HF Manifold question
 

Ok, this is gonna be a retarded question:

I bought an HF manifold w/adapter plate and turbo. So Friday I removed my stock exhaust (d15b1 in 88 hatch), and realized it looked exactly like an 'HF' manifold. Are they the same thing?

I'll want to sell my stock manifold, but wouldnt want to label it as an 'HF' manifold and be wrong somehow and waste somebody's time.

Thanks in advance

Re: HF Manifold question
 

hf, std, cx, vx... all the same

Re: HF Manifold question
 

yeah it has become known as a "HF manifold" same thing....there use to be a writeup on it in the tech section...

Re: HF Manifold question
 

Thanks for the info. ;D Now could somebody tell me what STD stands for?

Re: HF Manifold question
 

Sexually Transmitted Disease :o
Wear a condom on the mani >:D

Re: HF Manifold question
 

you gotta be carefull these days.....



oh its short for standard....

Re: HF Manifold question
 

hf std cx and vx something with the precat setup

Re: HF Manifold question
 

my 91 STD didnt ahev the " HF " mani, but it didnt look like the Si one either

Re: HF Manifold question
 

yes, the earlier std hatches had the HF manifold, their is slight differences on the runners and the way it looks, but so slight that can't hardly be seen.

There was a tech article about them a long time ago. The STD I think had a number 3 on the first runner, the hf has something different. I think the STD had the larger runners, not to sure about it.

Re: HF Manifold question
 

only 88 STD has the "HF" manifold, and yes it has the #3 printed on a runner. the plenum is physically bigger and it appears that the runners are just a tiny bit bigger, but the ports look the same. so in essence, the STD manifold can be ported larger.

Re: HF Manifold question
 

It all makes sense now ;D

Re: HF Manifold question
 

https://www.homemadeturbo.com/tech_p...old/index.html

https://www.homemadeturbo.com/tech_p...ld_CX-VX_P.jpg
This manifold is off a 93 Civic CX/VX, notice it has a "L" on the #4 runner.
https://www.homemadeturbo.com/tech_p...ld_all_1_P.jpg
The HF, Std, & Civic CX/VX from top to bottom. As you can see there really is hardly any difference in the manifolds. The STD has the largest runners, and the HF/CX manifolds are nearly identical.
https://www.homemadeturbo.com/tech_p...ifold_HF_P.jpg
No markings on the HF manifold.
https://www.homemadeturbo.com/tech_p...ld_all_2_P.jpg
The CX/VX, Std., & HF (top to bottom)
https://www.homemadeturbo.com/tech_p...fold_STD_P.jpg
The STD manifold has the number three imprinted on runner #4
https://www.homemadeturbo.com/tech_p...ld_all_3_P.jpg
Left to right, CX/VX, STD, & HF manifolds

Re: HF Manifold question
 

correct std has a number 3 on the first runner and is the largest one with the biggest ports too

https://img.photobucket.com/albums/v...z/4955d9e1.jpg
https://img.photobucket.com/albums/v...z/aa527908.jpg
i know cause i got one