Racing Log?
 

Would it be against any rules/would anybody be interested if I started a thread highlighting our trips down the track? I already do it at a forum I moderate, I can copy the posts her if there is interest.

I ask, because it's not exactly a mopar... (68 camaro)

It was built as a nitrous car, we striped it down to an all-motor 427. We kinda hurt it, plus it had weak valve springs and wasn't holding pressure. So after a trip to Reher-Morrison Racing engines all of 5 miles away, it's now a 505 cubic inch rat. The first video below, was provided by the builder of the car, in Georgia.

New package: Scat 4140 Forged steel 4.25 Stroker Crank, Callies Comp-Star H Beam Rods, Ross 14:1 Compression Pistons, Erson Reher-Morrison Spec Camshaft, Comp Cams Roller Lifters, Manley Timing Chain, 4.350 Bore (.100 over).

our NHRA registered car number is 494. The 426 Street Stock/Hot Rod was the previous owner's NHRA/IHRA number. Long story, but the car has had 4 owners, but we're only the second owners to take it down the track.

Existing thread: http://www.racing-forums.com/vb/showthread.php?t=34644

http://www.magnethead494.com

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[youtube]Rva6zIly-Qw[/youtube]

[youtube]ytmko3gaF-g[/youtube]

It's cool with me, but just be careful about the forum links. As far as I know, we have no problems with racing forums, but I could be wrong.

I wouldn't think there'd be, 2 completely different realms. I know the admins here and blocked off a few, but because of overlap conflict..I admin RF (one of 5 admins, we split operating cost) so i'm sure I'd know if there were (I'd hope)

No runs at the track for me. The closest is 2 hours away. I've ran 3 people on back roads though. :)

W 90's Nissan 240 SX (Mild mods)
W 90's Nissan Altima (Mild mods)
L New Mustang GT w/ some kind of kit (Got me in 1st, started to catch him at the end of 2nd, just as I started in 3rd, had to slow because of a car.)
L Same as above

Found out chrome timing cover doesn't fit double roller chain. Other than that, has been fairly simple. The Spira-loc's for the wristpins were aggrivating at first. Four of them per piston is a tad tedious. Not to mention 6 rings per piston (4 oil rings, 2 compression rings).

Checking endplay. Turned up around .008"

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Four of the 6 total piston rings:

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Putting in the Spira-lox:

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Checking lift, timing, and duration of the cam:

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Valve-Piston Clearance:

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Well, half of the short block is done. Put 4 more pistons in it, and we can start on the valvetrain.

Here's what I come up with for compression ratio. The pistons claim to be about 14:1.

4.25" stroke (verified from TDC to BTC using caliper)
4.350" bore (verified with caliper)
51cc dome on piston (per Ross)
121cc combustion chamber (per DART)
.041" head gasket (our choice)

Volume of cylinder = pi-r-squared-height
raw cylinder volume = 3.141591 * ((4.350/2)^2) * 4.25 = 3.141591 * 4.730625 * 4.25 = 63.16217792859375 cubic inches
combustion chamber volume = chamber volume = 121cc
head gasket volume = 3.141591 * ((4.350/2)^2) * .041 = 3.141591 * 4.730625 * .041 = 0.60932956662241684118679603655609 cubic inches

Compression ratio = everything (BDC) divided by something (TDC), with combustion chamber cc including gasket due to zerp deck height
= (((63.162.... ci - 51cc) + (121cc + .6... ci )) / (70cc + .6... ci))
= (((60.04996697859375 ci) + (121cc + 9.98512261 cc)) / (70cc + 9.98512261 cc))
= (((60.04996697859375 ci) + 130.98512261 cc) / 79.98512261 cc)
= (((60.04996697859375 ci) + 7.9932026 ci) / 79.98512261 cc)
= ((68.04316957859375 ci) / 79.98512261 cc)
= ((68.04316957859375 ci / 4.88099165 ci))

= 13.940439660164907268382645153675:1 compression.



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So, here's our schedule, subject to change:

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Fri, Aug 20 get the long block assembled, prime oil systems, check for leaks

Sat, Aug 21 install motor plates, get engine in the car

Sun, Aug 22 Fire 'er up and break in the camshaft (20 minutes at 2000 RPM)

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Wed, Aug 25 Test and Tune, Kennedale (if all goes well, just half passes)

Fri, Aug 27 Test and Tune, Kennedale (assuming convertor is tight enough based on Wednesday's test)

Sat, Aug 28 Pro-Mods at Crandall (Dallas Raceway)

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Wed, Sept 01 Test and Tune, Kennedale

Fri, Sept 3 Test and Tune, Kennedale

Sat, Sept 4 Pro-Mods at Crandall (Dallas Raceway)

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Wed, Sept 8 TBD

Fri, Sept 10 TBD

Sat, Sept 11 TBD

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Wed, Sept 15 TBD (Possibly Test and Tune, Kennedale)

Fri, Sept 17 Pro-Mods at Kennedale

Sat, Sept 18 No Action

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Wed, Sept 22 TBD (Probably no action)

Fri, Sept 24 TBD (possibly test passes, Outlaw Top Sportsman)

Sat, Sept 25 5.80 Index Race at Crandall For Sure, Weather Permitting

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Nothing but Testing, if anything

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Sat, Oct 30 1/4 Million Dollar Bracket Race at Crandall (Dallas Raceway)

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Engine is in.

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