question about forged motors
11-01-2006, 10:28 AM
#1
question about forged motors i have recently seen a bunch of people running forged stock displacement shortblocks. i can see the benefit of this if you are running boost, nitrous, or high compression race motors, but why on a street car running NA? is there any other added benefit? wouldnt the heavier forged rotating assembly and heavier weight only do harm? thanks
jacob
jacob
11-01-2006, 12:25 PM
#3
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Originally Posted by GuitsBoy
the forged internals will spin up much higher, plus the flat top pistons usually have valve reliefs already in them for running larger cams. Not to mention it allows them the choice of upgrading to FI of N2O at a later date.
11-01-2006, 02:19 PM
#5
one more question: from my understanding, would it make sense to boost up the compression with a forged motor. or would the fuel be the limiting factor? i bet you could make a crazy responsive motor with a forged shortblock and some AFRs
speaking from experience? 
Originally Posted by slow trap
+1 stock rodbolts don't like high rpms .
11-01-2006, 06:16 PM
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Originally Posted by qwikz28
one more question: from my understanding, would it make sense to boost up the compression with a forged motor. or would the fuel be the limiting factor? i bet you could make a crazy responsive motor with a forged shortblock and some AFRs
speaking from experience?
speaking from experience?
another problem that seems to be way too common.with a forged shortblock you will actually lose alittle cr if you go with a flat top because most of the pistons either has an -2 or -4 cc dish for the valve reliefs so you will need a smaller cc head to make up the difference.
11-01-2006, 06:29 PM
#7
Originally Posted by slow trap
no, i'm in the spun rod bearing club another problem that seems to be way too common.with a forged shortblock you will actually lose alittle cr if you go with a flat top because most of the pistons either has an -2 or -4 cc dish for the valve reliefs so you will need a smaller cc head to make up the difference.
another problem that seems to be way too common.with a forged shortblock you will actually lose alittle cr if you go with a flat top because most of the pistons either has an -2 or -4 cc dish for the valve reliefs so you will need a smaller cc head to make up the difference.Trending Topics
11-01-2006, 08:29 PM
#9
Originally Posted by slow trap
no, i'm in the spun rod bearing club another problem that seems to be way too common.with a forged shortblock you will actually lose alittle cr if you go with a flat top because most of the pistons either has an -2 or -4 cc dish for the valve reliefs so you will need a smaller cc head to make up the difference.
another problem that seems to be way too common.with a forged shortblock you will actually lose alittle cr if you go with a flat top because most of the pistons either has an -2 or -4 cc dish for the valve reliefs so you will need a smaller cc head to make up the difference.
11-01-2006, 08:37 PM
#10
you will never notice the drop in CR from the valve reliefs, and you will need them with that bigger cam (surely you're not going to build a motor and replace the cam with a stock grind are you?).
why forged? 'cuase peace of mind sure beats the hell out of peice if con rod through the oil pan.
why forged? 'cuase peace of mind sure beats the hell out of peice if con rod through the oil pan.
11-01-2006, 08:56 PM
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We built SBC a few years back , it has a little over 10,000 street miles currently , idles in traffic no problem
heres some specs
350 4bolt block
4.030'' Federal mogul forged 8.5:1 pistons
scat h beams 6.0
scat nodular iron crank 3.48
CompNitroushp Hyd flat tappet 224/234 .500''/ .530'' 113 Lsa
Crane gold 1.6 rocker arms
Dart Pro 1 2.05''/1.60''
Hooker 1 7/8 '' ceramic / 3.5'' torque tech exhuast kit , h pipe ,3.5'' flowmasters , 3.5'' mandrel bent over the axle
Weind 6-71 roots supercharger 12-14psi psi 93 octane
2 625 cfm carter afb carbs
3 speed th-350
3200 converter
2.73 stock 8.5 10 bolt
Engine was in a 3/4 ton lwb 79 chevy truck,has 10,000 + daily driven rain /shine miles , expect a lot more to come
currently in a 1970 1/2 Camaro build
heres some specs
350 4bolt block
4.030'' Federal mogul forged 8.5:1 pistons
scat h beams 6.0
scat nodular iron crank 3.48
CompNitroushp Hyd flat tappet 224/234 .500''/ .530'' 113 Lsa
Crane gold 1.6 rocker arms
Dart Pro 1 2.05''/1.60''
Hooker 1 7/8 '' ceramic / 3.5'' torque tech exhuast kit , h pipe ,3.5'' flowmasters , 3.5'' mandrel bent over the axle
Weind 6-71 roots supercharger 12-14psi psi 93 octane
2 625 cfm carter afb carbs
3 speed th-350
3200 converter
2.73 stock 8.5 10 bolt
Engine was in a 3/4 ton lwb 79 chevy truck,has 10,000 + daily driven rain /shine miles , expect a lot more to come
currently in a 1970 1/2 Camaro build
11-02-2006, 01:03 AM
#13
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Another reason is if you are building up a motor forged is the only choice for pistons as there are no Hyper oversized pisons made and if a hone won't get it done then you have to buy forged.
