KC SBF 427 Dyno?

[cwisenheimer]

Keith,

I see your company is offering a small block (Dart) Ford based 427. Considering that the 408W from KC is rated from the low-to-mid 500's for hp and tq, I was wondering if you'd had a chance to dyno one of the SBF 427's. If so, can you give us a ballpark on the hp and tq figures?

Thanks,

Curtis

[ERA Chas]

It's still at the top but we'd love to know - are you on vacation Keith?

[CoupedUp]

I have a KC 427W and Keith's dyno numbers came out to 479.5HP and 609 LB-FT of torque. I'm running a Performer RPM intake because of hood clearance issues with the coupe.

Doug, SPC0088

[ken swart]

I have a K C 427 sb in my superformance mk III, dynoed at 617 h p and 600 lb ft.
torque peak was at the start of the pull, 4700 rpm. so it may make even more. H p peak was 6000

[Keithc8]

We have dyno sheets on several of these from carbureted to fuel injection. We now have dyno sheets posted on our website at www.keithcraft.com. The standard 427 engine with about 10.3 to 1 compression with our middle hydraulic camshaft makes about 580HP and 565 ft/lbs of torque. We have these engines go over 600HP with a little bigger camshaft and a up-grade on the heads. We also do a high-rev lifter option for about 200.00 that lets the engine rev higher to like 6800-7000rpms with hydraulic roller lifters and take the HP up as well. We have done some with the dual plane intake and a smaller camshaft and still make 560HP and about 580 on torque.
We custom build our engines for each customers wants and needs, not just a cookie cutter engine. Hope this helps some and fell free to call with any questions. Thanks, Keith Craft

[CoupedUp]

I have about 8,000 miles on my KC 427w now and love it! On track days, all I hear is, "That is the best sounding car I have ever heard." It runs and sounds incredible!

Thanks again Keith & Co.!
Doug

[ou812545]

Doug and others, How much oil does your KC 427w engine go through?
I have a 418W and I burn 1 quart every 200 to 300 miles. People with strokers tell me that is just a trait of the stroker engines. Is that true?

[Slick61]

I had a problem with excessive oil consumption (last fall) on my KCR 427w... was sucking down about a quart every 130 miles. Turned out the PCV valve was pushed down against the baffle inside the valve cover (which is washed in oil). After removing the PCV, oil consumption has stopped... no loss at all. Runs great... fabulous engine.

[ou812545]

Slick61,
Did you replace the PVC or get rid of the PVC all together?
If so, what did you replace the PVC with?

I'm willing to try anything.

Thanks,
Dan

[bobcowan]

Originally Posted by ou812545

Doug and others, How much oil does your KC 427w engine go through?
I have a 418W and I burn 1 quart every 200 to 300 miles. People with strokers tell me that is just a trait of the stroker engines. Is that true?

Not true. I don't burn any.

[Slick61]

Originally Posted by ou812545

Slick61,
Did you replace the PVC or get rid of the PVC all together?
If so, what did you replace the PVC with?

I'm willing to try anything.

Thanks,
Dan

I just pulled it off altogether... I don't have to worry about smog, so no biggie. I suppose I COULD have tried just pulling the PCV up off of the baffle, but I removed it completely & stuck another breather in the valve cover... an easy $5 solution. I don't have any issues yet with oil misting the valve covers or anything. The fumes may be slightly more noticeable, but since I'm sitting right beside the sidepipe outlets, it's REALLY hard to tell.

[cobra cowboy]

I have one of those KC 427 620 hp engines. Man does it make power and yet it is very streetable.
Thanks KC

[Slick61]

Originally Posted by Slick61

I had a problem with excessive oil consumption (last fall) on my KCR 427w... was sucking down about a quart every 130 miles. Turned out the PCV valve was pushed down against the baffle inside the valve cover (which is washed in oil). After removing the PCV, oil consumption has stopped... no loss at all. Runs great... fabulous engine.

... I spoke too soon. I checked it last night & oil level is down again. My recurring theme is... The oil level doesn't move for the first 300-600 miles after an oil/filter change... then it starts dropping like a stone. Will see if this trend continues...

[reed1951]

I wonder how many people have this problem? I was actually thinking of a daily driver type stroker application for my truck, you know, try to get the infamous 100,000 out of it if I could. I have herd of strokers using oil caused the oil ring intersecting with piston pin and/or how the engine was built (pro or joe builder). I also now I shouldnt let a few threads I see online stop me from getting something I want but it does make me think if I would have to put a quart of oil in my engine every 300 miles because of consumption thats rediculous. But I do not know your engines or how you guys use them...do you race your car alot? or is it just a cruiser? I guess I could understand oil consumption on a "race" driven car.

[Keithc8]

We do not have many complaints of the stroke 351W engines using oil. The wrist pin does not go into the oil ring on these stroker combinations. I do feel that the way we use our Cobra that they might be prone to use a little more oil than normal because we never crank them up and go for 1000 to 2000 miles a trip. The cars get started and driven a little and then parked but still not many problems.
I have one customer that was buying the 408 and the 427 stroker engines and putting in his 10,000 pound plumbing vans because the orignal 351W did not have enough power. He put a lot of miles on them in CA. Thanks, Keith

[reed1951]

Thanks for the reply keith. Having to put a quart of oil in it that often as these guys described would suck but if it realy isnt an issue with engines that are driven more often like mine would then great! thanks frank

[Slick61]

Just a clarification... I don't think that the oil consumption issues I've experienced are related to the engine itself... I've been looking into it a bit, and think I may be drawing oil into a cylinder from an adjacent oil passage, due to a bad/damaged head gasket. Am not sure how many times the heads were pulled prior to my ownership (and IF the head gaskets were replaced), so anything is possible. And driving habits/style DO appear to affect the severity of the condition.

make no mistake tho... it's a great engine... and yes, it sounds amazing.

[jshel1]

See the Keith Craft Motorsports dyno in action from last Saturday...

http://mysite.verizon.net/res909nt/jshel1/

click on KCM Car Show 2008.mov

Camera/Microphone just didn't do it justice... 460bb bored and stroked on this cobra.
Rob Camp on the "waa-waa" pedal.

[CoupedUp]

Originally Posted by Slick61

Just a clarification... I don't think that the oil consumption issues I've experienced are related to the engine itself... I've been looking into it a bit, and think I may be drawing oil into a cylinder from an adjacent oil passage, due to a bad/damaged head gasket. Am not sure how many times the heads were pulled prior to my ownership (and IF the head gaskets were replaced), so anything is possible. And driving habits/style DO appear to affect the severity of the condition.

make no mistake tho... it's a great engine... and yes, it sounds amazing.

Let me know if you find out the source of the problem as I am experiencing usage of about a quart every 150 miles or so... I have about 10k miles on he engine and have no other problems. I have one plug that is constantly gunked up and suspect I am drawing oil into that cylinder.

Doug