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10-15-2018, 09:21 AM
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#1
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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To stroke or not to stroke
So I got completely screwed on the "machine shop fresh" motor that I purchased and have decided not to use it. I'll be using an ls6 that I was saving to swap my wife's 86 trans am. The motor I have needs the crank polished, new bearings and I'm going to have new rings and a fresh hone done too. Wonder if it's worth it to stroke to a 383 or just install forged rods and pistons and reuse the stock crank?
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01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
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10-15-2018, 09:45 AM
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#2
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Lord of the rings / 10 Second Club / Meet Coordinator
Join Date: Aug 2004
Location: Millstone Township, NJ
Posts: 6,359
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I think it just depends on your power goals. The stock cranks seem pretty strong so if the crank can be cleaned up and re-used, save the money and put it towards the machine work/new pistons/new rods. If you are going for big X,XXX rwhp, then a new crank probably isn't a bad idea.
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97 T/A Ram Air Convt
Forever dyno queen / 777rwhp 662 rwtq @ 17lbs / 10.2 @ 140
'24 Corvette Z06
17 Sierra 2500HD Dmax
81 Turbo TA
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10-15-2018, 10:08 AM
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#3
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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Would like to see upper 400, 500 would be nice. Since my stock ls6 short block needs work just wondering it's it's even worth replacing the rods or just installing arp rod bolts and doing pistons. Will be setting the car up to handle with a watts link and strano/afco coilovers. Have afr 205 heads, and ported fast 90 with the end opened up to 92mm. If I stay stock displacent I was planning on running this cam and 11.5:1 compression
https://www.corvetteforum.com/forums...-500-rwhp.html
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01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
Last edited by B4C; 10-15-2018 at 10:19 AM.
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10-15-2018, 10:44 AM
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#4
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Join Date: Nov 2007
Location: Jackson, NJ
Posts: 1,723
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I stayed stock stroke with my LS build for most durability on the street. The longer stroke will force the piston further out of the bottom of the cylinder than a lot of people like and could reduce longevity. The longer stroke also pushes the wrist pin into the oil ring land.
A happy medium is a 3.9" stroke crank. 4+" stroke cranks have the issues above. 3.9" is the biggest without the oil ring issue.
Stock LS6 will handle up to 700 hp without issue. If you're looking for over 600 that's when you should really invest in forged parts.
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1983 camaro- Scrap
1988 camaro- Also scrap
'05 Silverado- You guessed it, scrap
1988 TRX 250R- Ported w/ high compression on 110 octane- Out 60' your LT1
Jersey Shore Street Car Takeover (JSSCT) Founder
Quote:
Originally Posted by LS1ow
and once i get PHB, what do i ajust it too?
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Quote:
Originally Posted by Jersey Mike
Seven.
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10-15-2018, 10:55 AM
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#5
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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Quote:
Originally Posted by wretched73
I stayed stock stroke with my LS build for most durability on the street. The longer stroke will force the piston further out of the bottom of the cylinder than a lot of people like and could reduce longevity. The longer stroke also pushes the wrist pin into the oil ring land.
A happy medium is a 3.9" stroke crank. 4+" stroke cranks have the issues above. 3.9" is the biggest without the oil ring issue.
Stock LS6 will handle up to 700 hp without issue. If you're looking for over 600 that's when you should really invest in forged parts.
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Well if they hone it to .005 won't I need new pistons anyway? Guess if that's the case then I'll just reuse the stock stuff unless I need to replace the pistons then ill go forged. The car will never see nitrous or forced induction, staying n/a.
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01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
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10-15-2018, 11:10 AM
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#6
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Join Date: May 2009
Location: Highland Mills, NY
Posts: 1,915
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What wretched said is the reason I ended up resleeving my LS2, then I ended up big bore with a 4" stroke. 440ci.
I can't remember if you need over sized pistons for .005" I think you would just need to install new rings. But if there is damage .005 might not be enough to fix the damage. May want to take it out more buy new pistons and rods, just remember they will need to be balanced
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2000 Camaro SS 610rwhp/570rwtq LS2 440, 12 bolt 3.73, tranzilla t56
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10-15-2018, 11:27 AM
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#7
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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Quote:
Originally Posted by MyFirstZ
What wretched said is the reason I ended up resleeving my LS2, then I ended up big bore with a 4" stroke. 440ci.
