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Throttle Body Coolant Bypass - ThirdGen. Org By IROCZDave(iroczdave@aol com) This procedure is considered a "free modification " After doing this myself on my engine (88' 350 TPI) I noticed a difference in the throttle responce right away, as far as horsepower, well I've heard you may get 5 additional HP out of this From what I have read GM incorperated this into the throttle body to prevent any kind of freezing of the TB valve in
14102187 heads on 89 L98 TPI IROC?? WTF!!!! - thirdgen. org The car ran VERY well Had awesome torque down low and began to fall on it's face at about 4k rpm I just thought that was from typical TPI horepower loss @ higher RPM I got these heads @ a good price VORTEC HYBRID CYLINDER HEAD W HEAT RISER MARINE AUTO USE 87-95 complete assembl 176cc intake runner 64cc combustion chambers 1 94" intake valve
Getting L98 into the twelves? - Third Generation F-Body Message Boards The TPI can go into the 12 sec range (N A) but it will be far cheaper and easier to tune if you ditch it and buy a stealth ram converted single plane mini ram All of the stock heads that these cars came with will need to be ditched for aftermarket aluminums or Vortec
1987 Chevy Camaro - ThirdGen. Org All TPI 350 IROC-Z's (1987-1990) and all TPI 350 Z28's (1991-1992) had automatic transmissions and most had rear disc brakes The eighth digit of the VIN is an `8' for 350 TPI's and an `F' for 305 TPI's The service parts identification list in the center console glovebox will list the code B2L and L98 for a 350 TPI, LB9 for a 305 TPI
Thread Pitch Chart - Portland Bolt Thread series cover designations of diameter pitch combinations that are measured by the number of threads per inch (TPI) applied to a single diameter Coarse Thread Series (UNC UNRC) is the most common designation for general application bolts and nuts Coarse thread is beneficial, because they are less likely to cross thread, more tolerant in