D16Y8-Z6

Im running 7.5:1 compression.
Bone Stock D series.
z1 block y7 head, hf mani, 42/48, 2g DSM IC Front Mounted,
DSM 450's, 2.5 inch crushed dp and 3 inch piping after that.
Im running 11-12 psi now untuned.
Ive made plenty of 4th and 5th gear pulls on the dx trans and it hasnt blown.
Wondering if I should risk tuning it for 14 psi. I figure since it hasnt blown untuned on around 12, it should be able to take a bit more TUNED well.

Not many people have had any experience with this setup, so im basically in the dark on the limits of it.
BTW Ill be using a 2.5 bar map when I get tuned.

Any input would be appreciated.

96_civ

14 psi on a stock d? nope. you'll melt your pistons or throw a rod quick status, or definetely blow a headgasket. tops keep it 10-12psi on stock. forge internals. then up the boost later. but tune now for 10-12. (id say closer to 10 personally).

D16Y8-Z6

Why run 10 psi on 7.5:1 compression lol.
I might just stick with 12 psi.

B16CRXT

---- with 7:1 and a 42/48 turbo I'd do 15psi. that wont make much power, but make sure you have a good intercooler to cool those charge temps down.

EDIT: I tuned or 12 psi on a 10.2:1 compression and a bigger turbo stock motor and its fine. Just get a good tune and FMIC.

D16Y8-Z6

Thanks for the input.
I guess ill leave it up to what my tuner thinks I should do.
I dont plan on getting a fmic.
Im broke as it is, and had to scrape up the money for the tune.
What motor were you running 10:1 with 12 psi.
The z1 rods arent as thin as b7 rods, but not as thick as z6 rods.
Thats what scares me the most.

As the car strands now untuned it is faster than my last setup that ran 13.7 that was also untuned.
My goal is low 13's on this motor stock.
With 14 psi I think I can do that or better on street tires.

Anymore feedback would be great.

B16CRXT

its in a B16A (my current setup). You should worry more baout your pistons than your rods. get a good tune for 10-12 psi and I think you'd be fine, but on that small turbo and low compression I would run 15. You said you arent going to run an FMIC? are you going to be intercooled at all? If not, my advice is to wait until you get a good intercooler.

D16Y8-Z6

Ive been running the car the way it is for months now.
11-12 psi. Dsm ic front mounted.
If im running now not melting a piston, with God knows how shitty a AFR, I think it can do 14 tuned well.

Minor Threat

If I was in your shoes...

ASSuming you havn't been detonating due to a shitty timing situation, and your internals aren't fatigued, I would go read a compressor map for your turbo, find the most PSI you can run efficiently, then work your way up to there.

Make sure you're not detonating, that's the key. I would also look for other people making shittons of power off low compression D-series' because that's pretty much your setup.

Good luck, you better hit 12's soon...

Brett

D16Y8-Z6

Not many people go under 8.5:1 on D's so I have no resources.

But your advice sounded good.
Ive got to learn how to read a compressor map, and work from there.
BTW the only think holding me from 12's IMO is my Dx trans.
I feel I can go at LEAST low 13's when im tuned, I just might need that trans to break 12's.
But it could happen.

Thanks for the good advice.

stillnoturbo

15psi all the way! Go for the gold Joe I think with that low of a compression your pretty safe at 15 if not alil higher.