C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Installing the 421.....

Thread Tools
 
Search this Thread
 
Old Aug 26, 2010 | 02:05 AM
  #141  
LT5 Doc's Avatar
LT5 Doc
Instructor
10 Year Member
 
Joined: Feb 2009
Posts: 142
Likes: 0
Default

Did the 421 fire up yet?
Reply
Old Oct 6, 2010 | 11:14 AM
  #142  
88BlackZ-51's Avatar
88BlackZ-51
Thread Starter
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default

Originally Posted by LT5 Doc
Did the 421 fire up yet?
Not yet Doc. My FAST box has seen more miles on it, then I have driven my car in the last few years being shipped back and forth. I am hoping this time they get it right, and the car will start.

In the meantime I bought this. I think the 421 will like the D44 3.45's instead of the D44 3.07's when the ZF6 goes in.



Reply
Old Oct 6, 2010 | 11:22 AM
  #143  
cv67's Avatar
cv67
Team Owner
15 Year Member
 
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Default

Its down to you and Cunningham, who will be first.....
Reply
Old Oct 6, 2010 | 11:26 AM
  #144  
88BlackZ-51's Avatar
88BlackZ-51
Thread Starter
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default

Originally Posted by cuisinartvette
Its down to you and Cunningham, who will be first.....
I'll win that one. I just need some spark, and vroom!!
Reply
Old Oct 7, 2010 | 11:49 PM
  #145  
LT5 Doc's Avatar
LT5 Doc
Instructor
10 Year Member
 
Joined: Feb 2009
Posts: 142
Likes: 0
Default

Originally Posted by 88BlackZ-51
Not yet Doc. My FAST box has seen more miles on it, then I have driven my car in the last few years being shipped back and forth. I am hoping this time they get it right, and the car will start.

In the meantime I bought this. I think the 421 will like the D44 3.45's instead of the D44 3.07's when the ZF6 goes in.



3.45? Why not 3.93 or 4.11? Let the big dog eat!
Reply
Old Oct 7, 2010 | 11:57 PM
  #146  
dclafleur's Avatar
dclafleur
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2005
Posts: 6,551
Likes: 36
From: Jenks OK
Default

Originally Posted by LT5 Doc
3.45? Why not 3.93 or 4.11? Let the big dog eat!
Shoot, he'll already be traction limited.
Reply
Old Oct 31, 2010 | 02:23 AM
  #147  
Mojave's Avatar
Mojave
Melting Slicks
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Oct 2006
Posts: 2,241
Likes: 10
From: College Station TX
Default

Any updates?
Reply
Old Oct 31, 2010 | 01:57 PM
  #148  
88BlackZ-51's Avatar
88BlackZ-51
Thread Starter
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default

Originally Posted by Mojave
Any updates?



http://forums.corvetteforum.com/c4-p...deband-o2.html


yup. decided that i want a seq. system, so cars in limbo until i sell the above which will give me money to put towards the pricey XFI.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Oct 31, 2010 | 01:57 PM
  #149  
88BlackZ-51's Avatar
88BlackZ-51
Thread Starter
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default

Originally Posted by LT5 Doc
3.45? Why not 3.93 or 4.11? Let the big dog eat!
I doubt it will need a car like that Kurt.
Reply
Old Oct 31, 2010 | 06:51 PM
  #150  
cv67's Avatar
cv67
Team Owner
15 Year Member
 
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Default

Theres no way to tune this thing with a stock ecm? Sure the aftermarket stuff gives better tuning capabilities but in the meantime waiting, with all the hassles your car is just collecting dust.
Reply
Old Oct 31, 2010 | 07:00 PM
  #151  
LD85's Avatar
LD85
Race Director
25 Year Member
 
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Default

Oh well, I hope the new FAST will do the trick

Better hurry up cause buy Spring I hope to sell my 85 and buy a C5 Z06 and throw on a Supercharger,, ... so I can keep up with you
Reply
Old Oct 31, 2010 | 10:17 PM
  #152  
88BlackZ-51's Avatar
88BlackZ-51
Thread Starter
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default

Originally Posted by cuisinartvette
Theres no way to tune this thing with a stock ecm? Sure the aftermarket stuff gives better tuning capabilities but in the meantime waiting, with all the hassles your car is just collecting dust.
Jim did everything under the sun to use the stock ecm. He is a very smart cookie as you know. The stock ecm would be good for wot, but that's the least of my worries.

