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07-06-2006, 09:49 AM
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CC Member
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Join Date: Apr 2006
Location: Fulshear,
tx
Cobra Make, Engine: Lone Star Classics (LS427)
Posts: 64
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Not Ranked
How Much Is Too Much?
I am trying to decide on a HP range for my cobra build. I am very curious to know what the HP is in other cobras and how those cars hook up? The anticipated HP for my build is 430 HP. Any 1/4 mile times corresponding to your cars make (FFR, LSC, Unique....etc), HP, rear end type/ratio and tranny would be perfect.
Thanks,
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07-06-2006, 11:39 AM
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CC Member
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Join Date: Jan 2002
Location: Northern California,
CA
Cobra Make, Engine: -Sold- Contemporary 427S/C # CCX-3152 1966 427 Med Rise Side Oiler, 8v 3.54:1 Salisbury IRS, Koni's.. (Now I'm riding Harleys)
Posts: 2,567
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Not Ranked
Most Cobras in Texas have 800-900 rwhp.  430 hp with a drive train loss of 15% should net you 365 rwhp and will get you into the low 11's provided you can get the power down and can drive.
__________________
michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
Last edited by SCOBRAC; 07-06-2006 at 11:42 AM..
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07-06-2006, 05:20 PM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
"How Much Is Too Much? "
Too much ain't enough.
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07-06-2006, 07:25 PM
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CC Member
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Join Date: Feb 2006
Cobra Make, Engine: SPF 1421
Posts: 237
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Not Ranked
Buy as much as you can afford. Just my humble opinion.
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Joe S.-LI Lake Grove
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07-06-2006, 07:40 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
ca
Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
Posts: 1,435
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Not Ranked
When you can leave rubber from one corner to the next corner is JUST RIGHT anything more is too much 
__________________
Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong. 
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07-07-2006, 06:15 AM
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Senior Club Cobra Member
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Join Date: Feb 2006
Location: McKinney,
TX
Cobra Make, Engine: SPF #867 gone....
Posts: 1,272
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Not Ranked
Mine is a 392 crate rated at 430 hp, which nets me 359 hp at the rear wheels. I have a 3.73 rear end, which puts me at 4000 rpm at 120 mph (see photo in my gallery) and a stock Tremec TKO. I have 335 Michelin Pilots out back and the only way first gear will hook up is to release the clutch over about a full second. Second gear gives more than a chirp, but if the tires are warmed up well, I can reduce that to just a chirp. Third gear will chirp is the tires are not hot. I thought I wanted more power, but this combo is really fun. Totally streetable, not a pain to drive, doesn't overheat (engine or cockpit) and I can still embarrass just about anything out there. I didn't think I'd like the tall rear end gear, but I really do. Gives it such quick pop redlight to redlight. Haven't had it on the track, so don't know it's manners at the limit.
Hope this helps!
__________________
MadMiles442 
She said, "The only thing I'll ask of you, you gotta promise not to stop when I say when..."
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07-07-2006, 06:40 AM
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CC Member
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Join Date: May 2002
Location: Syracuse,
NY
Cobra Make, Engine: Contemporary classics 3041,sbc 350(have no fear ford guys for there is a FE 428 in the garage waiting to be rebuilt & installed) but for now she is a driver while other projects take precidence.
Posts: 405
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Not Ranked
Quote:
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Haven't had it on the track, so don't know it's manners at the limit.
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Cobras in general do not have manners.........as far as I can tell. 
Have a good one,
Dan
__________________
THOUGHT FOR THE DAY: There is more money being spent on breast implants and Viagra than on Alzheimer's research. This means that by 2030, there should be a large elderly population with perky boobs and huge erections and absolutely no recollection of what to do with them.
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07-07-2006, 08:17 AM
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CC Member
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Join Date: Mar 2002
Location: Plantersville,
TX
Cobra Make, Engine: Self Built, 427 USRRC, 427FE, Toploader
Posts: 583
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Not Ranked
Lawler,
The FE 390/408o/410o/416o/428 (noted over bores) are fine items with a selected hydraulic cam package, alum intake and carb, electronics ignition, alum flywheel, etc........... for a very stable 400-420 HP and have the manners of a an old Ford Pickup as far as durability and cranking running manners.
With proper suspension and tires, 90% of the small blocks cannot touch them in the 0-100 range.
grumpy
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07-07-2006, 11:18 AM
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CC Member
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Join Date: Apr 2006
Location: Fulshear,
tx
Cobra Make, Engine: Lone Star Classics (LS427)
Posts: 64
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Not Ranked
All very good info. I appreciate it. I was just about to pull the trigger on a 351W too. 
Thanks, |
07-07-2006, 05:10 PM
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CC Member
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Join Date: Dec 2003
Location: Murphy,
TX
Cobra Make, Engine:
Posts: 413
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Not Ranked
Quote:
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Originally Posted by Madmiles442
I thought I wanted more power, but this combo is really fun.
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Give it time! Hee hee. Once upon a time we thought our 392 was fun. And it was. But the KCM 418 we've got is that much more fun! 
Colleen |
07-07-2006, 05:21 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Meriden,
CT
Cobra Make, Engine: ERA 427 SC s/n 718, 428 FE
Posts: 1,726
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Not Ranked
You're on the right track...too much more HP will make the car a pain in the ass to drive.
