Help from the C3 Vette Gods..
Thread Starter
Cruising
Joined: Mar 2006
Posts: 10
Likes: 0
Help from the C3 Vette Gods..
Hi guys. I've watched for a while but have been kind of shy of showing my ignorance here. Well, here goes.
Got an 80 vette that I'm sticking the GM ZZ383 crate engine into. I'm going to use the ProFlow EFI system for induction so that means I have to upgrade the fuel system from carb'd f/p to EFI f/p.
I don't want the hum noise from an inline electric pump so my goal at this point would be to source a fuel tank from some later year vette that used an in tank fuel pump module. Obviously, the tank will need to fit up where the other tank is so that is a consideration.
This engine will be around 500hp once its all said and done. I know the stock pump from a stock vette production year that had an in tank pump will no where be enough to flow for that much hp so I'm wondering if you guys could kindly guide me with what year tank to use, a pump that would fit as a module but yet provide for the hp I'm wanting to run, etc.
I'm sure this isn't new when talking about projects so my hope is that, within moments of this posting, I'll get a response that will solve all my problems and possible provide me with the numbers to the next mega-millions lottery win.
Thanks guys!
Kurt
Got an 80 vette that I'm sticking the GM ZZ383 crate engine into. I'm going to use the ProFlow EFI system for induction so that means I have to upgrade the fuel system from carb'd f/p to EFI f/p.
I don't want the hum noise from an inline electric pump so my goal at this point would be to source a fuel tank from some later year vette that used an in tank fuel pump module. Obviously, the tank will need to fit up where the other tank is so that is a consideration.
This engine will be around 500hp once its all said and done. I know the stock pump from a stock vette production year that had an in tank pump will no where be enough to flow for that much hp so I'm wondering if you guys could kindly guide me with what year tank to use, a pump that would fit as a module but yet provide for the hp I'm wanting to run, etc.
I'm sure this isn't new when talking about projects so my hope is that, within moments of this posting, I'll get a response that will solve all my problems and possible provide me with the numbers to the next mega-millions lottery win.
Thanks guys!
Kurt
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Kurt,
I just upgraded my 383 to a Mass Flo fueil injection. I am running right around 500 HP also. I am using a Walbro extrenal pump. It is very quiet. I cannot here it over the exhaust. If I just run the pump you can slightly here it but once the car is running I cannot. Here is my setup. Nothing wrong with an in tank pump but this is an option.
I just upgraded my 383 to a Mass Flo fueil injection. I am running right around 500 HP also. I am using a Walbro extrenal pump. It is very quiet. I cannot here it over the exhaust. If I just run the pump you can slightly here it but once the car is running I cannot. Here is my setup. Nothing wrong with an in tank pump but this is an option.
Thread Starter
Cruising
Joined: Mar 2006
Posts: 10
Likes: 0
Gordon,
Thanks so much for taking the time to post that up. The goal was to have as quiet an exhaust I could get but not choke up too much of the hp. I take it your exhaust is mild when you say you can't hear the pump over the exhaust system or is your exhaust aggressive?
Also, I believe my year came stock with an aluminum driveshaft. Did you upgrade your driveshaft when you built yours up or did you you leave it stock?
Thanks again!
Kurt
Thanks so much for taking the time to post that up. The goal was to have as quiet an exhaust I could get but not choke up too much of the hp. I take it your exhaust is mild when you say you can't hear the pump over the exhaust system or is your exhaust aggressive?
Also, I believe my year came stock with an aluminum driveshaft. Did you upgrade your driveshaft when you built yours up or did you you leave it stock?
Thanks again!
Kurt
Melting Slicks
Joined: Nov 2001
Posts: 2,659
Likes: 7
From: Katy (Houston) TX
CI 7-8 Veteran
Kurt,
I wouldn't worry about your driveshaft. It's your stub axles, u-joints, half shafts, and rear-end that'll break long before your driveshaft.
Also, there are in-tank pumps you can use Aeromotive has one (A1000 or something like that) that can be mounted in the tank. Trying to find another tank that already has everything in the right spot might be very difficult and you'll probably find that just modifying your existing tank might be the easiest route. More useful would probably be to ask around which pumps are quiet. 500hp isn't a very large hurdle for most electric pumps. Heck, a stock mechanical pump will handle 500hp easily. There's also the RacePumps to look at which is a mechanical pump that can supply an EFI setup.
I wouldn't worry about your driveshaft. It's your stub axles, u-joints, half shafts, and rear-end that'll break long before your driveshaft.
Also, there are in-tank pumps you can use Aeromotive has one (A1000 or something like that) that can be mounted in the tank. Trying to find another tank that already has everything in the right spot might be very difficult and you'll probably find that just modifying your existing tank might be the easiest route. More useful would probably be to ask around which pumps are quiet. 500hp isn't a very large hurdle for most electric pumps. Heck, a stock mechanical pump will handle 500hp easily. There's also the RacePumps to look at which is a mechanical pump that can supply an EFI setup.
Melting Slicks
Joined: Aug 2004
Posts: 2,063
Likes: 1
From: Beverly Massachusetts
This topic was just brought up this past week. i have the edelbrock Pro-Flo EFI setup on my car and i am running a stainless steel tank with an internal Fuel pump installed from Rock Valley tanks. i posted a link below with the recent topic and there is a link to my old tank install and in that thread is a link to Rock Valley. i called them up and they made my tank and it fits perfect. Also if you live in a state that requires your car to be smogged it will fail with the Edelbrock setup because it isnt smog legal.
http://forums.corvetteforum.com/c3-t...p-options.html
http://forums.corvetteforum.com/c3-t...p-options.html
Thread Starter
Cruising
Joined: Mar 2006
Posts: 10
Likes: 0
You two guys are awesome! Thanks for all the help. I'll post up pics and results when I don't think I"ll get laughed out of here. 
j/k
Seriously though, I'm going to tap you two specifically for info if you don't mind when it comes time to tune it.
