C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

350 4 Bolt Main Block

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Old Apr 13, 2009 | 01:11 PM
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Default 350 4 Bolt Main Block

I have been lucky enough to get my hands on a good condition bare block for free...I may or may not be getting the rotating assembly with it.(the answer to that in 2 hours.

I believe it all to be in stock condition. I don't yet know which 350 block it is, just that it is in usable condition and has 4 bolt mains.

Now, I have built a couple of engines in the past for dual specific purposes, but nothing quite like this attempt.

The other builds were for street/strip or DD/Off-road (as in 4x4 Truck).

I have finally decided what I want to do with my car(purpose-wise) and would like some ideas/advice from people who may have experience with the c4's.

I want to build a car that will primarily be driven on the street but can also be used for SCCA Hillclimb Time Trials.

I want it to have enough power to be fun on the street, (sneering 5.0 Mustang guy wise) be well mannered enough for traffic on occasion, and have a usable rpm range for the hillclimbs.

I have taken the suspension, safety equipment and brakes under consideration and have a viable plan for them.

While the block is free, nothing else will be. I'm not trying to build the engine in a week or even finish it this year. I will probably do this a bit at a time, but first I need a building plan. My usual method is to go with stock spec bottom end with balance/blueprint for reliability and then get my power from the air/fuel delivery, valvetrain, heads, and exhaust.

I would LIKE to keep the TPI if at all possible It was one of the things that attracted me to this car.

As I want the car to remain comfortable for the street, I won't be removing much weight, actually I may add a couple of pounds with sound deadening/heat barrier...

Any help is greatly appreciated...My budget is about $3000.00 for the engine. I don't mind going with used parts if they are in good shape for budget considerations.

Thanks JC

Last edited by JeepCycle; Apr 13, 2009 at 01:13 PM. Reason: add more info...
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Old Apr 13, 2009 | 01:22 PM
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A corvette used for hill climb???
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Old Apr 13, 2009 | 01:35 PM
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Originally Posted by Demonic85
A corvette used for hill climb???
Not a Motorcycle or a 4x4 you silly savage

I mean an SCCA event where they take a mountain road that is really steep has hairpin turns and block off a section of it and people race their cars against the clock...it's lots of fun and a really cheap way to get maximum enjoyment out of your car...

I wanted to use Wifey's LGT ScoobyDoo but she ain't havin' that...
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Old Apr 13, 2009 | 01:47 PM
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Are there limits to how much you can build the engine up?
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Old Apr 13, 2009 | 04:04 PM
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Originally Posted by Demonic85
Are there limits to how much you can build the engine up?
They run different classes...I don't care about which class I run in as I'm not really worried about winning races, I want to enjoy my car at it's limits and become a better driver(competing against myself)...it's really about beating up on the car I guess.

But I AM sick of the Mustang and the 3rd gen Fbody LT crowd...wanna have a little fun with them...
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Old Apr 13, 2009 | 04:27 PM
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You should try running it bone stock and see how it does first. I'm no expert but I would assume that torque and great suspension are key to a hill climb, in stock form it already has that. Its the 1/4 mile that the stock L98 sucks at.
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Old Apr 13, 2009 | 04:44 PM
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After a numbers check it turns out that The block is an OLD LT-1 Block from the early 70's...it did not come with the rotating ASSY someone grabbed that before I got there...dang it would have been a steel crank too...guess I'll be doing this from the ground up...
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Old Apr 13, 2009 | 04:46 PM
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Originally Posted by JeepCycle
After a numbers check it turns out that The block is an OLD LT-1 Block from the early 70's...it did not come with the rotating ASSY someone grabbed that before I got there...dang it would have been a steel crank too...guess I'll be doing this from the ground up...
nice grab, you gonna put solid lifters in like it originally came with?
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Old Apr 13, 2009 | 05:00 PM
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Originally Posted by Demonic85
nice grab, you gonna put solid lifters in like it originally came with?
Probably not if I can come up with a reasonable alternative perf/price-wise...it's way too much trouble taking the valve covers off this car...of course, if I also get rid of some of the CRAP in there that I have absolutley NO use for...that would be different...I want to find out what some of the more experienced people have to say...
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Old Apr 13, 2009 | 05:06 PM
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You dont have to run the stock accessories if you dont want to, especially if its going to be a "track" car. Some people on here are using setups that leave out the AC and AIR pump. Just run a search and it'll show pics.
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