Supra TT pistons + B16a Rods = D16A6
 

Ok. is there any mods other then notching the block?

Where can I get a set of 6 Supra TT pistons?

THX guys

post your views on doing this here

Re:Supra TT pistons + B16a Rods = D16A6
 

i wanna look into that also.

your best bet would be on a supra forum to find the pistons..

Re:Supra TT pistons + B16a Rods = D16A6
 

Ya no supra TT at pick your part haha

any idea on how much new from dealer?

Re:Supra TT pistons + B16a Rods = D16A6
 

o jesus. i dont wanna know.

Re:Supra TT pistons + B16a Rods = D16A6
 

ya true

Re:Supra TT pistons + B16a Rods = D16A6
 

http://www.honda-tech.com/zerothread?id=267641 go there

Later,
Derek

Re:Supra TT pistons + B16a Rods = D16A6
 

b16 rods will not fit on a a6 crank with out machine work just so you know.

Beau

Re:Supra TT pistons + B16a Rods = D16A6
 

guy sed u use b16a bearings and they fit..
who do i believe ???

Re:Supra TT pistons + B16a Rods = D16A6
 

you sure? He said that the b16a bearings if used will fit the d series crank with out modifications....


Who knows

Re:Supra TT pistons + B16a Rods = D16A6
 

No B-series rod will fit in the d16's without mods, you will need to take them to the machine shop and get a rods resized and a new bushing's for the wrist pin, Its about an 80-120 buck job if I remember correctly.

Jeff

Re:Supra TT pistons + B16a Rods = D16A6
 

Do you remeber what all was involved....

Re:Supra TT pistons + B16a Rods = D16A6
 

the rods are machined and modified. the guy that sells this sells them as a kit.. new or used and allready machined to fit.

the berings also needs to be modified in order to fit.

i am thinking of getting this for quite some time, still need to find out how much the b16 bearings cost and how much to make them fit.

(read the entire thread)

Re:Supra TT pistons + B16a Rods = D16A6
 

I did. I can get the stuff he is selling for over 1/4 cost off. So I rather find out whats involed and get it machined by a friend and have it done for 125 cdn instaed of 500 + US
make sence?

Re:Supra TT pistons + B16a Rods = D16A6
 

hell yes... keep us posted then.. cuz i want to go that route.

once u get it up and running and if ur up for it i can get a set from you.. ;D $$

Re:Supra TT pistons + B16a Rods = D16A6
 

yeah imma save up and find some parts.. i got other priority's arghhhhh

hey tory. i think ill drive up tuesday if i cant find one the junkyard.

Re:Supra TT pistons + B16a Rods = D16A6
 

ok thats cool . I got school on tuesday from 9-11:30 so just give me a ring at like 1 and well go get the tranny....

Re:Supra TT pistons + B16a Rods = D16A6
 

wurd

Re:Supra TT pistons + B16a Rods = D16A6
 

when you use b16 rods.. you have to notch the block so the pistons when connected to the crank will rotate 360 degrees... its not hard to do.. look on the endyn site they tell u how to do it... also u can use ls rods with d series pistons... no machine work involved... they are 2 times as strong as the d16... they will only work on d16 .. no d15...

Re:Supra TT pistons + B16a Rods = D16A6
 

Re:Supra TT pistons + B16a Rods = D16A6
 

Ok cool so does this rod fit to the piston both D series and Supra TT?

Or does it have to be machined there to?

THX

Re:Supra TT pistons + B16a Rods = D16A6
 

teh rods are from a b16.. and yes they need to be machines.
the pistons are fom the TT and they will fit 100%

Re:Supra TT pistons + B16a Rods = D16A6
 

I don't know if anyone has mentioned this, but the 1g-gte was used in mid to late 80's jdm supras and soarers (I believe they were 2.0 liters). They aren't from the US market twin turbo which is the 2jz-gte, so the 1g-gte pistons may be more difficult to find than anticipated. Hope this helps and good luck! :)

Re:Supra TT pistons + B16a Rods = D16A6
 

Before anyone does this, be aware the compression will be horrendously low on a d16a6 (crx/civic).

I calculated it as below 8:1!!!! This will make the engine limp until at least some boost kicks in.

The pistons will not go as high in the cylinder as stock so the compression will be real low. The stroke length is still the same (bottom of the stroke is lower than stock).

Re:Supra TT pistons + B16a Rods = D16A6
 

Mind sheding some light? I would like to see the numbers..

what are the size of the B16a rods, compared to the A6 rods?

Jeff

Re:Supra TT pistons + B16a Rods = D16A6
 

the compression height of the piston is important too, find out how far it is from the center of the wristpin bore to the top of the piston. you could have the machine shop deck the block some to reduce compression, but this can affect valve timing, and piston to valve clkearance can be an issue as well.

Re:Supra TT pistons + B16a Rods = D16A6
 

When I first started looking at this setup, "TurboPanda" (I think he changed his name since) said the pistons stop 1mm lower than stock from the top of the cylinder at TDC.