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07-07-2006, 05:21 PM
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Senior Club Cobra Member
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Join Date: Feb 2006
Location: Syracuse,
NY
Cobra Make, Engine: BDR 228, Roush 342R, 457HP/428TQ, modified AOD
Posts: 1,378
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Not Ranked
Note my signature below.
Cheers!
Dave
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Dave
Nolite id cogere, cape malleum majorem - Don't force it, get a bigger hammer.
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07-07-2006, 05:31 PM
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CC Member
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Join Date: Sep 2003
Location: Spicewood,
TX
Cobra Make, Engine: CSX4853, Roush 451FE
Posts: 268
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Not Ranked
I would try for something in the middle. Somewhere between Insane and Ludicrous . My car is just a 351W with about 400hp at just under 2200 lbs, it is insane.
Run the power to weight ratio and any of these cars and they are in Supercar territory.
Now I'm used to insane, I'm wishing for more
Randy
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68 Hertz~09 KR~FFR Coupe~CSX4853
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07-07-2006, 06:00 PM
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CC Member
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Join Date: Jul 2005
Location: Tulsa,
ok
Cobra Make, Engine: Lonestar, 427 Center Oiler
Posts: 352
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Not Ranked
My 427 center oiler down 400 RWHP and it was off the chart rich. I think I've fixed that so am hoping for 420+? The car is easy to drive, and almost seems mild, really not too scary, anymore. Guess I've gotten use to it.
My lonestar has the std 3.70 9" rear w/a 3550 tremec. I don't like the gear combo much. 1st and 2nd too low, 5th too high. I don't think the car will go over 125 w/ the current gears. Not that I worry about that too much.
On poor street tires, no power shifts, etc I only ran a 12.7 at 114 mph. Track was sticky too, but 2.0+ 60' times. So no, I probably can't drive too well. Still have to roll through 1st and 2nd. Is it enough? Not hardly. I think it would still be controllable enough w/ 500 at the wheels.
I think the TWM injection would be the ticket......
Mat
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07-07-2006, 06:02 PM
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CC Member
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Join Date: Aug 2002
Location: Dacula, (Atlanta),
GA
Cobra Make, Engine: Unique 427 SC, Southern Automotive 427W Stroker
Posts: 1,649
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Not Ranked
I went from a stock stroke 351 to a 427 Windsor stroker. I can say from experience that "more is better".
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After a good hard ride.....oil pressure is over 50, temp is below 190, she idles and no new dents. LIFE IS GOOD!
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07-11-2006, 04:05 AM
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CC Member
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Join Date: Jun 2003
Location: Australia,
Zzz
Cobra Make, Engine: Shelby alum 468 block
Posts: 14,974
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Not Ranked
Mmmm 400+ rear wheel and a 100 NOS system just for fun...
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Bernie Knight
KMS 427 #662 Shelby 468 CSX 1026
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07-11-2006, 04:08 AM
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CC Member
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Join Date: Jun 2003
Location: Australia,
Zzz
Cobra Make, Engine: Shelby alum 468 block
Posts: 14,974
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Not Ranked
Mmmm just enough
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Bernie Knight
KMS 427 #662 Shelby 468 CSX 1026
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07-11-2006, 05:54 AM
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Senior Club Cobra Member
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Join Date: Aug 2005
Location: Toronto, Canada,
Ont
Cobra Make, Engine: Shelby CSX 4995, Keith Craft built 427 SO
Posts: 1,168
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Not Ranked
I am running a 302/370 hp., 5 spd. and a 4.11 final drive. It is extremely quick! 1st gear is practically useless. 0 - 60 time is 3.5 sec. I will be opting for a 427 SO built by Keith Craft in my new car. I will be running a CR 4 spd. toploader with a 3.54 final drive. I have the feeling I will be learning to drive all over again! LOL
__________________
"The 427 Cobra is easily the highest performance car ever sold for street use. A decent 427 - not the worst, not the best, will go from zero to 100 mph and back down again to zero in less than 14 seconds. All thing considered, you can put together a pretty good argument that the 427 Cobra is the ultimate performance car, judged on any basis you want to name." Taken from; Corvette, The Sensuous American 
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07-11-2006, 06:12 AM
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Senior Club Cobra Member
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Join Date: Jan 2005
Location: VALLEY FORGE,
PA
Cobra Make, Engine: SUPERFORMANCE w DOUG MEYER ENGINE
Posts: 1,958
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Not Ranked
The engine size/power/drivablity question is partially a function of where you live. How much traffic, gridlock vs. open roads? All the power in the world won't do much good sitting in traffic. My car pretty much hates traffic.
Try and factor this into your selection of engines.
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07-11-2006, 06:14 AM
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CC Member
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Join Date: May 2006
Location: Tucson,
az
Cobra Make, Engine: BDR #123 351 ford crate eng
Posts: 20
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Not Ranked
greetings,
i have not purchased my engine yet, so that is why this forum is so helpful.
to those of you that have "tons" of horsepower, how often to you really use it? on the track is one thing, but street cruising, is 400+ HP overkill. the reason i ask is that i'm on a budget of about 10-11k for engine and tranny. if i budget 2500 for tranny, that leaves about 7-8k for the power. also, i will have to "contract" out my engine, for i do not have the expertise to build one. any suggestions for any engine that i can get for that amount and be THRILLED with?
thanks for your expertise and opinions,
JOE
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