Modified hot air intake questions ?

[BLACKHAWK38]

TO all you guys that have hacked open the 84-85 intake manifold, What are the things to DO?

I will be retaining stock air inlet hole in the back , would like to know more about how to shorten the runners and make them bigger perhaps,

Problem seams to be trying to get Equal Runner length??


all input appreciated , good or bad

Thanks, Blackhawk 38

 

[TRiv]

Some positive news though I would still like to check on a few things, the 86-7 manifold can be easily used on the 84-5 turbo Riviera ( not T Regals/ GNs though) without converting everything over. This is an advantage the Riviera has, though doing a complete 86-7 intercooled conversion for the Riviera will involve more than the Regals due to header/ downpipe plumbing.

In tinkering with the hot air engine I have on engine stand for the 86-7 set up plus twin turbo, twin intercooler, re arranged the parts back to stock Riviera set up with exception of leaving 86-7 intake on ( nothing is torqued yet, just mock up), and found that accesories and turbo/throttle body can stay where they are, turbo hanging off back off engine. All that is neede is a simple bracket that can be attached to the 86-7 coil pack bracket ( on back of manifold) , it's right there waiting to support the turbo! Again all accessories stay where they go, even the bracket that goes at top of alternator bolts to the manifold at dog house. Hood clearance is no problem, as the doghouse is at same height of the turbo u-pipe and alternator.

The work to be done will all be plumbing. Upper radiator hose to manifold is 1 1/2 inch from fitting but room is there to make it happen. Heater hoses, use 86-7 tubing and connect. Re route pcv valve, easy. The toughest though still relatively easy is plumb turbo outlet to fron of doghouse, though there are many ways to route, and it can even look good.

If going through all this trouble though might as well get an 86-7 intercooler, some customizing will be needed to the brackets though as the Riviera motor mount at the front is in the way by about 1/2 inch, so the fit is real close. Use the stock up pipe and a small adaptor tube needs to be made where th 86-7 throttle body would go, and it needs to be slightly z shapped to clear alternator bracket, this would connect the output of IC. Plumbing from turbo to IC a bit more tricky but the room is there.

Need to check if GN IC scoop can be used, and of course a fan needs to be mounted behind IC , and electric fans in front of radiator. Details, of course but the swap for the Riviera can be done and a lot cheaper than the Regals going this route. I might fab up the plumbing while still on engine stand just to have in case I upgrade the Riviera, but right now the project car is taking all available hobby money. Did finally collect all the conversion parts and then some, hoping to fire that up late spring early summer. When I find remaining details on intake swap for Rivieras, if your interested I'll keep you posted.

 

[TRiv]

Forgot, you can use the stock Riviera fuel rail/ injectors, fits the manifold/doghouse no problem.

 

[turbofish38]

Hey,I like that idea. Have you considered making a new doghouse so you wouldn't have to run a lot of tubing on that setup. My thinking would be along the line of turning the doghouse around with an adapter and hose to attach the compressor to the DH. To bad the bolt pattern isn't assymetrical otherwise you could use the stock DH. Maybe even incorporate a built in power plate on it.

 

[typhoon]

If it were me, and I wanted to keep the stock inlet, I would open up the bottom and gut it. Ribs and all.

Then weld in a new floor.

Equal length IMO is not needed as much as just pure good flow. With turbo I think that advantage is minimal.

Doing as above will make the runners all about the same anyways just very short.

I have pics on my website gallery. www.jsmanufacturing.com

and will be offereing modified intake in the very near future.

Jeff

 

[BLACKHAWK38]

Hot air Intake

Hi T-RIV, It's been a while since I talked to you, sound like you got the low down on what will work and what won't .

I finnally got 2nd roller cam engine in the T-type Riviera, only 75 miles on the rebuilt, weather has been to $hity, am going to change over to 87 coil driver module,

My first roller rocker , roller cam engine with the spun rod bearing has been re-assembled with new parts, it will be a spare for now,

I bought a Cherry 87 GN, 19000 KM, it is a canadian model, G dam powermaster brake was bad, Just gettin to know this car, IT is 100 percent stock execpt for OEM size K&N filter in the stock housing.

I sent Jack Merkel a spare hot air intake to play with, HE is going to do what Typhoon suggested, take the restriction out of it.

Give me a Hollar T-riv,

AND also How are you doing EIRC turbofisher??

