Line Hone help!

**MKUBIAK402** · 08-19-2006 08:02 PM

Hi I am new to this stuff I got my first BBC 402 last summer and i am in the begging of assembling it. the block was line honed and I see main Barings for cranks that have been turned but what do I do if it was line honed? And I picked up a gear drive set will I have trouble installing that???

**pat mccarthy** · 08-19-2006 09:01 PM

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**1JohnnyO** · 08-20-2006 06:31 AM

Agree with Pat....dont go with the gear drive. It does nothing good at all. And you might think the noise is cool for now, but believe me, in 3 or 4 months, you will wonder what you were thinking when you put it in. Just go with a good double roller chain setup. John

**Roy@RoysAuto** · 08-20-2006 06:54 AM

I don't quite get what you mean by main bearings that have been turned. Whe I build a motor I make sure and line bore the block to make sure that all the crank journals are perfectly true. After making sure the crank is right I just install the proper bearings with assembly lube and go for it. As far as the gear drive goes. just make sure and read the directions that came with it and you will be fine. PS they really make a blower stand out

**techinspector1** · 08-20-2006 09:08 AM

It has been proven time and again that you can make more power with a chain than you can with a gear. If it's just that you want the noise, go for it, but I will venture to say that you'll be sick of hearing it in a short while in a street driver.

**MKUBIAK402** · 08-20-2006 12:15 PM

Originally Posted by pat mccarthy

well i would not use the gear drive any way . are you saying the block as cracks in the main web . not good i have used some blocks like this but they are not to hot .i would walk on a block like this they can be more trouble in the long run this tells me it did get very hot and the main caps have been shrunk by heat and they would need to be welded or you can work the iron on the block by moving it with a big brass blunt chisels if the caps are welded they need to be side cut to fit the block . i have done this many times before i get the block line bored i like it fit my caps before they get bored out.if this the register is loose then the block is not in good shape .the registers help the caps from moving side to side . have seen them welded in the main here from cracks and have run a liner in the main oil feed hole to so there would not be any oil drop to the mains. all work i listed should be done by a pro. this may not mean that any of it was done by the machine shop when the block was done.this is why i do the caps myself . you can get timing chain set for line bored blocks

Man, I have no idea where the heck you got all that from. All I was saying was that I had my mains line honed by the shop, and I was wondering if there is gonna be any problems with putting standard bearings in. Do I need to go larger? They were just honed and not bored. The block has no cracks or dammage and is fine. Also whats up with everyone hating on my gear set. I know what they sound like and its fine. I just wanted to know about any potential installation issues with this.

http://www.cardomain.com/ride/2263635/1

**1JohnnyO** · 08-20-2006 03:15 PM

The question about the line honing is probably best asked of the engine shop that did it. They can tell you better than anyone else. Otherwise, put the caps on, torque them down, and measure the bore. See if it's still within specs. If so, you'll be fine. If you're building this yourself, dont go without measuring everything. Is easier to do it now than to have to pull it apart later. And as far as the gear drive, if it's the noise you like, go for it. I think the feeling of most people is that they are something that sounds cool at first, but gets old really fast. I know mine did many years ago. I'm of the opinion that if you want a blower type of sound, get a blower. But to each his own. As far as installation problems, Im sure you got instructions with them, just read it twice before you start. They are easy to install and fit. And Roy, could you explain this a little more??

PS they really make a blower stand out

I think a blower that's set up right has a sound all it's own, and certainly stands out on it's own. John

**erik erikson** · 08-20-2006 03:45 PM

Originally Posted by MKUBIAK402

Man, I have no idea where the heck you got all that from. All I was saying was that I had my mains line honed by the shop, and I was wondering if there is gonna be any problems with putting standard bearings in. Do I need to go larger? They were just honed and not bored. The block has no cracks or dammage and is fine. Also whats up with everyone hating on my gear set. I know what they sound like and its fine. I just wanted to know about any potential installation issues with this.

http://www.cardomain.com/ride/2263635/1

Was the crank turned also?

**Dave Severson** · 08-20-2006 03:58 PM

Originally Posted by MKUBIAK402

Man, I have no idea where the heck you got all that from. All I was saying was that I had my mains line honed by the shop, and I was wondering if there is gonna be any problems with putting standard bearings in. Do I need to go larger? They were just honed and not bored. The block has no cracks or dammage and is fine. Also whats up with everyone hating on my gear set. I know what they sound like and its fine. I just wanted to know about any potential installation issues with this.

http://www.cardomain.com/ride/2263635/1

Hopefully when they align honed the mains they cut the caps before they honed the main bearing bore. If it is done right, no reason to run any bearing other then the bearing that is correctly sized for the journal diameter of the crank. As far as all the information on checking the cap registers, it's more for building a true blueprinted motor vs. just bolting one together with store bought parts..... No reason to get all up tight because Pat gave you more information then you wanted. Then the dreaded gear drive. All anyone said is that they make an ungodly noise that will sometimes not allow you to hear other malfunctions in your engine, and that a chain and gears actually produces more horsepower. I would just add that a gear drive does away with the ability of the chain to absorb some of the harmful harmonics produced within the reciprocating assembly. But hey, run your gear drive and impress the kiddies if that trips your trigger......

**pat mccarthy** · 08-20-2006 04:40 PM

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**Roy@RoysAuto** · 08-20-2006 07:24 PM

My 32 Plymouth is going to have a 350 with a 6-71 Blower. I know it sounds really good all alone but I really just wanted a gear drive to have more precise timing and didnt really care about it's noise. This is a very mild 350 so that I can drive it on the street dependably. Plus I was bored one day

**pat mccarthy** · 08-20-2006 07:57 PM

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**erik erikson** · 08-20-2006 08:09 PM

Originally Posted by pat mccarthy

gear drives do not do any thing but make noise and can make harmonics and can break valve springs and for timing less you are driving the dist backwards with a customs cam and gear to gear timming set . this will have no idle gears. with a idle gear you will some back lash and could have spark scatter .so no power will be seen just more harmonics .if you want to make power run a belt

Pat,you must be reading my mind.What you said covers the subject 100%.
A lot of people still don't get with a gear drive all the harmonics from the valve train are transmitted directly to your crank.

**pat mccarthy** · 08-20-2006 08:21 PM

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**erik erikson** · 08-21-2006 09:38 AM

Originally Posted by pat mccarthy

yes you will not see any hard core engines with them. less they have stock in a valve spring company and for stock stuff they are just no good . i should stop trying to help talk guys out of them and start selling them on Ebay and start making the big money

what do you say erik want to start selling them ??

I don't know if I could sleep well at night knowing that a $50 timing chain would work much better for them.

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