91 ford thunderbird sport 5.0 - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > Ford Thunderbird Forum
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto EscrowInsurance

Ford Thunderbird Forum Forum for discussion of the Ford Thunderbird.

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 05-22-2013, 21:28   #1 (permalink)
Registered User
Join Date: May 2013
Posts: 1
91 ford thunderbird sport 5.0

Hey everyone i have a question about my 91 thunderbird sport 5.0 aod trans. i just bought the car yesterday i wanna know why it doesnt take off from the line very fast but takes off pretty good when going about 40mph. it has the following mods
Port and polished gt40 heads, trick flow upper and lower tubular intake and spacer, 70mm bbk throttle body and spacer, titanium valves retainers and springs new push rods and 1.7 rockers e303 cam flow master exhaust cobra 24lbs injectors and a bbk cold air intake.
the guy told me that he thinks there is a shift kit in it but not sure..
Do i need to put 3.73 gears in it? do i need to put a high flow fuel pump on it...or upgrade my mass air meter please help!
what do you think a good degree is for advancing my timing..
kevin_mcnamara is offline   Reply With Quote
Sponsored Links
Old 05-23-2013, 16:02   #2 (permalink)
Dazed and Confused
CatSkinner's Avatar
Join Date: May 2012
Location: Upstate New York
Posts: 3,213
Re: 91 ford thunderbird sport 5.0

The most notable difference you'll see is going to the 3.73 gears. You should have 3.08 which are fairly long legs, great for top end and cruising but poor for coming out of the whole. Be advised that going with shorter legs will get up and go quicker, but you're not going to be as comfortable on a long haul. My truck has 4.11 in the back and around town she holds her tongue but cruising around 70... you might want some hearing protection. Right now you're sort of limited by the block itself. Knowing where your peak is on your power curve (in regards to RPM's) will help in the set up. I wouldn't think you'd be out running your fuel pump and I don't think the MAF will make that much of a difference. To some degree, you might notice a difference with the timing as well, it can vary, especially with cams, I'd start at 15 advanced and work towards 20. Old timers used to set the time, then go climb a hill, and keep advancing it until they start to ping.
'Scuse me, while I scrape this Honda outta my treads.
CatSkinner is online now   Reply With Quote
Sponsored Links

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > Ford Thunderbird Forum

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 17:31.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.