Thread: What do you think of this kit?

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Interesting. Looks like I might have to shop for some other stuff. Not looking for a monster motor, just something a step up from a decent 302 build.

Thanks for the input so far guys.


Don

Ok, how about these World Product heads?

TECHNICAL SPECS

Casting ID Number: I-058
Material: High density cast iron
Valve Seats: Intake (integral), exhaust (hardened)
Valve Guides: Integral cast iron
Spring Seats: Machined for 1.560" and 1.250"
Valves: Manley stainless steel valves in assemblies (inconel exhaust valves on marine applications)
Valve Diameter: 1.940" intake, 1.600" exhaust (11/32" stem)
Guide Plates: Special World part #830460-8
Rocker Arm Studs: Screw-in style
Rocker Arms: Adjustable rockers recommended. 1.6 ratio (use of 1.73 ratio will require elongation of pushrod holes)
Intake Runner: Standard port location
Exhaust Ports: Standard location (dual exhaust bolt pattern to accommodate large custom headers)
Spark Plug: 14mm 5/8" .460" reach tapered style
Valve Job: Multi-angle intake and radiused exhaust
Valve Cover Rail: Raised
Valve Angle: Stock 20°
Accessory Bolt Holes: Stock
50-State Emissions legal

Spring Specs
1.250": 100 lbs. @ 1.810", 300 lbs. @ 1.250", coil bind @ 1.200", max lift @ .570"
1.437": 125 lbs. @ 1.810", 340 lbs. @ 1.210", coil bind @ 1.160", max lift @ .600"
1.550": 200 lbs. @ 1.900", 480 lbs. @ 1.200", coil bind @ 1.150", max lift @ .700"

Head Flow
JR. @ .600 lift: 236 (intake), 169 (exhaust)

WINDSOR JR. Iron Heads
WINDSOR JR. Iron Heads

Don

I also have a set of 68-ish 302 heads that have had a little work done to them, but I figure what I will spend to get a good valve job on them could go toward something better.

Originally Posted by Itoldyouso

Not looking for a monster motor

Come on now Don, with deep gears and a stick, YOU KNOW you want a playtoy and I KNOW you want a playtoy. Fess up.

If there's one thing I've learned through all the years I've been playin' with this stuff, it is that the power is in the cylinder heads more than any other one component in the motor. I'll 'Sim the World heads for you, but first, allow me to ruin you with some really good heads.....

347 Ford, 4.030" x 3.400" with 5.400" rods and flat-top pistons.
Scat 93023 CAST STEEL crankshaft
http://www.summitracing.com/parts/SCA-93023/
Scat 25400912 forged I-beam rods
http://www.summitracing.com/parts/SCA-25400912/
SRP 140689 forged pistons, 5cc eyebrows
http://www.summitracing.com/parts/SRP-140689/
Trick Flow TFS-51494030-040 head gaskets, 0.040" compressed thickness.

Cut block deck height to 8.200" for zero piston deck height with the above components. Deck finish of 50 RA or finer for use with Trick Flow head gaskets, installed dry. 0.040" gaskets with zero deck will yield squish of 0.040".

Trick Flow TFS-51400010-CO1 aluminum cylinder heads. 2.02"/1.600", 185cc intake runners, 66cc exhaust runners, max valve lift 0.600".
http://www.trickflow.com/partdetail....1&autoview=sku

Edelbrock RPM or Weiand Stealth intake. High-rise, dual-plane with 750 double pumper of your choice.

CompCams 31-609-5 solid flat tappet cam, 1.6:1 rockers
http://www.compcams.com/Cam_Specs/Ca...?csid=827&sb=0

Full length headers, 1 3/4" primaries.

Static compression ratio 10.23:1 no matter what any other charts say.
Dynamic compression ratio with components used, 8.11:1
Volumetric Efficiency 101.0% @5500
Max BMEP 214.0 @5000

RPM HP TQ
2000 120 316
2500 155 325
3000 200 351
3500 265 398
4000 336 441
4500 404 472
5000 462 485
5500 501 478
6000 528 462
6500 545 441
7000 540 405
7500 534 374
8000 514 338

Don, World doesn't publish flow figures, so I can't Sim them. So, let's ease back on the wallet and use a set of Racing Head Service cast iron heads with 180cc intake runners....
http://www.summitracing.com/parts/CCA-35301-01/

And we'll pull back on the cam one notch to make a little more torque on the bottom and also to coordinate with the lift limit on these heads....
http://www.compcams.com/Cam_Specs/Ca...?csid=826&sb=0

RPM HP TQ
2000 128 336
2500 165 346
3000 215 376
3500 280 420
4000 346 454
4500 410 478
5000 466 489
5500 499 477
6000 518 454
6500 528 426
7000 520 390
7500 506 354
8000 475 312
Volumetric Efficiency 98.7% @5000
Max BMEP 212.7 @5000

I see that RHS fudges a little by using a 4.200" bore pipe to flow the heads, so you may want to figure back on the 'Sim numbers a little. But heck, even if you factor the numbers by .90, that's still 475 hp and 440 ft/lbs and that's certainly nothing to sneeze at. Just so you know, the TFS flow numbers were arrived at with a 4.030" bore pipe.

Yeah, I can't go nuts on the money spent on this project as I have only about 2.5 months to get it running and have a lot of other stuff to buy for the rest of the car (I'm redoing my 27 for the Billetproof Drags Oct 25th) so a lot of money will be going for parts for the car itself and some upgrades. I figured while I was freshening up the motor anyway I should consider adding some cubes and better heads. But it looks like the parts that would make any real difference are also costly.

The Drags aren't really a true competitive event, just a chance for everyday guys to run cars down the strip than normally wouldn't get the chance, so I don't need to build this thing for all out power. Maybe just some good 30 over pistons, some decent rods, a drilled stock crank, and my early heads rebuilt will be all that I can swing between now and then. Plus I have to buy a new 9 inch center section, upgraded SFI flywheel and clutch setup, slicks, etc, etc, etc.

I guess the old saying " Speed costs money, how fast do you want to go?" still holds true.

Don