Dust is ok. I have a 2 year old, and a 31 day old now. I am sure they dont mind. It will get done Ron. The main thing for me is the motor is built, and in the car. Most dont get that far because its alot of money.
Reply
Old Oct 31, 2010 | 10:18 PM
  #153  
88BlackZ-51's Avatar
88BlackZ-51
Thread Starter
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default

Originally Posted by LD85
Oh well, I hope the new FAST will do the trick

Better hurry up cause buy Spring I hope to sell my 85 and buy a C5 Z06 and throw on a Supercharger,, ... so I can keep up with you
You better do more then that to it.
Reply
Old Oct 31, 2010 | 11:25 PM
  #154  
T. Wayne Nelson's Avatar
T. Wayne Nelson
Racer
 
Joined: Sep 2007
Posts: 493
Likes: 0
From: Eden Utah
Default

Originally Posted by 88BlackZ-51
You better do more then that to it.
I was on the dyno this Friday, and there was 2 C6 Z06's there. Both had cams and bigger intakes. One had shaved his heads 30 thouands, the other had a Black Mambo cam. Both cranked 555 RWHP and are daily drivers. I have a 406 gen 1, 700R trans, 195 AFR heads, mini-ram, pretty good cam, gen7 ignition, headers, MSD, and about everything else you can throw on. Made 400 at the rear wheels...old school vs new school. That LS7 motor makes lots of hp and without to much effort, a stock one makes 450 RWHP....
Reply
Old Nov 1, 2010 | 07:55 AM
  #155  
bjankuski's Avatar
bjankuski
Safety Car
20 Year Member
Photogenic
Liked
Top Answer: 1
 
Joined: Sep 2001
Posts: 4,162
Likes: 555
From: Glenbeulah Wi
Default

Originally Posted by 88BlackZ-51
Jim did everything under the sun to use the stock ecm. He is a very smart cookie as you know. The stock ecm would be good for wot, but that's the least of my worries.

Dust is ok. I have a 2 year old, and a 31 day old now. I am sure they dont mind. It will get done Ron. The main thing for me is the motor is built, and in the car. Most dont get that far because its alot of money.
I am positive the stock ECM can control your engine with a custom tune. I have tuned many combinations that are more radical then yours with the stock ECM. You may want to consider that as an option, so you can at least drive the car while you wait for the fast XFI.
Reply
Old Nov 1, 2010 | 01:18 PM
  #156  
88BlackZ-51's Avatar
88BlackZ-51
Thread Starter
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default

Originally Posted by bjankuski
I am positive the stock ECM can control your engine with a custom tune. I have tuned many combinations that are more radical then yours with the stock ECM. You may want to consider that as an option, so you can at least drive the car while you wait for the fast XFI.
My stock harness is butchered up, and I am switching over to MAP. I am just going by what guys who have been threw it before.

I dont doubt your statement Brian.
Reply
Old Nov 1, 2010 | 04:42 PM
  #157  
Roocars's Avatar
Roocars
Instructor
15 Year Member
 
Joined: Dec 2004
Posts: 135
Likes: 0
From: Pickering Ontario
Default

Hi Rick

I know you don't know me, but I have seen some of the engine threads on your 421. I might be able to help you out on the fast bank to bank system, a bin file to get you up and running, possibly. I run the same system on my 88z52 and have it running not to badly. I think my engine and set up is close enought to yours it would start and run so you could start the real work. I am out of the contry { Bulgaria }right now to have the wife treated for her MS. But will be back in Pickering in 12 days. I might be able to give you some tips to help after getting it started as well, as the instructions with the program are not up to much. I run mine in closed loop for the most part with 2 broad band O2s
just to keep track of the fast system. You can have a look at my engine
in my profile and see what you think and let me know.
Take Care
Brian
Reply

Get notified of new replies

To Installing the 421.....

