545ci Ford in a 2003 Cobra - 460 Ford Forum
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post #1 of 14 (permalink) Old 03-30-2019, 09:20 PM Thread Starter
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545ci Ford in a 2003 Cobra

Finally starting my build 545ci, kaase p51 heads aprox 12:1 comp, want to put a T56 manual behind it but think the torque will kill it so an auto will go in, is there a hydraulic roller cam that's big enough to feed it or dont **** around and get a solid roller? car will be alot of street and an occasional nmra weekend
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post #2 of 14 (permalink) Old 03-30-2019, 09:22 PM Thread Starter
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any tips on a 545ci?
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post #3 of 14 (permalink) Old 03-30-2019, 09:29 PM
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use a solid roller

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post #4 of 14 (permalink) Old 03-30-2019, 09:51 PM
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use a solid roller
Rich, which lobes from comp do you like to use?

Cheers, Bob
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post #5 of 14 (permalink) Old 03-30-2019, 09:54 PM
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any tips on a 545ci?
How much hp/tq you after?

What rpm you after?

Pump gas?

Cheers, Bob
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post #6 of 14 (permalink) Old 03-30-2019, 10:59 PM Thread Starter
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would like to see 800 hp and 750 to, race gas hopefully probably produce a little more but with 12.1 compression it would need race gas, what compression can you get by with on pump gas? and if you go with a big roller cam it will want high compression correct?, appreciate everyone's input, built some Cleveland's back in the 80's.
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post #7 of 14 (permalink) Old 03-31-2019, 02:03 PM
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I’d think that a Magnum T56 should live behind your 545 (I’ve got a Magnum to go behind my AFR headed 545) but consistency on the drag strip would suffer. As for street driving a C6 would mean a higher cruise RPM with no overdrive so that’s something to consider also.
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post #8 of 14 (permalink) Old 03-31-2019, 06:03 PM
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would like to see 800 hp and 750 to, race gas hopefully probably produce a little more but with 12.1 compression it would need race gas, what compression can you get by with on pump gas? and if you go with a big roller cam it will want high compression correct?, appreciate everyone's input, built some Cleveland's back in the 80's.
With the right cam and combo 12.1 will run on pump gas, give KAASE a call he will set you in the right direction.

800hp in a cobra will be a handfull, but sure will be fun.

Cheers, Bob
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post #9 of 14 (permalink) Old 04-01-2019, 12:32 AM Thread Starter
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Thanks bud, will do. with my cobra engine had aprox 4500 invested in heads and cams so 2600 is refreshi
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post #10 of 14 (permalink) Old 04-03-2019, 03:28 PM
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If you have e85 readily available in your area, run some compression and feed it e85. It's much cheaper than 100+ octane jug or barreled fuel.

I built a 13.x:1 408 Windsor and run e85 in it with no problems through a Holley Terminator throttle body setup.

The two downsides to e85 I have found is the blend consistencies are checkered depending on the station/pump and the lack of thermal energy in it means you gotta burn more of it to go the same distance. (And the funky smell...I guess that's a third downside, depending on one's perspective)


I would run a 4L80e in the car. Heavy? Yes, but durable and adds a lock-up converter and overdrive that the c6 doesn't have. I have built many 4L80s and they are excellent units.
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post #11 of 14 (permalink) Old 04-03-2019, 05:18 PM
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Can't offer any advice, but why a BBF over the S/C 4.6l in a Terminator?

800hp is easy with a stock 4.6. Just add bigger blower of choice and a few supporting mods. Did you get the car with no motor/blown up motor?

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post #12 of 14 (permalink) Old 04-05-2019, 08:17 AM
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Your combo sounds good . I have a552 built by Jet Boat Bob with P51 heads Ford SVT block a Lem Evans Custom Comp cam. Heads were flowed by Charlie Evans and flowed 411 cam 728 lift , ford intake . Dyno at Autimotive Machine & Performance in KY. Hp 752.6 @6200 torque 717 on race fuel , forgot to mention 10.1 compression on a 2 bbl carb !!!!!!!!!!!!! No just kidding on the 2 bbl a dominator 1150 and no NOS. When I called Lem up I told him I wanted a engine combo with the P51 heads and big HP but wanted to run on pump gas !! He laughed at me !!😂😂😂 I told him I was serious that I was building a 1966 Pro Street Fairlane and wanted 700 HP on pump gas . We got with Bob ( he laughed too) but built this combo which I can run 50- 50 93/and race gas. My car should be finished by the end of year, can’t wait to turn that Beast loose !! Good luck with your build
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post #13 of 14 (permalink) Old 04-05-2019, 12:00 PM
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Your combo sounds good . I have a552 built by Jet Boat Bob with P51 heads Ford SVT block a Lem Evans Custom Comp cam. Heads were flowed by Charlie Evans and flowed 411 cam 728 lift , ford intake . Dyno at Autimotive Machine & Performance in KY. Hp 752.6 @6200 torque 717 on race fuel , forgot to mention 10.1 compression on a 2 bbl carb !!!!!!!!!!!!! No just kidding on the 2 bbl a dominator 1150 and no NOS. When I called Lem up I told him I wanted a engine combo with the P51 heads and big HP but wanted to run on pump gas !! He laughed at me !!😂😂😂 I told him I was serious that I was building a 1966 Pro Street Fairlane and wanted 700 HP on pump gas . We got with Bob ( he laughed too) but built this combo which I can run 50- 50 93/and race gas. My car should be finished by the end of year, canít wait to turn that Beast loose !! Good luck with your build
I'm building a similar combo with similar goals. What do you mean by this? I will have 10.1:1 compression with ported SCJ heads and want to run on straight 93 octane.

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post #14 of 14 (permalink) Old 04-06-2019, 08:41 PM Thread Starter
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Thanks guys, I have done the 4 valve cobra motor with small to large superchargers and was in the process of putting a Bullseye 83mm on it when hit a financial problem and sold the engine and drivetrain out of it, been sitting on jackstands for 2 yrs
so I'm doing something different now and excited about big cubes
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