Im a new owner of a 94 Bonneville SSEi and was wondering what performance mods are available for the series 1 engine.. I've looked around Summit, Jegs and Intense racing for any Intakes, Pulleys, Exhausts, Headers or ECU upgrades and cant seem to find any.. Can someone please let me know if any exist?

A full tune-up comes first.

This comes second: http://www.bonnevilleclub.com/forum/...=article&k=104

You don't need headers. Series 1'* got the best exhaust manifold design GM ever created. But you HAVE to repair the cracks they've gathered over the years (they have cracks, trust me).

You won't find anything much on Summit or Jegs other than ignition coils and valve lifters.

How about you tell us your goals and your realistic budget, and we'll help you from there?

few grand at most... looking to keep up with the local v8 crew..

Actron CP9110 scantool off ebay. Cable from member Slug.
Actron fuel pressure gauge.
Remove EM'* and have cracks welded up (including under the heatshield on the crossover pipe)

Assuming all that goes well and your tuneup is done:

High flow Cat-$60 from www.justmagnaflow.com or ebay
FWI (for 1997 cars) from INTENSE. Single-reservior washer bottle from the wrecker.
2.55" 92/93 SSEi stock pulley size (+25hp/40tq) assuming good fuel pressure and no KR on a summer day.

Net effect will be about 30-35hp, 50tq. Set aside 2k at this point for your trans. Then start modding further with what'* left.

The car is fully tuned up with synthetic fluids all around and the fuel pressure is fine.. Im looking in to having the manifolds welded... Now what is FWI? and where can I buy the pulleys? ( I can only find series 2 pulleys) And what about Intakes or shift kits?

for new...
http://www.pulleyboys.com/gms1p.html

or you can find one from a stock 92-93 L67, which as will has mentioned is 2.55"

and fwi is fender well intake. read this http://www.bonnevilleclub.com/forum/...65&highlight=A

I hope you didn't use synthetic in the trans.

What'* your fuel pressure under prime (no start), idle, and idle with the FPR vac line disconnected?

FWI is fenderwell intake. That covers your intake question.

Shift kit? Save that for when your trans blows. It requires removal of the trans.

How much more HP do you guys think this setup will put out.

2.7" Pulley
Custom intake with k&n cone
custom 2.5inch catback and high flow cat/muffler

any reason you want a 2.7" pulley?

and if you do a "custom" intake, make sure it isolates the air intake from engine bay temps

Buy a FWI from www.intense-racing.com for 1997 cars, and ditch your double headlight washer bottle for a single to make room for it.

2.7" isn't a common size for us. 94/95 SSEi'* typically drop to 2.5 (or 2.55" 92/93 stock) IF and only if they satisfy all the requirements I posted. You need to understand that KR can kill your motor. Pulley drops aren't plug/play.

Custom catback will gain you nothing. You have 2.5" mandrel bent stainless already. Most run stock mufflers well into the 13'* on the quarter mile. Replace the cat with a high-flow cat and that'* all you need for a long time. Have you found a good price on ebay for your scantool and contacted Slug for your cable?

Stock with good compression, no leaky manifolds, and decent fuel pressure in good tune your car is 225 hp, 275 tq.

Your list would net you about 235hp and 285 tq.

Follow my list, and you'll get 240hp, 300tq. Assuming all the other stuff is taken care of.

What are your fuel pressure numbers?