This takes wrist pins and such out of the equation. Basically this adds 1mm worth of cylinder volume extra to the "compressed" side of the ratio.

I wish I kept the numbers, but I was shocked. If people have any ratios on adding 1mm thicker than stock head gasket, the result should be the same I think.

Considering a d16a6 starts out with 9.1:1, It's probably not a great idea to lower compression any more.

I will try to recalc the numbers.

John

Re:Supra TT pistons + B16a Rods = D16A6
 

it isnt quite the same because the piston dish may not be the same volume, as well as the valve reliefs. you will need that measurement as well to calculate the compression correctly

Re:Supra TT pistons + B16a Rods = D16A6
 

jthelman

you said that it adds 1mm to the compressed volume, but it also adds it to the uncompressed volume of the cylinder.you probably know this, but i just want to make sure you didnt miscalculate

Re:Supra TT pistons + B16a Rods = D16A6
 

Do we know valve reliefs will accomplite the d16a6 valve train if the head was deked the .5 mm and block .5 it would make nice clean mating surfaces...

Re:Supra TT pistons + B16a Rods = D16A6
 

okay, i did some quick calculation,
assuming that the bore is 87 mm(stock)
the displacement of 1 cyl is 399.25cc(1597/4)
and a 49cc uncompressed volume would yeild 9.14:1 CR
adding 5.9cc(the 1 mm difference) to both compressed and uncompressed volumes equals
8.27:1 CR
low, but a good ratio for cheap fuel system upgrades and really high boost. i think its a good setup.
if the block was decked .25mmand the head was decked .25 mm the Compression would be 8.7:1, and those deck heights would deffinitely be acceptable if the engine was clayed to check piston to valve clearance,
valve timing would be altered a couple of degrees, but nothing an adjustable cam sprocket cant accomodate for.
that sounds like some old school ingenuity to me.
let me know if anyone can find more accurate numbers or if i screwed up, which isn't too unlikely

Re:Supra TT pistons + B16a Rods = D16A6
 

That looks good to me.

Ya the thing would be get your block and head clayed. haha Breaking valves isnt cool.

Ok so what we got here Is:

8.7:1 compression ratio is sweet for turbo.

Deck the head and block 20mm - 25mm(providing adequate clearence) to clean it all up and get 2 good mating surfaces. This will also bring the compression ratio up from the previous stated 8.27:1

This setup will yield not much loss over stock off the line but much higher boost capabilities.


Now:


b16 rods or b18 rods? What is the tensile strentgh on each How much stress can they take before they snap like twigs?

This is assuming you megnaflux them and shotpeen the rods.

Are there good high quality rings avaiable for the supra TT piston?

This forum is pumping keep it up a lot of good info here...


Mods... Are we starting an acrchive or snyhting like that? If not I would think I will have to.

Re:Supra TT pistons + B16a Rods = D16A6
 

Re:Supra TT pistons + B16a Rods = D16A6
 

yeah guys. im just thinking..
all that work for nothing really
who makes some nice beefy D series rods..

Re:Supra TT pistons + B16a Rods = D16A6
 

https://www.homemadeturbo.com/misc/eagle.jpg

What like 375 for eagle rods? and about 650 for Crowers.

Jeff

Re:Supra TT pistons + B16a Rods = D16A6
 

375 aint bad at all..

Re:Supra TT pistons + B16a Rods = D16A6
 

WTF?

Let me get this straight.

You buy used pistons, and somewhat beefier OEM rods for $400. You then deck block to get the compression back to what I still consider a low 8.7:1 (machine work -- $$$). You then hope like hell that the tensioner can suck up that much slack. We then have to buy timing gears ($$$) dyno time ($$$) and screw around to get timing right.

Explain to me why it isn't worth doing this the right way with SRPs + Eagle rods for about $900? You get a non rigged setup that can handle way more abuse than a bunch of used and cobbled parts.

BTW: I figure dropping that extra .4 on the compression will kill off about 10 HP. On an engine that produces ~108HP, this is a nice drop. Yes, you get it back, but not until boost kicks in.

John

Re:Supra TT pistons + B16a Rods = D16A6
 

read the provided thread entirelly..
this is a condensed info about it.

there is a guy that has a d16y8 boosting over 1 bar (14psi)that uses 'used' tt pistons and b16 rods that are machined and put together in order to work. along with this he uses a block guard. he claims that there is a 1mm less in height lowering the compression from stock.

Only thing needed next is a b16 bering that also needs to be machined in order to fit into the D bottom end. machined deck is not necesary, only if u want to increase compression. I think you could use a thinner head gasket if u want to increase compresion.

i dunno how much bearing cost and shouldnt be much to make it fit.

originally this setup is intended for people on a tight budget that 'only' wants to boost safely no more than 1.3bar (18psi)

and yes, you need tunning to make anything work.. hondata/zydane,etc