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

84 vette intake upgrade

Thread Tools
 
Search this Thread
 
Old May 3, 2018 | 06:14 PM
  #141  
MikeP84's Avatar
MikeP84
Thread Starter
Racer
Liked
 
Joined: Jun 2017
Posts: 311
Likes: 24
From: Ohio
Default

Thank you very much, hopefully it will help others who want to do something similar with their 84s. Now time to replace rack & pinion, power steering pump, costume exhaust, rims and paint!
Reply
Old May 3, 2018 | 07:51 PM
  #142  
Gibbles's Avatar
Gibbles
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2015
Posts: 1,275
Likes: 165
From: Utah
Default

TurnOne did mu 84 Z51 rack, i really wanted to keep the 2.0 ratio, and not much was available.

Also chatting with other rebuilders, they did not do a thing with the cause of the morning sickness these early vettes get.

Turnone actually bored the rack out and sleeved it.

Other rebuilders never returned my calls or emails once i started asking details about the service...
seems most just do seals and the basics, not touching the real issue.

​​​​​​​Just an fyi when you get there.
Reply
Old May 3, 2018 | 11:16 PM
  #143  
MikeP84's Avatar
MikeP84
Thread Starter
Racer
Liked
 
Joined: Jun 2017
Posts: 311
Likes: 24
From: Ohio
Default

Originally Posted by Gibbles
TurnOne did mu 84 Z51 rack, i really wanted to keep the 2.0 ratio, and not much was available.

Also chatting with other rebuilders, they did not do a thing with the cause of the morning sickness these early vettes get.

Turnone actually bored the rack out and sleeved it.

Other rebuilders never returned my calls or emails once i started asking details about the service...
seems most just do seals and the basics, not touching the real issue.

​​​​​​​Just an fyi when you get there.
Thank you, I was wondering about who does good rebuilds and if I can just buy a new one or not. I will have to do some research on it.

Well I did another pull and hit my rev limiter that I have set at 6k rpm. Will probably have to turn it up a little as the car still had more left in it! Impressive improvement over stock that's for sure. According to my data log I will need new bigger fuel injectors as they are above the 80-90 range. However I thought that with the newer fuel injection system I would get around the same if not better fuel economy as before but it seems like I may have been very wrong. Not sure if it is reading wrong or if there is anything I can do to improve the hwy mpg but I hope it goes up. I liked my 25mpg that I was getting before!
Reply
Old May 4, 2018 | 07:19 AM
  #144  
Gibbles's Avatar
Gibbles
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2015
Posts: 1,275
Likes: 165
From: Utah
Default

Check the data logs, if your injector duty cycle is not very high, there should be some room to play with.

Try emailing rbob, or post in the thirdgen forum under the diy prom.

The creator of the ebl is very active there.

I had to tweak my injector settings for the 80lb i have in my modded CFI setup.

Off of the top of my head i can't remeber the setting, but the one you calculate using the ebl utility tool can be tweaked to increase fueling by telling the ranges where your maximg out ve, by raising the numbers.

Also if you have not gotten there, ctrl + mouse drag in the 3d screens to rotate the view.
It took me way too long to find that. Lol

There is also a setting "sa latency"
there is a thread on thethirdgen forum that explains it.

I was using a truck setting on mine, once i found the correct one, my car really woke up.

I also found a bunch of different factory vette sa tables, google + lots of trial and error with the correct decoder files...

My car is pretty happy with a table from an 89 with my aluminum heads.
Reply
Old May 6, 2018 | 08:41 PM
  #145  
MikeP84's Avatar
MikeP84
Thread Starter
Racer
Liked
 
Joined: Jun 2017
Posts: 311
Likes: 24
From: Ohio
Default

Thanks, my duty cycle from 2nd to 3rd is above 100%, think I saw it top out at 107. It definitely runs strong but I will be messing with fueling and spark tables to see if I can get it dialed in a little more and maybe improve my mpg.


Yes Bob is quick to replay threw emails and I see him often on thirdgen. I will look on there this afternoon to see if I can find any new information to help improve performance and mpg. Just takes time researching, learning, testing, watching logs and adjusting. But ill keep at it!
Reply
Old Jul 17, 2018 | 06:53 PM
  #146  
dave_85's Avatar
dave_85
Pro
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Dec 2002
Posts: 522
Likes: 3
From: Rolling Meadows IL
Default

Nice job! I did that intake on my 85 but it didn't fit under the hood with the LS throttle body so I made an adapter for the TPI TB.


Last edited by dave_85; Jul 17, 2018 at 06:54 PM.
Reply
Old Jul 19, 2018 | 01:31 PM
  #147  
MikeP84's Avatar
MikeP84
Thread Starter
Racer
Liked
 
Joined: Jun 2017
Posts: 311
Likes: 24
From: Ohio
Default

Thank you and your build looks very nice as well! The only clearance issues I have is with the throttle cable bracket and the air filter that I'm using. Neither are to bad though.
Reply
Old Jul 20, 2018 | 07:34 AM
  #148  
marksp's Avatar
marksp
Advanced
10 Year Member
 
Joined: Sep 2006
Posts: 87
Likes: 0
From: Henryville Indiana
Default

Hey guys, does anyone know what happened to Joby's old Offy setup? I owned it for awhile and sold it in 2009. I never got a chance to play with it, my vette was totaled while pumping gas so I unloaded it.

Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo




All times are GMT -4. The time now is 10:24 AM.

story-0
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-1
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-2
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-3
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
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE