Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: vinnyd76]
#2471698
03/25/18 10:48 AM
03/25/18 10:48 AM
|
Joined: Aug 2007
Posts: 6,095 Valencia, España
NachoRT74
master
|
master
Joined: Aug 2007
Posts: 6,095
Valencia, España
|
I'm not an expert... but if you are NOT REALLY race with it but just an occasional visit to the track I think Hypers are quite enough, 30-40% cheaper than forged
just my 2 cents
Last edited by NachoRT74; 03/25/18 10:54 AM.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: vinnyd76]
#2471723
03/25/18 11:52 AM
03/25/18 11:52 AM
|
Joined: Jan 2003
Posts: 6,404 Abilene, Texas
fastmark
master
|
master
Joined: Jan 2003
Posts: 6,404
Abilene, Texas
|
This is can of worms on this site. Some here love them and others hate them. When considering the overall cost of a motor, why cut corners just because something is cheap? I’ve known two people who have had problems with them coming apart. My engine shop does not use them. My two cents.
Last edited by fastmark; 03/25/18 11:53 AM.
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: Rob C]
#2471904
03/25/18 05:32 PM
03/25/18 05:32 PM
|
Joined: Aug 2003
Posts: 43,190 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,190
Bend,OR USA
|
I've seen more than one failed cast piston in the oil pan in more than 100 pieces from detonation Those cylinders where ruined from the steel writs pin gouging deep grooves into the cylinder walls before the motor stops rotating Same thing on any hard steel part, like a air cleaner nut, dropped into the combustion chambers intentionally(haters at the races) or accidently, instant destruction The OEM car makers use cast pistons due to cost, almost the Hi Po motors from the factory,GM, Ford, Mopar, have forged pistons My choices on piston type used in all the motors I build are meant to be driven like hot rodders drive, forged for high abuse If your not going to abuse, hot rod, the motor use Hypers, if not, don't use them
Last edited by Cab_Burge; 03/25/18 05:33 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: vinnyd76]
#2472055
03/25/18 11:32 PM
03/25/18 11:32 PM
|
Joined: Jul 2011
Posts: 957 Chicago
PurpleBeeper
super stock
|
super stock
Joined: Jul 2011
Posts: 957
Chicago
|
I have to go with EV2bird on this one. I run two cars, both with nitrous. One is a (cough, Mustang) with hypereutectic pistons and I've run as high as a 150 nitrous shot on them.... but I DO NOT recommend it.....forged pistons for nitrous, blowers or turbos. However, if you're running naturally aspirated, then hypereutectic all day long...or just cast pistons. I believe you can run a tighter piston/wall clearance (less damage during engine warm up, less piston blow by, etc) with hypereutectic pistons vs. forged, though I think it's mainly the old 2618 (?) forged pistons that have "piston slap" when the engine is cold. I do plan to run 2618 forged pistons in my new "mellow highway-cruiser" 440 I'm building ONLY because I plan to leave the nitrous on the car.
Last edited by PurpleBeeper; 03/25/18 11:32 PM.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: Cab_Burge]
#2472319
03/26/18 03:05 PM
03/26/18 03:05 PM
|
Joined: Mar 2005
Posts: 792 Earth
Rob C
super stock
|
super stock
Joined: Mar 2005
Posts: 792
Earth
|
Those The OEM car makers use cast pistons due to cost, almost the Hi Po motors from the factory,GM, Ford, Mopar, have forged pistons My choices on piston type used in all the motors I build are meant to be driven like hot rodders drive, forged for high abuse If your not going to abuse, hot rod, the motor use Hypers, if not, don't use them Are today’s engines equipped with forged or hypers? “Race” engines should be equipped with forged slugs. Forged slugs take the abuse of racing easy. Street and street strip cars can use Hypers. Hypers can survive a lot of power. I wouldn’t go into competition and travel the nation chasing the money with them. Build for intent. Over build no matter what your doing.
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: DusterKid]
#2472367
03/26/18 04:30 PM
03/26/18 04:30 PM
|
Joined: Jan 2003
Posts: 10,720 North Dakota
6PakBee
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 10,720
North Dakota
|
I just did a cursory look at Summit for a 440 and the Speed Pro forged are around $450 and the KB hypereutectic are around $450. So what would be the advantage of the KB's other than a tighter skirt clearance? But I would be the first to admit this is like the color green, you either love it or hate it.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: Cab_Burge]
#2472376
03/26/18 04:44 PM
03/26/18 04:44 PM
|
Joined: Apr 2012
Posts: 18,880 -
RSNOMO
Moparts Torchbearer
|
Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
-
|
I've seen more than one failed cast piston in the oil pan in more than 100 pieces from detonation
The OEM car makers use cast pistons due to cost, almost all the Hi Po motors from the factory,GM, Ford, Mopar, have forged pistons Bullseye...
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: 6PakBee]
#2472435
03/26/18 06:47 PM
03/26/18 06:47 PM
|
Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
|
Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
|
I just did a cursory look at Summit for a 440 and the Speed Pro forged are around $450 and the KB hypereutectic are around $450. So what would be the advantage of the KB's other than a tighter skirt clearance? I believe the KB hypers are considerably lighter than the speed pro forged. For a street/strip 340 that's more street than strip I would use the hypers and not sweat it.
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: vinnyd76]
#2474854
03/31/18 01:02 PM
03/31/18 01:02 PM
|
Joined: Mar 2007
Posts: 3,278 West Coast, USA
jbc426
master
|
master
Joined: Mar 2007
Posts: 3,278
West Coast, USA
|
For a long life street motor with no power added or spray, I was told the Hypers will hold the ring seal and control oil longer than the forged due to having a tighter fit than the forged pistons require.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: 6PakBee]
#2474883
03/31/18 02:10 PM
03/31/18 02:10 PM
|
Joined: Jul 2011
Posts: 957 Chicago
PurpleBeeper
super stock
|
super stock
Joined: Jul 2011
Posts: 957
Chicago
|
There's nothing wrong with Speed Pro pistons, but I "think" the KB's are lighter too....engine revs up faster, less bearing wear, higher rpm potential.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
|
|
|
Re: Piston Advice: Forged or Hypereutectic for street/strip use
[Re: vinnyd76]
#2474888
03/31/18 02:23 PM
03/31/18 02:23 PM
|
Joined: Jan 2006
Posts: 587 IL . usa
cjs69mope
mopar
|
mopar
Joined: Jan 2006
Posts: 587
IL . usa
|
I can tell you this i ordered a set of kb400 pistons for my dads 383 rebuild and it has been the best decision i ever made in my 30 plus hot rodding years! Why? Well 383 has very little choice for a good compression piston , I wanted same as you 10.1 we got 10.2 with .046 in quench with 1009 felpro gasket. Edelbrock heads,rpm intake and comp 275 hl cam , with cat roller rockers and a hp 750 holley and you have pretty much a solid 13 sec car! that burns no oil and the oil stays way cleaner than my 493 with forged ross pistons.
what i am saying for a tough sounding cruise night car no one knows what the pistons are LOL !
1969 Dodge Charger
1969 Dodge Superbee
|
|
|
|
|