4.3 V8 upgrades? - Chevy Impala SS Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 27 (permalink) Old 10-28-2013, 11:33 AM Thread Starter
Junior Member
 
bd2022's Avatar
 
Join Date: Jun 2013
Location: michigan
Posts: 19
 
4.3 V8 upgrades?

Curious if there is any performance or dress up kits for the 265 V8 lil guy?

Chad
94 caprice bagged and bodied on 20/22
bd2022 is offline  
Sponsored Links
Advertisement
 
post #2 of 27 (permalink) Old 10-28-2013, 12:47 PM
Senior Member
 
Fred Kiehl's Avatar
 
Join Date: Feb 2009
Location: Largo, FL 33774
Posts: 10,825
 
Swapping it for an LT would cost about the same as trying to dress up the L99. You can get a good LT1 in a u-pull-it for about $300. Just make sure it has lower mileage. You can swap all of your good parts to it, and return the rest to the yard as the core. Remember to get the computer for the LT1. (The computer for the L99 will run the LT1 if you want to use it. Stock class racers use them)

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
Fred Kiehl is offline  
post #3 of 27 (permalink) Old 10-28-2013, 01:45 PM Thread Starter
Junior Member
 
bd2022's Avatar
 
Join Date: Jun 2013
Location: michigan
Posts: 19
 
LT is an option, kind of attatched to the 4.3. Mostly based on it has just under 79k, well maintained great running motor.
Thanks for the info!

Chad
94 caprice bagged and bodied on 20/22
bd2022 is offline  
 
post #4 of 27 (permalink) Old 10-28-2013, 04:41 PM
Senior Member
 
4DoorSS's Avatar
 
Join Date: Nov 2008
Location: Beautiful Chester County, PA
Posts: 7,955
 
I had the L99 in the Caprice for many years before going with an LT1. Over the years, I added just a K&N FIPK for the lt1 cars. I also added a true dual Flowmaster catback was also added to the 4.3 without any issues or tune. Not much else I wanted to do with the little engine and neither K&N or Flowmaster would say if their kits would work or cause problems on the 4.3, but both were fine and a true bolt on.

As mentioned, the 2 engines are externally identical to each other. The nice part about these mods is they are also compatible with the LT1. If you do decide to add the other side exhaust, keep in mind you will need heat shields and hangers for the other side.

================================================== =============


'95 Caprice SS conversion - Bonny Buckets - 96 Column, Shifter and Console - 3.73 Gear and Herter tune - Z/28 Cluster - Blazer OH Console - Green/Pink bushings - Chromed Impala Wheels - Eibach Springs and Bilstein Shocks - Corvette Engine Dress - the list goes on and still more to do...it never ends.
4DoorSS is offline  
post #5 of 27 (permalink) Old 10-28-2013, 05:00 PM Thread Starter
Junior Member
 
bd2022's Avatar
 
Join Date: Jun 2013
Location: michigan
Posts: 19
 
Car already has dual exhaust, not a great job done. Has manifolds, would LT headers work?

Chad
94 caprice bagged and bodied on 20/22
bd2022 is offline  
post #6 of 27 (permalink) Old 10-29-2013, 06:14 AM
Senior Member
 
4DoorSS's Avatar
 
Join Date: Nov 2008
Location: Beautiful Chester County, PA
Posts: 7,955
 
Quote:
Originally Posted by Marky Dissod View Post
To put it briefly, again, YES.
Ditto.....the exhaust manifolds are the same so Headers should bolt right up.

Back when I first did mods to the L99, it was my first crack at modifying a Computer controlled car. My only concerns at the time were "will this cause problems with the ECM since these were all designed for a 5.7 engine?". I could not get the vendors to verify if their 5.7 kits would cause any problems or not.....they had no info on the 4.3 and would not speculate one way or the other. So it was up to me to "just try it" and see.

As far as headers, just like the Dual exhaust I tried at the time, I think you will find they will fit and you just have to go for it and see if the ECM doesn't like it. But my gut tells me you will be fine. I didn't add Headers until I swapped in the 5.7, but they were on my list to add before the engine swap, just never got to it.

But realistically, how much performance you looking to get out of the old 4.3? As was mentioned, the 5.7 swap gives you more bang for your buck and certainly a bigger smile. I will add that the 4.3 I had served me well for nearly 120K (carefree) miles. When I sold it, it was still in great shape and never burned any oil.

================================================== =============


'95 Caprice SS conversion - Bonny Buckets - 96 Column, Shifter and Console - 3.73 Gear and Herter tune - Z/28 Cluster - Blazer OH Console - Green/Pink bushings - Chromed Impala Wheels - Eibach Springs and Bilstein Shocks - Corvette Engine Dress - the list goes on and still more to do...it never ends.
4DoorSS is offline  
post #7 of 27 (permalink) Old 10-29-2013, 08:12 AM Thread Starter
Junior Member
 
bd2022's Avatar
 
Join Date: Jun 2013
Location: michigan
Posts: 19
 
Not looking to put it on a drag strip, just a little more pep would be nice.

Chad
94 caprice bagged and bodied on 20/22
bd2022 is offline  
post #8 of 27 (permalink) Old 10-29-2013, 09:32 AM
Senior Member
 
4DoorSS's Avatar
 
Join Date: Nov 2008
Location: Beautiful Chester County, PA
Posts: 7,955
 
Quote:
Originally Posted by bd2022 View Post
Not looking to put it on a drag strip, just a little more pep would be nice.
You want more Pep from a 4.3 , the mods mentioned will maybe give some benefit. No numbers to back this up and it could have been a Placebo effect with the car at least sounding better with Duals and looking better in the engine area with the CAI kit. Doubt there was much real world difference.

If you plan on keeping the engine and really want to see some Pep out of it, consider changing the rear gears. My original rear was a puny 7.5" with a 2.92 gear. Drop in a larger rear from an Impala/Caprice with a 3.42 or 3.73 and be prepared to smile more. Keep in mind that if you do this, you may need to also swap the drive shaft as the one for the 7.5" Pumpkin is too long for the 8.5" Pumpkin.

================================================== =============


'95 Caprice SS conversion - Bonny Buckets - 96 Column, Shifter and Console - 3.73 Gear and Herter tune - Z/28 Cluster - Blazer OH Console - Green/Pink bushings - Chromed Impala Wheels - Eibach Springs and Bilstein Shocks - Corvette Engine Dress - the list goes on and still more to do...it never ends.
4DoorSS is offline  
post #9 of 27 (permalink) Old 10-29-2013, 09:46 AM
Senior Member
 
Firewood's Avatar
 
Join Date: Apr 2005
Location: Atlanta Ga
Posts: 10,064
 
Nitrous!

_______________________
My S10 gave its life to bring me back home to a B body!
91 Caprice with 108, 800 miles!
Almost every wheel and tire can be answered by clicking here!
Firewood is offline  
post #10 of 27 (permalink) Old 10-30-2013, 09:19 AM Thread Starter
Junior Member
 
bd2022's Avatar
 
Join Date: Jun 2013
Location: michigan
Posts: 19
 
Smile

lol, I have 2 kids.....no more bottles!

Chad
94 caprice bagged and bodied on 20/22
bd2022 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome