Help! Hole in Piston

texasmustang12 · May 27th, 2010, 12:20 PM

Ok guys, tore down motor thinking it needed head gasket and boy did i get a surprise. Valve broke bounced around on piston and made a hole. It was nasty looking. Motor is a 302 in my 94 Gt. Gonna need new heads and pistons for sure and most likely a bore job done. I was thinking bout the 331 stroker but let me hear some tips from the experts. Thanks for all the help. May do the 351 swap if someone is interested in the parts i have on this built 302

93hatch · May 27th, 2010, 03:40 PM

347>331 or 351

CAMN89GT · May 28th, 2010, 01:10 AM

408 sounds nice

mustanginky · May 28th, 2010, 01:34 AM

a nicely built 347 and some supporting mods like HCI can do you wonders!

91sleeper · May 28th, 2010, 01:37 AM

im a 331 fan.

jessemachone · May 28th, 2010, 01:39 AM

Originally Posted by 91sleeper

im a 331 fan.

y?

91sleeper · May 28th, 2010, 01:53 AM

Well thats what my car is and being brought up with a old school father the has always been that the 347 smokes more and blah blah and that bore is to big and its harder to cool. The main reason is that since I have had mustangs I have always had a 331 street car and the last two have been blower cars. Never any problems with them and I dont think theres enough difference in ci to worry one way or the other. Plus my car is really really strong for a street car.

Goblin · May 28th, 2010, 03:11 AM

JB Weld the piston and sand blast the head. Slap it back together.. head to the track and spray the shit out of it.

pitbull4.6 · May 28th, 2010, 03:18 AM

buy a block if you want to go 331/347. Thats why they are known as 331/347 smoker kits.

e3sean · May 28th, 2010, 05:17 AM

ya you should just stay with a 302 i herd 347's burn oil.

e3sean · May 28th, 2010, 05:20 AM

Originally Posted by Goblin

JB Weld the piston and sand blast the head. Slap it back together.. head to the track and spray the shit out of it.

hey where the hell have you been?

Mustang Boy · May 28th, 2010, 10:21 AM

Originally Posted by CAMN89GT

408 sounds nice

+1

or maybe a 427w would be nice too

texasmustang12 · May 29th, 2010, 03:10 PM

picked up a 351 yesterday. got another started for the build on it. wanting 450 to 500 horses from it without a bore. Thanks for the input

Goblin · May 30th, 2010, 12:35 AM

Originally Posted by e3sean

hey where the hell have you been?

Working WAY to much. Dont have enough time to get on here....

65eatsrice · May 30th, 2010, 12:48 AM

Originally Posted by e3sean

ya you should just stay with a 302 i herd 347's burn oil.

302Army187 · May 30th, 2010, 06:37 AM

pictures or it didn't happen.

texasmustang12 · May 30th, 2010, 04:44 PM

have no clue how to post pics but i will figure it out when i get back from this damn wedding

93mustank · May 31st, 2010, 01:24 AM

Originally Posted by 91sleeper

Well thats what my car is and being brought up with a old school father the has always been that the 347 smokes more and blah blah and that bore is to big and its harder to cool. The main reason is that since I have had mustangs I have always had a 331 street car and the last two have been blower cars. Never any problems with them and I dont think theres enough difference in ci to worry one way or the other. Plus my car is really really strong for a street car.

Ya... you know those bigger bore 347's...a lot bigger than those 331 bores.....

Any body that builds a 331 over a 347 from scratch should be kicked in the face....

91sleeper · May 31st, 2010, 01:47 PM

well I reckon i should be kicked in the face then hell might as well kick me twice for putting a e cam in it while you are at it. I like my 331 you like your 347. When you pay for my build I will run a 347 till then i am going to build what i like.

cyberdude47 · May 31st, 2010, 06:40 PM

I had a 331 when I had a fox and loved it. best motor that was in that car out of 6 different combinations over 11 yrs, ran way better than my buddies 347 with similar mods. Mine was strong and never gave me any real grief. My buddies 347 always seemed to have probs. Another guy I know just dropped a 331 into his '68 and its running high 11's w/o any artificial aspiration.

