AR_96

i was wondering how much boost i culd rum on stock internals on my d15b7 motor? just running a small 16g turbo.

slowhatchcali

1.5lbs lol.. jk tuned maybe like 8-10 max? these motors arent the best candidates for turbo, at least not stock..

AR_96

all stock but forgot to add i have a y8 head if that matter any

slowhatchcali

its mostly the block that's at danger.. build it then boost, you'll be happy with the end results if you do it right the first time..

R.Storvick

AGREE!!! lol

tunerkid7

why push stock block when as said before just build it first then you can up the boost and have more fun

blue92eg6

x2 i had a bone stock bd15b7 that i had nitrous on cause i am a retard... and it held a 175 shot of nos for about 3 runs.. now i have a 92 dx with a wire tuck and a b18b in it ready to be build for boost... do it right the first time... its a LOT easier

reyracerx

8 pounds on stock motor no problem. just make sure you tune.

AR_96

yes im tuning with hondata s200

BigJnWorldWide

I wouldn't really go in terms of how much boost but rather how much hp your B7 is tuned to. I wouldn't go over 200hp. And give yourself a lil more piece of mind and use ARP's to torque your head down. GL and be warry of your crank twisting.

jdmsupreme2132

If you do this, your going to need to put out some money for a nice set up. And that still dosent guarentee the "kaboommm" factor...lol

BigJnWorldWide

Don't worry about "kaboon" unless your motor is in bad shape. If its healthy then you should be fine boosting at 200hp all day. People have been doing HMT setups on B7's for ages. As long as you don't beat the crap out of it the only thing I would worry about is a spun rod bearing here and there. Still no fun but its as good as you're gonna get on a B7. Any questions feel free to PM me. I've been researching a "strong" D15B7 boost build for over a year now.

ej1love

be good and safe with 5-7psi...

turboblack2door

Quote:
Originally Posted by slowhatchcali
its mostly the block that's at danger.. build it then boost, you'll be happy with the end results if you do it right the first time..

AGREE!!! lol

disagree the block is stout over 400whp! the rods are the weakpoint they will only take about 200whp-210whp which would probrable be somewhere near 13lbs-15lbs depending on the tuning

Unseen Racer

now i know that your a newb.
so i will give you some helpfull advice.
stop posting threads.
SEARCH
and when your ready to post a thread(IF your question has not been answered by searching) THEN post.AND POST IN THE CORRECT FORUM!

this is the 92' - 00' civic forum NOT the Forced Induction forum.

a moderator has been contacted to lock/move this thread

BigJnWorldWide

Ouch!


All hostility aside......200-210hp is quite a fun lil DD, especially if you do the D16A6 cam swap. Hope we all answered your questions.

And there's nothing wrong with being a nOOb. Look at me. Been here 2 days and posted 9 times and haven't been flamed yet. Hopefully my posts have helped someone.

AR_96

ok sorry.my bad u douchbag

Unseen Racer

im trying to help you here you dumb F***!

Psychoteen101

This thread is dumb, not only because of the OP's question, but all the info that follows.


Also, the block is about the last thing in the bottom end you should worry about. Take a look at your pinky finger, thats about the size of your rods. Also, the rings/ring lands arent gonna hold up to much boost.

8-10lbs is really pushing it with that motor. Honeslty if it were me, which if it was i probably would never boost a D15, id spring for a D16, but that aside, depending on the turbo, i would not push that motor above 6lbs. And thats if it was in perfect running condition with good compression and no burning oil or coolant.

Dont waste your time, just buy a D16Z6 or Y8 or ZC (SOHC) and boost that. The motors are cheap and will be a step above reliability compared to a B7. But either way, 200+hp on any stock internal D series is never gonna be "reliable".

AR_96

yea i just bought a d16y8 yesterday just in case because i have a feeling the d15 is not gona last long

Unseen Racer

and this only proves my point that i was trying to help.
the people in THIS forum know a great deal about boost.
WAY more than the people in 92' - 00' civic forum.
so you are welcome

HiProfile

Common D-series issues:

*Rods snap at relatively low HP levels (200-250whp)
*Ringlands crack like any other B/H/F series
*So-called "Headlift" limits the amount of peak cylinder pressures you can run (affected by turbo size and psi)
*Y7 & Y8 oil pumps are pitiful, and their cranks aren't crossdrilled. Bearings eat themselves at random



The small 16g turbo is too big for that motor. With a smaller turbo like a 50trim T3 or a T25, you can have less lag but still "max out" your rod's power limit.

Psychoteen101

Yes, a T25 is a good turbo for that. Still i wouldnt run more than 6-8lbs of boost, which with a good tune, you shouldnt see more than 180whp, probably less, but it will spool so quickly, it will feel much quicker than it really is.

albert_urban

Stock with nothing changed, 7lbs. with bigger injectors an safc or hondata, 10lbs with @12.5 WOT on tha AFR and timing retarded. The compression is too high to be stable. Ive went through 3 sets of pistons and rings cracking the lands because of detonation. I retarded the timing afterwards and it was good. I got greedy and advanced it and blew more lands. I went ahead to be safe, and switched out the PM3 pistons for D16a6 pistons which dropped the CR to 8.30:1. I feel alot more secure now and its been running like a champ. It sits below the block deck with no valve slap. I believe the A6 and B7 heads are the same because of the compression ratio calulator that Ive used. Im tempted to try and boost it to 14lbs which I believe will hold it but Im tired of ripping my block apart every other weekend. I want my ride to be dependable so thats why im going to leave it at 10. Some guy bent his rods at 17lbs. My DX coupe pulls hard in 3rd with 1st and 2nd wheel spin.