6th Gen ('00-'05): 3800 N/A Engine overhaul!!
my good friend it making 326whp on a dynojet with race fuel and 304whp on pump fuel.
stock l67 bottom end
stock cam
stock heads
ported gen v (3.0 pulley)
intercooled
1.9 rockers
headers
built trans
A LOT OF TUNING!!!!
stock l67 bottom end
stock cam
stock heads
ported gen v (3.0 pulley)
intercooled
1.9 rockers
headers
built trans
A LOT OF TUNING!!!!
Thread Starter
Joined: Nov 2006
Posts: 47
From:
Ok: So you are going to run a full L67 and your stock NA trans. Neither stock PCM will run the combo. you will need a custom pcm from one of the vendors. the main diffs are: trans gear ratio, MAP sensor, and the boost bypass solenoid.
-Harness. not needed. you can get the two missing harness pieces for less then what you would pay at a junk yard for a harness. (boost bypass solenoid, MAP sensor)
-Either PCM can be reprogrammed or used as a core for your mail order PCM. For the power level you are after I strongly recommend a custom in car tune vs a mail order PCM.
The following is how I recommend go about the power level you are after:
-Don't waist time having the engine bored or custom internals. this money can be better spent on other mods. the stock bottom end is plenty strong for even the radical builds.
-XP cam, 105# springs, double roller timing chain, new valve seals
-Gen V blower, Headers, Custom tuned PCM
this should hit your 250-300 hp mark.
My plan to reach about 300 hp is:
stock NA block.
Ported Heads w/ Si Valves, viaton seals, L76 springs, mod'd retainers
Port matched LIM w/ coolant block off for SC
Ported Gen III 3.8" pulley
Ported L67 TB and have Northstar TB to test as well
Speed Daddy Headers
Full 2.5" exhaust
Lots of tuning.
-Harness. not needed. you can get the two missing harness pieces for less then what you would pay at a junk yard for a harness. (boost bypass solenoid, MAP sensor)
-Either PCM can be reprogrammed or used as a core for your mail order PCM. For the power level you are after I strongly recommend a custom in car tune vs a mail order PCM.
The following is how I recommend go about the power level you are after:
-Don't waist time having the engine bored or custom internals. this money can be better spent on other mods. the stock bottom end is plenty strong for even the radical builds.
-XP cam, 105# springs, double roller timing chain, new valve seals
-Gen V blower, Headers, Custom tuned PCM
this should hit your 250-300 hp mark.
My plan to reach about 300 hp is:
stock NA block.
Ported Heads w/ Si Valves, viaton seals, L76 springs, mod'd retainers
Port matched LIM w/ coolant block off for SC
Ported Gen III 3.8" pulley
Ported L67 TB and have Northstar TB to test as well
Speed Daddy Headers
Full 2.5" exhaust
Lots of tuning.
FYI. The topswaps high compression makes modding and tuning much harder and less forgiving. I chose this route because: 1) I have extensive tuning background. So I can keep it Kr free. 2) it was cheaper to get the L36 drop in with top swap kit. 3) I preferred having the 3.29 gears of the NA Trans. 4) it got the car back on the road faster while still allowing me to have time to port everything.
When I made my suggested mod list for you I was assuming you we're going L67. Another option would be the L32. Basically it's the newer series 3 L67. But you would need to change the TB as its is fly by wire.
When I made my suggested mod list for you I was assuming you we're going L67. Another option would be the L32. Basically it's the newer series 3 L67. But you would need to change the TB as its is fly by wire.
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