masterx69

Hello everyone. I have a D16Z6 and I was interested in upgrading some of the components on the engine. I am not sure if I plan on throwing turbo on it in the end though so I'll start with questions about compression. So I know up to a point higher compression allows for more power on normally asperated engines. Lower compression though is better for turbo's adn such. If I did go with higher compression what would be a good amount while not being to much if i was to turbo? Also I need a new tranny for it because the one I have is going out. What years and models of civic's and del sols offer automatic transmission that would work and what ones offer the best performance?

sde780

hondatragic trannys blow, convert to manual.

masterx69

I have considered that option. What exactly would I need to to the conversion?

jake 92eg d16z6

i have a d16z6 boost it those motors dont make power unless its runnin boost

jhammond_82

iTrader: (1)

check the faq out. some good info in there. i found this up there. info on an auto to manual conversion.

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/how-my-auto-manual-swap-pics-56k-no-no-2090074/
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/%5Bfaq%5D-official-parts-list-auto-manual-swap-eg-1316692/

masterx69

Ok wel now that we have covered a little on transmissions what info can people offer on the compression questions i had?

VEGAN_EG

go low compression with a turbo.
D-series engines love that
high compression on this motor will get a a 'little' power gain but will be more reliable.
low comp with a turbo will give you more power but less reliable

Frost7177

turbo that z6 run 10.1 compression and swap it for a manual trans use a y8 trans out of a 96-00 ex

masterx69

So what is the mosst effective way to attain the higher compression. I know i can go with new pistons but what else could i use to attain the 10.1 ratio? also does it matter if i am exact or would like 9.8 to 1 or like 10.4 to 1 be ok?

sde780

boost or nothing, youll hit a peak with the motor without throwing massive amts of money at it going n/a

masterx69

Also one of you mentioned a y8 tranny. would that be, in respect to connecting to the axles and engine pretty much bolt on? or would i need a kit to bolt i tto the engine or what?

VEGAN_EG

its a direct fit

VEGAN_EG

Boost = higher compression
Pistons can up compression
stroking/boring motor
shaving block and or head
thinner head gasket
etc
all things that effect compression

masterx69

So how much gain in hp could i get from just raising compression versus boosting as well as general costs?

jhammond_82

iTrader: (1)

just boost the stock engine. it'll be fine to about 220 hp.

sde780

Yeah, for the price if you want anything above 150 hp boost is the way to go

masterx69

so nothing morw then 150 unlesss bost. for just the high compression without a turbo how much would i need to spend to get the 150ish?

sde780

Machine work, high comp pistons, good IM, head work, tune.

Jimster480

You dont need to touch the internals to hit 150HP. A CAI, Header, Exhaust, Intake Manifold Gasket, Throttle Body Heater Bypass, some E3 Diamondfire Plugs and a tune can get you to 150HP. After all its only 23 more HP.

DONT go High Comp and then go turbo. It causes trouble when you want to boost. And the high comp pistons cost more than low comp ones since you can do a vitara setup in D series.

The Z6 has 9.2CR which is perfect for boost. If you want to bump it by a little bit then get a cometic headgasket and use the compression calculator to figure out how much the compression will increase with different size headgaskets.

crvtkllr

can the y8 tranny hold a fair amt of boost over the z6?

Jimster480

the D series trans all hold good power as long as they are manual. The auto ones hold **** power.

masterx69

Well I think I will go the route of increasing compression and through that slightly hp without a turbo.

Well I guess I better make a grocery list.

So as for a header can I expect a good amount of hp from low and mid range models or is it really worth the 400+ for the top end stuff?

Whats a CAI?

With exhaust I heard you can lower back pressure and that can cause a lowering of compression is this true? If so what systems are out there that dont reduce back pressure andwhat kind of hp increases can i expect?

Is it worth getting new fuell injectors? I heard you can increase hp as well as efficiency simultaniously.

How much trouble is a new cam and cam shaft and new pistons to install? Is it worth the time and money for parts on this engine?

92ehatch

i a high comp build isnt really worth the money.

by the time you spend 2000-3000 on internals and such, you could have done a low comp vitara build on 14psi and still saved money.

CAI = cold air intake +1 - 5 HP maybe

i forget who it was, but someone on here said this about exhaust flow.

its not back pressure, rather efficiency.

open your mouth wide and blow....not that great huh

now close your mouth and blow...doesnt work well either

now go in between...felt better didnt it?

exhaust is kinda like that. unless you are turbo (turbos like a freer flowing exhaust)

new fuel injectors on a D wont help any noticeable amount

cam and camshaft are easy installs on a D but need a tune to be effective. pistons are more complex.



now that i think ive answered the questions you had i will throw in my piece.

i have a d16z6 im building for boost.

i found a t3 .42 ar out of a mercedez 300d for 30 bucks, needs a rebuild +30 =$60
vitara pistons and rings- $125
forged rods - $270
DSM 450cc injectors - $60
bored and honed block - $80 (thats what they quoted me, i paid $30)

other miscellaneous stuff like
bearings, hoses, tubes, intercooler, BOV MAYBE $500 (at most)

total = $1190

that seems like a pretty sweet deal to me , mine is costing even less cause i found some extremely good deals

Jimster480

are you assembling the motor yourself? Your forgetting gaskets (especially headgasket which is $40), manifold, Wastegate, possibly a fuel pump (i have one on my 450s), Fuel Pressure Regulator, Chip and Tune on ECU, 3 Bar Map (if your going to run more than 10PSI), boost gauge, oil pressure gauge, gauge pod, ARP Bolts and Headstuds.

@OP Dont waste money on High Comp. Just do what I listed to get some more power out of your Motor in stock form. All motor on a D series will leave you with an empty pocket and alot of disapointment. If you really dont want the hassle of turbo you can always go Supercharged, it wont make as much power but its alot simpler.

92ehatch

that all falls under MISC (i couldnt list it all lol)

other miscellaneous stuff like
bearings, hoses, tubes, intercooler, BOV MAYBE $500 (at most)