qws

First no question is ever dumb. I've asked a lot of the years. You will need a die grinder of sort. Electric or Air. Actually just found a kit at sears. Somthing similiar will work
sears.com/shc/s/p_10153_12605_00919025000P?keyword=die+g rinder+bits
My bad, I didn't even see that. Matter of fact how do you like it? thinking of removing my test pipe and going true dual
Honestly, SAVE YOUR MONEY. no need for a larger tb.

kangi

As far as porting the intake goes, you need to take material from the whole runner not just port match the flange area. There are long porting bits available for your die grinder so you can get deep into the intake. Do some searches and you'll find some pics.

I also just installed one of the dual exhaust setups form Corvett Central, fits pretty good, can't wait to hear the pipes

I wouldn't worry about boring out the TB's just yet.

Most of all have fun getting to know your car

rodj

http://www.technovelocity.com/chevyh...rt_polish.html
http://www.digitalcorvettes.com/foru...&highlight=SY1
http://users.swko.net/~lionsden/crossfire.htm

Tom400CFI

Don't listen to James...he DOESN'T know what he is talking about.

Tom400CFI

MAN! This thread is a disaster.
Hugh, the problem w/the responses is that MOST of them come from people who have never owned a CFI car. They are simply bad mouthing something which they know little to nothing about.

"You can't get 300 hp our of a Crossfire!"
"Sell it and buy and LT1!"
"Cam heads intake (/ditch the Crossfire)/$5000 and you can have 300 hp!"

What a bunch of f'n BS!!I GOT, 300 hp out of my CFI Trans Am for ~$1500.00...and that was more than I needed to spend. One if the nicest things about the CFI is that you can actually make huge improvements for nearly no money! For less than $1000, you can get very close to, or reach your HP goals:
Cam & Lifter kit: $100
Gaskets: $50
1.6 Roller Rockers: $150
Ported intake: Labor
Modified/removed "Swirl Plates": Labor
Injectors: $200
VRFPR: $40
Exhaust: $100-as much as you want to spend

^This is for all NEW parts. OF course you can buy used and do it even more economically. The cornerstone of power from a CFI is tuning it, and porting the intake. And not just "gasket matching" like most people do at the head end..but porting the WHOLE runner. Till the walls, ceiling and floors are paper thin. Then it's litereally a matter if dialing it in, to match your changes. Keep the cam mild (210*range) and you won't NEED to change the ECM or ECM tuning.

I know...becuase I have actually DONE this stuff. I'm sorry this forum has made such a mess of your reasonable question.

Good advice has been given in this thread so far by:
Frazzlefrak
qws
Kangi
...all people who own and have modded a CFI car.

The Green Rocket

Tom, it sounds like you got great results from your CFI TransAm - can you share some more info on what you did to get into the 12's with your CFI Corvette? Did you go to a 400 engine? (just guessing from "Tom400CFI")

Thomas

HughG

Well, with all the info I got I am more scared than confused to do this now. I'm obviously old school having worked mainly with 70s cars (the 78 Vette was a breeze to work on), even my 84 Trans Am was easy to eliminate the computer and do what I wanted. I kind of wanted to keep the crossfire intact, mainly just to irritate people. I have yet to run into a person on the street that has anything good to say about the crossfire, even though none of them have ever owned one... man, it is amazing how something can get such a bad rap just by word of mouth.

Since summer is almost here I am taking what money I have to clean up the outside of the car and just cruise for the summer and plan a rebuild when winter hits. By then I should have another daily driver and will be able to park this for a couple months.

So, thanks for everyone's advice. I may still port the intake, but beyond that I will probably wait to do a major overhaul.

qws

Thats very common for all of us that have a CFI. And Tom is absolutely right in his comments. The big reason why you hear things like that is because those people don't understand the CFI, so you get to hear the comments "those are junk" "worst corvette ever made" ( But the 82 gets a better wrap!... go figure!

Its not rocket science to understand it. They are very simple and easy to understand when you have the right people teaching you such as CFI-EFI, Tom400CFI, and the list goes on. There's also a ton of information on the crossfire forum.

I knew NOTHING about engines until I got my 84. That has taught me a ton about engines. Even with my HSR conversion I still have less than 5K in mods done to my engine.
Xram-$450
1.6 rr's &185
Heads $625
Cam- $140
2"TB and injectors $450
HSR- FREE (intake and fuel rails)
Air filter- $30.00
Injectors $100
52mm TB-$100
Misc, Distributor, wiring,regulator fuel line,sensors $400
EBL- $400
So whats that $2800 or so? (didn't use a calc so don't bust me..lol)

My labor, a lot of help from the members of the forum,beer and a ton of fun doing it!!

