Gen I 383 cam selection
03-11-2007, 12:23 AM
#11
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I thought it might have been all vacuum operated. Actually, I ditched the stock computer and went to a TCI T-COM for the tranny and FAST C-COM for the engine. I know this is off your thread but what computer are you using if you don't mind.
03-11-2007, 12:36 AM
#12
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Cheyenne383, I aggree the 180s may be a better choice for a na 383. I'm now using a Vortech YSi supercharger rev'd to max, that's why I picked the 195s. (Also they're smog legal for CA)
03-11-2007, 12:39 AM
#13
Originally Posted by AintNoHo
I thought it might have been all vacuum operated. Actually, I ditched the stock computer and went to a TCI T-COM for the tranny and FAST C-COM for the engine. I know this is off your thread but what computer are you using if you don't mind.
03-11-2007, 12:39 AM
#14
Originally Posted by AintNoHo
Cheyenne383, I aggree the 180s may be a better choice for a na 383. I'm now using a Vortech YSi supercharger rev'd to max, that's why I picked the 195s. (Also they're smog legal for CA)
03-11-2007, 07:25 PM
#16
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I just finished a 383 Vortec for my 98. I will be picking up the cam card this week and I will let you know what we used. The only problem I have right now, is that we have 1.6:1 roller rockers and I think it is causing a small vacuume problem. I will be talking to my motor guy this week to see if he realizes the ratio on the rockers. We took them off of the old heads, I had them installed a while ago to make the engine think it had a bigger cam.
03-12-2007, 04:22 AM
#18
Originally Posted by YenkoST
Well, I have a 218/224 in there currently with 9.5 compression but I am raising it to 10.5 and wondering if the 230/236 would be a big deal to run on the street.
03-12-2007, 10:28 AM
#19
Current setup is the same as #1 post but it has the 9.5 Comp. and 218/224 with .480 lift and a 112 lsa. No, vacuumm is fine. Vacuum reading is about the 16-17 marker....closer to 16 and sometimes 15 most times idling at 600rpms. So, the 280 XFI that I'm looking at is a 230/236 with .576 lift and 113 lsa using 1.6 rockers. I'm going to use 1.52 to be a little more street friendly. That will lower duration a little and lift. Lift will go to ~.550. Duration to about 229/235 or something like that if I figured it right.