How Much Hp WIll i pull

Hey guys, I have a 95 Riv Supercharged, 220hp Stock, i Bought some 103's im doing a FWI and a 2.5" pulley, I have Seafoamed Everything in my cars so its clean. and i put in a 180 degree Stat. I was just wondering, How many HP you think i will be pulling with all of these Mods done? I will be scanning my car to tune it for lowest KR. Thanx alot guys, Zach

About 240 HP at the crank (~200 WHP). You may get away with it on a dyno, but expect to see significant KR with that pulley drop on the street.

how are you going to tune it?
AA's estimates sound about right.
brand new your engine had 225hp IIRC. FWI adds ~5, pulley adds maybe ~15. so 240/245 if you have 0 KR and are using the most of your air/fuel.
you really should look into doing a DP or Plogs to keep knock down if the tune doesnt do it.

Being an S1, Plogs shouldn't fit.

The S1 manifolds are a much better flowing manifold than the S2 front manifold. Rears are about the same. The one thing to check for on an S1 front manifold is cracks. This is a very common issue and will show itself in the form of KR.

Also I think 103 plugs are too cold for your car. 104's or NGK TR55 would be a better choice

Agree, the 103s are for high-boost applications, or at least WOT all the time situations, not usually daily driving. They could foul quickly in a lightly modded car.

To run that pulley safely you might want to port and polish your M62. That should help you run KR free with a 2.5" pulley.

O Dang, I dint even know that . i was going by what pulley boys said on there website:

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Must read the fine print... they are covering their butts, so when your engine makes a strange sound, or loses power, they told you so...

"The recommended sizes are NOT conservative. They are the smallest size you should run on a stock or mildly modified engine..."

What this means to me is, the 2.5" pulley is NOT conservative. It is the smallest size you should run on a mildly modified engine, forget about trying it stock. If it were me, I'd want to know where are the the 2.6" or 2.7" pulleys? Why are you forced to ride so close to the edge? What if you get knock? Good questions for Pulleyboyz, imo.

Before you decide to start moding your series 1 give it the best tune up possible. Things like O2 sensor, fuel filter, weld any and all cracks on your exhaust manifolds, etc. For stock you have a pretty good exhaust. The main problem is the M62 supercharger. It spins very fast and because of that it gets very hot. The reason I mentioned porting on the other post is because the best begining mod for any series 1 L67 is to port and polish your supercharger and LIM. The casting for both is very rough and there is plenty to smooth and port. By at least polishing you will be helping keep the air coming in and out of the supercharger cooler, thus more oxygen to burn in each charge.

If you do decided to go with the 2.5" pulley, you can get one off a 92/93 series 1 L67, because that Gen 2 M62 came with a 2.55" pulley from factory.

Thanks alot Buickman104 ill take your advice into account.
I rpelaced the fuel filter today, and i plan on doing the seafoam crankase deal asap. Thanks for all your input guys!!