May 27th, 2010, 12:20 PM	#1
texasmustang12 Newbie 1994 Mustang GT Join Date: May 2010 Posts: 36 iTrader: 0 reviews	Help! Hole in Piston Ok guys, tore down motor thinking it needed head gasket and boy did i get a surprise. Valve broke bounced around on piston and made a hole. It was nasty looking. Motor is a 302 in my 94 Gt. Gonna need new heads and pistons for sure and most likely a bore job done. I was thinking bout the 331 stroker but let me hear some tips from the experts. Thanks for all the help. May do the 351 swap if someone is interested in the parts i have on this built 302

May 27th, 2010, 03:40 PM	#2
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	347>331 or 351 __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 28th, 2010, 01:10 AM	#3
CAMN89GT Banned 1988 Mustang Notch it's a bad bitch..i promise Join Date: Dec 2006 Location: Chicago Posts: 980 iTrader: 0 reviews	408 sounds nice __________________ '88 Notch ~ T-70 & Faceplated GForce! Tuned by [B][I][U]Kurgan Motorsports[/U][/I][/B]

May 28th, 2010, 01:34 AM	#4
mustanginky MM Fanatic 2000 gt Join Date: Feb 2009 Location: La grange, KY Posts: 4,256 iTrader: 2 reviews	a nicely built 347 and some supporting mods like HCI can do you wonders! __________________ Procharged 2000 5 Speed BAB GT, built motor, blower cams, speedy dyno tune 412 hp, 450 rw tq HARDCORE CREW BRIGHT ATLANTIC BLUE CREW #1 MEMBER

May 28th, 2010, 03:18 AM	#9
pitbull4.6 Enthusiast 06 mustang gt Join Date: Dec 2009 Location: edmonton Posts: 864 iTrader: 0 reviews	buy a block if you want to go 331/347. Thats why they are known as 331/347 smoker kits. __________________ Bottle Fed

May 28th, 2010, 03:11 AM	#8
Goblin Hardcore Enthusiast 88mm Join Date: Apr 2007 Location: Tucson, AZ Posts: 2,111 iTrader: 0 reviews	JB Weld the piston and sand blast the head. Slap it back together.. head to the track and spray the shit out of it.

May 28th, 2010, 05:17 AM	#10
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,609 iTrader: 0 reviews	ya you should just stay with a 302 i herd 347's burn oil. __________________ Last edited by e3sean; May 28th, 2010 at 05:19 AM.

May 29th, 2010, 03:10 PM	#13
texasmustang12 Newbie 1994 Mustang GT Join Date: May 2010 Posts: 36 iTrader: 0 reviews	picked up a 351 yesterday. got another started for the build on it. wanting 450 to 500 horses from it without a bore. Thanks for the input

May 30th, 2010, 06:37 AM	#16
302Army187 Hardcore Enthusiast '89 LX 'Vert 10's or bust... Literally. Join Date: May 2009 Location: Denver, Co Posts: 2,915 iTrader: 0 reviews	pictures or it didn't happen. __________________ H/C/I 302 + nitrous for now... supercharger/turbo soon? www.youtube.com/Xarmy187 Please support my YouTube channel! My videos don't disappoint!

May 30th, 2010, 04:44 PM	#17
texasmustang12 Newbie 1994 Mustang GT Join Date: May 2010 Posts: 36 iTrader: 0 reviews	have no clue how to post pics but i will figure it out when i get back from this damn wedding

May 31st, 2010, 06:40 PM	#20
cyberdude47 Regular Join Date: Mar 2008 Posts: 178 iTrader: 2 reviews	I had a 331 when I had a fox and loved it. best motor that was in that car out of 6 different combinations over 11 yrs, ran way better than my buddies 347 with similar mods. Mine was strong and never gave me any real grief. My buddies 347 always seemed to have probs. Another guy I know just dropped a 331 into his '68 and its running high 11's w/o any artificial aspiration. __________________ Cervini Stalker kit, Foose 18" Nitrous 265/295 Manley rods & pistons, Kellogg crank, ATI 10%OD, Fidenza flywheel, Spec3 clutch. Kenne Bell 2.2L,8rib conversion. Headers, Xpipe, Magnaflows JLT, SCT Eibach, H&R, Tokico, Maximum motorsports

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