beags86
Eastbound and Down
I Understand. But I still think it would be cool for a g body or maybe an 80s c10 that was just a cruiser or something of that nature.
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
To run a Carb or not?
- Thread starter TJ1978
- Start date
I Understand. But I still think it would be cool for a g body or maybe an 80s c10 that was just a cruiser or something of that nature.
So adding the welded O2, other than that my lists is what is needed to get this done?
beags86
Eastbound and Down
If you don't want to weld it. you can drill a hole, and I can't remember who but somebody sells a clamp-on kit that puts the bung on the outside but the O2 sensor still protrudes through the hole that you drilled. personally not the way that I would do it. but if you don't want to have it welded, or if you can't weld it yourself it might be an easy solution for you.
Otherwise to answer your question. yes.
for our intank fuel pumps we need a relay as the pro flo 4 system switches grounds like newer vehicles do now .
so to feed the fuel pump the real is needed and you will wire it hot and use the output ground to switch the relay on/off .
ignition coil from the aprroved list .
fuel pressure regulator for the 43 or 53 psi your system will be running from edelbrock .
8041 bracket for throttle and kickdown/tv cable mounting . super quality kit fits great .
most i can recall at this point .
so to feed the fuel pump the real is needed and you will wire it hot and use the output ground to switch the relay on/off .
ignition coil from the aprroved list .
fuel pressure regulator for the 43 or 53 psi your system will be running from edelbrock .
8041 bracket for throttle and kickdown/tv cable mounting . super quality kit fits great .
most i can recall at this point .
If at all possible I would weld the O2 bung in, if it leaks it will throw your fueling way off because it will see the extra oxygen and think it's lean.
Found this article from Hot Rod in 2008 about putting a Pro-Flo XT on a Nova. It says this install went from 10.5mpg with a carb to 16.75 with the EFI. https://www.hotrod.com/articles/hrdp-0811-edelbrock-pro-flo-xt-efi-install/
Probably not a realistic result for a square body brick with wheels, but still interesting. Also didn't know the Pro-Flo had been around that long. Price has come down a lot too.
Probably not a realistic result for a square body brick with wheels, but still interesting. Also didn't know the Pro-Flo had been around that long. Price has come down a lot too.
beags86
Eastbound and Down
Pro flow has been around since at Least 05..... That was the first time I seen it on a gmt400.....
1979 was the first system . and in 1992 the updated unit was introduced and called pro flow 1 .
and that before holley had aftermarket efi offered to the masses .
and that before holley had aftermarket efi offered to the masses .
I was thinking the Pro-Flo XT would be cool but why the hell is the throttle linkage on the RIGHT side of the thottle body. Seems damn complicated to connect a throttle cable and trans kick down.
no different than ls stuff and even vortec engines were a bit different . and fyi throttle cable from a 96-00 gmt400 with vortec is LOOOOOONG and still clips in the fire wall the same and hooks up the same . lots of guys have used them over the years for a swap .
I get there are solutions, I just don't understand why it was done in the first place. Don't think the Pro-Flo is going to be replace LS applications.
That is good info on the GMT400 cable. TH350 kickdown cable is the other quandary.
My guess is that they can use the same TPS as GM. So why did GM do it like that? I have no clue. Was is because of something hidden which could only be discovered in testing?
So how much cam is too much for a factory TBI? I am asking because I have a nice 454 to put in my K5 (zero miles) but it was built to be a carb motor. Carb is not an option for me. The 454 has an edelbrock performer cam with the performer 2 intake. I don't mind swapping the intake or running an adapter but I would like to not pull out the cam on a new rebuild.
Motor swap starting over here:https://ck5.com/forums/threads/200-k5.340114/#post-4078440
I am surfing the site looking for info on TBI with an older motor with a bit of cam.
Was that a pain or just order up a chip? I don't really want to get into a tuning nightmare.
The performer cam is really a pretty mild cam but it worries me with the TBI.
x2 on troy at howell . i talked with him for close to 30 min in the last yearish and he is a tbi guru with all the jobs he has tunned chips for . he has records of them all to pull his info from .
I'm losing patience with all my efi. As we speak my L18 8.1L is broke down on the side of the road about 1/2 mile from my house. I walked home to get my stock daily bc I have to get to work. It has developed over fuelie issues(popping) at idle and wot.
Long story short just a lot of variables that still need going over. Fuel pumps, return lines, voltage sources etc etc etc.
The fitech on my 1970 sbc on the other hand runs but doesn't get good fuel mileage and requires a lot more tuning than I'm interested in doing.
After all I went with fuel injection to avoid all the tuning bs. Here I am with two projects that I'm not happy with bc I've added more technology than they came with.
Not to mention thousands of dollars.
I can fine tune carbs. Efi is over complicated. Jokes on me I guess.
Long story short just a lot of variables that still need going over. Fuel pumps, return lines, voltage sources etc etc etc.
The fitech on my 1970 sbc on the other hand runs but doesn't get good fuel mileage and requires a lot more tuning than I'm interested in doing.
After all I went with fuel injection to avoid all the tuning bs. Here I am with two projects that I'm not happy with bc I've added more technology than they came with.
Not to mention thousands of dollars.
I can fine tune carbs. Efi is over complicated. Jokes on me I guess.
If you stick with low-tech GM injection, another option for a chip is Ryan at Sinister performance in Indiana. Much less drama than TBI chips.com and the first one he sent was on point with no issues. He also does a bunch of diesel stuff, and really knows the older tpi/tbi systems. Can't argue with you about the carbs, though. I've not had any issues with my GM tbi and some engine upgrades, but the performance isn't what you will get from the aftermarket injections. But performance isn't worth anything without the reliability.
Dad put a 454 in his truck with an "RV" cam (can't recall the specifics, was supposed to be mild, it was), headers, and an Edelbrock Performer manifold.
Fueling was significantly off. The stock fuel pump wasn't up to the task. Even doing full blown tuning, it came down to the pump just not putting out enough fuel. I'd be tempted, if I had nothing to lose but a few bucks, to put one of the EP381(? Vortec) pumps in a similar engine, and an adjustable FPR, and just bump the pressure up a tiny bit. It's not the right way, and not going to give you an idea if you are on the right track or not, but it's generally the right approach. More air needs more fuel. How much is the question.
You could also go to the wrecking yard, and if you can find an '87-95 truck, play around with the fuel pressure regulator, and see how to modify it yourself to attempt to bump pressure up a bit. TBI gasket kits used to be fairly cheap on ebay.
If you have one close, you can go to autozone and borrow their fuel pressure test kit. Use that to see if you are able to increase the fuel pressure with the stock pump, and/or if you decide to go with the higher pressure pump.
My Blazer is a '90 so it already has TBI, it should have enough fuel pump but I am going to check that both motors used the same pump. I have the correct 454 throttle body so that should help with fuel also. I also have the 454 ECU so that is covered but I bet I end up with a new PROM chip from Howell. I have a fuel pressure tester, I will get a base number from the 350 before I take anything apart. If all the '87-'95 trucks have the adjustable regulator then I should already have one.
