331 stroker balancing question

jonzer13 · December 5th, 2011, 06:31 PM

im building a dss 331 stroker motor i bought this kit from a guy that i know he bought the kit with low comp pistons this is what the kit was balanced for buy dss i sent the pistons back and bought there flat top pistons every thing else with the kit stayed the same it was balcanced using a 28oz harmonic balcancer and a 28oz flywheel the guy thats building my motor said he dosent think it needs to be rebalanced he has built alot of 9s mustang motors he said he has changed alot of pistons in stock motors to low comp pistons for blowers and nos with out having them rebalanced and never had any problems do you think this needs rebalanced any info helps

69fastback · December 5th, 2011, 06:45 PM

If it was balanced with one set of pistons, and you bought another set of pistons, it needs rebalanced. The cost should be minimal, so just get it done. If you're spinning it up high, it needs to be right.

thisguysride · December 5th, 2011, 07:03 PM

You already got it apart. Do it right will save you stress later on. Technically you dont have to rebalance but at high rpm your engine will run smoother.

johnr2001 · December 5th, 2011, 07:06 PM

there is no need to have it balanced again... your running the same crank correct ? if so dont worry with it. any good machine shop would tell you the same.

I would be more concerned with how the new pistons fit the existing block.

69fastback · December 5th, 2011, 08:28 PM

Originally Posted by johnr2001

there is no need to have it balanced again... your running the same crank correct ? if so dont worry with it. any good machine shop would tell you the same.

I would be more concerned with how the new pistons fit the existing block.

I do not agree. The rods and piston have more to do with balancing the rotating asemblely than the crank does, because they're the farthest away from the center. A few grams off in the pistons will make a lot more difference than anywhere else. It can't cost $50 because they're just going to match all the pistons. Any GOOD machine shop will tell you that. You're soending this much money. Don't half ass it.

johnr2001 · December 6th, 2011, 04:39 AM

Originally Posted by 69fastback

I do not agree. The rods and piston have more to do with balancing the rotating asemblely than the crank does, because they're the farthest away from the center. A few grams off in the pistons will make a lot more difference than anywhere else. It can't cost $50 because they're just going to match all the pistons. Any GOOD machine shop will tell you that. You're soending this much money. Don't half ass it.

no one said you had to agree everyone has there own opinion, I am speaking from personal experience in the 20 plus years I have been building motors.

will having it rebalanced hurt no is it a must no.. he is not building a top fuel dragster......

jonzer13 · December 6th, 2011, 06:45 AM

Yeah the crank is the same every thing is the same except for the pistons the best price I have got to have it rebalanced was 225 and if it needs heavy metal it will be more

69fastback · December 6th, 2011, 07:59 AM

Originally Posted by johnr2001

no one said you had to agree everyone has there own opinion, I am speaking from personal experience in the 20 plus years I have been building motors.

will having it rebalanced hurt no is it a must no.. he is not building a top fuel dragster......

Awwwww. Someone doesn't like to be told they're not agreed with. Is it a must to balance one in the first place? No. Is it the best thing to do? Yes. Sorry. The machinists that I know don't cut corners.

Originally Posted by jonzer13

Yeah the crank is the same every thing is the same except for the pistons the best price I have got to have it rebalanced was 225 and if it needs heavy metal it will be more

That's retarded. The best machine shop in our area charges $125 to balance a rotating assembly.

jonzer13 · December 6th, 2011, 08:44 AM

Yeah where im at there's 2 shops in the area that do balancing and I told both what was going on and the best price was 225 plus I thought this was high price

fogged306 · December 6th, 2011, 10:31 AM

I guess it depends on the area you're in, it's $175 for a balance around here. If there's only 2 shops in your area, that would explain the high price, no competition to drive the price down.

jonzer13 · December 6th, 2011, 12:21 PM

Yeah that my thoughts on it and when you talk to them there's very little conference in them doing the balancing

Stdyhand · December 6th, 2011, 04:52 PM

We only have one real machine shop around here that does this type of work also. So when I get my 347 stroker I will either get a rotating assembly balanced from the company I get the assembly from such as scat or eagle, or I may just get a complete kit from FordStrokers to simply the whole thing. I am leaning more towards the latter choice.

Either way I would look into getting it balanced. Not for sure but maybe you could check the weight of each piston just to see how far off they are from each other. You would need a scale that can measure in grams though. I have one I use for reloading ammunition but it would work for weighing pistons.

If you found they were all even you might get away without balancing but if they are different, and they probably will be, I would look further away for a real machine shop. Your bound to find one at least within a 3 hour drive. I wouldn't hesitate to drive that far for such a crucial job.

ryanw · December 6th, 2011, 05:08 PM

Originally Posted by Stdyhand

You would need a scale that can measure in grams though. I have one I use for reloading ammunition .