Old Nov 1, 2010 | 05:09 PM
  #158  
JAKE's Avatar
JAKE
Le Mans Master
10 Year Member
 
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Default

Originally Posted by bjankuski
I am positive the stock ECM can control your engine with a custom tune. I have tuned many combinations that are more radical then yours with the stock ECM. You may want to consider that as an option, so you can at least drive the car while you wait for the fast XFI.
I tried to convince a friend of mine of the same thing. That he could run the stock re-programmed ECM to just get the freshly built 434 I did for him up and running. New Bow Tie block, new forged crank, new Carrillo rods, custom JE pistons, max ported 15* Brodix heads, max ported Mini-Ram flowing just over 400 CFM, custom solid roller, Jesel shaft system, on and on and on.

That was around ten years ago and the car (86 Vette) still can't be driven. Unbelievable FAST problems.

Too many cooks in the kitchen. Someone convinced him that he JUST HAD TO HAVE an aftermarket system. Oh, well!

Jake
Reply
Old Nov 1, 2010 | 06:36 PM
  #159  
Pete K's Avatar
Pete K
Race Director
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 2004
Posts: 12,518
Likes: 19
Default

Originally Posted by JAKE
I tried to convince a friend of mine of the same thing. That he could run the stock re-programmed ECM to just get the freshly built 434 I did for him up and running. New Bow Tie block, new forged crank, new Carrillo rods, custom JE pistons, max ported 15* Brodix heads, max ported Mini-Ram flowing just over 400 CFM, custom solid roller, Jesel shaft system, on and on and on.

That was around ten years ago and the car (86 Vette) still can't be driven. Unbelievable FAST problems.

Too many cooks in the kitchen. Someone convinced him that he JUST HAD TO HAVE an aftermarket system. Oh, well!

Jake
Maybe not Jake. I have a pretty large customer base that leads themselves to the magic water and takes a drink.
Some are convinced that if it aftermarket, and expensive, it is better, regardless of what it is.

On a similar note, I wish someone would explain the difference (between a fast type system, and oem) to me, because I don't really understand.
What is the real difference between these systems?

If they are all capable of manipulating the air fuel ratio at a given rpm/load range, as well as allow timing changes in the same areas, what are the advantages to ripping out a factory system, and re-wiring a car for aftermarket?
Everyone I know that has done it, has regretted it (on a street driven car anyway).

Inquiring minds (mine) would love to know.
Reply
Old Nov 3, 2010 | 12:24 AM
  #160  
88BlackZ-51's Avatar
88BlackZ-51
Thread Starter
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default

Originally Posted by Roocars
Hi Rick

I know you don't know me, but I have seen some of the engine threads on your 421. I might be able to help you out on the fast bank to bank system, a bin file to get you up and running, possibly. I run the same system on my 88z52 and have it running not to badly. I think my engine and set up is close enought to yours it would start and run so you could start the real work. I am out of the contry { Bulgaria }right now to have the wife treated for her MS. But will be back in Pickering in 12 days. I might be able to give you some tips to help after getting it started as well, as the instructions with the program are not up to much. I run mine in closed loop for the most part with 2 broad band O2s
just to keep track of the fast system. You can have a look at my engine
in my profile and see what you think and let me know.
Take Care
Brian

Ok thanks alot! I would like to chat when you get home. FYI. I have a tune that is somewhat close. It's getting the car started with the FAST that's the issue. Ill explain when we talk.

Last edited by 88BlackZ-51; Nov 3, 2010 at 12:27 AM.
Reply



All times are GMT -4. The time now is 01:51 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-7
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE