I am planning on running vortec heads with the new manifold doomed to never arrive on my '87 350TPI Iroc . I'd like to think I can lose both my egr and air systems when doing this. Have any of you guys got away with doing this? I want to spend my money on things other than a $300 custom chip. Any thoughts will be apreciated.

 

I have removed my AIR pump and EGR,with no
codes.This is on my 90 TA.

Nitro Don

------------------
1990 Trans Am WS6
305TPI 700R4

ENGINE:
150hp NOS kit
March underdrive pulleys
Edelbrock headers(JetHot)
Mac off-road pipe
Flowmaster exaust
Jacobs ultra coil
K&N filter
Fulley ported base,
runners,& plenum
Crane AFPR
Hypertech airfoil
Crane 1.6 rockers
210/220 .533/.544 Cam
W/P Torquer heads
Edelbrock TPI Base
Edelbrock TI Runners
Edelbrock 52mm T.B.
TRANSMISSION:
Richmond 3.73's
Auburn posi
B&M Mega shifter
TCI shift kit
Vette servo
B&M 3-4 upshift kit
TCI Trans Rebuild
2800 stall 9.5" TC
Nitto Drag radials
FUTURE MODS:

BEST RUN:
12.48 @ 109.23 MPH
(with stock heads,cam,intake,and crappy Pep Boy's tires)

 

For $200 you can get the gear to do your own chips. Then even tune it right.
Might read thru the prom board section for a while

 

The AIR system you can remove without worry for prom calibration as it only distributes air to the manifolds under open loop operation, and also to the cats. The EGR system may be a different story, so make sure your cooling system is good if you remove it (it lowers combustion chamber temps).

 

My feeling is that you will need to adjust your spark advance in the 65-80 kPa MAP region and 1500-2500 rpm range. With no EGR you will probably be over advanced and will get detonation. I know I did!!! I had to take out about 10 degrees in the this region to stop my pinging.

------------------
Dave Zelinka

 

cool-thanks guys!