the c4-bbc engine swap







this has never been a cheap or easy hobby and the more you learn, the more you realize there's always a situation where you have just upgraded several components only to find that that upgrade resulted in the need to , upgrade some other system , like the ignition, brakes, cooling or drive train durability.
you'll always find you are forced to learn new skills and upgrade the quality and durability of parts if your intention is to vastly increase the cars power, high speed stability, braking, cooling and over all driveability, especially if you think racing against similar cars at higher speeds is you goal.

you might not initially realize all the mods that a true performance upgrade requires if its done correctly, and yeah, its always going to be much more expensive than you might have initially thought as there's alway incidental but required upgrades.
constant research on your options and carefully balancing the potential performance against the potential cost and difficulty in matching all the components, and verifying they fit and function properly,
as to not compromise the max performance, can at times be rather difficult, especially when you will be forced to conclude there's always the need to do at least some custom parts fabrication work' there's almost zero chance for an example that you can install a tall deck,BBC engine in lets say a 1996 corvette without having custom motor mounts, transmission mounts a upgraded rear differential, a custom exhaust and custom headers, and obviously installing better brakes more gages, a much bigger and more efficient cooling system, an oil cooler, a transmission cooler and a dozen other upgrades.



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chevy 1000 hp crate engine EFI
 
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On my TBucket forum we have this lady that lives on the island of St Croix and is building a
TBucket with a 632 BBC. Oh, and btw she is 71 years old. She is technically savvy and can fabricate
when needed.

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Little Car 4r.jpg_Right Front Qtr 3r.jpg
 
thats impressive in several ways,
could you post a list of the engine components she used to build that 632?
 
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She drove drag boats in her younger years. Pretty sharp on electronics also, she
has designed some project for the casino where she works.
 
So, I have a bunch of updates with no pictures, only measurements.

1) The picture on the previous page that I asked you about with the flat 6-rib balancer that was bolted directly to the balancer that cleared the steering rack.

I tracked down the owner, and he did not have to relocate the rack.

2) I purchased the correct 1Pc RMS BBC to 700R4 flywheel from TCI, bolted right up to the stock 700R4 (in the garage).

3) I purchased the Speedmaster (I know I know, but it had decent reviews, and it was the only one I could find that was not $650)
https://www.speedmaster79.com/Chevy...I-Apprv-Ext-Balanced-Harmonic-Damper-Balancer, and it is 6.75"

4) I purchased the Dirty Dingo Slider Mounts https://www.dirtydingo.com/shop/product_info.php?products_id=1363
It adds 7/16" of height. Not good if you are trying to use the stock hood, Great if you are trying not to have to clearance your crossmember.

5) I Purchased the Low Profile old style twisted Edelbrock BBC O Torker, which has a carb pad height of 3.75" I picked up a fitech, it is exactly 3.5"

Motor mount location to China Wall, the BBC is .77" Taller, so if we add all of that up, we get a height of 8.4575 directly at the highest point center of the fi-tech over where a stock sbc bolt would be.

There is 8.5" of clearance from the bottom of the front of the stock tpi intake to the hood in the front, and there is 9.5" of clearance from the bottom of the intake manifold to the hood in the back of the block, with a stock tpi engine in there. that should work out to about 9" of Clearance in the middle.

I found this drop base air cleaner CHP-JR511B-1. It is a 2.5" drop with a 1/4" Offset. If I bias that towards the rear, its better because as you go to the rear of the car the hood clearance increases.

This filter K&N
E-3742 is 2.813" tall so add another .3" and that gets us to a slightly past the centerline of the carb pad tallest height of 8.7575.

I of course am going to have to order and test fit all of this stuff together, and it is a very specific list,

but I am fairly certain that this is a recipe for a straight drop in, no cutting necessary, big block installation into a C4 corvette that doesn't require rack relocation, K-member modification, and clears the stock hood.

The Torker intake will certainly be the weak point of this package, but good heads, a decent roller cam, and with the torker as the choke point, I don't see why 550 hp crank is not doable, and that is something of great interest to me.
 

MarauderPrime

I love the info contained in this post, it could easily save you over $1000 in the swap
THANK YOU FOR POSTING!
 
I was recently talking with a guy (about 14 months back while I was still in FLA,)
who had a 598 BBC built, to stick in his 1967 GTO, with a TH400 and 3500 rpm stall converter,
he felt the engine should have produced significantly better torque.
( keep in mind this is a trailered track toy)
ID previously made several suggestions (he mostly ignored)
after asking a lot of questions about the build. the components he selected and used, and tuning,
it seemed rather obvious to me he had just purchased the parts used based on mostly the component cost,
I suggested a few minor tuning changes, and strongly suggest he re-think the exhaust/headers....
maybe replace the headers and get a totally different exhaust system,

he was not pleased with my suggested changes /
well out of the blue he emailed me to thank me, as he had implemented a few changes and learned to tune a bit more consistently.
and he said it TRANSFORMED the result's ,he says he went from low 12 seconds to very low 11 second 1/4 mile times and his car never had decent traction, even before, now the increased torque, well he says its basically like driving on ice with bald tires.
keep in mind hes driving street tires no slicks
 
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