Bottem line is learn about it before doing mods, set your goals, learn and most important just have fun with it!

jhammons01

dude, just leave the thread already.

The '84 is what the OP has...the '84 is what the OP wants.....The '84 is what the OP is going to work on.

Why do you stop at an LT1?? Why not just tell everyone that wants to mod a C4 to go all the way and buy a Z06??

I mean really....using your logic only a 2010 Z06 will do...

bnio

Good luck with your build. I will be very surprised if you don't reach your power goal. The intake system should support the airflow you want. The only thing I want to comment on is the potential ecm choice if you decide to change ecm's for tuning. I noticed earlier someone commented on a 1227747 ecm for a swap. I would suggest not to use that particular ecm and use the 16197427 instead. It came off mid 90's tbi trucks. There are other variations of this ecm that goes by different part numbers so there should be plenty out there at a reasonable price. The reason I suggest the 427 ecm is because the data bus is 8192 baud rather than the 7747 which is a 160 baud. Also the 427 is considered a pcm since you can control the newer automatics with it if that matters. The code is also more refined than the 7747 code with better fueling algorithms. You will need to have hardware for tuning/burning chips and a program like Tunerpro for editing. You should also shoot on over to thirdgen.org and check out the diy-prom chip forum. Many guys over there playing with tbi stuff. There are also many different modified bins over there also like the $0D code for the 427 ecm for example. You can run this is in maf or map mode depending on what you want, maf mode using the newer frequency mafs from lt1, vortec trucks, and the newer ls series mafs. If you decide to go with a 7747 there is an add on card to mod the 7747 for realtime programming support communications speed increase and many other features. It is sometimes referred to the EBL card here is the link http://www.dynamicefi.com/ . Anyway just wanted to throw out some efi tid bits for you in case you haven't searched this aspect yet.

Good luck

bnio

I was just looking at the EBL / dynamicefi.com site and it will communicate with your digital dash if you decided to use. Due to that if it were me I would choose it since it is a pretty nice piece. Anyway if you haven't checked it out already go take a look.

qws

You lost me a little bit with your explanation of the EBL/Flash. I use it in my 84 for tuning. Its can't be used for "realtime". In order to get any of the ecms to connect to harness of the 84 you either have to 1) make your own harness or 2) Get it Ham'd. I went with number 2 since I don't want splices under my dash.
With all my research i did prior to uprgrading ecm's I went to the EBL/Flash for many reasons. IMO its the best way to get everything out of a tune. Datalogging is easy using the WUD display, allows VE learns, NO chips. All tuning is done in tunerpro. There's a few guys here that use it besides me. Its does make tuning easy for people like me that know very little about how to do it. EBL also offers the multi port upgrade now and thats how I drive my HSR. What really neat about the multi-port upgrade to the EBL is that when you do go from 2 injectors to the 8 injectors you don't have to run any wires at all. You use the orginal harness already there. And it makes for a nice neat job in the end.
from this

to this

Tom400CFI

I did have good results from my TA (which was a 400CID, CFI-fed engine). I should have never sold that car.

The 12's weren't from a CFI 'Vette. My current 'Vette is a '92, but I HAD an '06 C6, and that is what I ran 12's in. I did the goofy little "12 sec club" thing b/c getting in the 12's w/a bone stock C6 is a big deal...where I live. So I was and am pretty proud of that driving. Most C6's where I live, run 14.0x's in the low 100's. I've seen one C6, run a 13.9x@~105. I went 12.89@111.

I never wend 12's with CFI induction, but my combo was FAR from ideal. Cheap, reliable, and pretty fast (low 13's), but a "good combo", it was not.

dmueller1984

I have the Renegade, 1.6 rollers and exhaust. Wondering what cam and heads are best. Thinking of Trick flow heads and one of these cams. Crane 114132, 114122. Power max 2040. Compcam 12-235-2. Which is best? Buccaneer, any place to still get a ham.board for the EBL flash? Hate to cut wires. Grumpy has A LOT of info.

BrandensBeast

You might want to make your own thread asking, this is a 6 year old thread Goodluck.

dmueller1984

Thank you! I thought I was replying to a new post, but it had a different title. "My 1984 Crossfire Build". Since replied again to the right one this time.

Joe C

Gibbles

meh for me 84 = vintage. That = me not having to baby sit my car while some guy with an IQ of 50 tries to jack up my car wrong and does other weird things for the yearly inspection.
That's worth a good 10k easy

dmueller1984

Also, for me it is a hobby that keeps me out of trouble and my wife happy.

Gibbles

I would say that also, however the amount of money I keep shelling out with a big smile on my face...