I'm trying to figure out a guesstimate on what cfm the following intake setup would flow:

All parts will be extrude honed to the max by ExtrudeHone.com

Accel TPI base manifold
SLP TPI runners
Factory TPI plenum (totally hogged out as much as possible)
52mm TPiS throttle body

Any guesses? I'm eventually going to go with an even larger TB but don't know when or what size. This will all be getting blown by an F1 ProCharger.

Thanks!

 

Total package maybe 240-250cfm. I assume you are using the 2nd design SLP runners.

 

I bought them new from SLP in 2001 or 2002 I think because the original ones had been removed by the time I purchased the car in 2000. When did SLP revise the design?

Is that the most I can squeeze? What would a larger TB get me? Or is the stock plenum the bottle neck?

 

You have the 2nd design SLP runners. Out of the box they don't flow all the great. Extrude Hone will help but IMHO that is the bottle neck. They need a lot of help with a die grinder. Depending on how far you want to go with welding and grinding they can be made to flow very well with over 300cfm.

Nothing wrong with the factory plenum as it can be opened up to flow more than enough cfm. With work you can get over 300cfm with the parts you have. Dr J opened up an Accel TPI intake manifold to flow over 330cfm.

 

Ok cool. Who is Dr J? I tried a user search and couldn't find him. I'd sure like to pay him to work that magic on my manifold! Hmm, that doesn't sound right

So the runners need the most work huh. I don't want to cut them open like some I've seen here but do the most I can otherwise. I don't have any air tools, or grinders, or bits. I wish there was some place I could just send all the parts to...

 

Dr. J has a head porting business in our area and that is why we use him. He has become familiar with TPI through us and is impressed with the flow numbers that can be achieved. Here is his website.

http://www.j-performance.com/index.p...d=16&Itemid=30

 

SWEET!!! Thanks! I emailed them for a quote so I can send them all my intake parts.

 

did he ever get back to you on a price?

 

Yes, on Monday. I am stopping and selling everything to start another project though.