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Do the '95 TA's have aluminum heads?

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  • #1

    Do the '95 TA's have aluminum heads?

    I read a tech article but it did not give specifics as to which LT1's had alum. heads and which had iron heads.

    Can someone please let me know?!?

    '95 TA A4, 118000 on the clock!
    Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.

    13.685@102.11
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  • #2
    I know the F-body and Corvette had aluminum heads. I think the Caprice may have had cast iron heads.


    LT4KM, 160' TS, MAF ends, TB-BP, GMPP 1.6 R/R, SLP CAI, LCA, Adj. tierod, BMR tower brace, 17x9"F/R, 275/40R17 GY F1 tires. WS6 Muffler, LS1 DS. 21mm rear sway bar. Soon to be LT4 heads, intake, & HOT cam

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    • #3
      I know the baby LT1 ( caprice) had iron heads, and I believe that the first LT1's had aluminum heads and then they changed to iron heads that supposedly made 20 more horsepower. I don't really know.

      I have to be sure about this though. Anyone else?

      '95 TA A4, 118000 on the clock!
      Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.

      13.685@102.11

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      • #4
        ALL F-Body and Corvette LT1's are aluminum heads. Only the Caprice/SS/Roadmaster/Fleetwood LT1's have cast iron heads.
        Fred

        381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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        • #5
          Thank you

          Is there a kind-of baseline flow number for these heads?

          Also what compression do these motors use? Is it 10.5.1?

          '95 TA A4, 118000 on the clock!
          Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.

          13.685@102.11

          Comment

          • #6
            Originally posted by jerrysta
            Is there a kind-of baseline flow number for these heads?

            Also what compression do these motors use? Is it 10.5.1?
            Yes, it was 10.5:1 compression for the LT1. Also, I believe the Impalas received the iron heads too, but I could be wrong.
            Steve
            79 FSJ - most expensive AMC Jeep ever Mods
            87 GN - its just a 6... Mods
            93 Z28 - slightly tweaked Mods
            http://home.comcast.net/~budlopez

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            • #7
              Originally posted by Steve93Z
              Yes, it was 10.5:1 compression for the LT1. Also, I believe the Impalas received the iron heads too, but I could be wrong.

              Yes, when Fred said " Caprice/SS/Roadmaster/Fleetwood" I'm sure he meant Impala SS.
              Tracy
              2002 C5 M6 Convertible
              1994 Z28 M6 Convertible
              Current Mods:
              SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

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              • #8
                Originally posted by TraceZ
                Yes, when Fred said " Caprice/SS/Roadmaster/Fleetwood" I'm sure he meant Impala SS.
                Whoops, missed that part . Thanks Tracy
                Steve
                79 FSJ - most expensive AMC Jeep ever Mods
                87 GN - its just a 6... Mods
                93 Z28 - slightly tweaked Mods
                http://home.comcast.net/~budlopez

                Comment

                • #9
                  Here's a good link for identifying some of the differences in the LT1 engines over the years, and between the aluminum and CI head engines:

                  http://www.automotiverebuilder.com/ar/ar99928.htm

                  Here's a link showing the differences in flow between the LT1 aluminum and CI heads, and the LT4 heads (and even the Dominion/Arao 32-valve heads) both stock and ported:

                  http://www.malcams.com/legacy/misc/headflow.htm

                  Here's a link that shows the differences between the LT1 and LT4 engines:

                  http://www.grandsportregistry.com/lt1vslt4.htm
                  Fred

                  381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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                  • #10
                    Yes, all f-bodies and y-bodies received aluminum heads. Compression ratio is 10.4:1 on the LT1's and 10.8:1 on the LT4

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                    • #11
                      Pretty sure I've seen it posted as 10.5:1 just about everywhere.

                      '95 TA A4, 118000 on the clock!
                      Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.

                      13.685@102.11

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                      • #12
                        Originally posted by jerrysta
                        Pretty sure I've seen it posted as 10.5:1 just about everywhere.
                        10.4:1 trust me. Lots of people have the bad habit of irresponsibly rounding up compression ratio decimals.

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                        • #13
                          Okay. Got ya!

                          '95 TA A4, 118000 on the clock!
                          Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.

                          13.685@102.11

                          Comment

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