I have done this to 4 FDs:

Remove stock air box
Remove air pump
Block off two metal pipes above y-pipe
Install Efini Y-pipe
Install cone K&N filters on factory intake pipes
Leave factory "pop-off valve looking brown things" open where they are supposed to connect to airbox so they can make noise
Install Greddy "blue" water pump and alternator pulleys and new belts

The result is always that the 1st turbo becomes very lazy. The 2nd turbo pulls hard. What am I doing wrong?

Is it something with the charge relief and bypass valves? It is so sickening to completely lose the punch of the first turbo.... help

 

Is the primary turbo missing the extra air that was supposedly injected into the exhaust ports by the air pump? Was that helping the primary spool at low rpms? How about connecting one of the the charge control thingies to one of the two metal tubes?

 

is the possible... i have never heard of this happening?

 

I dont think the airpump not being there is the reason. Im not sure though...

 

I have never heard of that occurring in the past...

 

I can assure you that there is a very noticable turbo lag in all 4 of the cars only after and right after removing the air pump and installing intake. This is almost unbearable in the 2 ATs I've done. While I am convinced it has nothing to do with the actual airpump, it may very well have to do with me just venting the AIR BYPASS VALVE and CHARGE RELIEF VALVE to the atmosphere. Please help....... I've ruined my sequential kick!!!

3000 rpm & up things are normal and the secondary pulls hard. There is just absolutely nothing below 3000 rpm. Totally different than before

 

hhhmmm, interesting. I will hook my pump up tommorow to see if it helps. Mine is just disconnected waiting on a pulley set...

 

The only way the APV and CRV vent is if the valve itself is bad or the vaccum line senses vacuum. Do you have a boost guage? What's your pattern? Did you make sure all of the nipples on the y-pipe are connected to a hose?

 

I noticed ZERO difference in tubo lag when I removed my airpump.

 

Well the cars still run ok on the primary turbo, I guess it's either my imagination or I have a different problem.

 

~3000 RPM just happens to be when the air pump turns off. Less air below 3000 RPM = richer AFR. Richer AFR = less HP. I would expect 5-15 HP difference but there isn't much HP at that RPM anyway. Try downshifting. These cars aren't made for that low of RPM .

 

Me either, seems something else is afoot here.....

 

I supected the richer AF mixture. Unfortunately the cars are automatic and 2-3k RPM power is badly needed....... hmmm