theoriginaljmft

I am a noob and am wondering which is better for me d15b , or dohc zc i am wanting to boost it on a budget i appreciate you knowledgable guidance.

JDM_Frijoles

You cant just boost any motor its gotta be built for boost. I suggest try an LS/Vtec and boost or just chill for now and stack your money till you get a JDM B series of some sort and build on that. Im not a pro just stating my logical point of view. BTW whats your budget i think youll get more feedback if we knew how much money your willing to spend.

hatch96y7

well u can both of those motors but the d15 will probably be a liitle better but look for an engine with lower compression

shrums-EG6

b18b also known as an ls

im4eggrolls

well the words boost and budget do not go together. if ur gonna boost be prepared to spend some $$$$ just save up the money adn do it right slevves built head and forged internals. if u wan tto have boost for more than 4 days do this. aight later

Jhonny Ricer

not true you dont need low compression for a boost and you dont need booko bucks for a custon fabbed turbo set up
but as they said state you budget so we can help a lil more

broketuner-Sol_Si

go with a jdm d15 VTEC motor (or d16z6 if you can find one), and then try and look for a good condition used greddy kit or piece together a kit. I really am against the ebay kits that are like 1000 for everything brand new, because the quality is so variable...some have had their turbos/manifolds/wastegates fall apart as soon as the motor was started(not even revving, just starting it up and idling to check for oil leks and stuff), others have only had minor problems with the manifolds cracking after months of abuse...so it's very suspect getting something like that. You could try and piece together a kit, but that could end up more than just buying one. Either way you go, plan on at least 1500 for a reliable turbo setup(not including the cost of the motor)

If you want to piece together a reliable/cheap kit here's what I'd go for:
Greddy (or similar) log mani-300(can sometimes find them used for less than 150)
t25 from a dsm(or similar)-350(or get a blown one for like 100 and rebuild it)
downpipe-200
oil lines-100
IC piping-200(ebay has some as cheap as 150)
FMIC-200(ebay has some as cheap as 100....not sure how they'd hold up though)
Greddy style BOV-75(get from a reliable shop...some of the ebay ones have plastic or worse yet cardboard in them, most of the quality knockoffs that some of the shops offer are all metal and just as good as the real thing)
gauges-150
tuning-350

Syndacate

Out of those two I'd go with the D15B7, or you might want to search for a JDM D15B. That's the second best D series for boost in my opinion. The first being the D16Z6.

Just my opinion.

Nameless Warrior

B18c1

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nameless Warrior &raquo;</TD></TR><TR><TD CLASS="quote">B18c1 </TD></TR></TABLE>

Yes, let's talk like he has infinite money for a second:

The best motor for boost is a GSR block with a B16 head and low compression pistons.

hondaej8

or ls turbo :]

theoriginaljmft

my budget is around 1000 for the motor w/o breaking it open and the d-series will bolt right in is why i was going with it but i am open to other possibilities

HiProfile

Umm...wtf? WTF is with these people and their advice??? ****, go over to homemadeturbo.com and let their info OWN your asses.

I'd suggest a DOHC ZC (no vtec issues, easier tuning), a .42/.48 volvo/saab/chrysler turbo (internal wastegate), HF manifold, 390cc or larger injectors (DSM 450cc), uberdata/crome for standalone management, ebay BOV, welded mandrel steel piping off of ebay, a stealthmode oil kit, and ARP headbolts. Thats less than just about any complete b-series swap (the average price), and will make & support a LIGITIMATE 200whp.

Anyways, the D15B with an okay street tune is safe around ~200whp, assuming its straight from an importer and not beat up. The DOHC ZC has stronger rods as well as a nicer midrange, but you have issues with it's higher compression and ultimately its pistons. It will probably make some more torque for the same amount of boost, but slightly less peak HP. The weak points in these engines are basicly just bearing life, the rods/piston, and headbolts. The sleeves hold a lot, the HG is fine with arp's, and less d-series cranks have snapped than people have died in Space Shuttle accidents. Avoid too much power/boost, detonation, and lean/rich conditions, and it will last a long time.


Modified by HiProfile at 12:19 PM 9/23/2006

mullenite

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by broketuner-sol_si &raquo;</TD></TR><TR><TD CLASS="quote">
t25 from a dsm(or similar)-350(or get a blown one for like 100 and rebuild it)</TD></TR></TABLE>

If you pay $300 for a used DSM t25 you are not only getting ripped off, you are getting a pretty crappy turbo as well.


