I am currently building a slightly modified D15B2 with the A6 cam and higher compression pistons, it will be converted to MPFI as well. Both the head and block are being remachined, and I will also be mating it to the 90 EF Si transmission. I would like to know if anybody has attempted to add the Jackson Racing Supercharger (designed for the D16A6) to this type of setup and if so how did it fare? Thanks in advance for your reasonable non-objective replies.

 

if you use the stock d15 rods (which you most likely will) it'll blow up at moderate power levels

those toothpick rods can't take any punishment

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ComputerJLT &raquo;</TD></TR><TR><TD CLASS="quote">if you use the stock d15 rods (which you most likely will) it'll blow up at moderate power levels

those toothpick rods can't take any punishment</TD></TR></TABLE>

That's great, how do you know what I am going to do, and can you reccomend rods that will work with this particular application? That is why I am asking for help. Please do not point out a shortcoming without at least advising a possible solution with a product or process that you can vouch for, and I do not appreciate people assuming what I am going to do without taking into account the fact I have indeed asked for help from people that seem to have more experience with turbo/SC setups than I do.

 

there are no solutions to a d15

no one makes rods for it; unless they're custom

ditch that shortblock and throw a D16 in it; a built shortblock d16 can be built for &lt; $700 with new parts

/edit: hell a stock D16 shortblock will probably handle the load; they've been pushed to 200ish whp without much fuss; just a set of head studs

 

ur rods are not going to "Blow up at moderate power levels"

tune it right and it'll make great power
people have made over 250whp on stock sohc blocks..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tad &raquo;</TD></TR><TR><TD CLASS="quote">ur rods are not going to "Blow up at moderate power levels"

tune it right and it'll make great power
people have made over 250whp on stock sohc blocks..</TD></TR></TABLE>

not d15 bottom ends

d16 rods are weak but d15 rods are SUPER weak; just sit one beside the other you'll think to yourself "wow......" they're puney

 

It seems that my D15B2 is doomed to just a set of high compression pistons, better springs and an A6 cam. Oh well, I might save up for something a little more fun in the future. Thanks for the input fellas, I appreciate all of your suggestions, observations, and reccomendations.

 

D15 rods are only slightly thinner than D16 rods. People have made over 200 hp on them. JRSC's for sohc's don't exactly put out a lot of power anyway. Tune it right and you'll be fine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonvtecD &raquo;</TD></TR><TR><TD CLASS="quote">D15 rods are only slightly thinner than D16 rods. People have made over 200 hp on them. JRSC's for sohc's don't exactly put out a lot of power anyway. Tune it right and you'll be fine.</TD></TR></TABLE>

dont trust those rods; i've sene "well tuned" turbo setups blow at 200whp +/- they just can't take the abuse

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ComputerJLT &raquo;</TD></TR><TR><TD CLASS="quote">not d15 bottom ends

d16 rods are weak but d15 rods are SUPER weak; just sit one beside the other you'll think to yourself "wow......" they're puney</TD></TR></TABLE>

ah i've seen pics of them side by side,
the 1.6 werent much better,
both puney, and ppl have made well over 250whp with em.

key is a good tune,
sure I wouldnt WANT to try to run 250 whp

but if he's under 200 he should be fine

 

Honestly, I just want something better than the weak stock rating of 73hp. I know I can get it done with the cam swap, decked block & head and a full rebuild. I just wanted to know if the same setup could handle the SC, and from what people are saying, it isn't something that is very popular for obvious technical reasons.

The crazy thing is, I have been searching several forums and threads, and it is pretty 50/50 one way or the other regarding if it is good or bad. I am leaning towards not doing it, as I recall anything less that 66.66% isn't such great odds for something that I would depend on with a daily driver.

 

dang, the engine is rated at 73 stock?
hmm, i'd much rather swap in a cheap sohc,
you'll have more power to start off with.

I mean, you'll probably end up with as much power as an n/a d15z6 or d15bvtec

If ur gonna rebuild it completely anyways,
why not start with some good stuff, like a sohc vtec head,
and a 1.6L block ??


but about the sohc strength topic,
heres a post I started on dseries.org about that
http://www.d-series.org/forums...pp=20

 

Unfortunately, I can not justify purchasing another head to my wife when I already have one disassembled on my kitchen table waiting for rejuvenating machine work

 

73hp sucks for stock but if it is what you have to work with, then well lets get to it.

I think if your tune it correctly and boost in moderation you will be fine. It would take alot to get to 200whp on that motor (stock). It is doable, I think its cool when people do the uncommon.

Goodluck with it

 

Thanks , I am looking for 140-150hp but if you think that 200 is do-able I will give it a shot

 

yeah, thats cool, do wut u can with wutchu got!
I'd be really curious to see what this setup is like actually.

also alot of the power drain on engines like that isn't just the longblock,
it's the intake mani, intake, tb, exhaust, excetera, basically boltons.

for instance, my d15b8 has the freakin TINIEST little throttle you'll ever see
and the IM is just pathetic,
the exhaust mani has a catalytic converter stuck up it's *** as well..

i bet if you replaced all that stuff with normal sohc vtec stuff, it'd jump a huge ammount in power.

