Can a b18c fit on top of a b16a2?(gsr head on top of si engine)
Would the engine run or would it just blow up?
Because i might want to try and to see if it will have ***** or not?
I just want my question to be answer.

 

well...the b16 is vtec and the b18c is vtec soooo just swap cams not heads...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by altoid &raquo;</TD></TR><TR><TD CLASS="quote">well...the b16 is vtec and the b18c is vtec soooo just swap cams not heads...</TD></TR></TABLE>

my si head doesnt have cam caps at all and im getting a different head so thats why im doin that

 

yes it will fit, and it will bump the compression up .2, but it will not flow as well as the b16 head... it depends on what you want to do with it... if you're going all-motor, it won't really matter, but if you're going turbo, i'd reccomend sticking with the b16 head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by saggleman &raquo;</TD></TR><TR><TD CLASS="quote">yes it will fit, and it will bump the compression up .2, but it will not flow as well as the b16 head... it depends on what you want to do with it... if you're going all-motor, it won't really matter, but if you're going turbo, i'd reccomend sticking with the b16 head.</TD></TR></TABLE>

hm ok but are u sure bout that &gt;?

 

yes

 

however, you can run the GSR head on your B16A block with a Skunk2 intake manifold. You should a better increase in torque when you go GSR head on a B16A engine too. The Skunk manifold would elimidate the use of 2ndary butterflies and act like a single-runner intake manifold, just like the B16 intake manifold.

Something to think about...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Katman &raquo;</TD></TR><TR><TD CLASS="quote">however, you can run the GSR head on your B16A block with a Skunk2 intake manifold. You should a better increase in torque when you go GSR head on a B16A engine too. The Skunk manifold would elimidate the use of 2ndary butterflies and act like a single-runner intake manifold, just like the B16 intake manifold.

Something to think about...</TD></TR></TABLE>

what do u mean by butterflies and actin like a single-runner intake manifold

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CrazyKoreanCrx &raquo;</TD></TR><TR><TD CLASS="quote">

what do u mean by butterflies and actin like a single-runner intake manifold</TD></TR></TABLE>

"butterfly(s)" are the round plates that open and close either inside an intake manifold or on the throttlebody itself. Here's an image of a dissasemble GSR intake manifold:



This manifold is an example of a "dual butterfly" intake system. The first butterfly (not seen) is normally the throttlebody's round plate or butterfly, and the secondary butterlies would be the row of 4 round plates you see in the picture.

For the B-series engine lineup, only the GSR intake manifold has these secondary butterflies. All other B-series intake manifold's (B16,B17,B18C-R) are single butterfly intake systems, only using a single round plate thats found in the throttlebody.

Ever notice and wonder why the GSR intake manifold is shaped like a snail shell ? It's made like that on purpose to create better low-end torque in conjunction with the secondary butterfly system. See where it says "primaries"? air flows normally through those 'primary' ports, and the those secondary butterflies gradually open up throughout the powerband as RPM's climb to redline. Depending on vacuum and how hard your pressing on the accelerator, they don't fully open up till about 5500+ rpm.

This GSR manifold seems to be a draw back in top end power for some. So, Skunk2 made a type-R style manifold to replace the GSR manifold, specifically for the GSR/P72 head, which is a single butterfly style. It showed gains of about 7hp by just replacing the manifold alone. Although, there is power to be made from a GSR manifold. Erick's Racing has done some extensive testing and they've actually made better power with the GSR intake manifold (w/removed secondary's) over the Type-R manifold.

...understand now?




Modified by Katman at 9:39 PM 6/24/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Katman &raquo;</TD></TR><TR><TD CLASS="quote">

"butterfly(s)" are the round plates that open and close either inside an intake manifold or on the throttlebody itself. Here's an image of a dissasemble GSR intake manifold:



This manifold is an example of a "dual butterfly" intake system. The first butterfly is normally the throttlebody's round plate, and the secondary butterlies would be the row of 4 round plates you see in the picture.

For the B-series engine, only the GSR intake manifold has these secondary butterflies. All other B-series intake manifolds (B16,B17,B18C-R) are single butterfly intake systems, only using 1 round plate thats found in the throttlebody.

Ever notice and wonder why the GSR intake manifold is shaped a snail shell ? Its made like that on purpose to create better low-end torque in conjunction with the secondary butterfly operations.

This GSR manifold seems to be a draw back in top end power for some..So, Skunk2 made type-R style manifold, which is single butterfly style, for the GSR head, which showed gains of about 7hp by just replacing the manifold alone. Erick's Racing has done some extensive testing and they've actually made better power with the GSR intake manifold w/removed secondary butterflies.

...understand better, now?

</TD></TR></TABLE>

Great explanation

 

hey thanks that was an great explantion on the butterflies

 

np.