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Old 04-03-2015, 07:12 AM
Texas Walter's Avatar
Texas Walter Texas Walter is offline
Join Date: Feb 01, 2015
Location: North of Houston
Posts: 89
howell 2 barrel vs 4 barrel

I have a 89 GW stock I am planning to install Howell FI. The question I have is should I upgrade my intake from 2 barrel to 4 barrel?

1. Any real advantage to justify cost of new intake?
2. If yes what intake would be the best for the money?

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Old 04-03-2015, 08:02 AM
BigOberg's Avatar
BigOberg BigOberg is offline
oh i wish i had a cool handle.......
Join Date: Jan 20, 2015
Location: South Jersey
Posts: 146
I'm going through the same thing. I have an 89 GW and I'm installing a Howell FI system. The two main advantages to the intake swap are. 1) Weight reduction. The stock cast iron intake weighs a TON. 2) Better Fuel and Air flow. Should increase both performance and efficiency slightly. I ended up deciding to wait on doing mine. I have a million other things I'm doing to my GW that are burning up my budget at the moment. The other thing is I wanted to get the system installed and running correctly before I mess with the intake. Just one less thing that could become an issue when installing the new system. Later down the road it's a pretty easy job to swap the intake if I decide I want to. Good luck with yours. I will be documenting my install on my build thread!
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1989 Grand Wagoneer: 360-727-229, 4" BJ's Lift w/32's, Howell Fuel Injection, TFI Conversion
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Old 04-03-2015, 09:48 PM
Bill USN-1 Bill USN-1 is offline
258 I6
Join Date: Nov 11, 2006
Location: Oak Harbor, Wa
Posts: 360
Couple of thoughts for you guys.

1. Here's what the CFM calculator says about your 360.

Maximum Engine RPM : 4000
Engine Size in Cubic Inches : 360
Street Carb CFM : 354.17
Racing Carb CFM : 458.33

Maximum Engine RPM : 5000
Engine Size in Cubic Inches : 360
Street Carb CFM : 442.71
Racing Carb CFM : 572.92

The 5.7 TBI is just under 500cfm and the 7.4 is just under 700cfm.

What I tell customers is if you use for a driver and have a 2bbl stick with the smaller TBI.
If you Tow or stick your foot in it all the time and you already have a 4bbl the upgrade to the larger TBI.
Changing just the manifold really isn't going to do a whole lot for you unless you upgrade to the larger TBI also.

2. Something else to consider is most Howell systems are fuel only. That means your paying for a system bit only using half of it.
I have gotten more gains in drivability AND MPGs by providing my systems with full fuel and timing control.
Unless your in CA and must have a carb sticker, then you may want to consider your options.
Bill USN-1
Fuel Injection Moderator at BinderPlanet
Hamilton Fuel Injection
75 scout XLC 345/727/JPD300/3.73's/33's/4wdisc/hydroboost/EFI/OBA/OBW
1977 Innocenti 1001 (Italian Mini)EFI 1275/DIS
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