Thanks again fella's. Enjoy your weekends.
Kurt
j/kSeriously though, I'm going to tap you two specifically for info if you don't mind when it comes time to tune it.
Thanks again fella's. Enjoy your weekends.
Kurt
Thread Starter
Cruising
Joined: Mar 2006
Posts: 10
Likes: 0
Ooops, I don't mean to seem ungrateful. I noticed I said 'you two guys' when in actuality, three helped.
So, thanks to all (I should have said).
I definitely appreciate the guidance about the driveline. I'll make sure to redirect my concerns there. Thanks again!
Kurt
So, thanks to all (I should have said).
I definitely appreciate the guidance about the driveline. I'll make sure to redirect my concerns there. Thanks again!
Kurt
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Yes my driveline from motor to wheels has been modified. Not to radical but it is better than stock. Solid ujoints are a must. I upgraded my half shafts to 3 inch units and my driveshaft is the one from Keisler. I did this when I put in the 5 speed. If you don't run slicks or sticky tires you should be OK. HP is not what breaks parts it is traction. I have seen 400 HP Vettes blow the driveline apart on slicks.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Pro
Joined: Mar 2008
Posts: 716
Likes: 1
From: Albuquerque New Mexico
I'm just curious what else you're doing to that ZZ383 to punch it from 430hp to 500hp? I'm doubtful the fuel injection is going to net any additional max hp so interested to know what mods you're doing to accomplish that - nitrous?
Thanks,
Thanks,
Thread Starter
Cruising
Joined: Mar 2006
Posts: 10
Likes: 0
Sorry for the late replies. I get rather busy from time to time so my responses tend to be days later.
Gordon,
Even though I know the emissions will be worlds better than carbureted setups, the state yearly emission check is a concern of mine. I don't know what state you hail from but did you have any issues running this setup with the PROflow and negating the EGR system?
Texas does a visual check but the other portion of the test is safety checks only (wipers, brake light operation, etc.). Silly, because it doesn't matter if the EGR is working or not...it just has to be there.
I don't mind trying to hunt someone down and throw a c-bill at them to give me a sticker, but I'd like to incorporate everything that I need to to be in order to be 'legal'.
Since you've done this, what did you end up doing in this regard or because your state doesn't care one way or the other, did you just worry over it?
Willlee,
I'm going to list a full build list after I'm done if you're interested. I'll make sure to post it up here once I'm done. 500hp would be impossible with 'just' the setup I've noted so far. Also, my goal is 'around 500hp' so anything just shy of that, I'm going to be stoked about.
Gordon,
Even though I know the emissions will be worlds better than carbureted setups, the state yearly emission check is a concern of mine. I don't know what state you hail from but did you have any issues running this setup with the PROflow and negating the EGR system?
Texas does a visual check but the other portion of the test is safety checks only (wipers, brake light operation, etc.). Silly, because it doesn't matter if the EGR is working or not...it just has to be there.
I don't mind trying to hunt someone down and throw a c-bill at them to give me a sticker, but I'd like to incorporate everything that I need to to be in order to be 'legal'.
Since you've done this, what did you end up doing in this regard or because your state doesn't care one way or the other, did you just worry over it?
Willlee,
I'm going to list a full build list after I'm done if you're interested. I'll make sure to post it up here once I'm done. 500hp would be impossible with 'just' the setup I've noted so far. Also, my goal is 'around 500hp' so anything just shy of that, I'm going to be stoked about.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
My car is a 72 so it would not be an issue. I also have Historic plates on my car so it is not subject to yearly inspections so I have no worries about that. So I can't be of any help in this department. 
Thread Starter
Cruising
Joined: Mar 2006
Posts: 10
Likes: 0
Gordon,
You installed the 700r4 correct?
What challenges did you meet with in regard to linkages, etc. ?
Did you end up going with a better gear in the diff then since you have overdrive?
If its not too much trouble, do you have a link to your build that I coudl peruse over?
Thanks!
Kurt
You installed the 700r4 correct?
What challenges did you meet with in regard to linkages, etc. ?
Did you end up going with a better gear in the diff then since you have overdrive?
If its not too much trouble, do you have a link to your build that I coudl peruse over?
Thanks!
Kurt
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
You might be able to go with an 82 year tank and sending unit as this was an in the tank set-up OEM.
The upgrade from the original 82 CFI pump has been to go with either a TPI pump (85-91), which may not support your horsepower goals, or an LT1/LT4 (92-96) pump which may bre able to support the goals your looking for. You might need to go with a larger feed tubing inside diameter. these pumps "bolt in" to the existing 82 sending unit set-up.
I would post this same question on the C4 Tech section to see what they would recommend.
The upgrade from the original 82 CFI pump has been to go with either a TPI pump (85-91), which may not support your horsepower goals, or an LT1/LT4 (92-96) pump which may bre able to support the goals your looking for. You might need to go with a larger feed tubing inside diameter. these pumps "bolt in" to the existing 82 sending unit set-up.
I would post this same question on the C4 Tech section to see what they would recommend.