im in the process of planning my project.its for a 450+hp b series.will be a fully built and sleeved b18a,thats a given,and already determined.

what head is best,vtec or non vtec,ive read a few things about vtec and turbo not going well together.before i buy my head id like to get a few good opinions on it.i have found a very cheap ls manifold (str).so tell me what you think,vtec or non vtec?

 

Vtec all they way man, thats where the hp is at!!

Adi

 

Portlflow: http://www.overboost.com/story.asp?id=463

Golden Eagle Mfg. Sleeves: http://www.overboost.com/story.asp?id=464

Golden Eagle Mfg. Bottom End Build: http://www.overboost.com/story.asp?id=1034

Final Engine Assembly: http://www.overboost.com/story.asp?id=1118


I'm trying to squeeze every ounce of power out of my LS engine. Here are the specs:

Golden Eagle Mfg. 84.5mm Godzilla Sleeves
Portflow Cylinder Head (B18A1)
Ferrea 1mm OS SS Valves
Golden Eagle Mfg. Intake Manifold (Port matched by Portflow)
Crower Ti Retainers
Crower/Portflow DVS
Wiseco 9.2:1 84.5mm Pistons
Crower 3140 Rods
Z10 Girdle


We are shooting for 300 WHP on the street (usable power) and 450WHP on the track.

 

Why would you go non-vtec if you're aiming for that much power? The vtec heads make more power, starting with an LS is just going to make your job a bit tougher.

 

well that guy cheesefrog is making well over 400WHP on a non-vtec head. The block is build, thats all that matters

 

with all the money youll spend to make the LS head flow half decent (as good as a stock vtec head if your LUCKY), you might as well have gotten a vtec head.

 

I understand that, but we would like to do something different and push the limits of the non-VTEC head. After we are done maxing out our LS, we might try and build and LS/VTEC.

 

By the way, here are the numbers on the head (from Tom Fujita):

251 CFM on the intake side at 25 inches of H20 ~ 19% increase comp. to stock.
206 CFM on the exhaust side at 25 inches of H20 ~ 12% increase comp. to stock.

For a full article with images, check out the link below:

http://www.overboost.com/story.asp?id=463

 

I'm making 350 to the wheels right now...don't think my ls head will make anymore so i'm gonna try slapping on a vtec head soon. it kinda sucks too cause once i do that...gotta spend $140 for tuning and buy another ecu. i'm sure the head could help produce over 400whp but i don't feel like spending a few grand on it. i'm a simple and cheap guy...i just wanna slap on and go.

 

two words: **** VTEC.

That is all

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Speed PHreak &raquo;</TD></TR><TR><TD CLASS="quote">two words: **** VTEC.

That is all</TD></TR></TABLE>

LOL! You don't know what you're missing. (mainly horsepower, HaHa!)

 

LS/VTEC all the way

 

vtec isnt all that..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Armaan &raquo;</TD></TR><TR><TD CLASS="quote">By the way, here are the numbers on the head (from Tom Fujita):

251 CFM on the intake side at 25 inches of H20 ~ 19% increase comp. to stock.
</TD></TR></TABLE>
Not bad, considering a stock B18C5 head flows 235 CFM @ 25" H2O.

 

What lift are those numbers at?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">What lift are those numbers at?</TD></TR></TABLE>
The ones I quoted, .500. Just got the info off Alaniz-Tech's website (used the flow vacuum conversion chart to get the flow @ 25") Not sure about Armaan's.

 

Tony1, I don't know what lift the numbers were taken at; probably .050 since it's the industry standard.

 

I assume you are driving a non-turbo car.
one you got boost, Vtec doesn't matter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by System-7 &raquo;</TD></TR><TR><TD CLASS="quote">I assume you are driving a non-turbo car.
one you got boost, Vtec doesn't matter.</TD></TR></TABLE>

actually vtec cars make more power on boost than non-vtec cars. if tuned right a vtec motor can make 1/3 to 1/2 more power. exactly why i'm getting a vtec head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by System-7 &raquo;</TD></TR><TR><TD CLASS="quote">I assume you are driving a non-turbo car.
one you got boost, Vtec doesn't matter.</TD></TR></TABLE>

actually,my b16a3 is turboed,but im starting a new project,with a new car.

i have a ls motor and wanted to find out if it was worth gettinga vtec head since im boosting on it.thanx for everyones response,i will be finding a vtec head now,a b16 head.