this just in from somewhere out there
another newbie is born
DC2 Acura Integra GSR ::: Cd = .32 JDM 3-stage VTEC SOHC D15B Honda Motor - 1.5 L Port & Polished Head / 10.5:1 Compression Ratio Nissan Skyline RB20 Turbo - Zero PSI Dry Ice Intercooler 5-speed 4.058 Final Drive Ratio Chipped Computer for Fuel/Timing Map Editing so far thats what i have going in right now i have a d15b7 with a blown head gasket burning coolant & oil like its going out of style the new engine should be in soon possibly with some alteration of temporary head/block combinations the turbo will take some time to gather funds to complete the project but i'm on the edge of my seat deciding to sell my beloved fender jazz bass to complete the project i drive for a living and have had much experience with changes in fuel consumption i'm well over 300k miles into my career... i've had my fair share of beaters inbetweeen but my primary cars that have taken me there have been: '99 3cyl Chevy Metro - 100k 46mpg avg '94 1.5L Civic Vx - 150k 48mpg avg and now my '94 Acura GSR i love this car despite its 450lb weight gain over the vx though i'm using a honda motor which weights i think 100lbs less give or take... you can see that fuel mileage is my primary goal and you can likely expect a growing presence i know honda civics like you know something alot about...lol i've spent most of my time studying all the factors of engine operation on them also doing many engine swaps...custom modifications... and of course...learning if you have a question about honda civics you can definately get an answer out of me i found this site in svoboys signature on honda-tech so thanx for that i have many plans for my car... with no limitation to opening doors to another good idea hydrogen has been my primary research area... and is what i see as the best avenue for gains i've had one mock up unit..but no testing... and i have a billion different ideas on the best way... so see you peoples around the site |
welcome
welcome
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Yo, what's up? I wonder what
Yo, what's up? I wonder what is the method of putting a d series into the gsr? RH77 might be doing this if it's so simple, or at least I want him to.
What made you settled for the d15b vtec? Power or availability? |
you actually found a 3 stage
you actually found a 3 stage vtec engine? My understanding is that they are next to impossible to find.
Anyway, welcome aboard! |
Oh shit, wasn't looking, it
Oh ****, wasn't looking, it is 3 stage, what what. They're always for sale on ebay, matt.
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Re: Oh shit, wasn't looking, it
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I've yet to see a 3stage on ebay, unless I just havn't been looking. I've noticed LOTS of d15b vtec on ebay, but not the three stage vtec. IMO Japan made a mistake naming all of their engines with the same block code. It makes it very confusing after a while. |
I have seen quite a few 3
I have seen quite a few 3 stagers. One guy on h-t even bought one of them once.
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Por
Por ejemplo:
https://cgi.ebay.com/ebaymotors/JDM-D15B-SOHC-VTEC-CIVIC-Si-OBD2-1996-No-Reserve_W0QQcmdZViewItemQQcategoryZ33615QQitemZ805 4828365QQrdZ1 |
Re: Yo, what's up? I wonder what
Quote:
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That's amazzzing.
That's amazzzing.
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yes its exactly opposite of
yes its exactly opposite of putting a b-series in a hatch (civic...etc)...you use the mounts for the engine...the only difference any of the bolt hole spacings between integras and civics in this gen is ZERO !!! lol...the integras have beefier components...but they are all the same dimensions...
the only thing i had to do was use worm clamps on the water inlets b-series are bigger...and the civic spring clamps didn't fit over the integra hose... additonal features of the gsr are: front & rear swaybars front lower tie bar beefier springs (heavier motor) power windows/locks/mirrors/moonroof/cruise/rear-wiper much comfier seats w/ lumbar for the driver cabin lights above the rearview mirror and a chime if you leave the lights on also svoboy...your cx manifold may bolt on to a b7 motor but the ports are much smaller and may cause a negative effect as the air is about the enter the chamber possibly good outcome is more swirl atomizing fuel but it may be too much turbulence creating too big of a wall of air at the transiton right where the fuel is injected... worth a shot...but also maybe not the 3-stage is rated up around 50mph hwy or more it has the same intake as a d16y8/y5 with egr like the y5 what i'm getting at is that it uses a big (relative to cx/vx) throttle body but still achieves the mileage also it came stock with a 4.058 (think usdm dx/lx) tranny the cx/vx tranny is much taller gears at 3.25 using the b7 (dx/lx) tranny i have considerably better performance the cx/vx tranny was too long for the integra...i had acceleration problems however...my fuel mileage is exactly the same... i have had 2 different engines in the integra stock 3-stage (cx tranny had really bad ISB) couldn't break 35mpg and the blown b7 motor in there now...gets 30-35mpg all have had their problems while i get a good engine ready... i attribute the 3-stage directly to improper timing all the usdm 96+ civics call for 12° base i have an obd1 car using a chipped p28 with obd1 maps set at 16° which makes perfect sense in retrospect cant wait to get her back in... though i have another block combination i might try first...doh the y5 is the usdm civic hx which get about 42mpg - its a 1.6 L but has the vtec-e technology the y5 cam actually has more lift than the y8... but it uses roller rockers which probably offsets the ratio in the favor of more lift on the y8 the 3-stage has more lift (on the wild lobe) than the y8 as well but it doesn't use roller rockers... like all the other vtec d15b's it puts out 130ps (about 127hp) the same as the 1.6L engines...but peak comes in 200rpm below redline at 7000... for all practical purposes this engine is an economizer the wild rocker doesn't even ride on the lobe until vtec is actuated it is then held against the lobe from above and then all 3 rockers are held together by a fairly typical vtec mechanism pushing pins across each rocker locking them together yeah i took it apart if you guys want pictures...i've got plenty |
The cx manifold does indeed
The cx manifold does indeed fit, I'm about to post up some pictures in a success thread. I have though about the turbulence issue, and it has me a little worried or happy, who knows, but I think I will eventually go ahead and get a cx head and slap it on there before I do my full engine swap over to the vx.
