will the stock head breathe enough to make 400 whp with built bottom end and a t3/t4 hybrid?

 

any particular reason you want to use the stock ls head? u do have other affordable options

 

yes you can. get the right turbo on there and it'll make 400.

 

I am sure you could, However it might be worth to save a few bucks and do a vtec head like a B16a or Gsr. That combo you'll get 400whp alot easier then with the stock LS head.

 

i am currently working with the "ls" engine in my crx project......

trying to make as much power possible with it.... right now i am on stock cams with a mild port and i dont think that even with 400 hp you would have a big enough usable power band....this is speaking from my experience thus far....i went ahead and bought the crower 402t's to help with the flow issues as well as getting the rest of my port work done.....

i dont think that looking to get 400 hp out of the stock head is unreasonable....but definitely inpractical.....

like stated before...just save your pennies and get a vtec head....

port design on a vtec head allows for greater flow which leads to more power sooner and easier..

remember, it's not how much boost you run....it's how much unaltered cfm you produce....the inadequate port design of the LS head doesnt allow for the flow(cfm) that a vtec head will.....which in turn, doesnt create as much power....

if anyone else has input on this i would be delighted to learn more myself....
maybe someone with more experience on both ends

 

the 402t's is a bad *** set up for an LS turbo motor. A member of the board is running them and makes 470ish whp on a strait LS. I don't nessacarily think a vtec head is a "must have" depends on how much power you really want. Sometimes its better to just work w/ what you have.. I learned the hard way when I scraped my LS turbo set up a year and a half ago.

 

Thats what i'm trying, to see if i can get in to the 400-500whp range w/ an LS. But i'll prolly use a portflow head, crower turbo cams, lots of tunning

Good luck

 

Buddy of mine made 417whp/409tq on a stock LS head, with built, sleeved bottom end @ 27 psi.

 

Yes, you can make 400whp on a stock ls head. Whats going to be effected is the power band(how much power in delivered thru the rpm range). Bigger turbos that can push 40 pounds of air a min. or more like to be reved high. If I was you I would want the car to rev to atleast 8 grand in a street turbo car so cams help alot. Theres a reason honda made the stock rev limit 7200 for b18bs. Another reason why people get head work and cams in because you can make the same power you did with 28 psi at 20 psi. Its alot safer to run the motor on lowest possible boost pressure to make the power you want. Also what will help you gain big power on a turbo car is an after market intake manifold. No matter what anyone tells you. After market trottle bodys help, but there not worth it on a turbo car, unless you want to waste money.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostincoupe &raquo;</TD></TR><TR><TD CLASS="quote">Buddy of mine made 417whp/409tq on a stock LS head, with built, sleeved bottom end @ 27 psi.</TD></TR></TABLE>

409 tq is super bad ***. i love how the tq and hp #'s are so close. it would be intersting seeing the dyno graph, to see how the powerband on this setup looks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackeg &raquo;</TD></TR><TR><TD CLASS="quote">409 tq is super bad ***. i love how the tq and hp #'s are so close. it would be intersting seeing the dyno graph, to see how the powerband on this setup looks</TD></TR></TABLE>

yeah that is pretty sick to see how close those #'s are together. That car must pull hard though assuming that traction isn't really an issue or anything.

 

oik cul i maybe able to afford a vtec head in the future but now currently at this time....

 

Traction's one HELL of an issue with this car, it's for sale BTW CHEAP! (WITH a built head installed) 14k if I'm not mistaken.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rhamlinii &raquo;</TD></TR><TR><TD CLASS="quote"> Its alot safer to run the motor on lowest possible boost pressure to make the power you want. </TD></TR></TABLE>

Not really. The only reason it wouldn't be as safe is if turbo is creating more heat because it is out of it's efficiency range. If that's the case you chose the wrong size turbo.

 

go to team-integra.net

there is a 400+ LS there xrtdat (not sure) is the user, search for high Hp LS.

EDIT: you can look into the dyno section as well, maybe it will be there.

 

[QUOTE=boostincoupe]Buddy of mine made 417whp/409tq on a stock LS head, with built, sleeved bottom end @ 27 psi.[/Q

With torque like that, who needs peak horsepower????If the car was set up correctly you could pull some sick times with that set-up...

 

I personally will be going with the stock Ls head hope the see some of the #'s am hearing about.

 

Yes, you are right about what you said, but I was looking at it as. Would the motor last longer on 10 pounds of boost or 30 pounds of boost. I know this is extreme but that was what I was my point.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DeadLock23 &raquo;</TD></TR><TR><TD CLASS="quote">go to team-integra.net

there is a 400+ LS there xrtdat (not sure) is the user, search for high Hp LS.

EDIT: you can look into the dyno section as well, maybe it will be there. </TD></TR></TABLE>

that's who I'm talking about, my buddy Tyler (xrtdac).