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01-04-2011, 03:56 PM | #1 |
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OLDER ENGINE SPEC's
If anyone is interested I recieved my old NHRA/IHRA engine spec book back today. I have spec's for most older combos for around 1984 and back showing cam duration, overlap spec's and valve spring pressures for those interested in IHRA pure stock. Same deal for older stockers for what ever combos NHRA will be allowing to run this coming year. I still need an old NHRA "Red Book" guide for the class breaks for the older cars if anyone who has one would loan one to me so I could make copies or at least offer to post any such info requested.
Last edited by X-TECH MAN; 01-04-2011 at 03:58 PM. |
01-04-2011, 10:00 PM | #2 |
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Re: OLDER ENGINE SPEC's
Would you please post the spec's for the 428 1967 Shelby.
Thanks Larry |
01-04-2011, 10:07 PM | #3 |
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Re: OLDER ENGINE SPEC's
1958 pontiac
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Vic Guilmino 1129 STK |
01-05-2011, 01:00 AM | #4 |
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Re: OLDER ENGINE SPEC's
66 283 220horse
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future superstock eliminator racer and gear banger.... |
01-05-2011, 08:33 AM | #5 |
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Re: OLDER ENGINE SPEC's
Now you won't be bored anymore Terry....lol
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Danny Waters, Sr / 73 Duster "340" |
01-05-2011, 09:44 AM | #6 |
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Re: OLDER ENGINE SPEC's
1966 283/220 HP has a "rated" comp ratio of 9.25. Uses a Roch carb # 4GC-7025127 for a stick and 4 GC-7025126 for a P/G.
1.5 rockers Hyd. cam 54.9 CC's for the head and .002 deck Flat top pistons w/ 4 valve relief's Intake valve 1.725 Exhaust 1.505 Cam: zero checking clearence, 300 degress duration on I and Ex. with 78 degrees overlap. .399 lift. single spring w/damper 86 lbs closed spring pressure 180 open spring pressure .018 head gasket |
01-05-2011, 09:32 AM | #7 |
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Re: OLDER ENGINE SPEC's
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01-05-2011, 09:25 AM | #8 | |
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Re: OLDER ENGINE SPEC's
Quote:
Both of these are 428's. The only single 4 version is listed at 355 HP. Uses a 4150 Holley carb. .485 lift cam w/solid lifters. 68.0 CC heads small exhaust valve @ 1.566. Intake @ 2.037 The rest is what is listed today by NHRA in the newer books The 2 four version is 390 HPand uses 2 each 4160 Holley carbs same head specs as above and a Hydraulic .481 cam. The spring pressures and duration/overlap specs I have listed dont matter for today's NHRA rules for either one. Last edited by X-TECH MAN; 01-05-2011 at 09:46 AM. |
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01-05-2011, 01:07 PM | #9 | |
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Re: OLDER ENGINE SPEC's
Quote:
How about 1970 dodge 383 in a challenger RT....the old stocker might just be pure stock legal! Valve spring pressure would be great to know. Thanks again Eric
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Eric Merryfield 1883 STK |
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01-05-2011, 01:56 PM | #10 | |
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Re: OLDER ENGINE SPEC's
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1970 Dodge 383/335 HP 1 4 barrel Holley 4367 or 4217/sm 4369 or 4218/Auto Manifold casting number 2951666 1.5 Rockers Hydr. cam Head CC's 79.5 Casting Numbers 906, 346, 213, 452, 902, 975, 187 Deck .004 Flat top piston Head gasket .021 Single spring ( With Dampner) 128 lbs pressure on the seat 248 lbs open pressure Cam: zero checking clearence Intake 352 degrees .455 lift 150 degrees overlap Ehaust 380 degrees .470 lift Intake valve 2.080 Exhaust valve 1.740 Alt carbs 4667, 8, 88, 4734, 5, 6191 or 3 Last edited by X-TECH MAN; 01-05-2011 at 02:23 PM. |
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