Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here!!!
 

ok .. here it is .. im a planing a budget buils, and i here alot of do this and do that or dont do this . blah blah blah .... i here dont turbo a mini me the compression will be too high ... ok ... whatever ....

what ive got is a spare d15b2 block .... seems to be in good condition .... no scoring on the walls .... now acording the the knology d sereis compression calculater, by using the d15b2 block, with the z6 head, and the y8 head gasket it should yeild about a 10.1:1 CR .. is this true???

now why would people say this is too high a CR to run some good boost on??? people buy jdm b16's and run 8 psi with 10.4:1 CR all day long .....

so basicaly what i want to know is can i run about 8-10 pounds safley with this setup with a little tunning??? its going to be a junkyard kit by the way, most likely a 14b turbo, hf mani, with a nice starion IC...

what kind of fuel managment will i need to run that kind of boost??? can i get away with just using some 440cc injectors, vafc, colder plugs???.. this is in a 92 hatch by the way.. will i need to upgrade my fuel pump??? i have a spare gsr fuel pump, would that pump enough, and with the increased pumping an i going to need a FPR????

basicaly i want to use the mini me, cause i know with the slightly higher compression, and a little tunning this little 1.5 has the potention to rip hard... and id like to actualy pull some 13's out of it ....

so what do you all think .... shoot me some ideas and suggestions and knoledge please!!!!!

Joe

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

you will be fine with 10.1 compression. I think you should buy a d16 block d15 are so weak. for fuel go with uberdata and some 450's you dont need a fuel pump but if your car has a lot of miles its good to buy a new one.
steve

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

wish i could post a pict of my d15b2 that blew up under 10 psi, it had dpfi on it but i had 2 extra fuel pumps and a 440cc injector dummping into the intake /secondary kicked it in.. but anyways, have you ever went to a restraunt and ordered oinon peels for starter.. well my piston looked like that, it melted the rings to it and the edges started flaking off in big chunks and it spun all the rod bearings..
the car ran great until denation.. not i have a d16a6 SI turbo.. i was thinking about a mini me turbo. but roumer has it there too high compression and alot of trouble due to overheating.. cause the d15b1 and 2, and d16a6 blocks do not have a good heat sink.. im trying to get info too. but my d16a6 scoots under 8psi.. oh yea get a Apex-i SAFC for fuel managment it works great

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

and y do u day the 1.5's are week??? i head they could take a pretty good beating??? what would make them weaker than the 1.6L'S???

i will use the 1.5l right now, cause its what i have laying around ... i have a spare one, and i dont care if it blows.... allthough i dont want it to blow, cause i dont want to damage the head....

plus one set of my friends are all about big displacment .. blah blah blah ... i want to show them what a little 1.5 can do.......

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

The d15 rods are the weak point d16 rods are a little better butt still not great. d15's can take a good beating but just cant take a lot of power, they have better R/S ratios so they probably will last longer than a d16 just at a lower boost level.
steve

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

D15 crank (main) journals are also half the size of a D16. I'd start with the D16

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

d15 suck balls. i blew two in about 2 weeks. i dunno i just couldmt make them handle boost. one got raped and the other didnt even take 9psi with the stock head! i dont know i just wont be messing with d15's anymore. i was using 450cc injectors afc and msd btm.

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

did u blow em do to detonation or mechanical failure ....

i mean, i have the block just laying around, i figure i might as well try it out right??? if ti blows i put on a d16 bottom ....

u think i could get away reliably with the mini me 1.5 and keep her at only 8psi then??? maybe a quick trip to the dyno to have the vafc tuned real nice???

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

For the price you can pick up a d16 block, why don't you start with it? You're welcome to build this one up but I think you will grow tired of it or break it (whichever comes first).

All about the tuning.

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

well, u may be right, i may grow tired of it, or i may break it ... but, its not going to be my daily driver, and sice i dont have money to play with cars in the big game right now, if i break it at least i get to have some fun putting it back together again ....

really, my main concern is damaging the head..... if i blow the motor what is the chance of me fuckgin up the head???? i know theres always a good chance of it happenind wit detonation, but what about if its a mechanical breakdown???

also, what exactly happens when you "spin" a bearing????

