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462 cubic inch big block chevy in a 1987 turbo 2 fc

462 cubic inch big block chevy in a 1987 turbo 2 fc

Old 07-14-10, 10:18 AM
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IL 462 cubic inch big block chevy in a 1987 turbo 2 fc

Well im on my way with my big block fc the full size big block radiator is almost mounted .this is a tall order because just the basic radiator is wider than the frame rails minus the mounting brackets .also the over all length of the big block requires that there be at least 32 inches from the firewall to the front of the water pump.another problem is the brake booster -its in the way as well .the power brake issue is not an option -they are a must .so to solve this i will be mounting a vanco remote pump master and slave cylinder under the dash (oh did i mention there is no heat or air now ) dont need them this car will be street legal but not a daily driver.the tranny is a m-22 muncie 4 speed that will fit fine -my last one with a small block had an m-21-----anyone that has any good input on a big block in an fc would be helpfull ---thanks-jason
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Old 07-14-10, 10:49 AM
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Why not use a hydraboost for the brake master? That should get you the clearance you need. I'd expect you'll want power steering with a big heavy sucker like that over the wheels.

I'm not a huge fan of the big block FC swaps, but definitely post up some pics if you get a clean setup figured out.
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Old 07-15-10, 08:59 AM
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thats the unit im going to get its a vanco unit but its mega expensive ---1300.00 bucks!and i was thinking of using a seperate 3 line unit like or another rx7 pump to power the pump in the vanco unit-the funny thing is the front air dam i made for it bolts up in the farthest front bolt holes they look even side to side but the frame rail on the passengers side is 5/8 taller than the drivers side so i made a bar that overlaps its self by 5/8 and made the rest of the dam out of 1/8 6061 with a gusset to the across bar .the frame had to be cut an inch in on a side to make room for the tanks on the big block rad. the rad.has an original molded shrowd and is a super common radiator 67-68 big block camaro radiator (4 speed no cooler in tanks)i will be making rubber isolators for the bottom rail on the radiator the frame for the rad. drops down even with the air dam .----------the only thing i dont like is that in this placement the radiator will be through the hood ---honestly its 19 inches tall by 29 inches long tank to tank!! big rad for a big engine.this also means that the hood latch is gone . but i have plenty of time and a full machine shop at my disposal.the hood scoop will be made of 6061 1/8 so it wont warp and the front will have air scoops to push air to the top of the radiator.....ill keep pecking at it --thanks for the interest ......jason
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Old 07-15-10, 10:42 PM
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also the difference in weight between a cast iron small block and a cast iron big block isnt that much ---small block is 550fully dressed and a big block is 685 not a huge weight difference --my last one was a .060 over 327 cam geardrive headers performer rpm high rise fair .194 intake valve heads(around 325 horse(guess) the 462 thats going in this car is no guess 464 h.p.at 5800 rpm and 500 ft pounds of torque at 4200---and it has plenty of room to grow on
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Old 07-15-10, 11:05 PM
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oh one other thing ----the ls7 is not a big block its an alum.small block that they put in the z06 corvette and from what i have seen and heard -im going to stay away from those.-i hear and have seen that if you try to get too much h.p. out of one that the block breaks off at the rear where the bellhousing bolts on ! i always use a scatter shield and a block saver but i also stick to the old school stuff .the z06 vette engine is suppose to be rated at 550 h.p.-the main reason i wanted to build mine is to have a ton of low end power and not have to wind the motor to 6500 or better to get the power and because ive never seen one in an fc rx7(well one )it was a cobbled up drag car that some one cut up the sub frame to fit the motor in .its all in what a person likes and i know this site is very pro rotory--jason
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Old 07-20-10, 09:29 AM
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well lets see the lower radiator support is almost done -all made out of alum.now i need to redo the upper support by adding back to the braces that were just inside the top channell that use to run across the front -now its removed because the radiator is above it (19 inches by 29 inch radiator) so i will square out this opening and rebrace back down to the frame as well as make a mount for the top of the shroud --when i get the radiator support top and bottom done i will post a picture of it---jason
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Old 07-26-10, 09:11 AM
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well now im on to the mounts for the radiator for the bottom -has anyone else on here ever put a real big block chevy in an fc before? its not goin too bad so far i must say but im not to the oil pan scattershield to the tranny tunnel does it clear part yet. that will be the worst hurdle i can see so far.-----------any input besides why -or dont do that to a mass produced car comments----jason
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Old 07-27-10, 04:04 AM
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bbc!

