Installing Melrose Headers on 1984 Corvette
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
The good thing about the timex based ecm in the 84s is that they're pretty forgiving as far as mods. Hot cam like specs and decent heads can for the most part be compensated for by fuel pressure. It won't be perfect but it will run fine. That's about the edge though. Basically as long as you keep enough fuel pressure and vacuum for the map to read right and the ecm to be able to adjust the BLM and INTs to the middle ish area it should be fine. Not ideal but it will be better off than an equivalent TPI with the same mods. I've seen it done myself.
Or if you want to go crazy there is the EBL flash route then your options are endless. If you're planning on building it, you gotta pay to play as it isn't cheap to do right.
Or if you want to go crazy there is the EBL flash route then your options are endless. If you're planning on building it, you gotta pay to play as it isn't cheap to do right.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 179
Likes: 12
From: Missouri
@84 4+3 I saw that before in another forum and I'll definitely keep it in mind. Maybe I'll get lucky and get a good one on the first order.
@aklim The only other performance mods I want before I go to college next fall are an intake and chip. I know the Renegade intake has had its own set of problems, but I think with enough research I'll know what I'm getting myself into. You mention suspension mods and I know the 84 has great handling. What suspension mods could I do that wouldn't break the bank but would actually make a difference? The car is a Z51 and I just replaced the shocks with the Z51 specific Bilsteins this past August if that makes a difference.
@aklim The only other performance mods I want before I go to college next fall are an intake and chip. I know the Renegade intake has had its own set of problems, but I think with enough research I'll know what I'm getting myself into. You mention suspension mods and I know the 84 has great handling. What suspension mods could I do that wouldn't break the bank but would actually make a difference? The car is a Z51 and I just replaced the shocks with the Z51 specific Bilsteins this past August if that makes a difference.
Le Mans Master
Joined: Aug 2017
Posts: 6,942
Likes: 1,490
From: New Jersey
Nothing done right will be cheap AND easy. He does say he wants it to cut curves and sound good so maybe money and time will be better spent on suspension mods and a loud exhaust instead of having to buy the parts and jiggle around with the fuel pressure to keep it running somewhat ok?
@84 4+3 I saw that before in another forum and I'll definitely keep it in mind. Maybe I'll get lucky and get a good one on the first order.
@aklim The only other performance mods I want before I go to college next fall are an intake and chip. I know the Renegade intake has had its own set of problems, but I think with enough research I'll know what I'm getting myself into. You mention suspension mods and I know the 84 has great handling. What suspension mods could I do that wouldn't break the bank but would actually make a difference? The car is a Z51 and I just replaced the shocks with the Z51 specific Bilsteins this past August if that makes a difference.
@aklim The only other performance mods I want before I go to college next fall are an intake and chip. I know the Renegade intake has had its own set of problems, but I think with enough research I'll know what I'm getting myself into. You mention suspension mods and I know the 84 has great handling. What suspension mods could I do that wouldn't break the bank but would actually make a difference? The car is a Z51 and I just replaced the shocks with the Z51 specific Bilsteins this past August if that makes a difference.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
@84 4+3 even the custom tuned ones? I know the ones on Eckler's are garbage but I would be getting one tuned specifically for my application.
Le Mans Master
Joined: Aug 2017
Posts: 6,942
Likes: 1,490
From: New Jersey
If they do I was not aware.
I honestly wasn't aware anyone could do this. The 84 runs some step child hex setup that is different than even 85s. The ecm doesn't have much of any resolution. I was under the impression that the only one available was the one through DCS. Who knows.
@84 4+3 even the custom tuned ones? I know the ones on Eckler's are garbage but I would be getting one tuned specifically for my application.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 179
Likes: 12
From: Missouri
@aklim @84 4+3 I thought there were companies that did mail order tunes if that's what you mean. I'm guessing it could be tuned live on a dyno but idk. I have looked at this one from EM Racing and they say they can tune it for CFI. I've also been recommended to a few other companies that I have yet to check out.
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Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
@aklim @84 4+3 I thought there were companies that did mail order tunes if that's what you mean. I'm guessing it could be tuned live on a dyno but idk. I have looked at this one from EM Racing and they say they can tune it for CFI. I've also been recommended to a few other companies that I have yet to check out.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 179
Likes: 12
From: Missouri
@aklim I know it is and that it may take multiple tries but it would be better than nothing. There are a few CFI specific forums where people tune their own chips and such. I'm not ready to buy one yet so I'll do more research when the time comes. I may not even end up buying one so I'm not too concerned right now.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 179
Likes: 12
From: Missouri
@corvettenorway how do I add more fuel pressure without messing with the ecm? Is there a regulator somewhere that I don't know about?
Le Mans Master
Joined: Aug 2017
Posts: 6,942
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From: New Jersey
@corvettenorway how do I add more fuel pressure without messing with the ecm? Is there a regulator somewhere that I don't know about?
Le Mans Master
Joined: Aug 2017
Posts: 6,942
Likes: 1,490
From: New Jersey
@84 4+3 so just bump it to 14 when I get the Renegade?
https://www.corvetteforum.com/forums...pump-part.html
Burning Brakes
Joined: Feb 2013
Posts: 1,173
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From: norway
https://www.corvetteforum.com/g/picture/9515216 this is mine 
https://www.corvetteforum.com/g/picture/9516587
https://www.corvetteforum.com/g/picture/9516587
Last edited by corvettenorway; Jan 15, 2019 at 04:43 PM.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 179
Likes: 12
From: Missouri
@corvettenorway @84 4+3 Thank you guys for the help. The only problem I'm having now is with my new mini starter which I'm about to make a post on.
Thread Starter
Instructor
Joined: Oct 2017
Posts: 179
Likes: 12
From: Missouri
I don't know if this is allowed or not but I got my header install done. Here's a video on it. All the info in the video is in this thread I believe but there are a few revs at the end.
Le Mans Master
Joined: Aug 2017
Posts: 6,942
Likes: 1,490
From: New Jersey
I don't know if this is allowed or not but I got my header install done. Here's a video on it. All the info in the video is in this thread I believe but there are a few revs at the end. YouTube LInk