305 to 350 problems
09-26-2009, 11:28 PM
#1
Junior Member
Thread Starter
Join Date: Feb 2008
Location: Salt Lake City
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
Car: 90 Z28, 74 Scout II
Engine: healthy 355
Transmission: t-5
Axle/Gears: 4th gen 10 bolt 3.23
305 to 350 problems
I've just done my 305 to 350 conversion, (and a 700r4 to t-5) (90 marow RS). After a ton of headache I got pretty much everything dealt with except now my idle when warmed up is crap. It just will not stay running, I didn't know if my set up: throttle body to trans-dapt spacer to adapter plate to edelbrock performer could be the problem.....? Any advice, I read the thread talking about "tbichips". Thats what I'm running.... problem diagnosed?
thanx
Jay and RIP
thanx
Jay and RIP
09-27-2009, 08:18 AM
#2
Member
iTrader: (2)
Join Date: Sep 2006
Location: Greater D.C. area.
Posts: 440
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Camaro RS
Engine: LO3 TBI
Transmission: 700R4 => WC T-5
Axle/Gears: 3.42 Open Diff
Re: 305 to 350 problems
You changed the computer and the TBI? What kind of 350 do you have, a LO5?
09-27-2009, 03:29 PM
#3
Junior Member
Thread Starter
Join Date: Feb 2008
Location: Salt Lake City
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
Car: 90 Z28, 74 Scout II
Engine: healthy 355
Transmission: t-5
Axle/Gears: 4th gen 10 bolt 3.23
Re: 305 to 350 problems
I have the origional 746 computer with the "tbichip". The motor is first gen 350 I beleive, (has the two peice rear main seal"
09-27-2009, 03:30 PM
#4
Junior Member
Thread Starter
Join Date: Feb 2008
Location: Salt Lake City
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
Car: 90 Z28, 74 Scout II
Engine: healthy 355
Transmission: t-5
Axle/Gears: 4th gen 10 bolt 3.23
Re: 305 to 350 problems
oh, and the tbi is off the origional 305 but has injectors for a truck 350, (84 suburban)
09-27-2009, 03:56 PM
#5
Member
iTrader: (2)
Join Date: Sep 2006
Location: Greater D.C. area.
Posts: 440
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Camaro RS
Engine: LO3 TBI
Transmission: 700R4 => WC T-5
Axle/Gears: 3.42 Open Diff
Re: 305 to 350 problems
The speed density system of the TBI is calibrated to a LO5 350, not whatever 350 you happen to have. That's why it's not running worth ***. You probably need a tune.
09-30-2009, 01:22 PM
#7
Member
iTrader: (2)
Join Date: Sep 2006
Location: Greater D.C. area.
Posts: 440
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Camaro RS
Engine: LO3 TBI
Transmission: 700R4 => WC T-5
Axle/Gears: 3.42 Open Diff
Re: 305 to 350 problems
Yes, as in the computer needs to be calibrated to your particular setup.
Trending Topics
09-30-2009, 01:39 PM
#8
Junior Member
Thread Starter
Join Date: Feb 2008
Location: Salt Lake City
Posts: 61
Likes: 0
Received 0 Likes
on
0 Posts
Car: 90 Z28, 74 Scout II
Engine: healthy 355
Transmission: t-5
Axle/Gears: 4th gen 10 bolt 3.23
Re: 305 to 350 problems
thanks buddy, I'll giver a shot.
Thread
Thread Starter
Forum
Replies
Last Post
