09-26-05, 01:41 PM
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 | Banned Cadillac(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII  | | Join Date: Aug 2003 Location: Albuquerque, NM Age: 22 | |
| Re: The "4.9 liter turbocharger, stage 1" thread.
Quote: |
Originally Posted by N0DIH Calculate the boosted airflow requirements. If the turbo is at 14.7 psi, you are double the CID. Make sure the TBI unit will flow enough air for you, at 7.5 psi you are ballpark 450 cid. You may need a 454 unit, stock maybe, maybe a little porting. You don't want it to be a boost restriction and having it backing up the intake tract. I need to look at the allante intake more (is that Stage 1 or 2?). Make sure there is some plenum under the TBI. Being the 4.9L isn't a high revver, the 454 TBI is probably sufficient, for stage 1.... | You aren't going to need a bigger throttle body since the air is compressed it will fit through a 4.5 TB just fine. No way you'd need a 454 TB. |