d16y7 build project

[krkline2gdsm]

I have a 97 civic DX y7 head with a 5speed tranny. Brought it to the track, pulled of a 16.5 and I didnt even launch it. So the way it sits, its slow regardless. Now before I get going, I want to say I am not trying to build a hot rod. I would love to just pull 14s reliable and call it a day.

I have done alot of searching and alot of reading. Alot of good knowledge here and on other forums but seen as how this is a dedicated D16 forum, I will post my ideas up here.

I wanted to try to leave the block installed inside the car but it seems that is not happening. This will be an NA car with the possibility of me breaking out my dsm turbo stuff out of the garage and possibly bolting up a t25 turbo but that comes later down the road. I am specifcaly aiming towards the build of the motor. No I will not be putting a 50trim or 57trim t3/t4 on it later so I would like to keep the compression in the 9s

I was looking at doing a Y8 head swap giving me a 9.96:1 compression. Swapping the head, ECU, intake manifold, and TB. I am now looking for pistons. I want to keep the stock bore and leave the block inside the car but again, it seems removing the block to do the work correct way seems to be ideal. I am a HUGE fan of eagle rods. Taking suggestions on piston/rod combo as well as rings and bearings. I plan to stick with the stock crank. Not sure if I should sleeve the block or just use block gaurds. As far as tuning, I want to use just a V-AFC. No need for crome, hondata, aem, etc. I know tuning is key but I do not plan to change that much other than raising compression and maybe boost 8psi down the road after the build. probably a wally 190 with 240cc injectors and when I boost, 450cc injectors. As far as the valve train, I will do a light port of the y8 head, 3 angle valve job, new seals, possibly a bigger cam and better spring/retainers. I am trying to keep this 100% daily driven and it must pass insection with OBDII so nothing extreme. I am sure you guys have questions for me so I look forward to the help and opinions.

BTW: No I will not be using vitara pistons. I am not about doing things cheap

[krkline2gdsm]

After doing a little homework, I decided to keep the stock bore as long as the walls look good (which I am sure they will) thus leaving the block installed during the build

SRP pistons (149205) standard bore, 10:5.1 compression (y8 head swap giving me a 10:8.1 compression) with the ring set JXCOF4-2953-2

Eagle rods (CRS5394H3D) H beam

Now I wasnt sure if this kind of compression would be to much to boost 8psi from a T25 turbo later down the road. Its possibly yes but I am going to be using a Vafc to tune as I cannot get rid of OBDII for inspection reasons. Any suggestions?

[Belette]

No need of y8 head. You can do the same with y7 one. Make some research about y7 project. Vtec is nice but not the key of heavens. Most of drag racing cars haven't vtec and they do well ;)

I ever see a 414whp turbo d16y7 on a web site. Darn good :)

Turbo and vtec together are harder to tune and when yuo reach high torque and hp range, and harder to drive and controle the car when vtec kicks, non vtec is easier to forecast which reaction engine/car could have.

My friend got a turbo h22 with 370whp and more than 300tq. When vtec kicks, it's insane how the car wants to go everywhere and spins tires. Another guy I know have similar setup with non vtec F22. little bit lower whp (335whp) but have the same tq, and the car is erally easier to drive when boost. No kicks, it's 'smoother' linear acceleration.

[93civiccx]

14's is actually pretty easy to accomplish with a few bolt ons and some pistons. Reasearch. Alot of people are running 14's just by swapping pistons and little things like that. A good start would be an ex/si tranny to get a little lower gearing. Look at transzex's car or bigtuna's car.

[Belette]

14's is actually pretty easy to accomplish with a few bolt ons and some pistons. Reasearch. Alot of people are running 14's just by swapping pistons and little things like that. A good start would be an ex/si tranny to get a little lower gearing. Look at transzex's car or bigtuna's car.

It depends from many thing to turn into 14. Car weight and drivers do much. Tem perature, elevation, atmospheric pressure, wind, and much more. You can turn 14 at your home, and here you can turn 15. Nothing is the same.

[93civiccx]

Very true, but generally speaking you don't need boost. It would be the easiest way though. Just bolt it on and go. If I had some turbo stuff layin around, I'd put it on.

[Misfit]

im start5ing a y7 turbo build. vtec on a d series is pointless. fuel economy only. just my two cents. look into putting a turbo on that thing soon and work on building a block to switch all your turbo goodies onto later.

[Belette]

yeah, I'm building n/a y7, and I'll take it on dyno after maybe this next summer. Head work should be completed this spring, and strenghtened block in the next year who will receive some nitrous shot :)

[Misfit]

yeah, I'm building n/a y7, and I'll take it on dyno after maybe this next summer. Head work should be completed this spring, and strenghtened block in the next year who will receive some nitrous shot :)

go turbo man, never have to refill that bottle. hehe

[1990reds13]

would swapping an SI tranny into a car with the d16y8, an ex civic, make that big of a difference? sorry i'm not trying to jack the thread, but i saw someone posted that and was just wondering how much it would actually help out

[Belette]

go turbo man, never have to refill that bottle. hehe

I don't want to go turbo. I like N/A setup with nitrous :)

[moesho]

i want to do a mini me swap is any1 posting the y8 head, tb,im, and ecu?

[20civic00]

you deffinately dont need to swap a y8 head on, just build what you have. if you dont go turbo then look into some machine work and porting the head. be sure to get a good tune with high compression pistons, its not too fun when you blow your motor.

[Dibble]

I'll tell you how to get to 14s

22inc slicks, IHE, and leave on the wood.
14s all day untill the clutch gives out.

Thank you and come again.

[Compaq888]

I don't want to go turbo. I like N/A setup with nitrous :)

NA and nitrous sucks. I went through a bottle every 2 weeks. It's only good for a couple seconds, after that the fun is over.

[Belette]

But the fun is hard when you shot :)

[Compaq888]

But the fun is hard when you shot :)


torque steer is a bitch. A torquey motor+ a big shot= a lot of torque steer. It's better to have turbo, fun all the time.

[Belette]

torque steer is a bitch. A torquey motor+ a big shot= a lot of torque steer. It's better to have turbo, fun all the time.

If you can't handle 50-100nitrous shot, buy an old horse and take a smooth ride in valley of love.

[20civic00]

If you can't handle 50-100nitrous shot, buy an old horse and take a smooth ride in valley of love.

haha what the heck?

[Belette]

haha what the heck?

If I can't handle my car with some nitrous shot (I ever had one with 100 shot without power steering) I'd be better to sell it right now. The same for him. Ho no, I'll need traction bar and helmet to handle it.

[dkid15]

Thats like when i see people asking if they should get a stage 3 clutch and rollcage when they're running 16's.

[Drows]

I have a y7 too...
Sometime I think it would be simplier just to change it to a Z6 or something (mine is in a CRX). Going with the y8 is tempting, but that only the head, puting some delta 260 would change the mpg that much and it would give better performance... But then again...

[SpoolinSol]

i'm suprised nobody mentioned this yet, but; you WILL have to take the block out. You have to notch the block for aftermarket rods to fit, so after you grind the material off, you will have to have the motor out of the car to clean the block... IMO you should get your CR at least in the 10's....

[dkid15]

Mini me y7= more money than delta regrind, but better fuel economy and about same performance.

[civicex442]

boost boost boost boost boost! if you have the stuff, do it.