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

also, anyone know what kind of tricks Jeff did to get his 1.5 mini turbo to run so good???? anyone know how long he was running it and if he blew it up in the end??? cause his num,bers are nice ... 13.5@102+ isnt too shabby!

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

i love how everyones inability to tune, turns in to "the d15 is ----"

someone mentioned he blew up a piston, and broke rings. thats because you cant tune, and had nothing to do with the engine itself, the pistons and rings are the same meterial as the d16.
the main and rod journals are smaller. i believe the mains are 45mm instead of 55, and the rod journals are like 3mm smaller.
again, the crank is not a weak spot. find me a d15 where the crank broke before the stock rods. hell if this is the case, people better start throwing out their JDM d15b's, becasue they are crap.
the weak point is the rods. but they should be fine up to 180 whp or so. with a decent tune.

i have been beating the living ---- out of my d15/y8 mini me for the last month or so, trying to break it.
last compression test from 2 days ago
198 205 205 205
8psi daily

maybe i got the only d15 honda made that didnt suck...

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

i love hearing this ----!!!! tuning!! yes!!! ok .... keep em coming .. i want to hear all angles!!!!

and again, what happens when you "spin" a bearing?

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

bump for some more replies!!!!

now im considering maybe just boosting the straight up 1.5 motor to get a good handle of the tuning a bit, and get all my ---- fabbed up nicely, and while im running that motor look for a 1.6 soch vtec for a good price......

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

its all about tuning and boosting an engine in good conditions.

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

i fully belive in tuning .. i will most def. take a trip to the dyno..... it should take long to tune a simple litle setup like this should it??? maybe 5 pulls??? what to u guys think .... im not gonna sit there and fight for power, just setup so i run safe....

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

to answer your question, a spun bearing could mean all sorts of things.

The lightest would be hearing a knock from your motor. The heaviest would be throwing a rod out the side of the block.

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

thank you!, and we are talking about the main bearings???? im sorry to burden you all with questions ... but im trying to lean more ...

so does this term just refer to a bearing that is worn, causeing the crank to not be stable???? or does the bearing actualy move out of place????

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

it's cool man, you gotta learn sometime.

Different motors use different parts but in general they are all the same concept of flow. This is what a typical bearing looks like:
http://www.powerheadkit.com/images/DSCN2102.JPG

but I think you're thinking of something more along the lines of this:
http://www.mopartsracing.com/parts/hemi/mainbset.jpg

Those things get wear with milage, and after a while they can break apart.. cause a knock or as bad as a thrown rod if not treated or abused

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

cool! thanks for the info, so the bearings in the bottom picture are like honda bearings right????

how to you install/ remove them???? do they kinda just sit on the crank jurnals or to u have to fasten them somehow??? are the hard to remove and install???

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

Guess whos back?

OK, well they are inside the rods, and then the bottom part of the rod gets bolted to the top. My friend's car spun a bearing, and he heard the knock, and turned the car off, within 2 secs!!, and then when he took the motor apart, the bearing melted to the rod!! And it fucked up his Crank!

To install you got to take the rods off, and undo the two rod bolts, then take off.

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

i know there are rod bearings, but arent there main crank bearing as well ... where the crank lays in the jurnals??? which bearings are the ones to fail usualy???

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

I dont think so?? But i havent taken my block apart yet!! Cant get that damn Crank pulley off!! >:(

Im not a expert

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

i have a ~160k d15b2 converted to mpfi. it's been turboed since last december. no problems so far.

setup is: t25 @ 8-9psi, 3degrees retard, 1step colder plugs, afc, dsm 450s, dsm bov, johnnyracecar intercooler, stock but new fuel pump, untuned but erred rich side. i dont care if it blows up, but im not going to deliberately make it happen. i did compression check recently and it was all even across.

Re:Building a 1.5L Mini Me Turbo!!!! ....bring your wisdon and experiece in here
 

so is the 1.5 vtec from japan a good engine to boost ?? or not ?? dealing with same issuse's i figure ?