FATBOYeg6

this is something i have been wondering for a while now. i have a goal of about 400whp. i would like a gt28rs, which i know is not capable of 400whp. would it be possible to max the turbo out, and then get the rest of the way to 400whp with some nitrous? or would that be bad for the turbo? im thinking like 20psi of boost, plus maybe a 100 shot wet or direct port. i really want a responsive turbo, but would like big horsepower. does this sound like it would work?

ps. this would be on a b16. i might go ls/vtec down the line, but im starting off with the b16. it will also be fully built (pistons, rods, sleeves, etc.), so no need to worry about 20psi plus a 100 shot.

tokesGTR

Or you could just skip the nitrous and run a properly sized turbo. If you throw nitrous at it you're going to create a lot of exhaust volume and could potentially overspin and destroy your turbo, then you're in the gutter for the initial cost plus replacement cost.

FATBOYeg6

define properly sized, because as far as i am concerned, a 28rs is the proper size. great spool, sized for a small displacement engine.

f1 vtec

why not comprimise spool and go for something like a t3/t4e 57 trim or a gt35r run more boost and give the nos a miss.And then the option of more power is always there too

Zakar

at 400hp sleeves are not needed.. which will save you a considerable amount of money..

otherwise.. if you are for sure getting sleeves or its already done... dont limit yourself to 400hp.. get a larger turbo and just have the tuner see what it does.. i'm not saying put a dump truck turbo on there (though an hx40 would work nice)
look into the GT35r.. SC61 was a popular one on here for a while... and its cheap..

FATBOYeg6

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Zakar &raquo;</TD></TR><TR><TD CLASS="quote">at 400hp sleeves are not needed.. </TD></TR></TABLE>
stock sleeves + turbo + me = BOOM. im not to concerned about how much the sleeves are, i just would like to build the engine right. im not even 100% sure 400whp with iron sleeves will hold up to my driving style.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Zakar &raquo;</TD></TR><TR><TD CLASS="quote">dont limit yourself to 400hp..</TD></TR></TABLE>
i have thought about a larger turbo, but im not sure i could handle the lag. i forgot to mention, this will be daily driven. even right now i am considering a gt35r because the top end would be crazy, and 500+ whp sounds nice. my biggest concern is traction on the street. i may buy some slicks, but for daily driving, im leaning towards azenis (new ones) or something similar. i have no problem running traction bars, solid motor mounts, poly bushings everywhere else. but i still don't think that will give me traction before 3rd gear. also, a couple times you mention cheap in your post. that is my last concern. im by no means rich, actually im the opposite. but as the saying goes "cheap, fast, reliable, you can only have two..."

so does anyone think a gt30r would make an ok turbo. i know it is capable of more than 400whp on boost alone, and i may up the displacement somewhere down the line if i want better spool. it won't spool like a 28rs, but it won't lag like a 35r right?

FATBOYeg6

anyone

FATBOYeg6

i wanted to see if a gt35r would work well for me, so i have been doing some research using this link http://www.turbobygarrett.com/....html to figure out how to read and plot a compressor map. first off, according to the calculations on this site it takes about 52 lbs/min of airflow to make 500hp (i want 400whp, about 500 engine right). in the end, i have a pressure ratio of 2.04. so i checked it on the compressor map from garret, and it looks like the gt35, 76mm, 52 trim, .50 a/r compressor barely flows 52 lbs/min and it would not produce the flow needed for 500 hp (400whp).

i know people have been using the gt35r and love it, but according to the compressor maps, its just not possible to support the power. is the site wrong, or is my math wrong?

2.0FrAnKeNsTeIn

CYLINDER PRESSURE= BLOWN UP PISTONS, RODS, ETC..
NO NITROUS AND TURBO, UNLESS ITS A 25 SHOT AND ONLY TO GET YOU GOING IN FIRST GEAR.

Boostage

My vote is for one of those new small ball bearing Garret turbos and a 3 inch DP and exhuast, and a good electronic boost controller. spool would be fast and 400whp+ is achievable

FATBOYeg6

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2.0FrAnKeNsTeIn &raquo;</TD></TR><TR><TD CLASS="quote">CYLINDER PRESSURE= BLOWN UP PISTONS, RODS, ETC..
NO NITROUS AND TURBO, UNLESS ITS A 25 SHOT AND ONLY TO GET YOU GOING IN FIRST GEAR.</TD></TR></TABLE>

my roommate has been running a 120 shot for a year on his turbo neon. i helped build the engine, turbo kit, and i set up the nitrous by myself. when i told him i set him up for a 120 shot he thought i was crazy. 1 good tune, and a year later its going strong. im not worried about it.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">My vote is for one of those new small ball bearing Garret turbos and a 3 inch DP and exhuast, and a good electronic boost controller. spool would be fast and 400whp+ is achievable</TD></TR></TABLE>

small like gt28rs, gt30r, gt35r, etc. which one are you talking about, because i am set on a ball bearing garrett gt turbo. as of right now im leaning towards the gt30r because i think it will make the power i want. its rated for 500, i want 400 whp. anyone look at the garret page about reading compressor maps. im still confused as to why a gt35r compressor does not have enough flow according to garrets compressor map, and compressor map reading instructions.

sp00led

If you want 400whp pump and 500whp race then get a gt30 varient. That's what I'm in the process of putting together. If your goals are 400whp then you don't need a gt35. Also there are plent of people making high 300whp with gt28's

FATBOYeg6

yeah, im really thinking a gt3076r is what i will be going with. thanks for the help guys.

2.0FrAnKeNsTeIn

those srt-4 motors can handle some cylinder pressure. but i guess if your motor is built thhen you won't have to worry

FATBOYeg6

its not an srt-4. its a 2 liter single cam.