I can't remember if you need over sized pistons for .005" I think you would just need to install new rings. But if there is damage .005 might not be enough to fix the damage. May want to take it out more buy new pistons and rods, just remember they will need to be balanced
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It's a fairly low mileage short block and I didn't see any damage to the cylinders. I'll let the machine shop decide what's up with it and the determine what I'm going to do. Looks like I'll just be reusing all the stock parts in it and adding arp rod bolts at this point.
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01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
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10-15-2018, 11:58 AM
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#8
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Join Date: Nov 2007
Location: Jackson, NJ
Posts: 1,723
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Quote:
Originally Posted by B4C
Well if they hone it to .005 won't I need new pistons anyway? Guess if that's the case then I'll just reuse the stock stuff unless I need to replace the pistons then ill go forged. The car will never see nitrous or forced induction, staying n/a.
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Quote:
Originally Posted by MyFirstZ
What wretched said is the reason I ended up resleeving my LS2, then I ended up big bore with a 4" stroke. 440ci.
I can't remember if you need over sized pistons for .005" I think you would just need to install new rings. But if there is damage .005 might not be enough to fix the damage. May want to take it out more buy new pistons and rods, just remember they will need to be balanced
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WS6 store on LS1tech sells .005" overbore pistons, they're hypereutectic like stock but "better". Not sure how they are better but that's what the vendor claims. They'd still be plenty good for NA
__________________
1983 camaro- Scrap
1988 camaro- Also scrap
'05 Silverado- You guessed it, scrap
1988 TRX 250R- Ported w/ high compression on 110 octane- Out 60' your LT1
Jersey Shore Street Car Takeover (JSSCT) Founder
Quote:
Originally Posted by LS1ow
and once i get PHB, what do i ajust it too?
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Quote:
Originally Posted by Jersey Mike
Seven.
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10-15-2018, 01:19 PM
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#9
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Join Date: May 2009
Location: Highland Mills, NY
Posts: 1,915
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If you had to get new ones I wouldn't stay with hypereutectic.
Only way i can see them being labeled as better is if they have a valve relief
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2000 Camaro SS 610rwhp/570rwtq LS2 440, 12 bolt 3.73, tranzilla t56
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10-15-2018, 01:35 PM
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#10
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American Road Warrior
Join Date: Jul 2005
Location: Wastelands of NJ
Posts: 6,116
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If you have the time and the coin, there is no replacement for displacement.
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unstable bob gable: LEGENDARY LEGEND,
ICONIC ICON, AND AMERICAN BAD AZZ!!!
1991 Dodge Spirit R/T: Gran'pa lookin' 150+ mph turbo rocket.
2013 Dodge Avenger RT: Wastelands cruiser.
2008 Crown Vic Police Interceptor: 'Nuff said!
THE ONLY THING THAT SUCKS WORSE THEN IMPORTS ARE RICED OUT IMPORTS!!!
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10-15-2018, 03:12 PM
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#11
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Join Date: Nov 2007
Location: Jackson, NJ
Posts: 1,723
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Quote:
Originally Posted by MyFirstZ
If you had to get new ones I wouldn't stay with hypereutectic.
Only way i can see them being labeled as better is if they have a valve relief
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Why not stay hypereutectic? He has no plans on boost or spray or monster HP. They're ~1/2 - 1/3 the cost of forged pistons.
__________________
1983 camaro- Scrap
1988 camaro- Also scrap
'05 Silverado- You guessed it, scrap
1988 TRX 250R- Ported w/ high compression on 110 octane- Out 60' your LT1
Jersey Shore Street Car Takeover (JSSCT) Founder
Quote:
Originally Posted by LS1ow
and once i get PHB, what do i ajust it too?
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Quote:
Originally Posted by Jersey Mike
Seven.