I'm sure your checking more then ammunition with that scale. Lmao

Stdyhand · December 6th, 2011, 05:38 PM

Originally Posted by ryanw

I'm sure your checking more then ammunition with that scale. Lmao

December 5th, 2011, 06:31 PM	#1
jonzer13 Regular Join Date: Sep 2011 Posts: 60 iTrader: 1 reviews	331 stroker balancing question im building a dss 331 stroker motor i bought this kit from a guy that i know he bought the kit with low comp pistons this is what the kit was balanced for buy dss i sent the pistons back and bought there flat top pistons every thing else with the kit stayed the same it was balcanced using a 28oz harmonic balcancer and a 28oz flywheel the guy thats building my motor said he dosent think it needs to be rebalanced he has built alot of 9s mustang motors he said he has changed alot of pistons in stock motors to low comp pistons for blowers and nos with out having them rebalanced and never had any problems do you think this needs rebalanced any info helps

December 5th, 2011, 06:45 PM	#2
69fastback Premium Member 1969 Mustang Mach 1 6.824@101.61 Join Date: Aug 2006 Location: Oklahoma jackass, get to driving Posts: 5,565 iTrader: 0 reviews	If it was balanced with one set of pistons, and you bought another set of pistons, it needs rebalanced. The cost should be minimal, so just get it done. If you're spinning it up high, it needs to be right. __________________ ./___ _ ____ ___ \. ( ]]] _ _ O _ _ [[[ ) \_ o _ _____ _ o _/ \|___\| ......... \|___\| http://www.youtube.com/watch?v=HyYU3...e_gdata_player

December 5th, 2011, 07:06 PM	#4
johnr2001 Enthusiast 2001 GT Join Date: Dec 2007 Location: Bivalve MD Posts: 575 iTrader: 1 reviews	there is no need to have it balanced again... your running the same crank correct ? if so dont worry with it. any good machine shop would tell you the same. I would be more concerned with how the new pistons fit the existing block. __________________ 03 Mach 1 full eaton swap, 18" chrome bullitts, H&R springs, 5.0 shifter, slp2, mac catted H, FRP 4.10's, 443 RWHP/ 386 TQ

LinkBacks (?) LinkBack to this Thread: http://www.moddedmustangs.com/forums/5-0-mustangs/241571-331-stroker-balancing-question.html
Posted By	For	Type	Date
Thread Engine Help 331 Stroker Build \| Forums at Modded Mustangs \| BoardReader	This thread	Refback	January 21st, 2012 11:45 PM

Threads Similar to: 331 stroker balancing question
Thread	Thread Starter	Forum	Replies	Last Post
5.0 Stroker Question	BigEag205	4V / SVT	6	January 13th, 2011 11:04 PM
347 stroker question	95Pony	5.0 Mustangs	18	November 7th, 2010 06:51 PM
stroker kit balancing	DigitalDC89	5.0 Mustangs	7	October 28th, 2010 11:26 AM
Stroker Kit Question...	Traidmarx	5.0 Mustangs	12	January 25th, 2009 09:20 AM
To Stroker or Not to Stroker? That is the Question!	87StangLX	General Tech	13	October 20th, 2007 10:46 AM

December 5th, 2011, 07:03 PM	#3
thisguysride Regular 1991 gt convertible Join Date: Dec 2011 Location: Colorado springs Posts: 60 iTrader: 0 reviews	You already got it apart. Do it right will save you stress later on. Technically you dont have to rebalance but at high rpm your engine will run smoother.

December 6th, 2011, 06:45 AM	#7
jonzer13 Regular Join Date: Sep 2011 Posts: 60 iTrader: 1 reviews	Yeah the crank is the same every thing is the same except for the pistons the best price I have got to have it rebalanced was 225 and if it needs heavy metal it will be more

December 6th, 2011, 08:44 AM	#9
jonzer13 Regular Join Date: Sep 2011 Posts: 60 iTrader: 1 reviews	Yeah where im at there's 2 shops in the area that do balancing and I told both what was going on and the best price was 225 plus I thought this was high price

December 6th, 2011, 10:31 AM	#10
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	I guess it depends on the area you're in, it's $175 for a balance around here. If there's only 2 shops in your area, that would explain the high price, no competition to drive the price down.

December 6th, 2011, 12:21 PM	#11
jonzer13 Regular Join Date: Sep 2011 Posts: 60 iTrader: 1 reviews	Yeah that my thoughts on it and when you talk to them there's very little conference in them doing the balancing

December 6th, 2011, 04:52 PM	#12
Stdyhand Regular 1991 Ford Mustang GT Join Date: Apr 2011 Location: Missouri Posts: 213 iTrader: 0 reviews	We only have one real machine shop around here that does this type of work also. So when I get my 347 stroker I will either get a rotating assembly balanced from the company I get the assembly from such as scat or eagle, or I may just get a complete kit from FordStrokers to simply the whole thing. I am leaning more towards the latter choice. Either way I would look into getting it balanced. Not for sure but maybe you could check the weight of each piston just to see how far off they are from each other. You would need a scale that can measure in grams though. I have one I use for reloading ammunition but it would work for weighing pistons. If you found they were all even you might get away without balancing but if they are different, and they probably will be, I would look further away for a real machine shop. Your bound to find one at least within a 3 hour drive. I wouldn't hesitate to drive that far for such a crucial job.

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

All times are GMT -4. The time now is 01:56 AM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.