Dyno run on Wednesday (4/20) ...
Here are the numbers for the Iron Block & Heads 302 (306ci):
HP 362 @ 6100rpm Torque 355 @ 4500rpm
Here is the rest of the story …
For those that have been flowing along, you know that I decided to work with Tom Lucas (FE Specialties) to build a motor well suited to a 'Street' 289 Cobra. After a few phone calls and emails, I went up to visit his shop in Sacramento. Tom's focus is FEs … but he also does small blocks and other motors as well. Along with Aluminum heads, he is an expert in working with Iron heads, really getting them to flow. We talked for quite a bit, going over the different parameters and trade offs involved, then went for a tour of the shop.
What I was looking for in a motor is essentially a rough modern equivalent of the venerable 289 Hi-Po that went into the a lot of the CSX2000 cars, GT-350's and the like back in the day. Wanted a vintage look, but did not necessarily need to be 'period correct'. A motor that will start and run well hot or cold, can handle idling in traffic and not 'fussy'. Iron block and heads 302, that runs well on pump gas and minimal maintenance other than
oil changes and plugs. My goal was around 300HP and 300 ft lbs.
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Below is some information and comments from Tom …
Here are some motor specs:
1. Camshaft:
** Duration intake 276, exhaust 282
** Duration at .050 int. 224 exh. 230
** Lift int. .513, exh. .513
2. Compression 9.8 to 1
3. Stroke- Stock 3.00
4. Bore- 4.030
5. CID 306ci
6. Head flow: Iron 302 head, 1970 casting: Fully Street ported: Intake 216cfm, Exhaust 182cfm
7. Valve Size: Intake 1.85, Exhaust 1.55
8. Intake: Blue Thunder Cobra Dual Plane Repop
9. Pistons: TRW Forged L2482-030
10. Sealed Power Moly Rings 5/64
11. Cloyes True Roller Timing set
12. Aviaid 9 quart
oil pan, pick-up and tray
13. RPM Range 2500-6400
14. HP 362 @ 6100rpm* Torque 355 @ 4500rpm.* 313 Torque @ 3000rpm
15. Distributor: Petronix Flame Thrower with Petronix Coil for that original look!!
16. Holley 650 cfm List 4777 DP Carb.
17. 1 inch phenolic open carb spacer!!
*
Red line is 6200rpm. Should not take it over 6600rpm due to the hyd roller cam!!
*
This small block has a great torque curve and a very balanced attitude!! Should drive very nicely and not give much up on the apexes of tight turns(313 torque at 3000rpm)
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… I really like the way the motor looks! It sounds awesome, especially at higher RPMs. Can't wait to get it into the car, the drivability should be excellent.
Tom was a pleasure to work with and needless to say I am very happy with the results!
Here are some photos:
