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help me get my b-1 originals back off the shelf . #483250 09/29/09 10:37 AM 09/29/09 10:37 AM
Joined: Oct 2005 Posts: 976 ontario canada mac56 OP super stock
mac56 OP super stock Joined: Oct 2005 Posts: 976 ontario canada	I had a good year pulling this year but just feel the cnc eddies aren't cutting it on the 496. I have a b-1 original set up that I haven't run for about 5 years. Just could not afford everything it takes to get them back on. I would like to do that this winter. This does not need to be a max effort mainly due to stock block. My question is what is the best way to go for pistons. Do you prefer flat tops and cut the heads. I run alcohol so need lots of squeeze. Thanks Mark

Re: help me get my b-1 originals back off the shelf . [Re: mac56] #483251 09/29/09 10:42 AM 09/29/09 10:42 AM
Joined: Nov 2004 Posts: 3,544 Syracuse,NY CompWedgeEngines master
CompWedgeEngines master Joined: Nov 2004 Posts: 3,544 Syracuse,NY	Always better to get the correct pistons. RIP Monte Smith Your work is a reflection of yourself, autograph it with quality. WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.

Re: help me get my b-1 originals back off the shelf . [Re: CompWedgeEngines] #483252 09/29/09 10:47 AM 09/29/09 10:47 AM
Joined: Oct 2005 Posts: 976 ontario canada mac56 OP super stock
mac56 OP super stock Joined: Oct 2005 Posts: 976 ontario canada	Quote: Always better to get the correct pistons. I will buy the correct ones but just wondering which is prefered flat top and reduce the chamber size or dome.

Re: help me get my b-1 originals back off the shelf . [Re: mac56] #483253 09/29/09 10:50 AM 09/29/09 10:50 AM
Joined: Jan 2003 Posts: 19,384 Las Vegas Al_Alguire I Live Here
Al_Alguire I Live Here Joined: Jan 2003 Posts: 19,384 Las Vegas	A small dome will make good compression with a b1. It actually will end up being a net 0 or less due to the large valve reliefs required on a B1 head. When you say a lot of compression what do you mean? One mans lot is another mans minimum "I am not ashamed to confess I am ignorant of what I do not know." "It's never wrong to do the right thing"

Re: help me get my b-1 originals back off the shelf . [Re: Al_Alguire] #483254 09/29/09 12:13 PM 09/29/09 12:13 PM
Joined: Oct 2005 Posts: 976 ontario canada mac56 OP super stock
mac56 OP super stock Joined: Oct 2005 Posts: 976 ontario canada	Quote: A small dome will make good compression with a b1. It actually will end up being a net 0 or less due to the large valve reliefs required on a B1 head. When you say a lot of compression what do you mean? One mans lot is another mans minimum I'm running 13.5 right now but maybe more is better

Re: help me get my b-1 originals back off the shelf . [Re: mac56] #483255 09/29/09 12:26 PM 09/29/09 12:26 PM
Joined: Jan 2003 Posts: 5,486 SoCal Brian Hafliger master
Brian Hafliger master Joined: Jan 2003 Posts: 5,486 SoCal	Quote: Quote: A small dome will make good compression with a b1. It actually will end up being a net 0 or less due to the large valve reliefs required on a B1 head. When you say a lot of compression what do you mean? One mans lot is another mans minimum I'm running 13.5 right now but maybe more is better That's fine for alky. You can run more, but it's not neccessary especially since your not looking at a MAX EFFORT build. You'll end up with a dome piston. I don't like milling the heads, you lose deck strength, V/P clearance, manifold fit, etc... Brian Hafliger

Re: help me get my b-1 originals back off the shelf . [Re: Brian Hafliger] #483256 09/29/09 12:36 PM 09/29/09 12:36 PM
Joined: Oct 2005 Posts: 976 ontario canada mac56 OP super stock
mac56 OP super stock Joined: Oct 2005 Posts: 976 ontario canada	Quote: Quote: Quote: A small dome will make good compression with a b1. It actually will end up being a net 0 or less due to the large valve reliefs required on a B1 head. When you say a lot of compression what do you mean? One mans lot is another mans minimum I'm running 13.5 right now but maybe more is better That's fine for alky. You can run more, but it's not neccessary especially since your not looking at a MAX EFFORT build. You'll end up with a dome piston. I don't like milling the heads, you lose deck strength, V/P clearance, manifold fit, etc... I ran a dome last time but I thought I read on here that most guys cut them for a smaller chamber and flat tops. I'm willing to do all the fitment if it is the best way to go.

