it's 1000 but sometimes I can get it to drop to 750.
__________________
71 K20 64 GMC mud truck |
![]() |
![]() |
![]() |
#10 |
Registered User
![]() Join Date: Apr 2014
Location: Lafayette, LA.
Posts: 105
|
Re: At what RPM does your 350 SBC idle?
350/ TH350 idles at about 550 with AC off
__________________
"They Don't write songs about Hondas " 1972 C10 "Ole Red--blood, sweet & beers" USMC 1989-1997 1st Anglico ![]() |
![]() |
![]() |
![]() |
#11 |
Registered User
Join Date: May 2011
Location: Northern Calif.
Posts: 3,697
|
Re: At what RPM does your 350 SBC idle?
350/350, 650 rpms, timing @ 10, smooth 17ins of vac. Running good.
|
![]() |
![]() |
![]() |
#12 |
Senior Member
![]() Join Date: Aug 2014
Location: Sandy, Oregon
Posts: 2,376
|
Re: At what RPM does your 350 SBC idle?
My 1972 with 350/350 combo idles at about 800 in park and 700 in drive, my brothers 1967 idles at 700 in park and 600 in drive and my dads 1969 350/700r4 with quite a few upgrades idles low at 600 and in part at 500 or below with a lot of lump from the cam.
__________________
My dad always says that HEI distributers are pointless... •1972 Custom/10 Deluxe. My first truck and I've had it since I was 7. Tilt, tach, AM/FM, 350, deep dish rally's, original paint and an increasing amount of NOS jewelry. It's always taking my money.. •1967 c10 with tach, dropped 3/5 on deep dish rally's •1972 Cheyenne Super. Sold |
![]() |
![]() |
![]() |
#13 |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,835
|
Re: At what RPM does your 350 SBC idle?
thank you all I think I will split the difference of what the manual says and the feedback I have received 600 ~ 900 and set mine back to 750 where it was before I replaced the points distributor with the H.E.I.
|
![]() |
![]() |
![]() |
#14 |
Registered User
Join Date: Jul 2011
Location: Farmville, Va
Posts: 3,026
|
Re: At what RPM does your 350 SBC idle?
I set mine at 700
|
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Apr 2016
Location: San Diego California
Posts: 31
|
Re: At what RPM does your 350 SBC idle?
1972 C-20.. stock 350/350.. in park, idles at about 650 warmed up.. 550 in gear.. just got a new Quadrajet yesterday, same idle rpms in gear but sputters at 550 at a stop... 3100-3200 cruising rpm at 65mph...
|
![]() |
![]() |
![]() |
#16 |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,835
|
Re: At what RPM does your 350 SBC idle?
|
![]() |
![]() |
![]() |
#17 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
|
Re: At what RPM does your 350 SBC idle?
Bone stock cam, 650 in Neutral, 550 in Drive.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
![]() |
![]() |
![]() |
#18 |
Registered User
Join Date: Nov 2007
Location: Indianapolis
Posts: 1,162
|
Re: At what RPM does your 350 SBC idle?
800-900
|
![]() |
![]() |
![]() |
#19 |
Registered User
Join Date: Dec 2013
Location: Lampasas, Texas
Posts: 234
|
Re: At what RPM does your 350 SBC idle?
my truck idlesat 650 when warm and in park 350/ 200-4r.
just finished the swap on trans and loving the 2100 rpm at 70mph |
![]() |
![]() |
![]() |
#20 |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,835
|
Re: At what RPM does your 350 SBC idle?
|
![]() |
![]() |
![]() |
#21 |
Registered User
Join Date: Dec 2013
Location: Lampasas, Texas
Posts: 234
|
Re: At what RPM does your 350 SBC idle?
I had a 3 speed standard trans and I was above 3000 rpm at 70
|
![]() |
![]() |
![]() |
#22 |
Registered User
Join Date: Jun 2014
Location: Lake Tapps Washington
Posts: 386
|
Re: At what RPM does your 350 SBC idle?
Holley 650 and a comp hyd. 268 no stall converter, just shy of 1000 in park and about 650-700 warmed up in gear.
__________________
1967 Chevy CST 10 1969 Chevy C/20 Longhorn 1969 K10 Suburban 1972 Chevy Cheyenne Super 10 turned K30 (sold) ![]() |
![]() |
![]() |
![]() |
#23 |
Senior Member
![]() Join Date: Oct 2013
Location: Santa Paula, CA
Posts: 600
|
Re: At what RPM does your 350 SBC idle?
Cold start: around 900 in park/750 in gear, after warmed up about 800 in park/and anywhere from 650-800 in gear.( seems to fluctuate for some reason.) 350 bored over.04,stock intake,comp cams XE250, H.E.I.,fresh rebuild original q-jet.
__________________
1972 C/10 LWB - Mine 1964 C/10 LWB - My Dad's Instagram: Mike_The_Grad |
![]() |
![]() |
![]() |
#24 | |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,628
|
Re: At what RPM does your 350 SBC idle?
Quote:
What's your initial timing and where is your vac advance hooked to? |
|
![]() |
![]() |
![]() |
#25 |
Senior Member
![]() Join Date: Oct 2013
Location: Santa Paula, CA
Posts: 600
|
Re: At what RPM does your 350 SBC idle?
14° initial at idle, no vacuum advance currently. Found the diaphragm is ruptured.
When I pulled the dist. to adjust shaft endplay, I actuated the units control arm and about an ounce of varnished gasoline shot out of the nipple connection. The rupture formed soon thereafter.(I've rebuilt my 4MV since then,found a saturated float,and really fine beach sand clogged inside the entire pass. side idle feed passage and partially clogging same side main well pickup.) So I've capped the can off in the mean time,and plugged the timed port it was connected to. I get 20° mechanical. Determined by advanced light measuring at 3000 rpm with vac. Advance plugged, and with vac. advance connected. (Had 52° with it hooked up and initial at 12°,then disconnected had 32° total with initial at 12°) To be honest geezer#99 I've been contemplating PM you for some advice on this, and maybe a second opinion on a theory I have that may be the root of the issue. But wasn't sure how to approach you. I spend a lot of time searching these forums for a solution to my issue,but don't really see the same scenario that others have had, and I see your name come up quite often with positive,valid info,and a logical approach. Not trying to hijack this thread! I'd gladly take this elsewhere if only I knew how.
__________________
1972 C/10 LWB - Mine 1964 C/10 LWB - My Dad's Instagram: Mike_The_Grad |
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|