i have a tight budget right now but i am about a car length behind my buddys 07 mustang gt. what r some easy mods that can show an improvement? i was thinking 160 therostat, undrives, ac delete?

 

What are your current mods?

 

i have cai, pacesetter headers and y pipe, slp catback. 3.73 gears. i also have a prted intake manifold not on the car because i need a bigger TB and injectors and a tune.

 

I would be willing to bet you dont need bigger injectors. I didnt even really need the bigger injectors the way mine is setup now, I just did to be safe.

I am guessing your headers are shorties?

From what some people have been saying on these forums just a mail order tune would probably get you a few hp... they would probably say something like 15-20 hp. Not that I agree, but unless you want to do a cam/valvetrain you are kind of running out of options.

So: tune, cam & tune or electric water pump are my suggestions. I did feel a little bit from my elec wp. You could also do 1.6 roller rockers, but I am not sure if they are worth any real hp.

 

yea its a 94 z28, a4, midlength headers, y pipe and 3 inch SLP. 3.73 gears. you think with the ported manifold and a 52 mm TB i will be able to get it tuned and be able to run stock injectors aand notice some power?

 

Well, I will say that with throttle bodies I do not know much about power gain at your level. I still had shorty headers and stock TB when I ran my 12.2s@113. I just now updated to a new TB.

I do know that you do not need new injectors unless something is wrong with yours. I ran stock injectors with a cam and ~330 rwhp, so you will be fine with your stock injectors.

 

so a ported intake mani. is pointlesss and wont be a HP gain even with a custom tune and TB?

 

Forget the underdrive pulleys, there's better ways to spend that money. Don't bother with the manifold, TB, or injectors until you have futher upgrades that require them.
If your on a tight budget I'd put the thermo in, get a tune, and put a cut-out in the exhaust. Good luck.

 

tune, tires, stall