Block - Cleveland DOAE - 4.030 torque plate bored and honed, zero decked, line honed, semi grouted, lifter bores honed, Moroso oil restrictor kit, ARP mains bolts,
Pistons: 4.030 SRP forged (13cc dish), HPC ceramic coated skirts and tops. Total Seal file back rings (13cc dish)
Rods: Scat H Beam, ARP 8740 Bolts
Crank: Scat 9000 Cast, Fully Balanced
Sump: Original Cleveland Style, modified by ASR with baffles, windage tray and scraper, as well as an ASR oil pick up…
Heads: Cast Iron Closed Chamber 4Vs. Alloy tongue inserts, lightly ported and cleaned up, 60.5cc chambers. Static Compression Ratio is 10.7:1. Stainless Steel 4V valves, 3 angle valve job, Comp Cams 930 dual springs (155lb on seat, 375lb open), Comp Cams 10 degree locks, Tool Steel retainers, Viton seals, installed at 1.9”
Comp Cams Magnum Ultra Pro roller rockers, Comp Cams 80 thou wall 5/16 pushrods, Guide Plates. ARP head bolts.
These Tongued 4V heads flowed 325 CFM @ .750” lift (655HP) on a superdyne flow bench. (313 CFM @ .600 lift)
Inlet manifold – Scott Cook Motorsports dual plane, match ported to 4Vs…
Cam: Wade Solid Flat tappet & Comp Cams EDM lifters
302 intake /314 exhaust degrees at the lobe (or 6 thou?)
286/297 degrees Advertised @ .020 thou
248/258 degrees @50 thou
.618/.628 lift (.597/.606 lift at the valve)
108 LSA
Intake Centreline 104, Exhaust Centreline 112 (i think its installed at 104)
Timing Events @ 006 thou
Intake 46 Btdc 76 Abdc
Exhaust 88 Bbdc 46 Atdc
@ 006 thou - 92 Deg Over-lap
Timing Events @020 (Apparently most cam companies measure advertised timing at 20 thou?)
intake 39 BTDC 67.5 ABDC
exhaust 80 BBDC 37 ATDC
@20 thou - 76 degree overlap
Timing Events @050
Intake 20 Btdc 48 Abdc
Exhaust 61 Bbdc 17 Atdc
@50 thou - 37 - Deg Over-lap
Specs are similar to Crane f246 and Ford Motorsport A342, but with more lift to feed the extra cubes.
Carb: QuickFuel Q850 (Jets - 72 primary, 78 secondary) 4.5 Power Valve. This carb originally had 76/86 jets, running with the 3” X Pipe exhaust (now twin 2.5”). The unburnt fuel fumes were unbearable.
3/8 Fuel Line with RobMC 550HP pump (this pump is rated at 550HP, but with a ½ inch fuel line)
Ignition: Ford Autolite converted to electronic with optical trigger, using an MSD digital 6AL and MSD Blaster 2 coil for spark. This looks identical to a Ford points dizzy. 7mm leads…
Timing - 24 degrees initial, 29 degrees total (all in by 3500RPM)
Exhaust: Pacemaker 4 into 1, 1 ¾ “ primaries into 3” collectors. Mandrel bent dual 2.5” system, 2 x 16” chambered mufflers, into 2 ¼ over the diff, with 2” tips as original GTs had…
Driveline: Exceede steel flywheel, custom made 9” twin plate clutch, rebuilt wide ratio Top Loader, Fully rebuilt 9” with 3.25 LSD, with steel hat.
Dyno ResultsFor the dyno, we used Pacemaker 4 into 1 extractors, 2” Primary into 3.5” collectors
The first carb used was a Holley 830 double pumper - Ignition was set with 21 initial to 30 degrees timing.
The result was 512HP @ 6000RPM & 471 ft/lb@4700RPM
Air Fuel ratio was 14.02:1 (A little high for the tuner’s liking, so we swapped carb)
The next carb was a Holley 950 HP Double Pumper (Jets - 79 primary/86 Secondary)- with 21 initial to 30 degrees total timing.
After a warm up, the result was 535HP @ 6000RPM & Torque spiked to 529 ft/lb@4700RPM, then went down, then came up again - this was an inaccurate reading (See pic)
Air Fuel Ratio was 11.5:1
We re-set the rev limiter to 6500 - Timing stayed the same (21 initial to 30 degrees total)
The result of this change was 549.6HP @ 6500RPM & Torque was 505.4 ft/lb@5300RPM
Air Fuel Ratio was around 11.5:1
We re-set the rev limiter to 6800 - Timing stayed the same (21 initial to 30 degrees total)
The result was 557.7HP @ 6800RPM & Torque was 508.6 ft/lb@5400RPM
Air Fuel Ratio was around 11.5:1
On a cool night, it ran a best time of 12.34@116.5mph. This is with 3.25 diff gears and 205/70 14 tyres.
It was my first time drag racing, so i need to practice how to get it off the line…
https://www.facebook.com/video.php?v=10154337874215693
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