Pictures! |
you know what i really wish
you know what i really wish i had pictures of
a night i got drunk at a bar in hanover coming out i stumbled into a huge crowd gathered to watch an hour long parade of naked freshmen make their way across campus :O thats where i'm from i actually used to sneak onto computers in their halls to surf the internet when i didn't have any for a while...lol dartmouth is great !!! here a pic from above of all the mechanisms for the intake side the actuator up top holds the middle rocker against the wild lobe https://users.adelphia.net/~digitalco...lvetrain07.jpg here's the first rocker coming off you can see the normal 16-valve vtec pin (closest) and the lower solid pin activates the 3rd stage https://users.adelphia.net/~digitalco...lvetrain08.jpg here is the egr cover that has 4 mini-runners to each intake port a good spot for injecting alternative fuels porting the main chamber https://users.adelphia.net/~digitalco.../egrcover4.jpg |
Haha, don't try to scare me
Haha, don't try to scare me off of darmouth now!
Very interesting EGR set up there, hmmmmmm. In any case, why is the turbo set to 0 psi? |
removes vacuum entirely from
removes vacuum entirely from the engine under all conditions
the skyline turbo uses ceramic ball bearings and a ceramic exhaust blade it should spool up fully well below my cruise speed of 2500rpm (about) with an external wastegate and a very light spring inside most of the exhaust gas is rerouted and boost pressure is maintained around zero psi the brief explanation an engine during vacuum (its entire operating range) has to work to pull air into the engine...it suffers from this work using a turbo generally adds alot air and therefore fuel... performance increases as does volumetric efficiency skyrockets the engine no longer has to work to get air in...and its actually being forced... unfortuneately to compensate all the air...fuel must be added... UNLESS... you simply dont add positive pressure...but eliminate vacuum zero psi is like when the car is off...there is still about 1bar of atmospheric pressure... you aren't adding EXTRA air to compromise air/fuel ratios you are just removing the pumping losses from the engine less wear & tear...less work ALOT of timing advance efficiency an open playing field for altering target a/f ratios |
So you're just chilling in
So you're just chilling in the WOT column 100% of the time?
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no i'm not ready to remove
no i'm not ready to remove my butterfly from the throttlebody just yet
though redesigning how our cars are controlled should be the goal there are plenty of other factors besides the air charge that could be more effective in controlling engine speed more specifically...fuel and spark... you shut of spark and fuel and the car slows down clearly the throttlebody at cruise is a hamper on efficiency cue the pulse & glide efforts...though i could never drive like that...how annoying...lol... there is a better way...and its likely split time fueling where up arond cruise you could theoretically hold WOT but only be injecting fuel and sparking every other its all theory of course...but yes...throttlebodies suck for efficiency at part throttle... the engine is more efficient at wot relative to normally aspirated car...yes..it would just above the wot column... though the physical throttleplate is still only part open |
Late as usual
I'm joining late as usual, but welcome! I'm stuck with a '98 Teg LS Automatic, 3-door, and I've been thinking D-Series for a while now. So, are you in school in Cleveland (I'm from Akron originally). I found your GSR in the Garage last week and was impressed. BTW, are you studying Physics?
RH77 |
i graduated HS in '93 and
i graduated HS in '93 and went to college in boston for electrical engineering for 2 semesters...
i left college because i thought i couldn't afford it... worse mistake i made (i later found out my father did the same thing...doh) i maintained a 3.4 gpa ... i barely started my 3rd semester but had all my books purchased for the entire year... i continued my education at home...and consider myself to have an associates degree...lol... i'd love to go back to school !!! definately do the d-series swap... though maybe you might want to wait and see that i can at least better 40mpg with one... i'm absolutely sure i can...but two non-ideal setups so far have been limited at 35mpg... weight reduction will be the key i'm trying to decide where i will live for next winter... and that will ultimately decide if i remove the abs brakes or not thats like 70lbs !!! but i wouldn't remove them if i move down south... |
wow 35 mpg but all that
wow 35 mpg but all that power on tap, super jealous.
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read some more of my
read some more of my posts...
nothing is installed yet... everything at this point is mathmatically crafted... no real world values the engine currently in my car has a blown headgasket at makes any passenger or nearby vehicle drivers nautions with coolant smoke and burns about 2-3 quarts of oil every week or so... also i stripped the timing belt tensioner bolt and the belt is too tight... the head is on the edge of seizing... hopefully i will swap this weekend... we will see what combination i end up with |
Re: i graduated HS in '93 and
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Quote:
Anyways, I'd probably get a project car for mileage since the B18's in great shape -- I just need to figure out how to get the best city mileage. The low Cd of the Teg lets the highway MPG even-out the city, but I keep getting an average of 31. RH77 |
ABS is not recommended for
ABS is not recommended for winter driving...
they lock up in snow & ice... currently my front axles are non-ABS...so its semi-disabled i'm with you on the poor average mileage the rear tailgate is a windcup and desperately needs diffusing there definately seems to be some kind of limiting factors though its probably not just one thing overall body weight small aerodynamic nuances that exponentiate like the recessed headlights, rear bumper cover (as mentioned)... i'm weighing heavily on doing a 99-00 front end conversion not really for uniqueness...too much of PIA for that... |
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