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Thread: 327 LT1

  1. #1
    The Nitrous Outlet Junkie


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    Default 327 LT1

    I was thinking today and I got to wondering if anybody has built an LT1 down to a 327 cid. By switching out the crankshaft to a 3.25 stroke. I wouldn't consider it unless there was some type of documented repeatable improvements. But you always hear about the old-timers talk about their 327 small block Chevys and how bad them Motors were kind of makes me wonder what's going on?

    Sent from my SM-N950U using Tapatalk
    94 Formula; sleeper/budget build - total invested so far $2777,
    best pass to date 11.902 @113.73 (forged shortblock coming soon)

    95 Formula, R.I.P (check you oil pump drive gear)

  2. #2
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    Default

    I've never had a de-stroked reverse cool LT1 but I've had a few 327s. The only difference that I've seen is that they love the upper RPMs.

    Sent from my SM-G955U using Tapatalk
    Same as everybody else...350 small block, double hump heads, 3/4 cam

  3. #3

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    There is no improvement at all. It will make less power and torque than a 350. No replacement for displacement. On paper, an engine with a shorter stroke can potentially rev higher, but in the real world 350's can rev just as high.
    '94 coupe, 10.15 at 133.65 414" LT1, 4500 stall, n/a, pump gas, mufflers, street trim
    '14 1LE SS, 12.991 at 109.40 bone-stock

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    Default

    Quote Originally Posted by zooguy View Post
    I was thinking today and I got to wondering if anybody has built an LT1 down to a 327 cid. By switching out the crankshaft to a 3.25 stroke. I wouldn't consider it unless there was some type of documented repeatable improvements. But you always hear about the old-timers talk about their 327 small block Chevys and how bad them Motors were kind of makes me wonder what's going on?

    Sent from my SM-N950U using Tapatalk
    no torque. high rpm hp. I legitimately looked into doing it since I got punked on a l99 once, but it's really not worth the effort

    Sent from my SM-N950U using Tapatalk
    2009 G8 GXP #871 - Stock and faster than my LT1

    1994 Z28 T56 - Le2 H/C, SBE, Hooker lt's, some rod ended suspension stuff, and a whole lotta tetanus

    The wrench for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ P600B/ CPT Pro Race/Pro Torque 3200

  6. #5
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    Default

    As a highly qualified “old-timer” (aka “senior citizen”) I can explain the place the 327 holds in our hearts.... it was a nice upgrade from the previous 283, which had been a nice upgrade from the original SBC at 265 ci. It’s as simple as that.

    I had a 1956 Bel Air convertible with the 265. When I graduated from college in 1963, I sold the 56 and jumped on a 1963 Bel Air I found sitting in a dealer showroom - had a grand total of three options - 300 HP 327, posi rear axle and an AM radio. Base 3-on-tree, no power anything, no A/C. Ran the pi$$ out of that thing. Swapped in a close ratio T10 4-speed and 4.11 gears. No trouble dusting 390 Fords. People had lost interest in the 265 and 283 as Chevy discontinued them. The big-buck guys had their 348 and 409 “big-blocks”.

    When Chevy upped the SBC to 350 ci, interest in the 327 died off. The only reason the 302 showed up in the Z28 Camaro was the SCCA's 305 ci displacement limitation set in Trans Am Racing.

    The only advantage of the 327 was the fact it had 44 more cubic inches than the 283.

    94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams solid roller / TH400+GearVendors OD / 4.11's/Strange 12-bolt / 300-shot (dry) N2O / Spohn Suspension / 6-pt roll bar /AutoMeter instrumentation / MoTeC M48 Pro engine management system /a few other odds 'n ends.

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  8. #6
    The Nitrous Outlet Junkie


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    Default

    Quote Originally Posted by Injuneer View Post
    As a highly qualified “old-timer” (aka “senior citizen”) I can explain the place the 327 holds in our hearts.... it was a nice upgrade from the previous 283, which had been a nice upgrade from the original SBC at 265 ci. It’s as simple as that.

    I had a 1956 Bel Air convertible with the 265. When I graduated from college in 1963, I sold the 56 and jumped on a 1963 Bel Air I found sitting in a dealer showroom - had a grand total of three options - 300 HP 327, posi rear axle and an AM radio. Base 3-on-tree, no power anything, no A/C. Ran the pi$$ out of that thing. Swapped in a close ratio T10 4-speed and 4.11 gears. No trouble dusting 390 Fords. People had lost interest in the 265 and 283 as Chevy discontinued them. The big-buck guys had their 348 and 409 “big-blocks”.

    When Chevy upped the SBC to 350 ci, interest in the 327 died off. The only reason the 302 showed up in the Z28 Camaro was the SCCA's 305 ci displacement limitation set in Trans Am Racing.

    The only advantage of the 327 was the fact it had 44 more cubic inches than the 283.
    Well that's extremely helpful and now I know the history behind it ... thank you sir.

    Sent from my SM-N950U using Tapatalk
    94 Formula; sleeper/budget build - total invested so far $2777,
    best pass to date 11.902 @113.73 (forged shortblock coming soon)

    95 Formula, R.I.P (check you oil pump drive gear)

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    ...ah yes...memories of my 327 with "camel" hump heads (2.02/1.60) right out of a junk yard pull back in '70. Got it for $75 and backed it with a Muncie 4 speed in a 55 short bed truck. Drove it like I stole it and it never missed a beat.
    96 BBB 383/T56

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