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Old 06-21-2013, 03:37 PM
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468 BBC build-fill in the blanks

The basic outline is a 12.5 compression or higher race only with a soild roller cam, in about a 3,0000 lb car with a glide.RPM range from 4,000 to 6,500 or 7,000 grand.Let's have some fun filling in the blanks.Merlin or Iron Eagle steel heads.Kind of excited to get this game plan started.

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Old 06-21-2013, 07:24 PM
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JE or SRP forged pistons??.Isky or Howards roller cam??. Who's forged rods???. Who's roller rockers??.Who's forged crank???.
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Old 06-21-2013, 08:53 PM
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Whose pocketbook?
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Old 06-22-2013, 01:22 AM
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when I built my LS-7,I used carillo rods,JE pistons,GM forged steel crank,herbert cam(chet) Manley severe duty 1 piece stainless valves in LS-7 castings,2.25/1.88,had them professionally ported
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Old 06-22-2013, 04:47 AM
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Whose pocketbook?
Me.The balance point is I don't want to spend for aluminum aftermarket heads,but I am honestly looking at steel aftermarket heads.
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Old 06-22-2013, 07:32 AM
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Merlin heads
SRP
Howards cam
Eagle H-beam rods
Elgin, Eagle or Comp Products steel crank.
Harlan Sharp rockers.
Manley valves
Isky springs

With exception of the high comp pistons ( I use Probe). I have built several reliable street/racer type BBC's with above parts.
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Old 06-22-2013, 08:16 AM
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Bob this will be for a race gas only/race engine.I was hoping to use the 320 heads on this 468 and maybe the same ones on a 496 build later.
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Old 06-22-2013, 07:47 PM
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Quote:
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in about a 3,0000 lb car with a glide.
The car is a little heavy for a 'glide, 2800 or less would make a better combo. If the car has to be 3000, then a 3-speed might work better.
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Old 06-22-2013, 09:08 PM
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As Always I take your suggestions seriously.Two things come under considerations. A two shift trans would be more consistent and a glide is lighter.Comments please.
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Old 06-22-2013, 09:21 PM
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As Always I take your suggestions seriously.Two things come under considerations. A two shift trans would be more consistent and a glide is lighter.Comments please.
Just passin' on info that I received from savvy racers. Lighten the car.
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Old 06-22-2013, 11:17 PM
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The powerglide has less parasitic drag. A most of the small ss cars use glides IE: 265/55 chevy,they run 11.60s with a glide and stock heads,265 cubes
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Old 06-23-2013, 08:56 AM
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One of the reasons why running a superstock is so expensive is becasue the engine has to rev really high.
The valvetrain for that is very expensive and requires maintance.

The glide dictates a very very high rear gear ratio and very high trap rpms to allow it to work.

It is a fatal error on this car. The car will be too heavy with cast iron heads too.
The two combined will create a expensive slug.

get a th350/th400 and aluminum heads The glide is not more consistant in this car. But it will be consistantly slow and boring.

its not a 700/800 hp 505ci/555ci 2300lb supergas combo.

Why are you planning to build two engines now and later when they are practically giving away complete carb to pan race ready GMPP 572's 720HP?
THAT WILL PERForM WITH A GLIDE, in a Malibu... (But even better yet with a th400)

The only reason they use a glide in superstock classes is because the engine/trans combo rules say so.

Last edited by F-BIRD'88; 06-23-2013 at 09:14 AM.
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Old 06-23-2013, 09:25 AM
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To lighten the car is apart of my thought train.Glass fenders,hood,bumpers,header panel,trunk lid,full lexon is what I have been thinking.Stripped inheritor with a brief aluminum dash.Even me,I have lost 20lbs and hope to get below 200lbs for the first time in 40 yrs.
I insist I will never spend for aluminum heads for this BBC and that is going to make it a tad harder,but that is what it is.Looking at Merlins or Iron Eagles.Again solid roller rpm range from 4,000 to 6,500/7,000 with a SCR@ or around 12.5 or better.Don't mind spending for race gas.For this 468 it is kind of a blank slate build sheet.So any and all input is more than welcome.It honestly has been many yrs since I built a BBC short of the aftermarket stuff which isn't the same thing.Many yrs in SBC's through.This one I'm going to have fun building,but my long term plan is to have Pat Pro build a steel headed 496.I want to drive this car with the 468 to get settled in it and work out any issues before moving up to the 496.

I'm hoping everyone chimes in to have some fun with it.That it turns out to be a long informative thread for all.

Thanks all,

Gary
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Old 06-23-2013, 09:44 AM
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F/Bird.What scares me is building this car and not have it deadly consistent as much as a glide might be and the extra wt a 350/400 would be.Honestly I am not debating your suggestion.I appreciate your input.Truly I do.I want to be able to dial within .001 round to round once I tune this car no box two step.It's that high expectation that I want from this project.And as we talked,do that on easy passes.
Please pass on some info about that.

Thanks,

Gary
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Old 06-23-2013, 09:54 AM
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I didn't say this.This pass Wed's I had surgery on my back.So I'm going to the beach to relax and work on my tan.I'll be back later to day to pick up the thread where we left off.
I am very excited about this project.Again any and all input is welcome.All I ask is to please,please keep it civil.

Thanks much guys,

Gary
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