I agree that you shouldn't listen to this advice and to check out HMT.

eclipses and the like are a good place for cheap parts though:
1g M/T came with "blue top" 450cc injectors and a MHI TD05-14B turbo
1g A/T came with 390cc injectors and a MHI TD04-13G
all 2g turbo dsms came with "black top" 450cc and a MHI/Garrett Hybrid TD05-T25
3000GT VR-4 came with 390cc injectors and turbos too small for any normal app (9b or something)

Good luck with your turbo D-series

Bense

another note

if it's a jdm d15b, the crank has larger rod journals than the other d15s. the d15b has d16 sized journals. it also uses longer d16z6 rods (137mm) So you can use any d16 rod for a rod upgrade.

castronovab

buy a new d16y8, low mileage

broketuner-Sol_Si

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mullenite &raquo;</TD></TR><TR><TD CLASS="quote">

If you pay $300 for a used DSM t25 you are not only getting ripped off, you are getting a pretty crappy turbo as well.
</TD></TR></TABLE>

No that's for a freshly rebuilt t25, not a used beat up one.

JDM92Bubble

you want a nice reliable setup here you go.
t3/t04E .57 trim turbo
log mani. with a good WG placement
Ebay FMIC
2.5" IC pipes Ebay
WG, BOV, all your lines
EMS like neptune, crome, uberdata whatever
vitara's with TT rods in the block

you can make some serious power with a simple setup like this and a great tune and you'll be smoking v8's all day.

peace

mullenite

even then i'm not sure i would use one... never used on a honda but on a 2g DSM boost started falling off around 4k. Peak by 3k and bleed 5psi by 5k leaves a lot to be desired in a turbo if you ask me.

theoriginaljmft

just a thought but would a d16z6 crank fit in a d15 and would it help at all

broketuner-Sol_Si

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM92Bubble &raquo;</TD></TR><TR><TD CLASS="quote">you want a nice reliable setup here you go.
t3/t04E .57 trim turbo
log mani. with a good WG placement
Ebay FMIC
2.5" IC pipes Ebay
WG, BOV, all your lines
EMS like neptune, crome, uberdata whatever
vitara's with TT rods in the block

you can make some serious power with a simple setup like this and a great tune and you'll be smoking v8's all day.

peace</TD></TR></TABLE>

Isn't that turbo a little big for a sohc motor? Guess it depends on the power goals...but I wouldn't think a t3/t04 E would spool that great on an SOHC, t3/t04 B I think would be better. But like I said, could depend on power goals and I may be wrong.

Sifu

With everyone talking about the JDM d15b, which version are you talking about? Arent those the vtec-e engines used for economy?

nonvtecD

Holy crap there is so much mis-information in this thread.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM_Frijoles &raquo;</TD></TR><TR><TD CLASS="quote">You cant just boost any motor its gotta be built for boost. I suggest try an LS/Vtec and boost or just chill for now and stack your money till you get a JDM B series of some sort and build on that. Im not a pro just stating my logical point of view. BTW whats your budget i think youll get more feedback if we knew how much money your willing to spend. </TD></TR></TABLE>

No...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by im4eggrolls &raquo;</TD></TR><TR><TD CLASS="quote">well the words boost and budget do not go together. if ur gonna boost be prepared to spend some $$$$ just save up the money adn do it right slevves built head and forged internals. if u wan tto have boost for more than 4 days do this. aight later</TD></TR></TABLE>

No...<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sifu &raquo;</TD></TR><TR><TD CLASS="quote">With everyone talking about the JDM d15b, which version are you talking about? Arent those the vtec-e engines used for economy? </TD></TR></TABLE>

No... The D15z1 is vtec-E totaly different motor. How about everybody in here goes and reads up about, hmm, everything. Quit spreading rumors about how you need to sleeve a B18c if you want a turbo honda . And quit suggesting the GayDM D15b, you can get a D16z6 which is cheaper and already in the United States. If you want a cheap turbo setup then read! and piece one together yourself for $1000 like you said. Any D motor will hold 200 hp and be tons of fun if tuned correctly. BTW, don't go over to HomeMadeTurbo with these stupid questions because instead of getting stupid answers like here you'll just get made fun of

JDM92Bubble

i suggested that turbo because when he decides to upgrade internals he has a turbo already and yes that turbo will be fine for stock as well. Look at all these 300-400whp D using that turbo on stock or mildy built bottom ends. you don't need to sleeve **** some ppl are just retarded, your not building a 700hp drag car. peace

theoriginaljmft

after seeing the possibilities i am going to do my homework before i jump into this but thanks for the info