quick question on sbc timing

blackandbluefj · 03-30-08, 11:52 AM

ok just did a 350 swap into fj60 and engine builder stuck on a set of 305 heads and a torquer cam and i cant remember from who but being sunday and i cant get hold of him till tomorrow i was wondering where to set ignition timing. on a 88 350 tbi have it set to 0 but heard anywhere from 2 to 10 btdc. does this make any sense

thanks all
Bryon

hammerhead · 03-30-08, 08:17 PM

I run 7° on my old carbed motor with HEI...

Gumby · 03-31-08, 08:00 PM

8ish would be a good place to start. If it starts to ping at all with the higher compression heads, turn it back.

If you want to run premium you can go a little more, if you run regular and/or live where it gets good and warm, you need to run less.

camcruiser13 · 04-01-08, 10:30 AM

i think it like on e degre for every thousand feet above sea level? does this sound right

kc_chevota · 04-01-08, 07:02 PM

0 deg if you have a stock chip, i run mine at 5 with a aftermarket chip and have the knock sensor hooked up. don't forget to open the timing jumper when seting.

Rob

Eskimo · 04-05-08, 09:05 PM

Man, 305 heads never flowed very well, not sure why he'd do that...

attatoy · 04-05-08, 10:10 PM

hei ............. 8 degrees and addjust higher slowley till pinging then retard 2 degrees, TBI ........well why would you waste your time?

blackandbluefj · 04-08-08, 06:21 PM

well he has done many boat motors like this and says it brings thee torque range down to idle and quite frankly it seems like its true. I didnt need or want a racecar, already did that and got the tickets. and i have already snapped a rubber motor mount so i seems pretty peppy but i've yet to get offroad

thanks
Bryon

Gumby · 04-09-08, 06:31 AM

That's exactly why it's done. Better low end and higher compression. TBI works great for crawling. I'd take it over TPI any day.

Alz Toy · 04-09-08, 04:33 PM

Quote:

Originally Posted by Eskimo

Man, 305 heads never flowed very well, not sure why he'd do that...

601's, and 416's are supposed to be decent heads, came on the HO motors. Smaller ports and valves mean higher velocity up to a point ( lowwer rpm's ), which means more torque and throttle response. The 601's are supposed to be the best of the lot. Good chamber design, allows running a LITTLE higher comp ratio without problems. Lots of Guys doin this on the Chevelle Tech forum, on there street cars. Just passing some info on. Al

'74 UA FJ · 04-10-08, 06:57 AM

305 heads are the cheap way to bump up compression on a 350. Another (better) way is to buy 350 vortec heads.

Gumby · 04-10-08, 07:47 AM

Quote:

Originally Posted by '74 UA FJ

305 heads are the cheap way to bump up compression on a 350. Another (better) way is to buy 350 vortec heads.

votec heads are a minimum $100 + another $100 to find out they are cracked at the center coolant holes.

305 heads should be damn near free.

I had 305 heads on my T100 350, but recently put that block under vortec heads and intake in a Suburban.

03-30-08, 11:52 AM	#1
blackandbluefj IH8MUD Regular Join Date: Nov 2004 Location: shrewsbury, pa Posts: 207	quick question on sbc timing ok just did a 350 swap into fj60 and engine builder stuck on a set of 305 heads and a torquer cam and i cant remember from who but being sunday and i cant get hold of him till tomorrow i was wondering where to set ignition timing. on a 88 350 tbi have it set to 0 but heard anywhere from 2 to 10 btdc. does this make any sense thanks all Bryon

03-30-08, 08:17 PM	#2
hammerhead IH8MUD Lifer Join Date: Jul 2003 Location: Central, Utah Posts: 1,986	I run 7° on my old carbed motor with HEI... __________________ utah4x4club.com U4WDA

03-31-08, 08:00 PM	#3
Gumby Former Wheeler Join Date: Dec 2002 Location: Knee deep in hookers and gin TLCA# 5658 Posts: 4,966	8ish would be a good place to start. If it starts to ping at all with the higher compression heads, turn it back. If you want to run premium you can go a little more, if you run regular and/or live where it gets good and warm, you need to run less. __________________ War Pig and Cerdito "Don't you know, Stan, it's *always* between a Giant Douche and a Turd Sandwich."

04-01-08, 10:30 AM	#4
camcruiser13 IH8MUD Lifer Join Date: Jun 2004 Location: in the garage after dark in UT Posts: 5,106	i think it like on e degre for every thousand feet above sea level? does this sound right __________________ cc ------------- 76' fj40 camcrusier13 build threads the following are links, just click, go on try it Traction Bar Sliders Ram Assist Bumper Poison Spider Style Shackle Reversal Half Doors if your doing it im sure ive done it, need help just ask.......

04-01-08, 07:02 PM	#5
kc_chevota IH8MUD Regular Join Date: Feb 2003 Location: Kansas city MO TLCA# 13454 Posts: 433	0 deg if you have a stock chip, i run mine at 5 with a aftermarket chip and have the knock sensor hooked up. don't forget to open the timing jumper when seting. Rob __________________ Rob R. 1979 VJ40 1984 FJ60 Coming soon 09 Get Flat Nasty With TAC Tornado Alley Cruisers vice pres I know the voices aren't real, but they do have some good ideas.

04-05-08, 09:05 PM	#6
Eskimo IH8MUD Lifer Join Date: Sep 2002 Location: Danville, PA Posts: 1,154	Man, 305 heads never flowed very well, not sure why he'd do that... __________________ Rich in NC FJ - '73 FJ-40 Cruggy - LSx/4-wheel steer Rockwells/4-link/coilovers/42's Build thread --> http://forum.ih8mud.com/hardcore-corner/124040-keeping-low-rockwells-k-under-knife-again.html '01 Chevy 2500HD 8.1 Allison Lux-o-tow

04-05-08, 10:10 PM	#7
attatoy IH8MUD Rookie Join Date: Feb 2007 Posts: 67	hei ............. 8 degrees and addjust higher slowley till pinging then retard 2 degrees, TBI ........well why would you waste your time?

04-08-08, 06:21 PM	#8
blackandbluefj IH8MUD Regular Join Date: Nov 2004 Location: shrewsbury, pa Posts: 207	well he has done many boat motors like this and says it brings thee torque range down to idle and quite frankly it seems like its true. I didnt need or want a racecar, already did that and got the tickets. and i have already snapped a rubber motor mount so i seems pretty peppy but i've yet to get offroad thanks Bryon

04-09-08, 06:31 AM	#9
Gumby Former Wheeler Join Date: Dec 2002 Location: Knee deep in hookers and gin TLCA# 5658 Posts: 4,966	That's exactly why it's done. Better low end and higher compression. TBI works great for crawling. I'd take it over TPI any day. __________________ War Pig and Cerdito "Don't you know, Stan, it's *always* between a Giant Douche and a Turd Sandwich."

04-10-08, 06:57 AM	#11
'74 UA FJ Roll Tide! Join Date: Aug 2005 Location: Gainesville Posts: 1,347	305 heads are the cheap way to bump up compression on a 350. Another (better) way is to buy 350 vortec heads. __________________ 1974 FJ40 FI vortec 350, H42/Orion 4:1, 4" lift, 35x15.50 SXs on MRW beadlocks, lock-rited f/r, Saginaw ps, etc, etc. 1994 FZJ80 with lockers and 285 revos.

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