My Corvette Life: 1990 Callaway Twin Turbo Project

Discussion of Corvette based Callaway Cars including: 1987-1991 RPO B2K Callaway Twin Turbo Corvettes (C4); Callaway SuperNatural Corvettes (CL-1/CR-1); Callaway C12; Supercharged Corvettes; Callaway C16; 6th Generation Callaway Corvettes (SC560, SC580, SC606, SC616, SC620, SC652); 7th Generation Callaway Corvettes (SC627/SC757); NEW Callaway C8 Corvettes - and more!
Sponsored by: Callaway Cars
*89x2*
Posts: 421
Joined: Tue Oct 21, 2008 9:58 pm

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by *89x2* »

Chris, look at SEM Brand paints. They are nice, and spray evenly with good matches to o.e. colors for trim, etc.

Speaking of things like this, check out this thread: http://callawayownersgroup.com/viewtopic.php?t=1272

Window Weld and SEM Chip Guard are two which come to mind :thumbs

Window Weld was used to hold AeroBody lenses in place and the Chip Guard is used on the black rub strip and rear plate fill areas of AeroBody.

Hopefully you find this info to be useful in your endeavors.
Never_Lift
Posts: 154
Joined: Mon Feb 07, 2011 7:28 pm

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by Never_Lift »

1988Callaway#16 wrote: Sat Oct 02, 2021 1:53 pm Welcome Chris! Nice find. I’ll be subscribing and watching. I have an 88 Callaway convertible #16 that needs some work also. Kevin


I’ll watch, but don’t subscribe (tin foil hat on), as this is interesting to armchair observe. I got nuthin to really add which hasn’t been said other than I fixed up a few TPI cars in my time and everything said so far is right

How’s 88/016 coming along, and where’s those videos

I’d watch that also if you did some to go with your work
User avatar
My Corvette Life
Posts: 7
Joined: Wed Sep 29, 2021 12:58 pm
Location: Gilbert, AZ
Contact:

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by My Corvette Life »

*89x2* wrote: Mon Oct 18, 2021 7:40 pm Chris, look at SEM Brand paints. They are nice, and spray evenly with good matches to o.e. colors for trim, etc.

Speaking of things like this, check out this thread: http://callawayownersgroup.com/viewtopic.php?t=1272

Window Weld and SEM Chip Guard are two which come to mind :thumbs

Window Weld was used to hold AeroBody lenses in place and the Chip Guard is used on the black rub strip and rear plate fill areas of AeroBody.

Hopefully you find this info to be useful in your endeavors.
Thanks for these tips. I've noted them down for future use. :thumb1
*89x2*
Posts: 421
Joined: Tue Oct 21, 2008 9:58 pm

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by *89x2* »

Glad to continue help. Perhaps you will consider adding a plug for www.callawayownersgroup.com to your videos :hi

In the meantime, a few things to note on your latest clip...

The triangular plate is from the NOS kit. It was installed to move the geometry of the throttle linkage forward with the NOS plate sandwiched in the throttle body/plenum area. It's not some fabbed up bracket as you explained. Whoever installed the NOS kit, butchered the lower bolt. Extract it, then helicoil the threads to install the factory bracket back into place. :cool

Next, take a look at your emblem on the plenum - the bowtie should be RED. You can touch that up easily, but don't miss it. :thumbs

For covering ports, I like to use Frog Brand painters tape. It's super sticky, but easy to remove. I would not stuff paper rags in ports or think it would keep debris from those turbo tubes. Use extreme care, please. :stop

Attachments
1990 b2k engine red emblem.png
nos tpi kit.jpg
nos tpi kit.jpg (40.64 KiB) Viewed 255 times
*89x2*
Posts: 421
Joined: Tue Oct 21, 2008 9:58 pm

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by *89x2* »

Additionally, I was in my shop and want to share with you some additional parts which WILL come in handy during your restoration. Injector Clips and O-Rings.

BWD # 274773 = O Ring Kit for the TPI Rails

Sorensen #800-9417 = Fuel Injector Retention Clips (they may stretch or snap while removing them during injector swap)
Attachments
IMG_8385.jpeg
IMG_8384.jpeg
IMG_8383.jpeg
*89x2*
Posts: 421
Joined: Tue Oct 21, 2008 9:58 pm

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by *89x2* »

Thanks for the mention of the Callaway Owners Group in your clip :hi

In the one post I made above, you can get the o-ring kit from AutoZone to take care of all the ones needed on the fuel rail :thumbs

The stock injectors were 22 lbs and for 1989-1991, were Rochester Products with the numbers: 1209 5235435 on the top of the body of each

Ford SVO Branded injectors were a popular mod, but that's not what you have.

Your injectors are, as you say, from a Daewoo, which was a car manufacturer owned by GM. Anyways, Rochester Products was another GM subsidiary, and that's why the fuel system was full of their parts in the 80s/90s.

I'd be VERY curious still what each injector ohm reading might be. You can bench test still. :hi


Attachments
L98inj2.jpeg
L98 Inj1.jpeg
RP L98 Injector.png
User avatar
Jeroenvgfn
Posts: 1848
Joined: Thu Aug 28, 2008 2:17 am
Location: Netherlands, Europe
Contact:

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by Jeroenvgfn »

Thanks for sharing, love the videos
Callaway Owners Group : Division Europe
Callaway C1 project registry member
*89x2*
Posts: 421
Joined: Tue Oct 21, 2008 9:58 pm

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by *89x2* »

Good score on the oil primer, and thank you again for the mention of www.CallawayOwnersGroup.com in your videos :beer







On the "aluminum spray", that's nice, but aluminum is very easily cleaned in a hot tank for most parts. A good machinist or machine shop can help with this, and it's relatively inexpensive. The problem with painting aluminum is that you are just covering dirt/debris, and the "paint" will flake off eventually, regardless of what kind. Spend the time, do it right :thumb1

Speaking of aluminum, you will find several anodized (Blue) parts on your car. Be careful with those, preserving their finish. The AC Compressor manifold is one, you will see a pulley, some turbo-related fittings, and other stuff, as well. :hi

On the scope, looks like the cylinder heads (casting 10088113) are the 1988-1990 Corvette castings. Once you get the valve covers off, check the rocker arms, they look like they are full roller rocker arms :cool
Attachments
1990 cyl head scope.png
BluePartsFromCallaway.png
*89x2*
Posts: 421
Joined: Tue Oct 21, 2008 9:58 pm

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by *89x2* »

Keep up the good work! And than you for the continued mention of www.CallawayOwnersGroup.com :hi










If you have not gotten your discount from FIC, here's the current one:
Attachments
fic october code.png
*89x2*
Posts: 421
Joined: Tue Oct 21, 2008 9:58 pm

Re: My Corvette Life: 1990 Callaway Twin Turbo Project

Post by *89x2* »

Keep dropping new clips. Here's the latest two:






The triangular black (rusted) pan is a sump for the oil system. The turbos are also water cooled, but you'll find those lines when you remove the banjo fittings off the turbos.

Original catalytic convertors are gone. Those bullet cats might be loaded inside, or not. Will be interesting to see. The 88L-91 cars had two AC cats with a straight pipe in the center, then to a factory Y pipe with the factory sport mufflers and Callaway embossed oval tip.

The disconnected harness beside the transmission *might* be the CAGS plug for the 1-4 skip shift. It was frequently disconnected to avoid skip shift function, but generally plugged w/ caps. Yours is hammered, and tough to tell exactly what it is. Let us know once you trace out the wires. :hi

Keep pushing on, as you're right, this is a great car to save.
Post Reply