forged pistons?

dkbanjo · February 10th, 2010, 09:15 PM

I am going to be doing a longblock motor exchange on my 91 5.0 for $1,200, and I was wondering if it is worth throwing in some forged pistons and moly rings for $400 more. I don't have a lot money to spend and Don't plan on going over 450hp. I do have a 10 psi supercharger, holly intake, 30lb injectors, and a full exaust. I will be installing a 3200-3400 stall lock-up converter at the same time. I was also wondering if that 400 would be better spent on something else. " less debt or paint" LOL Thank you for you input

FastStang91Lx · February 10th, 2010, 09:20 PM

If your tune is spot on, save the 400 for the guy that tunes it. If you plan on not getting a proper tune...... then 400 is cheap insurance, lol

dkbanjo · February 10th, 2010, 09:26 PM

Are the pistons usually the first to go? also, the pistons I was looking at are a 8.5:1 ratio(dish) will I have a noticeable change in power( more or less) . Will I be able to run more boost? Thanks

FastStang91Lx · February 10th, 2010, 10:02 PM

Perfect pistons for boost. Keep in mind that your head's combustion chamber affects your ratio. So when choosing pistons, they usually llist an example head chamber. Maybe you already saw that/know that, but thought I would add that. Detonation is a bitch on pistons. I think you will be fine with them though. Just get a good tune. Depending on what you have for compression now (assuming stock 9:1) then yes, you can run more boost.

RDY4WAR · February 10th, 2010, 10:46 PM

With 10psi you should be safe, just keep the timing down. I agree with the second post.

Proper tune or pistons. You'll make more consistent power with the tune.

uedlose · February 11th, 2010, 09:07 AM

it is cheaper and much easier to go ahead and put the forged pistons in now. gives room to move up the boost and they are just more forgiving,they can take more abuse. Rattle the engine and you could be buying them later anyway even if you have a good tune. get some bad gas and not know it, some bone head puts the wrong gas in the wrong hole at the pumps when filling the tanks. just do it and be happy you did. it is also a better selling point if you want to sell it. even with a good tune it always seems mustangers can tear up a iron piss pot and with boost it only happens faster. LOL ask me how I know.

dkbanjo · February 11th, 2010, 12:43 PM

Thanks for the replies, I think I'll get them just to be safe.

FastStang91Lx · February 11th, 2010, 12:50 PM

Just don't skimp on the tune, and you'll be really happy

408w Fox · February 11th, 2010, 04:17 PM

dudes right

dkbanjo · February 14th, 2010, 08:48 PM

I purchased them, Thanks

February 10th, 2010, 09:15 PM	#1
dkbanjo Newbie Join Date: Feb 2010 Posts: 8 iTrader: 0 reviews	forged pistons? I am going to be doing a longblock motor exchange on my 91 5.0 for $1,200, and I was wondering if it is worth throwing in some forged pistons and moly rings for $400 more. I don't have a lot money to spend and Don't plan on going over 450hp. I do have a 10 psi supercharger, holly intake, 30lb injectors, and a full exaust. I will be installing a 3200-3400 stall lock-up converter at the same time. I was also wondering if that 400 would be better spent on something else. " less debt or paint" LOL Thank you for you input

February 10th, 2010, 09:20 PM	#2
FastStang91Lx MM Fanatic 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 4,802 iTrader: 2 reviews	If your tune is spot on, save the 400 for the guy that tunes it. If you plan on not getting a proper tune...... then 400 is cheap insurance, lol __________________ A whole bunch of crap that makes the car go fast

February 10th, 2010, 10:02 PM	#4
FastStang91Lx MM Fanatic 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 4,802 iTrader: 2 reviews	Perfect pistons for boost. Keep in mind that your head's combustion chamber affects your ratio. So when choosing pistons, they usually llist an example head chamber. Maybe you already saw that/know that, but thought I would add that. Detonation is a bitch on pistons. I think you will be fine with them though. Just get a good tune. Depending on what you have for compression now (assuming stock 9:1) then yes, you can run more boost. __________________ A whole bunch of crap that makes the car go fast

February 10th, 2010, 10:46 PM	#5
RDY4WAR I Post Entirely Way Too Much 07 Turbo Focus 12.93 @ 105mph Join Date: Feb 2010 Location: Glen Burnie, MD Posts: 6,073 iTrader: 0 reviews	With 10psi you should be safe, just keep the timing down. I agree with the second post. Proper tune or pistons. You'll make more consistent power with the tune. __________________ 2007 Focus - 230/215, cams/head/manifold swap done, new #s soon ...going E85! 1985 Bronco - 351W & 4WD 1986 Mustang LX - 351W build in the works! David Michael Smith, 07/25/1956 - 12/08/2011 ...R.I.P dad! I miss you dearly!

February 11th, 2010, 09:07 AM	#6
uedlose Regular 89 Mustang Join Date: Oct 2008 Location: Middle Way WV Posts: 180 iTrader: 0 reviews	it is cheaper and much easier to go ahead and put the forged pistons in now. gives room to move up the boost and they are just more forgiving,they can take more abuse. Rattle the engine and you could be buying them later anyway even if you have a good tune. get some bad gas and not know it, some bone head puts the wrong gas in the wrong hole at the pumps when filling the tanks. just do it and be happy you did. it is also a better selling point if you want to sell it. even with a good tune it always seems mustangers can tear up a iron piss pot and with boost it only happens faster. LOL ask me how I know. __________________ Just another turbo Mustang..No dyno numbers just good ets and MPH. And yes it is fast for a street car. few parts for sale https://docs.google.com/document/d/1...l=en_US&pli=1#

February 10th, 2010, 09:26 PM	#3
dkbanjo Newbie Join Date: Feb 2010 Posts: 8 iTrader: 0 reviews	Are the pistons usually the first to go? also, the pistons I was looking at are a 8.5:1 ratio(dish) will I have a noticeable change in power( more or less) . Will I be able to run more boost? Thanks

February 11th, 2010, 12:43 PM	#7
dkbanjo Newbie Join Date: Feb 2010 Posts: 8 iTrader: 0 reviews	Thanks for the replies, I think I'll get them just to be safe.

February 11th, 2010, 12:50 PM	#8
FastStang91Lx MM Fanatic 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 4,802 iTrader: 2 reviews	Just don't skimp on the tune, and you'll be really happy __________________ A whole bunch of crap that makes the car go fast

February 11th, 2010, 04:17 PM	#9
408w Fox Regular 1993 Mustang GT unk right now as fast as i can push Join Date: Feb 2010 Location: Topeka KS Posts: 169 iTrader: 0 reviews	dudes right __________________

February 14th, 2010, 08:48 PM	#10
dkbanjo Newbie Join Date: Feb 2010 Posts: 8 iTrader: 0 reviews	I purchased them, Thanks

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