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Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Exhaust looks pretty great compared to what I was expecting. That's ~230hp car, right there....WITH the CFI.
Originally Posted by exiled350
Certainly not easier than having it towed to the crusher, but way easier than a full engine swap or figuring out what the previous owner did and undoing it.
Well...that is QUITE a range you've created there. Who said anything about it needing an engine swap? If it needs "an engine", what's that got to do with the induction system? IIWM, I'd put a scan tool on it, look at data stream. If that looked reasonable, I'd get a pump in there, give it some fuel and try firing it up.
Well...that is QUITE a range you've created there. Who said anything about it needing an engine swap? If it needs "an engine", what's that got to do with the induction system? IIWM, I'd put a scan tool on it, look at data stream. If that looked reasonable, I'd get a pump in there, give it some fuel and try firing it up.
Easy Button.
Maybe I got the threads mixed up but I thought I saw somebody say l31 was the answer. I agree there's no harm it trying to start it as it is, but what if it doesn't. OP started they're a highschool student with minimal experience, early fuel injection systems are not a great starting point.
Posted this story here before, but bears repeating in case some other poor soul tries to install something similar (if there's even something like it still on the market):
Way back in the late '80s I installed a very similar (could be the exact same system for all I remember) true dual system on a friend's '82 Z28, to replace his rusted-out factory exhaust. Can't for the life of me recall the manufacturer other than it was one of the large factory system companies like Walker, etc. Anyway, it was a nightmare; a boatload of sloppy slip-fit joints, a million U-clamps, poorly-fitting hangers, all advertised as "bolt-on." It took some welding and other mods to get in all on there.
My friend drove the car for a couple of weeks with the new duals and said it didn't make the car run one iota better than stock, rattled whenever he went over a bump, and dragged on anything that wasn't flat ground. We pulled it all off there, threw it in the trash, and put on a factory replacement system.
From: Franklin, KY near Beech Bend Raceway, Corvette Plant and Museum.
Car: 1992 Pontiac Firebird
Engine: 5.0L L03 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: What in the world
I know this dual exhaust system. I have it sitting in my cart at Summit. Right now it's $254.99 but it jumps around from $209.99 to $234.99 to $254.99. I waiting for the price to drop back down again or a sale or coupon code to pull the trigger. It's going on a low mile 1992 5.0L LB9 long block with a TBI induction system and 93/95 driver side F-body LT1 exhaust manifold and a 1993 passenger side F-body LT1 exhaust manifold. It will retain ALL factory emissions equipment and all factory style exhaust hangers.
My exhaust guy is a life long friend that is pushing 60 and has been bending pipe since he was a teenager. His bender can make these same smooth crinkle free compression bends in up to 2.5" pipe. I'm getting the kit because it's a time saver being very close to what I want with just tweaks needed.
And 4 of these exhaust clamps. They are needed for the two mufflers. There will be testing and trialing before the finished exhaust is done but it won't have a million clamps on it.
It's meant to mate up with a set of 1.625 primary tube shorty 4 into 1 headers that Dynomax no longer makes. There is a provision on the driver side header for an O2 sensor.
The headers on his car aren't these but there were a few other brand headers that would work with this dual exhaust kit or could be easliy adapted to work with it.
Last edited by Airwolfe; Feb 26, 2025 at 02:03 PM.
That's a pretty cool setup. I know the old dual setup were terrible. This one and some of the others out now are pretty cool.
To the OP, If the rest of the car is decent and dent/rust free(ish) and it's just the fuel system/efi your pretty good. Sofa is correct about the joyous th200/350 stuff. At some point you should send pics of the trans/trans pan and torque arm mount. I'm sure the brakes will need something too.
the crossfire engines have slightly higher compression than the base v8 and w some of the knowledge from people on here you can have a decent to good runner potentially. It will also be a great learning process.
I’m going to be 110% honest, I have no idea lol. Another thing maybe yall might be able to give your ten cents on. None of the dash gauges work when I go to start. I’ve seen videos of other birds that show at least them lighting up before the car starts. Is it the wiring behind the gauges that need to be checked out? Also, the fuse for the dash pops when I go to start it. Thanks guys!
You can see in one pic they run above both in the stock place. I'm sure it's tight though.
does the gage fuse pop when it's in the acc position and the run position or when your starting it? Do you have any aftermarket switches/stereo stuff wire in? The cool guy who wired in the fuel pump may have done a really good job wiring it in. You may wanna disconnect the inline fuel pump and see if it still does it. That goes for any things wired in that's not stock. Who knows where power is getting pulled from. And how it is or isn't grounded! You could post pics of the interior if there are any "added" electrical items.
That looks really clean all over. The interior looks great.
I may be wrong but I thought the crossfire only had the th200. This car looks like it has a 4 speed. The shifter has OD and 3,2,1. The th200 only has the 3,2,1. Someone w more knowledge will know better. This car is totally worth fixing. I almost bought a black/white Recaro and I don't remember the seat/door panel material like that. But that was 27 yrs ago!
also, the gauge needles are white, I think only 82s had white needles. In 83-84 they were orange. I may be wrong here also.
looked it up, Daytona had the white needles and the CFI w a th700. You should be pretty good w that trans.
Last edited by Firechicken82; Feb 27, 2025 at 08:45 PM.
That looks really clean all over. The interior looks great.
I may be wrong but I thought the crossfire only had the th200. This car looks like it has a 4 speed. The shifter has OD and 3,2,1. The th200 only has the 3,2,1. Someone w more knowledge will know better.
All '82 V8's had 200 trans. All '83 V8's had 700. CFI included.
My CFI car (an '83) had a 700...for a month of so.
Yeah it honestly is a really good looking car. I wish I had more automotive experience. I am listing it for sale now. If anyone is interested, dm me. I think I’m going to try again with a car that already runs and only needs minimal repairs.
Exhaust looks pretty great compared to what I was expecting. That's ~230hp car, right there....WITH the CFI. 