Regards, BlackHawk 38

 

[TRiv]

Re: Hot air Intake

Originally posted by BLACKHAWK38


I sent Jack Merkel a spare hot air intake to play with, HE is going to do what Typhoon suggested, take the restriction out of it.

Sounds like a plan, would be nice to get some before and after runs at the track to guage any improvement. Using a modified 84-5 or stock 86-7 intake I wonder what improvement there would be, bang for the buck and trouble, both are a bit of work. Cool on the 87 canadian GN!

turbofish38, making a plenum as you suggested would be the qwickest way to get an 86-7 manifold up and running, would have to be fabricated, many ways to do it, that u-pipe the Rivs have if cut in half would point right there! Going to have to prototype some stuff just in case. After buying all the 86-7 parts to convert, the intercooler itself is really a bargain price wise, most of the conversion stuff is brackets and accessories that don't add anything to performance, so installing one in the Riv would make the modification worth it.

I am glad I have the long term project going, so I can't start another, how about a rear wheel drive, intercooled (86-7 drivetrain) 84-5 Riviera with independent rear suspension Have to put trans tunnel in floor, maybe use C5 Corvette transaxle out back , torque tube etc., or just a conventional trans/driveshaft. Frame rail width on E and G bodies are the same... time to stop!

 

[irockwithdirt]

If interested.........have a V1 intake here off the car if anyone would want pics to see how its put together.

 

[BLACKHAWK38]

V1 intake pictures

Originally posted by irockwithdirt
If interested.........have a V1 intake here off the car if anyone would want pics to see how its put together.

I would be glad to see the pictures of that intake, as probably the other readers of this thread,

Isn't the V1 the first TurboMotion design? Does it retain the Stock air inlet location ? And does your turbo-Throttle body in the Stock Location?

Please Reply, Regards, BlackHawk 38

 

[irockwithdirt]

Yes, with this intake everything is in the stock location. I will try to get some pics posted today and put a link here.

 

[TRiv]

Here's an update on 86-7 IC and manifold install to 84-5 turbo Riviera idea:

The IC fits, and the scoop should too, the IC can be easily mounted to the Riv front motor mount bracket by fabricating a bracket that bolts to two lower bolts on motor mount that attach a rubber/metal block. This fabbed bracket would be bent and drilled to mount IC. To retain all the hot air accessories, etc., the IC has to be mounted about 2 inches left of center of engine (towards driver side), and mounted backwards, inlet facing radiator, this is because inlet would face alternator otherwise. The height location would be same as GN stock, and mounted as above, a stock 86-7 up pipe can be used for connection to intake. To work, the up pipe would be pointed at about 5* angle to goe in between top of alt bracket and coil pack, this will point it right at 86-7 doghouse, or using a tube to go to stock 84-5 intake port.

To use stock Riv intake, another stock 86-7 up pipe can be used to connect at intake port by cutting offabout 1 1/2 inch of short end ( IC side ) of up pipe and replaced with a machined collar same size as piece removed, machined with an o-ring groove and welded to up pipe, put this into intake port (with o-ring), connect two up pipes at midddle and connection is made. later a tab will need to be welded to this modified up pipe to hold into intake.

A much simpler way would be to use 86-7 manifold, make a flange with 1/4 plate steel, and cut a piece of 86-7 up pipe about same length as an 86-7 throttle body, install flange to doghouse and pipe piece to flange, locate angle (about 5* to clear alt& coil) to match intercooler, tack. Remove, weld up, ready to install!

Hood clearance is no problem.

As for turbo to IC , machine a collar same as intake port only to match turbo, run tubing to IC, will unfortunatly need a 1808 bend like the stock Riv u pipe only ther is room for a larger radius bend where the tube coming from turbo (running over and between left valve cover and fuel railcover, over coil the u into IC, if routed as I see it tube length will be minimal. A tab will have to be welded to tube where it exits turb to kep it mounted with o-ring

Will need electric fans for radiator

Some bracket fabrication to secure turbo to manifold (if using 86-7)

Only thing not sure as of yet is for IC fan, not to sure about welding anything to crank pulley to mount 86-7 fan not to keen on that for balance, maybe a small electric fan. With IC mounted more toward driver side the stock IC fan may not be efective anyway. One good thing having the IC over there in the Riv is because there is more open space on that side of engine bay for better airflow through intercooler, pass side is pretty packed.

That's it for now, looks workable, I am going to make some prototype parts just in case, oh, need to do some coolant plumbing also, nothing extreme there.