Hey guys I am trying to get more horsepower out of my new 1999 Bonneville SSEi with out making the car loud which means no Flowmaster on this one. This is my first Bonneville this new and the fact of it being Supercharged. I would like to have some ideas for the future. Thanks

A.J.

-3.4 pulley -Fenderwell intake(supercharger louder=fun)
-colder plugs
-Reprogrammed PCM (intense or DHP)
-180 thermostat
-Rockers

Those are what i see without doing some exhaust job(cat, downpipe , headers...)

Just with that you can get very low 14'*.

The 3.4 pulley,FWI, and colder plugs are what people begin with.

*note: you need at least the intake and the plugs for supporting mod to go with the 3.4 pulley.


With that you will love it

a hight flow cat is also a good idea...you dont have to change the muffler unless you want a different sound (No performance gain to a muffler) but the gains from a high flow cat would be to your advantage

I pretty much just have an intake, colder plugs, a cat, and the 3.4" pulley and I run a 14.5@95mph at the track on street tires. Add some slicks or drag radials to get the sixty foots down to ~2.1sec and my car should be around a 14.3.

Be sure to get a scantool to scan for knock retard. Without the help of some toluene to bump me up to 95 octane I could only run a 14.7@93mph because the PCM pulled timing when it saw the knock I was getting one the high end.

Well here is another question about the Supercharger. There is a slight knocking noise in the supercharger it only does it when in Park, when the car is put into gear it stops what is the problem?


A.J.

sounds like you need a coupler.

What kind of coupler. I would like to know because I am going to the dealership on friday to get it checked out. If you might know I would like tell them what it needs.

A.J.

change it yourself, but test first. remove belt from supercharger pulley and spin pulley back and forth quickly. Do you feel/hear play?.

To go further on what Sonoma said. It sounds like a coupler to me as well.

There are about 10 bolts, all 10mm that come out after the belt is off. then the nosedrive of the supercharger comes off and the coupler is right there. It slides right off and right back on.

You would need
2 Bottles of supercharger oil ~$7 each
1 Small tube of GM red gasket maker ~$3
1 Coupler ~$30

A 10 mm socket on a ratchet and about 1/2-1 hour of time.

i did 14.6 @ 96mph with a 2.1 on 60 foot with street tire.
no way you can get 14.3,not with just 2.1 ( i mean with your setup)
no additive.