hey guys I have a 89gt with a Kenne Bell 2.2 a
bbk cold air intake, 255 fuel pump, Full catless exhaust. I bought it this way. As far as I know the rest of the car is stock. Injectors,throttle body and mas air flow. Never been tuned from what the other owner told me. Car runs strong no issues just curious should I upgrade the throttle body and injectors? Will it make a big improvement? Any tips will be helpful I’m knew and this is my first foxbody. Thanks!!
I agree and disagree with some of these comments. A lot of people don't know what our Kenne Bell superchargers like and dislike and why. Take it from me, I know a couple things about them because I have a stock 302 Kenne Bell 2.1L supercharged car.
What
@2000xp8 said is very true, how much are you willing to spend to gain HP? What are your goals? Is this just a fun street car? Before doing any modifications you should hit the dyno to find out where you are with your HP/TQ. If you choose some upgrades then you can go back to the same dyno and see what power the new modifications brought you. Going to the dyno may also uncover any issues that you may have and be unaware of like if your lean in high load situations, unusually high Intake Air Temps (IAT's or also known as MAT). This is very important to know since KB's twin screw rotors produce a lot of heat while in boost.
Before I go any further, very nice car!!
My $.02 on your vehicle. You said PO (previous owner) didn't get it tuned. Most likely your car has a Kenne Bell computer with their base tune for a supercharged 302. Located behind the passenger kick panel you might find one of these.....
You having one of these computers or not is very important. Please verify before making any changes to your engine.
Next, What does a Kenne Bell supercharger like? Well, it likes a very UNRESTRICTIVE intake. KB's like big MAF meters, big intake pipes, big throttle bodies!! The opening on your inlet manifold should dictate the size of your intake components. The opening on my Flowzilla inlet is 90mm, therefore I have a 90mm Accufab throttle body along with a large Anderson power pipe leading to a huge
K&N filter inside my passenger fender (cold air!). The more cool air and larger the intake tract is the more your Kenne Bell SC is going to like it and you'll net more PSI of boost too! More boost = more HP.
Please verify and report back with crank pulley size and supercharger pulley size. We need to verify how much boost you're already setup for. Do not assume you have a stock size pulley. A popular modification is to run a F-150 6.5" pulley which will spin your blower and accessories faster. Faster you spin your blower the more PSI you make.
This is my car BTW