Welcome to www.JeepStrokers.com!!
Not yet a registered user? You are required to Register before you can post within this topic.

Natural aspiration, or EFI???

Newbies, and basic Stroker Recipes... Get started with your first stroker here!!
Post Reply
JT Ranch
Posts: 3
Joined: August 27th, 2019, 5:12 pm
Vehicle Year: 1979
Vehicle Make: jeep
Vehicle Model: cj5

Natural aspiration, or EFI???

Post by JT Ranch » August 28th, 2019, 11:29 am

If I build a 1991 - 1998 4.0 with a 1979 4.2 crankshaft, would EFI be the best route for more power, or nat. asp.?

Also, I'm in California, the dreaded emissions state, and, I've heard that I have a better chance of passing emissions testing with EFI.

Thank you in advance for your thoughts!

User avatar
Posts: 528
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

Re: Natural aspiration, or EFI???

Post by SkylinesSuck » August 28th, 2019, 1:35 pm

Naturally aspirated means no forced induction i.e. supercharger or turbocharger. EFI is electronic fuel injection.

I think you are asking EFI vs. carb, and while both can work and pass emissions just fine, EFI (especially with tuning) would have an advantage, along with drivability.

User avatar
Senior Member
Senior Member
Posts: 2839
Joined: March 8th, 2008, 12:58 pm
Stroker Displacement: 4563cc
Vehicle Year: 1992
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Cyprus

Re: Natural aspiration, or EFI???

Post by Cheromaniac » August 29th, 2019, 9:12 am

EFI wins hands down for drivability under all conditions, more power, better fuel economy, and lower exhaust emissions.
In your case the choice between EFI & carb is a no brainer.
1992 XJ 4.6 Stroker - 5MT - Sold :cry: Stroker build-up, Stroker "recipes"
2006 Mustang GT - 5MT - Midlife crisis car :D with Mods

Post Reply

Who is online

Users browsing this forum: Google [Bot] and 9 guests