i know that 400rwhp is about the most you want to throw a stock bottom end, but what is the weak link? pistons, rods, or crank? after i finish my build i would like to spray 100 shot or so 
what's the weak link?
- Thread starter 98COBRA281
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CobraRed_96_GT
Active Member
Limit is around 420-440rwhp - and that's on a car that sees it a lot, even tho spray adds gobs more torque than HP, it's not used every time you get on the throttle. The common giving point is the rods as they are powdered metal - and also the rod bearings if the oil is low. The crank isn't too shabby at all.
SaleenGT2001
Well-Known Member
blckstng96
Member
- Apr 13, 2004
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rods are the biggest pieces,then the rest follows.only thing going for the bottom end is the block haha.
twogts4us
15 Year Member
Pistons and Rods for sure. Cranks, even the simple cast ones like in the 2V, typically don't fail without some help...
I'd have no problem just upgrading the pistons and rods and leaving the cast crank alone...if funds were tight. But if you had the extra money, I'd opt for the Cobra (or 5spd Mach 1) forged crank.
I'd have no problem just upgrading the pistons and rods and leaving the cast crank alone...if funds were tight. But if you had the extra money, I'd opt for the Cobra (or 5spd Mach 1) forged crank.
flstang65
10 Year Member
use forged rods, pistons and crank, then put a girdle on the bottom end to avoid being the weakest link...goodbye!
yeah ive been looking into forged crank, rods, and pistons, anybody know any good brands, that wouldn't kill my saving's account
ive also been looking in 03/04 cobra cranks, but there 8 bolt, and then ill need to get a new flywheel too.....
If funds are that tight, just do the rod and piston combo with some good bearings, cobra HV oil pump and pick up tube, and put it all together. Could be well under 2g's for a 600hp capable street car that would last along time. Building the short block is the easy part. Its cramming the air is the hard part.
flstang65
10 Year Member
check coast high performance, livernois and eagle. there are several people out there that have good parts and good prices. sometimes if you call and talk to the people in person they will do like a 10% discount. also, IMO, a stock oil pump would be fine, just add a windage tray.
ive been looking into this oil pump, but IDK why the price is so cheap
Ford Racing M-6600-D46 - Ford Racing High Volume Oil Pumps - summitracing.com
Mustang92
SN's #1 1%er
Rods and pistons as everyone else mentioned. Crank failures are mainly due to low oil or oil pump failures otherwise they can handle quite a bit. Far as I know all forged cranks are 8 bolt and the most common ones are the stock Cobra cranks.
Bill
Bill
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