Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: johnf on September 06, 2005, 09:44:24 AM

Title: Boost down following engine change
Post by: johnf on September 06, 2005, 09:44:24 AM
Hi

Follolwing the death of my eingine  :mad:  I opted to buy a second hand unit and had that fitted.

The boost gauge on the old lump used to register up to 10psi, however since the install of the replacement lump I only get 6psi.

It has an apexi and was mapped for the original engine but I haven\'t had a re-map since the change over.

What could cause this drop off in boost limit.

John
Title: Boost down following engine change
Post by: bnaellis on September 06, 2005, 09:56:53 AM
prob vacuum hose under uim the 96 onwards cars have a seal unit for most of the solenoids has this been taken apart as it requires a little work to get it perfectly aligned again.
Title: Boost down following engine change
Post by: johnf on September 06, 2005, 10:07:55 AM
Thanks Brian, I will ask the question.

John
Title: Boost down following engine change
Post by: 20B_boy on September 06, 2005, 02:17:14 PM
Quote from: johnfThe boost gauge on the old lump used to register up to 10psi, however since the install of the replacement lump I only get 6psi.
Ask whomever installed the engine, a rats nest problem as Bri says probably. The joys of the twin turbo control system!
Title: Boost down following engine change
Post by: 93type-x on September 10, 2005, 07:33:43 PM
look at the wastegate actuator lines under the twins, check if the pipes still have the "pils" in.

si
Title: Boost down following engine change
Post by: cjr on September 10, 2005, 08:31:25 PM
96 onwards have the pills in the turbo pack themselves, not in the pipes