My TR has the following...
Ported iron heads, 206/206 cam, TA60, V4, Houston DP, 009s,
ATR 2 1/2" exhaust, Mark H cold air.
I specifically went for the ported heads so I could run low boost on 94 octane. The engine is a new Jack Merkel build up, and runs like a bear. But, to get 16-17 pounds of max boost, I have to turn my wastegate rod waayyy down, and the spool up time is pathetic. With the old engine and stock heads, (everything else
the same) the rod was about 6 turns shorter for 17 pounds max, and part throttle response was much better. With the new engine, if I set the rod where throttle response is crisp and immediate, on full throttle boost shoots up to over 20 pounds.
I assume this is due to the better flow of the new heads, but how can I get the immediate spool up I used to have and not go over
17 pounds?
Paul from Whippany
Ported iron heads, 206/206 cam, TA60, V4, Houston DP, 009s,
ATR 2 1/2" exhaust, Mark H cold air.
I specifically went for the ported heads so I could run low boost on 94 octane. The engine is a new Jack Merkel build up, and runs like a bear. But, to get 16-17 pounds of max boost, I have to turn my wastegate rod waayyy down, and the spool up time is pathetic. With the old engine and stock heads, (everything else
the same) the rod was about 6 turns shorter for 17 pounds max, and part throttle response was much better. With the new engine, if I set the rod where throttle response is crisp and immediate, on full throttle boost shoots up to over 20 pounds.
I assume this is due to the better flow of the new heads, but how can I get the immediate spool up I used to have and not go over
17 pounds?
Paul from Whippany