how strong are d15's?
 

hey guys im curious, how strong are d15 motors? im guessing a bit weaker than d16's but i see guys running some good boost on the jdm d15 motors. Im thinking i might use my spare d15 just as a test motor, but i wont if it's gonna pop immediatly, thats not worth my time. The motor is a 160K mile d15b7 it always ran very strong and never burned or leaked anything. I would run the IHI rhb5 turbo at stock 8lb wastegate, hf mani, walbro pump, 450cc injectors, afc , small fmic, some sort of a turboedit map for my chipped ecu, maby a little dyno tuning.

Re:how strong are d15's?
 

Having a ride on a Boosted JDM D15 @ 8 PSI was what made me think of boost and boost my D16 motor. That thing pulled really nice.

It was D15 Vtec

Re:how strong are d15's?
 

my d15b7 is currently boosted. 6psi with a fmu on DPFI :o with no problems. stock timing

Re:how strong are d15's?
 

it depends on a lot of factors, so a definate number of miles can be given before it 'pops'. If it's a spare I say go for it, it'll give you some tuning experience... so ditch the hack and go with a chipped ecu, when the d15 does go You'll have a good grasp on street tuning and what not to do.

Re:how strong are d15's?
 

lets hear some guesses on how long it will last..anyone, anyone... :P

Re:how strong are d15's?
 

15 seconds at 23 psi

Re:how strong are d15's?
 

well outa for engines ive had so far the two that blew were d15's. i think they suck balls but if you only boost a lil bit unlike my ass then it might last you a while. ;)

Re:how strong are d15's?
 

ran a D15B2 with MPFI conversion for 2 month's at 14 psi...with the hack on a PM7 ZC ecu...running pretty rich.
Toyota CT20 turbo AR .42 comp...compressor was as big as a T3 AR .42 I measured it and had it side to side with a T3...

Re:how strong are d15's?
 

that makes me laugh. where you like, "hmm how much boost? awh eff it 14 psi it is" is it still in action?

Re:how strong are d15's?
 

i had a d15b7 in my 95 dx. didnt know what was done to it but it had major balls. kept up with a 99 si until mid 3rd gear. i boosted the b7 with the rhb5 and reached full boost around 3500rpms. then i got turbo happy and messed around with a mbc and cranked it up toi 15psi (accidently) and smashed 1st gear and 2nd gear then 3rd gear kaboom!

Re:how strong are d15's?
 

I didn't want to run 14 psi though...it was actually 1 bar.
Think the turbine housing was so small the thing kept on spooling when passing 5500 rpm's.(wastegate was set at 7 psi)
Small internal wastegate hole etc...
I raped it like I wanted to break it...actually i wanted to blow it up but it didn't....3rd gear and 4 gear 14 psi pulls are nice...sometime it hit limp mode at lika 7K rpm's lol...those were scary thought the motor blew a few times, but it didn't.
eventually I sold the car afterwards....without the turbo kit. A lady hit me from behind and I got my insurance money sold the car and bought an '89 EF si...just because parts for it are cheaper and more abundant and I'm still a college student...

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are you serious..?<:D

i boosted my d15b2 w/14b@11psi with 329,000 kms running uberdata... lasted less than 3 months when it lost too much compression... i've been led to believe that shorter rod stroke is better at high rpms

ohh ok thanks man..

what would you suggest for my d15 non-v. guys help me out. ive got my turbo and its a big DSM turbo.. would you suggest to upgrade besides my injectors..? HELP thanks peopleS...and will my motor handle it, safely.?

ok everyone is throwing around psi as how much psi well lets look at in HP a d15 should and i say that loosely because i dont know the condition of your motor handle 200whp so go for that not how much psi.

try telling that to the fags at honda-tech or any dsm/srt4 owner

SERIUOULS HUH-
 

:3:3:mad:
what year is your accord..? accord right.? i had a 91 accord f22a4..lets see your set brah- or send me a pix to my email @ sirskip1213@hotmail.com

i havent had an accord in 2+ years. it was 93 with a dsm manifold and 14b

10 pounds of boost stock internals

correct me if im wrong

I had a D15 that took a lot of ---- from from N/a to boosted. I sold it and the guy blew a rod through the block using a dry 80 shot of NOS.

I guess every motor is different! You can't expect a little single cam to withstand too much boost or NOS.

Go over 170HP for long and boom! The connecting rods on the D15s are thinner than your pinky.

my d15b running 6-8 psi no tune no boom yet (2 years)

i got my d16z6 recently boosted with an fmu ... runs clean as hell .. i dont think u shud go to high tho like over 8psi ?

this thread is 5 years old

its good though cause i just got my hands on a ef hatch with a d15 that im going turbo on it as i type

all d-series are the same just differ liter size, it just how you build it, and how you drive it....I had a turbo d16z6 semi built boostin 12psi, had no prolem what so ever, thing ran like a champ...only problem I had was that damn aem crank pully kept comin off...due to no damper from all that vibration.