1984 Corvette
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
OK, that is just odd as hell. I never heard of that happening on a stock motor. I even drove the 82 that was first used for testing. The 82 used was a daily driver and the owner never mentioned that issue ever, nor did I see that. I can't explain that stumbling or odd dyno graph at WOT. However, 50 hp gain is pretty impressive for a manifold change. We only said a 30hp gain to the rear. As for the completely screwed up Renegade, yes, that is why we PULLED our tooling away from EMS in CA. They screwed everything up on the machining and was a real **** show, really making us look bad back then. All the manifolds with a serial number stamped on them by the EGR on the top flange area is a good manifold. I hand stamped all of them and they were all poured and machined here in Arizona, not Cali.
The only issue that I know of for sure is the odd stumbling with a hard line fuel system, because I had that and figured out what was going on. It is a harmonic issue with the injectors pulsing and the hard lines. GM must have saw this as well with the camaro line and put a damper in-line to stop that from happening. They may have used that on other cars as well, not sure. I just used rubber fuel hose.
The only issue that I know of for sure is the odd stumbling with a hard line fuel system, because I had that and figured out what was going on. It is a harmonic issue with the injectors pulsing and the hard lines. GM must have saw this as well with the camaro line and put a damper in-line to stop that from happening. They may have used that on other cars as well, not sure. I just used rubber fuel hose.
Last edited by Buccaneer; Aug 2, 2024 at 12:43 PM.
Heel & Toe
Joined: Dec 2023
Posts: 15
Likes: 5
I am guessing you are with Xfire-Performance or know someone over there? I reached out to Xfire about four months back. I was trying to get a decent renegade intake before switching to the bored TBI. One of these days I would like to get my hands on the intake from if it ever goes into production. Do you know anyone over there or got a line on a Renegade intake? If nothing else, I want a show piece in my garage.
Le Mans Master
Joined: Aug 2017
Posts: 6,940
Likes: 1,490
From: New Jersey
crossfire renegade intake manifold problem solved! (youtube.com)
Here a one video I can find a few others. I wanted to keep my CFI intake manifold I love the way it looks and works with the cold air intake through the hood. However, I can never find an intake and the lack of QC with the casting makes me wonder if I will even get a good intake.
Corvette L83 Renegade Crossfire Intake (Quality Issues) (youtube.com)
This video is one user's experience with the casting issues.
1984 Corvette Dynoed: Renegade Manifold, 1.6 roller rockers (youtube.com)
This video was impressive about 50hp gain with Renegade and 1.6 rockers. He has some very weird dips in the dyno graph. I am trying to figure out if this is the similar problem the guy had in first video with the fluttering, or another issue like fuel pressure.
Here a one video I can find a few others. I wanted to keep my CFI intake manifold I love the way it looks and works with the cold air intake through the hood. However, I can never find an intake and the lack of QC with the casting makes me wonder if I will even get a good intake.
Corvette L83 Renegade Crossfire Intake (Quality Issues) (youtube.com)
This video is one user's experience with the casting issues.
1984 Corvette Dynoed: Renegade Manifold, 1.6 roller rockers (youtube.com)
This video was impressive about 50hp gain with Renegade and 1.6 rockers. He has some very weird dips in the dyno graph. I am trying to figure out if this is the similar problem the guy had in first video with the fluttering, or another issue like fuel pressure.
The dyno chart on the other one isn't as bad as I remember. Mine looked wild when it was happening, total loss of power at the harmonic band.
And yes, Tom is the guy you want to talk to about the Renegade. I've been poking the bear for a while now lol.
Burning Brakes
Joined: Sep 2017
Posts: 938
Likes: 168
OK, that is just odd as hell. I never heard of that happening on a stock motor. I even drove the 82 that was first used for testing. The 82 used was a daily driver and the owner never mentioned that issue, ever nor did I see that. I can't explain that stumbling or odd dyno graph at WOT. However, 50 hp gain is pretty impressive for a manifold change. We only said a 30hp gain to the rear. As for the completely screwed up Renegade, yes, that is why we PULLED our tooling away from EMS in CA. They screwed everything up on the machining and was a real **** show, really making us look bad back then. All the manifolds with a serial number stamped on them by the EGR on the top flange area is a good manifold. I hand stamped all of them and they were all poured and machined here in Arizona, not Cali.
The only issue that I know of for sure is the odd stumbling with a hard line fuel system, because I had that and figured out what was going on. It is a harmonic issue with the injectors pulsing and the hard lines. GM must have saw this as well with the camaro line and put a damper in-line to stop that from happening. They may have used that on other cars as well, not sure. I just used rubber fuel hose.
The only issue that I know of for sure is the odd stumbling with a hard line fuel system, because I had that and figured out what was going on. It is a harmonic issue with the injectors pulsing and the hard lines. GM must have saw this as well with the camaro line and put a damper in-line to stop that from happening. They may have used that on other cars as well, not sure. I just used rubber fuel hose.
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
Yes, I know people at XFire Performance. 
The EBL issue needs to be fixed for CFI before anything else moves forward. This issue hopefully is just about solved. It seems like nothing EVER moves quickly anymore, just getting people to actually work is a feat all by itself. 
On another note...I did see a slightly used Renegade on eBay recently (within the last two weeks) that went for $1,200. It did not have a serial number on it, so it was an EMS manifold. All bets off if it's a good one at that point.
They do pop up from time to time, keep watching if you want one and GL.
The EBL issue needs to be fixed for CFI before anything else moves forward. This issue hopefully is just about solved. It seems like nothing EVER moves quickly anymore, just getting people to actually work is a feat all by itself. On another note...I did see a slightly used Renegade on eBay recently (within the last two weeks) that went for $1,200. It did not have a serial number on it, so it was an EMS manifold. All bets off if it's a good one at that point. They do pop up from time to time, keep watching if you want one and GL.
Last edited by Buccaneer; Aug 2, 2024 at 12:49 PM.
Heel & Toe
Joined: Dec 2023
Posts: 15
Likes: 5
This video is a good video. The guy is a good wrench and does good work. He did a nice job cleaning up the electrical when he converted from the DCS Renegade manifold to a single TBI. This was the video that took me off my quest to find a Renegade manifold. Which was a bummer, I wanted to pop my hood and show off my Crossfire setup and blow minds.
The guy in the video used a stock TBI truck intake manifold and stock TBI and said the performance was much improved. I plan on putting my TBI setup on the dyno and comparing to the Dyno numbers to the 198hp that the Renegade put to the wheels.
The guy in the video used a stock TBI truck intake manifold and stock TBI and said the performance was much improved. I plan on putting my TBI setup on the dyno and comparing to the Dyno numbers to the 198hp that the Renegade put to the wheels.
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
This video is a good video. The guy is a good wrench and does good work. He did a nice job cleaning up the electrical when he converted from the DCS Renegade manifold to a single TBI. This was the video that took me off my quest to find a Renegade manifold. Which was a bummer, I wanted to pop my hood and show off my Crossfire setup and blow minds.
The guy in the video used a stock TBI truck intake manifold and stock TBI and said the performance was much improved. I plan on putting my TBI setup on the dyno and comparing to the Dyno numbers to the 198hp that the Renegade put to the wheels.
Crossfire to single TBI swap update (youtube.com)
The guy in the video used a stock TBI truck intake manifold and stock TBI and said the performance was much improved. I plan on putting my TBI setup on the dyno and comparing to the Dyno numbers to the 198hp that the Renegade put to the wheels.
Crossfire to single TBI swap update (youtube.com)
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