I don't have to ask why I get it. I want to see a pic or two.
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Old 07-31-10, 03:46 AM
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well i havent taken any pictures yet . got the lower mounts for the rad. made .i left an inch for the the harness for the horn and the 5 or so relays ---dont really like that kind of gap under there i know i have to have some space to fit the wires but i think ill work the horn and relays in while i shorten the gap to a min. as well as use 2 rubber isolators to keep any vibration from the radiator. i will have to fill any gap thats left after the wires are run to keep all the air i can going thru the rad.not around it .doesnt take much time to make the parts its all the the time to engineer them that takes the time...oh well i keep moving forward -jason
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Old 08-09-10, 09:14 AM
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well the lower radiator mounts are done on to the uppers . for this i will be opening up the 4 holes that are close to the front bumper mounts(like 3 inches away)originally they are not thru the frame rails and almost impossible to get to with a drill(with the headlight assy.on the car ---so i turned up a set of washers that fit inside the holes and transfer punched thru them to make an on center place to ceter drill them then used a die grinder to open them up just so a small shoulder is left .this morning i will make 4--- 1/2 thick spuds that have a 1/4 20 tapped hole in them and weld them in. this will make a place so i can make brakets to attach the upper radiator mounts . i will not post a picture until the radiator is completely mounted and the front upper shroud is done.-jason
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Old 08-16-10, 09:05 AM
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well over the weekend i got started on the upper supports for the big block radiator -and being the fact that there is only 2 inches on each side clearing the tanks of the radiator +the fact that the mounts on the radiator are 8 inches up from the frame i made the supports out of 1/4 6061 alum. they are just 90 degrees right now bolted together at the bottom with 4 #4-40 82degree screws-in the corners i will support them with a gusset made of the same -this also acts as an air dam to keep air from going around the radiator.i will be using expanding boat plugs with a square like a carrage bolt molded into them as the vibration isolators between the mounting flange for the radiator and the alum.brackets.......seems like im talking to my self on here i know but im getting there slowly...jason
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Old 08-17-10, 03:03 PM
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OR not talking to yourself

I'm listening.
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Old 08-18-10, 09:05 AM
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it all takes time +have to work for a living as well -but i did get the upper braces in place and the rubber mounts sized up .just need to build the gussets for them now -im tryin to stay on the light side to keep the weight down -going to make my own strut braces for the front and rear as well -it would do no good to buy them as the big block will sit higher and is also huge compared to the rotory--kinda sucks that the speakers are right on top of where the brace will go in the rear-still have 2 high dollar items to get -the grannys 8.8 rear for it (3200.00)and a hydro boost remote brake booster master and slave all in one(over a grand) do you have a car in the works?--jason

Last edited by gearhead670; 08-18-10 at 09:06 AM. Reason: spelling
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Old 08-18-10, 01:30 PM
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I have an 88 gtu. I plan on putting the small block 355 thats in my 77 nova into my rx7. I havent started yet but it will happen. When the small block comes out of the nova I will put a big block in it. I haven't started yet because both cars run and need other stuff done. Right now im working on the rx7's sunroof.
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Old 08-18-10, 02:18 PM
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post pics
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Old 08-18-10, 04:52 PM
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Seems like an interesting build, I'm in for pics when you get them!
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Old 08-19-10, 10:59 AM
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i dont even own a digital camera yet -funny thing is i bought my daughter a 300.00 nikon -should get one soon i guess.---obese i made sure i got an extra 454 to test fit what i have going on ---the pan is going to be the major hurdle -wish i could get those ball and socket headers like i used on my last v-8 rx they work great perfect fit!it was a 327 4 speed car-sold it to my brother and after all the beatin i did to that car the very first time he took it to the drag strip he snapped the axle like a twig -and that thing has no where near the h.p. and torque my 462 has. hopefully i should get the braces done by the weekend ...and i want to do a lot more beefin up of the area still...the hood latch is going to go back in front of the radiator so it needs more support.......jason
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Old 08-19-10, 12:13 PM
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Thats an ambitious project. I wish I was not so lazy.
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Old 08-19-10, 12:30 PM
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ive seen one other fc with a big block -drag car small radiator ------thats why i started with the radiator -as big as i could reasonably fit in there-and bracing the front of the car so that i canmake sure the car doesnt twist.because no guy is ever happy with how much horsepower the car has after a while he always wants more .helps to have a machineshop to make my own parts .i want to use every stud thats on the strut towers and wheel wells to brace the car all i can .this car is going to take quite a bit longer than the last one--jason
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Old 08-21-10, 02:00 PM
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well i have one upper radiator support bracket almost done -came out very light and strong -its a good thing because im going to be attaching a bar that runs across the the other side -in the middle of that bar will be where the hood latch will be re-attached .another benifit of this bar will be that it will connect to where the rubber bumpers are at (very front of rad. support) to provide side to side support as well as the latch+cover that will be by means of a 1/8 flat plate of 6061 then to the same plate and bar will be a double 90 degree angle to attach the stock shroud for the 68-69 camaro bg block radiator .after thats fit i will box the rest of that area in with 6061 to conform to the basic shapes in square form with more #4-40 screws or #6-32 screws.--------back at it --jason
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Old 08-27-10, 08:54 AM
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should get the last pc.drilled and tapped today for the upper rad. brackets (took a lil longer than i thought )but it does go better when ya have fixed points .only 2 more holes after that and the entire radiator will be in its place! hopefully this weekend i will get to run into town and find a pc of square alum. to hold the hood latch and tie the upper radiator brackets together.more to come ...........jason
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Old 08-27-10, 01:50 PM
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This would make a lot more sense if there where a few pics. Pick yourself up a camera wile you are in town. Did you say what you are going to do about the rear end?
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Old 08-27-10, 06:43 PM
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What are you going to do with the rear end? Iv seen people put a solid rear end but always wondered how they bolted it up. anyways I wanna see pictures please!!
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Old 08-27-10, 08:01 PM
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ya i know i should get one (a camera that is)--i know im going to need to upgrade the rear but i believe ill get it going first before i drop the 3000.00 on the 8.8-go to grannys web site to see how the rear goes in ---it retains the brakes and the struts and the brace that bolts to the rear prevents the wheel hop.------got the other upper radiator bracket done.2 more holes and no more clamps to hold it in!!!----getting there
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Old 08-27-10, 08:43 PM
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I think this is bad ***, completely crazy, but bad ***.
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