 

I just want to have a nice motor that will still be reasonable on gas (come on, it's a freakin Honda, how much more reasonable can you get) as well as give a little kick in the pants when I want it (I am not going to race it, this is for my freeway merging pleasure). The 88 EF Hatch is a great platform (light, cheap, very structurally sound) to do what I want, I just don't see a K-swap anytime soon in my future

The D15 is a good block, and I will stand by my word, but I do know there are many more blocks out there with the SOHC setup that are stronger and more capable. Something to keep in mind, I am a former GM freak (1979 Chevy Camaro Z28/ 427 L72 block with custom sequential 5 speed, 3.85 final; she pulled 560hp at the rear wheels, that was a FUN ride with VERY expensive repair issues) and this recent enlightenment to the Honda side has freed my soul from the lack of originality and quality that Chevrolet has bestowed upon us within the last 20-30 years. I have always tried to make better what I already had in my hand, and I want this to be no exception.

In the event I make this a turbo/SC 1.5L vehicle, I will keep this group posted on how I did it (what was custom, and what stock parts I used) and how she performs in a real world situation. I will also relay any difficulties and reccomendations on how you might be able to get a baby motor to "blow" with the best of them!

 

if you want a good gas millage motor get a D16Z6; you cannot go wrong with that motor. I went from ~ 25ish mpg with my bone stock D16A6 in my 90 civic si with a crap greddy turbo kit; threw in the Z6 with FORGED ingernals (more rotating mass) and SIGNIFICANTLY lowered compression (like less than 8.5:1) and i'm getting around 40mpg on the highway

that low cam profile rips *** at gas millage then when the high one kicks in you're good to go as far as power is concerned

 

The Z6 sounds fun, but as far as multiple personalities with cams?? No thanks, I don't need that (don't really want it right now).

 

why not?

you'll want to convert to obd1 anyway to run worth_a_shit fuel management and the z6 is an obd1 motor. VEETAK is a very nice thing I just conisder it a gas millage enhancer honestly; the 2nd cam is where you make power and the first one is there for low end and gas millage.

vtec really is great; not in the ricer fast and the furious sense but in a practical sense

 

i ran 8psi on my b7 from a t3 .42 .48 daily for 2000+ miles without a hitch. i just tuned my timing very conservative in uberdata and tuned my af ratio to around 11.8 in boost. i pulled the turbo cause its supposed to be the family car.

 

Hey Hows it going TAD, Havent seen you around much, Us D-series Guru's..lol


And as for the kid with the B2, would this still have the Dual point fuel injection? if so you should, and will Highly recommend you doing a Multi-port fual injection swap, from a D16a6, Complete IM with injectors, a6 dizzy,a6 TB,a6 ecu and a good wiring diagram, and a few other things, I have lost alot of info on D-series, I sold all mine, and have fun in the Mud now..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sohcvtec66 &raquo;</TD></TR><TR><TD CLASS="quote">Hey Hows it going TAD, Havent seen you around much, Us D-series Guru's..lol


And as for the kid with the B2, would this still have the Dual point fuel injection? if so you should, and will Highly recommend you doing a Multi-port fual injection swap, from a D16a6, Complete IM with injectors, a6 dizzy,a6 TB,a6 ecu and a good wiring diagram, and a few other things, I have lost alot of info on D-series, I sold all mine, and have fun in the Mud now.. </TD></TR></TABLE>

hehe, sup buddy,
hey i've been around, just tried not to post so much .. but that didnt last very long .

and yeah from what i've heard, dpfi is really quite pointless, ie don't even try to make power with it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ComputerJLT &raquo;</TD></TR><TR><TD CLASS="quote">why not?</TD></TR></TABLE>

This is the reason I was asking about the SC, constant power add without loss when Vtec kicks in. I know that the JR unit has a problem at higher RMPs when Vtec engages (yes, I have done my research), why compound the problem by adding Vtec to a motor that doesn't need it in the first place?

I don't want a coffee can exhaust that screams "Useless POS", I don't want a body kit of any sort (including the Mugen EF), I don't want neon or a flashy paint job. All of these things say STEAL ME, and I like my car and I do not want it to get stolen. Eventually (2-3 years down the road) I would love to get a B20 (SC, of course) with a B16 trany (can you say UNDER $1k with lots-o-torque) with a stock-like exhaust (opened maybe 1/2" to 3/4" over OEM), build my suspension, and then just drive off into the sunset. There would only be the need for a conversion to MPFI, which I am already planning in the next few weeks.

All the power I want from my motor (for now) is a little extra when I want it (mostly freeway driving during my daily commute), Vtec is not neccessary for what I want my ride to do. This is why I wouldn't mind sticking with either the same block that she came with or bumping up to the D16A6 in the interim. Reasonable power with light weight is my short term goal, and my little 88 hatch is the perfect tool. The only way I can improve upon that is if I can get my hands on a CRX HF and B20 that baby (wouldn't that be fun).

 

what the **** does rice have to do with swapping in a MUCH BETTER engine in that will get more gas millage....