Hey Dave: I'd like to know more about your setup (and the logic behind it)!

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

 

So what I'm hearing in this thread, it's worthless for me to convert to a studed narrow register straight 4 bolt main with billet caps over a studed two bolt? And the only 4 bolt conversion that's worth the trouble is splayed?

I was going to go to the straight 4 bolt main conversion since it is considerably cheaper than the splayed 4 bolt because they won't have to remachine the registers. I guess I need to think about this some more before I take the block to the machinist.

 

You could argue that there's no need to use anything other than the stock 2-bolt caps on most buildups. But 4-bolt caps will be a lot stronger. I doubt that the incremental advantage of splayed v. straight caps is of any signficance except for the most extreme buildup. FWIW I am making 733rwhp on straight nodular iron caps.

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

 

Thanks Eric!

So I guess its a "try it and see" sort of thing. I guess you would just measure the diameter of the hole to see if its still round after converting to studs?

Thanks,
Jason

 

Rich, What would you like to know?
I thought most people here knew what I had?
The Logic????
Well, for one, I saved over $5000.00 going with a carb.
Where do you think that extra money went?
If I was boosted or drove it more on the street, EFI would "maybe" be a better option, but with spray it's not a major benefit.


Dave Brown

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If a little's good,
More is better,
And too much is just right!!!

 

You told me what I needed to know (that it's a race setup with a carb). FWIW that makes it "exotic" in my lexicon! For 99.999% of "the rest of us" street and street/strip guys keeping the LT1 with EFI makes more sense.

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

 

Hey Rich
You said that you were making over 700 RWHP on iron caps. So is your set up a factor 2 bolt or 4 bolt bottom end?

Thanks
Matt mc

 

?

 

you saved $5,000 by going to a carb!?!? how so?
jeremy

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'93 z28 m6 (Purple Pearl Metallic)
stock shortblock, 230/236 cam, mildly ported heads, hooker longtubes, csi waterpump, all the usual bolton stuff.....
7.98 @ 88.7mph 1.84 60' (1/8mi)

 

Take my Scenario:

$350 LT4 Intake
$300 Porting
$2000 FAST
$500 Injectors
$500 Throttle Body
$100 Fuel Pump
$500 Laptop
$100 Regulator
$275 Opti
-----
$4625 Total

or

$350 Single Plane Intake
$300 Porting
$200 Machining for LT1 Bolt Pattern (Just a guess)
$1000 Carb
$300 Fuel Pump (Not counting new braided lines etc, since OEM can't be used)
$100 Regulator
$200 Distributor
-----
$2650 Total

Note that not everyone might need that $2000 FAST system.

I'm sure I'm missing some things, but when it comes down to it, if you have a perfectly good LT1 setup, its hardly worth going to a carb. Consider you wouldn't need to buy the intake, Opti, and a few other items.

No doubt Dave's personal scenario is slightly different, being a Gen1 SBCbut I think he's pretty well overexagerating there at $5k.

------------------
Kurtis Tamez
LT4-396.com
97 Z28 LT4-396
94 Firehawk LT1-396
Team NW F-Body

 

Factory 2-bolt converted to 4-bolt using GM straight nodular iron caps pn 3932482. It's what my engine builder reccomended so I went with them. No problems so far, though my setup is not a high-revver (6K rpm redline).

Rich Krause

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'95 Z-28 383 with Vortech, nitrous, etc.
"1FASTZ28"

 

Was this more of a budget issue or a means of averting "stretch" with billet caps?

 

strokedTA,

I have a carbed going into my 95 camaro in about two weeks. We are just going to tackle all the problems (cowl clearance, accessories, etc.....) as we get there but if you have done it any suggesstions or pics would be great.

Faccnator

 

He never really gave me much of a reason. Maybe he had a set laying around? He is sort of opinionated and I went along with it. All I can say is, it works!

Rich Krause