So i have a tired old 91 Std. I also have aspired to try autocrossing this year. My only other car is a 92 sedan. While the sedan is faster, its less than nimble. Is there any performance parts for the d15 at all? I'm not asking for any large hp gains, just something to give it a little extra kick. Also, would it be wise to swap the 4 speed transmission for a 5 speed? I figured maybe second was bigger in the 4 speed, and it would be a little better suited for the tighter tracks.

well im probably wrong, and i know i could search for hours on my 56k.

Im just looking to find a purpose for an old honda that im TRYING not to sell.

thanks in advance

nolan

 

A trans would probably be the biggest improvement. Search for ratio's on here and you'll find a bunch of info. Basically 88-91Si, or 92-95 EX/Si should do you well, and with some searching, not to hard to find.

Wheels will also help. Get some ultra lightweight and cheap HX/CX/VX wheels and some decent lower profile tires, that too will maximize your gear ratio.

Use synthetics in both the trans and engine. You can gain some horsepower and durability at the track. It's been proven on the dyno, use it.

You can do little things, play with the timing (adjustable?), take the screen of of the throttle body, play with the intake and pipe cold air directly in there with a creative imagination. Header does help also.

A simple tune up (factory parts) and valve adjustment can go a long way also.

Lighten that sucker up too. You'd be suprised at what that car can do with some tinkering. Check out the autocross thread also.

 

yes get rid of the 4 speed and get a 90-91 si (d16a6) 5 speed cable transmission.

if ur looking for small hp gains, go with the basic intake/header/exhaust bolt ons

but the exhaust itself can cost a couple hundred unless u do ur own custom exhaust or go open header

 

you can also do a mpfi swap, and put on the d16a6/civic si intake manifold, injectors,a nd trhottle body, you can also swap in the d16a6 cam without any mods. Just drops right in, extra 10 hp.

 

I have a 5 speed tranny from a 92 ex sedan.

i heard it wouldnt work on the 91 because it was hydro and the 91 was cable.

I plan on gutting the interior and all of that stuff, and probably lowering it alot with some nice tires.

i just want to do this stuff as cheaply as possible because the body is pretty bad, and id like to eventually buy a new car.

thanks

 

d16 cam drops right in huh.

hmmm.

they have about 90 hp stock correct?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GarageAlchemist &raquo;</TD></TR><TR><TD CLASS="quote">you can also do a mpfi swap, and put on the d16a6/civic si intake manifold, injectors,a nd trhottle body, you can also swap in the d16a6 cam without any mods. Just drops right in, extra 10 hp.</TD></TR></TABLE>

didnt know u could interchange d16 parts with a d15 engine

dont know about that cam though, 1.6 cam going into a 1.5

 

I am pretty sure you can use the cam but I think the cam gears are different...the d16a6 and d15b2 heads are identical I think and the only difference is the cam

 

so if the d16a6 and d15 heads are the same, could i not switch the cam, and then get a z6 vtec head?

 

88-91 civic SI and DX heads are exactly the same! The only diff is the intake mani infectors and such!

 

sure the dx si heads are the same, but what does that have to do with the STD head??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HAPRECYCLING &raquo;</TD></TR><TR><TD CLASS="quote">88-91 civic SI and DX heads are exactly the same! The only diff is the intake mani infectors and such!</TD></TR></TABLE>

si has mor agresiv cam..dx an std cam r as flat az wite-girls ***..

but u shoood do mpfi conversion an sohc zc cam..si cam isnt reely worth of swap unles u can get 4 dirt cheep..then doo the basic heder,eggs-zausts,an if u want mor advans ignishin timing a bit..not 2 far tho..an get si or dx 5 spd tranny..

 

the STD have the same motor as the DX. they just have other differences. like, the STD only came in 4 spd, where the DX can have a 5 spd or and auto trans. theres more. but I would start off with what juevi said.

 

just be patient and keep lookin around you can find a z6 head dirt cheap do the mpfi conversion on it and if you wanna hook up the vtec dirt cheap just find someone with an old fields sfc-vtec controler i just got one from a friend of mine for free but even if you pay there not much

but your bigest gain would probaly come from a 88-91 si tranny (carefull cuz 88-89 have different input shafts than a 90-91 depending on witch one you get you might have to use a clutch from a 85-87 prelude Si) or from a zc tranny

and if you want super low gearing use the zc tranny with the final drive from a 88-91 si tranny

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by si0385. &raquo;</TD></TR><TR><TD CLASS="quote">just be patient and keep lookin around you can find a z6 head dirt cheap do the mpfi conversion on it and if you wanna hook up the vtec dirt cheap just find someone with an old fields sfc-vtec controler i just got one from a friend of mine for free but even if you pay there not much
</TD></TR></TABLE>

No dont do that please..Thats not really vtec..You would also to have some sort of way to add fuel and timing at the vtec rpm..And all the vafc does is take away fuel and act as an expensive rpm switch,,

To the op I agree with what brijpurt13b said..sohc zc cam,mpfi conversion,header,exhaust,and advance timing a bit,,Then get a si tranny,,Also get a pm6 ecu or maybe sohc zc ecu if you can find one..

 

Mr.speaker:
he said he wanted it the cheapest way possible cuz its only an auto-x car hes got another d.d. and converting to obd1 and doing it the right way will be way more than a vtec controler

 

Wow i didnt know you could do so much to these engines.

i think that my honda might actually be TOO rusty to put all this work into.

its basically missing any sideskirts it once had, on top of the typical honda rust.

i suppose if i started working on this car, i could transfer any perfromance parts to whatever car id get next (most definately a ef)


maybe ill test my body work skills.. haha who knows.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by si0385. &raquo;</TD></TR><TR><TD CLASS="quote">Mr.speaker:
he said he wanted it the cheapest way possible cuz its only an auto-x car hes got another d.d. and converting to obd1 and doing it the right way will be way more than a vtec controler</TD></TR></TABLE>

Yeah Im just pointing out that vtec also needs different fuel and timing maps..Sure you can hook up a switch and 30 amp relay to pop open the solenoid but without adding the necessary timing and fuel its pointless..

 

so a mpfi system is the way to go then?

i know this has something to do with fuel injection, but i dont really understand the differences between the two.

thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by just rave &raquo;</TD></TR><TR><TD CLASS="quote">so a mpfi system is the way to go then?

i know this has something to do with fuel injection, but i dont really understand the differences between the two.

thanks </TD></TR></TABLE>

Check this out,,http://crf50.no-ip.com/fourthgenhatch/mpfi.html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by just rave &raquo;</TD></TR><TR><TD CLASS="quote">so a mpfi system is the way to go then?

i know this has something to do with fuel injection, but i dont really understand the differences between the two.

thanks </TD></TR></TABLE>

There's an easy free mod you can do to the DPFI if you want to squeeze as much power as possible before you do an MPFI swap, check the link in the sig.

 

wowww.

you know, if im going to do all this work, i might was well just try and find a hatch thats in better condition.

Gah thats going to be so hard.

laaaaamee. i HATE rust.

 

Taking the screen off the throttle body? I take it this is only recommended for something you don't really care about? Or would you do that to just any car?

 

I did it to all of my DPFI's. Theirs nothing to worry about as long as the intake and filter are operational and secure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by square_1 &raquo;</TD></TR><TR><TD CLASS="quote">Taking the screen off the throttle body? I take it this is only recommended for something you don't really care about? Or would you do that to just any car?</TD></TR></TABLE>

Not just the screen, the butterfly plate inside of the TB will actually make a difference that you can feel and hear. Taking just the screen out and the little v-plate won't really do much until you remove the BF plate.