7730 hard starting when warm
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Joined: Jul 1999
Posts: 1,992
Likes: 10
From: CT
Car: 1986 Camaro SC
Engine: 305 TPI Procharged D1SC
Transmission: Tremec TKO-600
Axle/Gears: Moser 12 Bolt 3.73 posi
7730 hard starting when warm
hi guys, i have a 305 with 30lb/hr injectors, and it's hard to start when warm and i shut it off, sometimes i have to put the pedal down while cranking, there is a guy near me with a transam 350 tpi stock and it fires with one click of the key... i want that, how do i attain it?
Joined: Apr 2004
Posts: 3,180
Likes: 3
From: Browns Town
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
I see you are running SD so I'm assuming its $8D.
You could tweak the values in this table or as RBob has recommended to change the table scalar so all the values are limited to fit your bigger injectors.
I made the change but did increase it back a bit to get faster starting.
Is doing pretty good now but I still need to tweak because sometimes it takes more than 1/2 of a revolution to start.
I love the instant on with injection
You could tweak the values in this table or as RBob has recommended to change the table scalar so all the values are limited to fit your bigger injectors.
Code:
;----------------------------------------------------------------
; CRANK PW vs COOLANT TEMP
; TYPE 0x8D ECM
;
; NOTE for bigger injectors change scaler lower
; by percentage of injector difference
;
; TBL = (usec * 65.536)/(SCALAR)
; SCALAR = 13108
;----------------------------------------------------------------
L83AD: .byte 0x25,0x8C ;=9612 SCALAR FOR MAX PW (Was $3334 = 13108)
; (used 22# / 30# = 0.7333 for new value)
; CAL = SCALAR * 65.536 (200 MSEC)
;VAL usec Deg C Coolant
;--------------------------------
L83AF: .byte 0xCD ;=205 41001 -40
.byte 0xB3 ;=179 35801 -28
.byte 0x60 ;= 96 19200 -16
.byte 0x36 ;= 54 10800 - 4
.byte 0x26 ;= 38 7600 8
.byte 0x14 ;= 20 4000 20
.byte 0x0F ;= 16 3000 32
.byte 0x0A ;= 10 2000 44
.byte 0x0A ;= 10 2000 56
.byte 0x0A ;= 10 2000 68
.byte 0x08 ;= 8 1600 80
.byte 0x08 ;= 8 1600 92
.byte 0x08 ;= 8 1600 104
.byte 0x08 ;= 8 1600 116
;----------------------------------------------------------------- Is doing pretty good now but I still need to tweak because sometimes it takes more than 1/2 of a revolution to start.
I love the instant on with injection
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