1984 Corvette crossfire injection help?


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1. Clarify what is possible
2. Give "Newb's" some "hope"
When I got my CFI car ('83 Trans Am), I didn't know what CFI was except a "rare" injection system. I didn't know how it worked, or what was under that flat plenum lid. When I learned from others what a P.O.S. it was, I have to say I was pretty bummed. That "information" held me back...for a while. I contemplated porting, and removing swirl plates, but nay-sayers told me that would only kill low end torque. So I didn't...for a loooong time, and that was too bad for me. I finally quit listending to "nay-sayers" and went my own way, doing what I thought made sense to me.
After the fact, I'm proud that I got a 305 CFI to run 14.5 with FP adjustments, timing, stat, fan and exhaust. Similar to "CFI-EFI", I've never seen ANY 305 CFI run that fast, with ANY mods. Does that mean that I'm "misleading" or "bragging"? I don't thinks so. I hope that I'm encouraging. Showing what to shoot for. With less than $1500/00 in mods I was running low 13's. Is that "misleading"? I dont' think so. Again it should help to motivate a new and curious owner. That's how I feel about CFI-EFI's posts and you should to. That you "harsh" on him (or anyone) for his bang/buck improvements is exceptionally lame.
Last edited by Tom400CFI; Dec 13, 2007 at 08:07 PM.
RACE ON!!!
and what does this do for this thread but to proove what an arrogant p---k you are? i have never once in this thread or any other thread for that matter antagonized disagreed or even disputed anything you said and for you to treat me or any other member who hasnt bashed or belittle you is complete
was more meaningfull then your last 10 posts in this thread if you ask me. and for the record im relatively new to corvettes so yes im learning more then im contributing but i never thought that was a crime.
Last edited by scooter18155; Dec 13, 2007 at 10:01 PM.
I am going to do the following: Port my intake and my heads and probrably a performance cam. My exhaust is allready straight and I dont think I can do much with the air intake
Maybe change the injectors and throttlebody
What do you think and if I do all that is it worth it?
I appreciate all opinions
Thanks
I am going to do the following: Port my intake and my heads and probrably a performance cam. My exhaust is allready straight and I dont think I can do much with the air intake
Maybe change the injectors and throttlebody
What do you think and if I do all that is it worth it?
I appreciate all opinions
Thanks
The Best of Corvette for Corvette Enthusiasts
Everything else you have planned sounds great though.
was more meaningfull then your last 10 posts in this thread if you ask me. and for the record im relatively new to corvettes so yes im learning more then im contributing but i never thought that was a crime.That, however didn't prevent you from taking a pot shot. My "last 10 posts in this thread" were answers to accusations. If you don't feel they were "meaningfull"(sic) then fine. There is nothing wrong with lurking and learning, in fact it should be encouraged, but if you never had anything else (not you) to post, there would be little need to post. If you don't get my drift, check some post counts and compare them to worthwhile contributions. Now take a deep breath...
RACE ON!!!
That, however didn't prevent you from taking a pot shot. My "last 10 posts in this thread" were answers to accusations. If you don't feel they were "meaningfull"(sic) then fine. There is nothing wrong with lurking and learning, in fact it should be encouraged, but if you never had anything else (not you) to post, there would be little need to post. If you don't get my drift, check some post counts and compare them to worthwhile contributions. Now take a deep breath...
RACE ON!!!
weather it be mine or someone elses. and how does your answers to accusations as well as some accusations actually contribute to this thread or even help the original poster?
might not exactly be a meaningfull contrabution but the same could be said about some of yours and other posts as well which keeps going on and on and on but hey thats ok
weather it be mine or someone elses.
might not exactly be a meaningfull contrabution but the same could be said about some of yours and other posts as well which keeps going on and on and on but hey thats okRACE ON!!!
It doesn't. But before you place blame for the deviation this thread has taken, go back and read the OPs question and my reactions to it. I was the first to reply. I have tried to do nothing but help. If answering questions about statements I made while helping, and defending myself against accusations made about that help, are what caused the direction this thread has taken, then I have to plead guilty. Do not the questioners or the accusers have any share in the blame? You went off the deep end reacting to a post I made that wasn't even about your post. Am I such a bad guy for reacting, while you are not? At least I read the posts and responded to what was actually written.
Again, your lurk is not what I was commenting on. And while I admit not every word I write is a gem, my helpful and meaningful posts are well documented.
RACE ON!!!
which like i said wasnt any less usefull then some of your posts that you was defending yourself as far as the original thread goes. is it any better for you me or anyone to post a useless thread just because we think we are justified by someone elses rant or comment? reguardless of who you was commenting on i still think it was wrong of you to do that even though he has a low post count. a low post count may be due to a # of reasons niether you nor me may know. and your knowlege or helfullness to others isnt in ? here i have seen you post and help others a great # of times. it just seems when someone posts something you dont agree with you have some smart *** remark which is often taken as mean or degrading even though i dont honestly think you intend it to be so it just apears that way.
This post really had no contribution to the subject at hand. just a freepost,thanks for reading and you can't get your click back....sorry
I am going to do the following: Port my intake and my heads and probrably a performance cam. My exhaust is allready straight and I dont think I can do much with the air intake
Maybe change the injectors and throttlebody
What do you think and if I do all that is it worth it?
I appreciate all opinions
Thanks
Ported intake, the ram air mod, new 1985 fuel pump, lowered my temperature to 180 with new thermostat and fan switch, cheap set of 1.6 roller tip rockers (with new valve springs and seals while I was there). I also bumped my timing up to 10 degrees initial (34 degrees full advance.)
I do not race my Corvette, but each modification seemed to help. All together, for less than $300, I feel a drastic difference in throttle response and acceleration. I stopped short of modifying the swirl plates, as I did not see any potential for more HP there at the time, but I may play with them a little bit next time I have it apart. Replacing the tired OE fuel pump with the new one for a 1985 brought my fuel pressure up to 13.5 pounds. I think 14psi would be ideal, but haven't gotten around to taking the regulator apart yet to adjust the pressure. Porting the intake is easy to do, as long as you are patient and have the proper tools to do the porting. I suggest looking for a used manifold to work on, so you don't have any down time.
A new cam and heads sounds like a good idea, but IMO you may as well pull the engine and at least freshen it up some if you are going to rip into it that deep. I'm not sure if you posted how many miles are on your crossfire, but from experience adding significant HP to a tired engine could =
.Just my 2 cents. Have fun with it!











