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03-16-2010, 12:26 PM
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CC Member
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Join Date: Dec 2009
Location: San Carlos, Carmel,
CA
Cobra Make, Engine: Kirkham #625 427S/C, 468 ci Al block, 615 HP
Posts: 100
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Not Ranked
KMP625 has an engine!
I picked up my engine this weekend, built by FE Specialties in Sacramento. It is an aluminum Shelby block, Shelby intake, Performer RPM heads, medium Crower cam and 468 displacement. For carb we chose the 830 Holley 4150 (chokeless) with annular boosters. The carb works well with the porting; after some jet changes it dyno'd at 615HP at 5800 rpm, 640 lb/ft at 4200 rpm with 90% of the peak from 2800-5600 rpm. It looks great sitting on my garage floor; I'll be sorting out plumbing & accessories and hope to install in about 2 weeks.
Thanks to a number of you for suggestions and advice, and particularly to Tom Kirkham for carburetor advice.
Mark
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Advertising
03-16-2010, 01:58 PM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
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Not Ranked
Quote:
Originally Posted by Mark Thompson
I picked up my engine this weekend, built by FE Specialties in Sacramento. It is an aluminum Shelby block, Shelby intake, Performer RPM heads, medium Crower cam and 468 displacement. For carb we chose the 830 Holley 4150 (chokeless) with annular boosters. The carb works well with the porting; after some jet changes it dyno'd at 615HP at 5800 rpm, 640 lb/ft at 4200 rpm with 90% of the peak from 2800-5600 rpm. It looks great sitting on my garage floor; I'll be sorting out plumbing & accessories and hope to install in about 2 weeks.
Thanks to a number of you for suggestions and advice, and particularly to Tom Kirkham for carburetor advice.
Mark
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I'm taking mine back to Tom for a rebuild now. I've got 605 HP/613 TQ on a 482ci engine.   
Good luck Mark. We hope to see you soon at Cobra breakfast.
P.S. My 850 carb wasn't ported. |
03-16-2010, 02:10 PM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
Hey guys,
Why the rebuild?
What sort of mileage/use/issues are you having?
Thanks,
rodneym
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03-16-2010, 02:27 PM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
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Not Ranked
Rodney, I was being sarcastic, since Mark's engine will have more HP and TQ than mine and they're both almost identical engines, built by the same guy, except for the carb and my LARGER displacement.
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03-16-2010, 03:09 PM
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Banned
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Join Date: Oct 2003
Location: Yorba Linda,
CA
Cobra Make, Engine: SPF w/392CI stroker
Posts: 3,293
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Not Ranked
Stop your *****in' and go buy a bigger/better carb. Or a 200 shot.  |
03-16-2010, 03:11 PM
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Super Moderator
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Join Date: May 2001
Location: Fresno,
CA
Cobra Make, Engine: KMP 184/482ci Shelby
Posts: 14,441
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Not Ranked
That is great news, Mark...really happy for you.
Hurry up...the weather's perfect!
__________________
Jamo
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03-16-2010, 04:17 PM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
Rodknock,
Ok, I feel better now.
And I thought my son is too literal. 
rodneym |
03-16-2010, 04:41 PM
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CC Member
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Join Date: Jan 2002
Location: Santa Rosa Valley,
CA
Cobra Make, Engine: Kirkham KMP500 LeMans- Roush 451 Shelby block; KMP Flip-top with cammer: KMP 289 Bronze under construction.
Posts: 285
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Not Ranked
Hi Mark, Great news! Post some pictures after KMP625 gets a heartbeat.  |
03-20-2010, 08:47 AM
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CC Member
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Join Date: Dec 2009
Location: San Carlos, Carmel,
CA
Cobra Make, Engine: Kirkham #625 427S/C, 468 ci Al block, 615 HP
Posts: 100
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Not Ranked
Rodknock
I would guess that the difference is the carb, not that 10 or 20 HP here or there is noticeable at these P/W levels. I originally asked Tom for 550HP and excellent light throttle driveability ( go ahead, call me a girly man...) and that was what he modeled the build on. The output exceeded target by 65 HP, but I switch carbs on him after consultation with Tom K who was pretty persuasive regarding both annular boosters and chokeless.
I have a temporary operating permit until 4/30 which I am using as a deadline to get it together and driveable. I look forward to meeting you guys once I have the appropriate hardware to come to a breakfast.
Mark
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03-20-2010, 08:53 AM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Santa Cruz,
CA
Cobra Make, Engine: SPF 2613 Titanium w/Black, Roush 402SR
Posts: 4,097
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Not Ranked
Sounds great Mark! Look forward to seeing your car when it's done.
__________________
Doug
No stop signs, speed limit - Nobody's gonna slow me down - Like a wheel, gonna spin it
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