Re: help me get my b-1 originals back off the shelf . [Re: mac56] #483257 09/29/09 12:38 PM 09/29/09 12:38 PM
Joined: Jan 2003 Posts: 5,486 SoCal Brian Hafliger master
Brian Hafliger master Joined: Jan 2003 Posts: 5,486 SoCal	Quote: Quote: Quote: Quote: A small dome will make good compression with a b1. It actually will end up being a net 0 or less due to the large valve reliefs required on a B1 head. When you say a lot of compression what do you mean? One mans lot is another mans minimum I'm running 13.5 right now but maybe more is better That's fine for alky. You can run more, but it's not neccessary especially since your not looking at a MAX EFFORT build. You'll end up with a dome piston. I don't like milling the heads, you lose deck strength, V/P clearance, manifold fit, etc... I ran a dome last time but I thought I read on here that most guys cut them for a smaller chamber and flat tops. I'm willing to do all the fitment if it is the best way to go. Not neccessary!!!!!!!!!!!!!!!!!!!!!!! You do what you want, but you will not see any worthwhile gains by doing that! Brian Hafliger

Re: help me get my b-1 originals back off the shelf . [Re: Brian Hafliger] #483258 09/29/09 01:42 PM 09/29/09 01:42 PM
Joined: Apr 2005 Posts: 1,107 Quebec, Canada D Diablo super stock
Diablo super stock D Joined: Apr 2005 Posts: 1,107 Quebec, Canada	With out 496 were 14.5/1 compression on gas. The 636 is 15.5/1 on the alchy You will se a world of difference with the b1'S!!! Poor stock block

Re: help me get my b-1 originals back off the shelf . [Re: Diablo] #483259 09/29/09 01:45 PM 09/29/09 01:45 PM
Joined: Oct 2005 Posts: 976 ontario canada mac56 OP super stock
mac56 OP super stock Joined: Oct 2005 Posts: 976 ontario canada	Quote: With out 496 were 14.5/1 compression on gas. The 636 is 15.5/1 on the alchy You will se a world of difference with the b1'S!!! Poor stock block Yes stock block Doug. That is why I want to keep things conservative.

Re: help me get my b-1 originals back off the shelf . [Re: mac56] #483260 09/29/09 02:04 PM 09/29/09 02:04 PM
Joined: Apr 2005 Posts: 1,107 Quebec, Canada D Diablo super stock
Diablo super stock D Joined: Apr 2005 Posts: 1,107 Quebec, Canada	Make sure you fill it, girdle, and alum caps, rods. After i did all that my stock block seemed to hold fine in the 496. 800-850hp range. Im sure you gonna see that or 900hp with the b1's

Re: help me get my b-1 originals back off the shelf . [Re: Diablo] #483261 09/29/09 02:42 PM 09/29/09 02:42 PM
Joined: Oct 2005 Posts: 976 ontario canada mac56 OP super stock
mac56 OP super stock Joined: Oct 2005 Posts: 976 ontario canada	Quote: Make sure you fill it, girdle, and alum caps, rods. After i did all that my stock block seemed to hold fine in the 496. 800-850hp range. Im sure you gonna see that or 900hp with the b1's I be happy with 800 Doug. Did I say that

Re: help me get my b-1 originals back off the shelf . [Re: mac56] #483262 09/29/09 07:17 PM 09/29/09 07:17 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	as mentioned the reliefs on the b1 pistons have a lot of volume. i doubt you'd loose much strength milling them as they're pretty darn thick in the deck but personally i never liked the idea of cutting heads for CR anyhow (for reasons stated). if you cut them down then it can be a problem if you put them on a larger engine. before you do anything get your numbers together and figure out what can be done. yes the FT piston is best but i wouldn't go hacking up the heads to get there. you really need to do the math first with deck height, piston to head and everything. i forget what the reliefs end up being with a b1 FT but iirc they're "roughly" -12 cc's. to get the CR up on that size engine you probably will end up with a small dome

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