Help a guy with a SB make some serious HP!

relaxinrob · #1 (**permalink**) 10-08-2004, 01:12 PM

I need some advise from anyone that has done a supercharger, injector, mass air and throttle body installation/upgrade. I have a 302 with GT-40 heads and cam, and an Edelbrock Performer 5.0 EFI system with 24# injectors and a ’90 GT computer. This current setup turns 243rwhp without any tuning/tweaking. I have purchased a Kenne Bell Blowzilla/Flowzilla supercharger with a 6lb. pulley. I have purchased the lower GT-40 intake that the system requires and installing these along with some other components will be my winter project. Some of the other parts I plan on installing are: a high-volume fuel pump, a Kenne Bell Boost-a-pump, 42# injectors, 80mm mass air and throttle body, all MSD ignition system with boost retard(6BTM), and some other items I can’t think of right now. My question is this: Does this sound like a setup that will be streetable and produce 400+ rwhp? If not, please give me your opinions on what I could do to get it there and still be streetable. Do you see any pitfalls to putting this system together? If so, what are they? Thanks in advance for any help you can offer.

Rob

MJN · #2 (**permalink**) 10-08-2004, 01:36 PM

Rob

Sounds good Rob. Your set up should get 400 RWHP at 8 psi of boost or slightly less. At 5 psi of boost my stroker makes 362 RWHP and 412 RWTQ. Sounds like you have all the right supporting parts as well. PM me with your e-mail address and I'll e-mail you my set up and dyno sheet. The main thing on a KB motor is to have it tuned by a good shop that has experience in KB's. The fuel and ignition curves to get max performance out of a KB are quite different to other supercharged set ups.

LwCwb · #3 (**permalink**) 10-08-2004, 04:02 PM

If the heads have not been ported, have them done. As for power, if you want gobs of it, replace the 302 with an FE and give this kit a try

relaxinrob · #4 (**permalink**) 10-12-2004, 01:11 PM

can anyone else help me with their experiences?

Thanks in advance,

Rob

grumpy · #5 (**permalink**) 10-12-2004, 02:37 PM

Rob,
If you have a good block, say FMS Sportsman, then add a chromed SCAT 28 ounce crankshaft, Crower Sportsman rods, Speed-Pro rings, Twisted Wedge heads with Scorpion rockers, "tuned" EDLEBROCK intake, 70 mm Throttle Body, 50 lb/hr injectors, Cartech Fuel rails, 75 mm Mass Air Unit, then add and top it off with a ATI P1SC-II Procharger, and a professionally balanced mass with an aluminum flywheel you will break the 550 HP very easily.
Bought right you can get the ATI for less than a S-Trim Vortech and generate more power.
Now where to put the power is the question, most street COBRAs cannot put it to the pavement and even handle 450HP as a rule.
grumpy

relaxinrob · #6 (**permalink**) 10-22-2004, 09:08 PM

UPDATE:

I have received the Kenne Bell 2.2 liter Blowzilla/Flowzilla supercharger and I have purchased the gt-40 lower intake that it bolts to. I am in process of port-matching the intake and polishing the ports. I have decided to go with a 90mm mass air and throttle body, 42# injectors, a high-volume pump with the Kenne Bell Boost-a-pump setup which increases fuel pressure by as much as 50% when 3-5lbs. of boost kicks in. Going to install irridium plugs 2 heat ranges cooler than normal to help with detonation. Going to install MSD 6BTM box(same as 6AL, but with boost retard), MSD pro-billet distr. and matching coil. Installing a T5Z transmission to handle the strain of the new setup and puttin an Auburn locker in the 9" rear (3.55 ratio).

After I get the installation done, I plan to have a custom chip burned for it.

Since this is my first time working with the supercharger and EFI mods, I am asking for any experienced input on what I may be missing or haven't thought about.

Thanks in advance,

Rob Burton

LwCwb · #7 (**permalink**) 10-23-2004, 05:38 AM

EDIT- Just saw you are putting a chip in it, I have to start reading more carefully.

RICK LAKE · #8 (**permalink**) 10-23-2004, 08:09 AM

Relaxinrob Rob couple of things 1st fuel supply, you need a min of 1/2" fuel line to the motor. Fuel volume is needed more than pressure. A 50lb injector, at 44 psi flows 50, run 65psi and the injector goes to 68,if the injector is not designed for for high pressure it can leak down into the cylinder and wash it. It happens. 2 times in my brothers mustang. I have 2 255 walpo fuel pumps in my car with 2 fuel lines 1/2". I have had problem with the clog belt alignment and keeping it on. The 2nd pump comes on when the boost hits. 1 lbs. The regulator is set at 45 psi under vacuum and goes to 63 at 7 psi. The wastegate is set at 8 psi. I can go to 15 psi of boost but not with 50 lbs injectors. 72 lbs would be the next ones. MAF and Throttle body need to match. The programing in the ECU must also match to make the car run right. Rob Make sure that Kennybell knows everything done to the motor, what trans, and rear gears you have in the car. Wieght also. The fuel and timing under boost is very important. If you are looking for a dyno shop, Second Street in PA is very good. 215-257-3724. Had my car done there with the speed pro setup. Rob 1 thing I learned with the fuel system HIGH PRESSURE DOESN'T MEAN ALOT MORE VOLUME. When running the car the fuel gets hot also.

Go luck with the car. If you can find Greg Lapoint, he has been running Kennybell on his cobra for years and runs 10.20 with a small block, see if you can talk to him. Rick Lake