The reason why I dont think anybody is replying is because nobody knows the answer.

Yep, I think that would be a safe assumation of the situation....

couldnt u contact gm to find out

The only real diff between the L27 and the L36 is the fuel system. We use TPI. An upgraded fuel delivery system would probably weild us L27 users the greatest bonus, and give us some more high end HP.

Comp Cams sells cams for the series 1 3800. I was looking at one a awhile ago. 26 hp increase for $400, that isnt Bad.

DP is a great store, i just wish duty and exchange didnt kill me here in Canada.

Ty, how much does an average upper and lower intake porting add in hp/tq?

Not really sure exactly how much but you can definately port match your heads which is really more than you think. If you haven't already check out the web page in my sig and check out the exhaust ports on mine. I can't picture wanting any bigger. Because it is force fed and I wanted to keep velocity I didn't port the intake much but there is still enough room to satisfy your porting wants.

Enlarge it to the size of the gaskets and profile the top of each runner well. Smooth the turns.

I actually found a shop who was willing to do either a custom port and polish job on my existing intake manifold , or, using it as a template, build me a custom unit. I haven't sent it to him yet, but I will be doing so this week. He works in a race shop in florida, here'* the link:
http://www.autoshopracingengines.com/speed_shop.htm

I have a 1991 Buick Riviera, in cherry condition. The engine is a brand new factory crate Series 1 Supercharged. I will most likely be sending him my entire head for a performance rebuild. Who knows, since it'* in the crate I may just send him the whole thing and have it Dynotuned too! (pipedream) Wouldn't that be something?

I cant say as I will be back this way again as I am always on the go trying to find a bigger and better performance part for the engine the world forgot. By all means though, if you have found anything really cool, or you want info on my progress please email me bgagnon@mesanetworks.net. I look forward to trading success/failure stories with my fellow series I owners.

I have a few tricks up my sleeve for Canadian buyers. No tax no Gst.

shhhh

Ty

Kewl, that'* what I was wondering. I have run into a situation in the past where port matching the gaskets would make the walls to thin, and I didn't wanna run into that again... What I did instead was port match the opening, and not the entire port (smoothing it instead, garage job), making it a trumpet shape (so-to-speak) increasing air velocity...