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10-15-2018, 03:30 PM
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#12
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Join Date: May 2009
Location: Highland Mills, NY
Posts: 1,915
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seen plenty of stock pistons blow ringlands
__________________
2000 Camaro SS 610rwhp/570rwtq LS2 440, 12 bolt 3.73, tranzilla t56
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10-15-2018, 04:32 PM
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#13
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Stalker
Join Date: Aug 2004
Posts: 12,077
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For comparison, my stock heads ls6 made 425rwhp with cam and bolt-ons. So it was like 500 at flywheel. Only upgrade to bottom end was arp rod bolts.
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10-15-2018, 06:42 PM
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#14
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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Quote:
Originally Posted by V
For comparison, my stock heads ls6 made 425rwhp with cam and bolt-ons. So it was like 500 at flywheel. Only upgrade to bottom end was arp rod bolts.
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I'm hoping for around 500 wheel
__________________
01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
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10-15-2018, 06:55 PM
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#15
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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For whatever reason, 370s do better than 383s in ls land.....
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10-16-2018, 04:20 AM
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#16
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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Is it worth getting the stock pistons fly cut? Or to just go aftermarket?
__________________
01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
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10-16-2018, 06:44 AM
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#17
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Join Date: Nov 2007
Location: Jackson, NJ
Posts: 1,723
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Quote:
Originally Posted by sweetbmxrider
For whatever reason, 370s do better than 383s in ls land.....
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What do you mean? 383 certainly isn't popular, it doesn't cost any more to go 400ci. Cranks cost the same and no additional machining is required.
Quote:
Originally Posted by B4C
Is it worth getting the stock pistons fly cut? Or to just go aftermarket?
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I'd assemble and check PTV first, then decide if you even need them fly cut.
__________________
1983 camaro- Scrap
1988 camaro- Also scrap
'05 Silverado- You guessed it, scrap
1988 TRX 250R- Ported w/ high compression on 110 octane- Out 60' your LT1
Jersey Shore Street Car Takeover (JSSCT) Founder
Quote:
Originally Posted by LS1ow
and once i get PHB, what do i ajust it too?
|
Quote:
Originally Posted by Jersey Mike
Seven.
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10-16-2018, 07:35 AM
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#18
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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Based on my research on the heads I have and cam I want to run it's going to be close. Plus I'll be milling the heads to have about 60cc Chambers.
__________________
01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
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10-16-2018, 11:04 AM
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#19
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Join Date: May 2009
Location: Highland Mills, NY
Posts: 1,915
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While its apart better safe than sorry, or at least check it. Super easy process.
__________________
2000 Camaro SS 610rwhp/570rwtq LS2 440, 12 bolt 3.73, tranzilla t56
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10-16-2018, 07:59 PM
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#20
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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Quote:
Originally Posted by wretched73
What do you mean? 383 certainly isn't popular, it doesn't cost any more to go 400ci. Cranks cost the same and no additional machining is required.
I'd assemble and check PTV first, then decide if you even need them fly cut.
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Sell ls6, buy lq9, same boat as before but with moar fubared cubes!
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10-17-2018, 04:12 AM
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#21
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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Quote:
Originally Posted by sweetbmxrider
Sell ls6, buy lq9, same boat as before but with moar fubared cubes!
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Would like to keep the weight of the iron block off the front end since the cars going to be setup for handling. Will save roughly 100 lbs off the front end. And no I don't want to go ls2, weary of buying anything used anymore and don't have the coin to buy a new ls2 block and rotating assembly. I'll stick with the ls6 that I have.
__________________
01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
Last edited by B4C; 10-17-2018 at 04:29 AM.
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10-17-2018, 02:29 PM
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#22
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American Road Warrior
Join Date: Jul 2005
Location: Wastelands of NJ
Posts: 6,116
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If ya gots 'em smoke 'em and build 'em.
__________________
unstable bob gable: LEGENDARY LEGEND,
ICONIC ICON, AND AMERICAN BAD AZZ!!!
1991 Dodge Spirit R/T: Gran'pa lookin' 150+ mph turbo rocket.
2013 Dodge Avenger RT: Wastelands cruiser.
2008 Crown Vic Police Interceptor: 'Nuff said!
THE ONLY THING THAT SUCKS WORSE THEN IMPORTS ARE RICED OUT IMPORTS!!!
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