Br1anPham

Motor specs that would affect how high i can rev:
SOHC VTEC (d16z6)
built head on crower stage 3.
11.3:1 compression ratio, stock rods, stock D16a6 (very very similar to D16z6 rods, skinny as my cousins in vietnam.)
tuned.
ARP headstuds and rod bolts
How high can i possible rev until i hear half my rod rattling in my oil pan? I have a current fuel cut-off at 7,600. Thanks for any input.



Modified by Br1anPham at 9:24 PM 9/25/2004

Devine

Im not sure what the limits would be but im sure your safe going over 7600, hell i rev my turbo d15b(stock) to 7800 with no worries. id say dont go past 8500 just to be on the safe side.

Jimmy

iTrader: (5)

What valve springs are you using?

Revolver

Why don't you get on the dyno and find out if it's even worth it to rev that high? Chances are good that it's not. Or are you one of the types that wants to rev high just because you think it's cool?

ABK

dyno won't tell you if you are about to throw a rod, or drop a valve.

silverEH2

9k

Revolver

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ABK &raquo;</TD></TR><TR><TD CLASS="quote">dyno won't tell you if you are about to throw a rod, or drop a valve.</TD></TR></TABLE>Dyno will tell you if it's beneficial or not.

ABK

really? The most dyno will tell you is that your motor stopped making power, due to the valve float or do the fact that you can't squeeze anymore air in there to make power. It won't tell you if you are about to punch a hole in your block, or your valve is about to drop.

Plus due to the fact that d series engine got heavy and not teribly balanced vavle train I wouldn't take it past 8 grand.

BeerBaron105

u can never rev as high as my stock b16 muwhaha

ABK

I took a jdm d15b to 8500-8700 once, I'm suprised it didn't blow up, but it smelled pretty nasty, lol

1ntensiveVTECivic

7,800 on d15'rods, but i wouldnt push it after 7,800 with rods and valvetrain,so on d16 which has stronger rods it should hold up to like -8,500 max, but i know z6/y8 valve springs hold up to 9,200k.

EJ8 D15Y8

People who have no experience at all should all shut up.

From my experience. 8k is definately too much.
The rods wont snap, but they will bend.
This doesnt happen as soon as you grab 8k.
Its after the abuse of it.
I say get it dynoed (yes that was a good idea).
See where it stops making power. And if its around 8k, only run that at the strip.

I spun a bearing in a Y8 from a few months of 8k. And I did the same on a z6 in about the same amount of time.

My new rev limit is 7600. On a d15 bottom end.
It seems to be a lot safer.

Oh btw, keep the oil TOPPED OFF !!!!!!
Thats the most important part.

Br1anPham

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jimmy &raquo;</TD></TR><TR><TD CLASS="quote">What valve springs are you using?</TD></TR></TABLE>
Supertech valve springs and ti-retainers.<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BeerBaron105 &raquo;</TD></TR><TR><TD CLASS="quote">u can never rev as high as my stock b16 muwhaha</TD></TR></TABLE>
Nope; not now, but never say never.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Revolver &raquo;</TD></TR><TR><TD CLASS="quote">Why don't you get on the dyno and find out if it's even worth it to rev that high? Chances are good that it's not. Or are you one of the types that wants to rev high just because you think it's cool?</TD></TR></TABLE>
Crower stage 3; supposeidly a high revving cam, on their site it states 8000+
On the butt dyno it still continue to pull , but i gotta shift at 7500, before i hit my limiter at 7600. Don't be too quick to judge.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ8 D15Y8 &raquo;</TD></TR><TR><TD CLASS="quote">People who have no experience at all should all shut up.

From my experience. 8k is definately too much.
The rods wont snap, but they will bend.
This doesnt happen as soon as you grab 8k.
Its after the abuse of it.
I say get it dynoed (yes that was a good idea).
See where it stops making power. And if its around 8k, only run that at the strip.

I spun a bearing in a Y8 from a few months of 8k. And I did the same on a z6 in about the same amount of time.

My new rev limit is 7600. On a d15 bottom end.
It seems to be a lot safer.

Oh btw, keep the oil TOPPED OFF !!!!!!
Thats the most important part.</TD></TR></TABLE>

Thanks for the great information. Looks liek im keeping the limiter at 7,600 until i get some H-beams.

Spun bearings are not result of rods are they? When i Blueprinted, i decided to get my bearings a little loose; but within tolerence. If we were to get stronger rods, would we still be spinning bearings?

And please provide me with more information with bent rods. How long we're you abusing it before you notice the bent rods?


Thanks everyone for their input.

MassScene

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ABK &raquo;</TD></TR><TR><TD CLASS="quote">dyno won't tell you if you are about to throw a rod, or drop a valve.</TD></TR></TABLE> But it will tell you if your making power above 7600...... if your not dont go there.

EJ8 D15Y8

Bending a rod makes the rod uneven, causing a bearing to spin because the rod isnt straight anymore.

IMO the H beams should take care of the spun rod situations with D series, as long as enough oil is being supplied.

I was driving at 8k DAILY in the y8 for a few months. And the same on a rebuilt z6 block.
But I mean I was CONSTANTLY at 8k. Meaning top of 4th gear everyday. BAD abuse.

One day I had just finished racing a friend, got off the highway, got back on and I started to hear a SLIGHT knock, acccompanied by a whining noise, by the time I got home 15 mins later it started to stall and then seized.

Br1anPham

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ8 D15Y8 &raquo;</TD></TR><TR><TD CLASS="quote">Bending a rod makes the rod uneven, causing a bearing to spin because the rod isnt straight anymore.

IMO the H beams should take care of the spun rod situations with D series, as long as enough oil is being supplied.

I was driving at 8k DAILY in the y8 for a few months. And the same on a rebuilt z6 block.
But I mean I was CONSTANTLY at 8k. Meaning top of 4th gear everyday. BAD abuse.

One day I had just finished racing a friend, got off the highway, got back on and I started to hear a SLIGHT knock, acccompanied by a whining noise, by the time I got home 15 mins later it started to stall and then seized.</TD></TR></TABLE>

Thats not good at all. Thanks for sharing the experience. Its time to start saving for a nice bottom end.

SpoolinEK9

i had a d16 that i was getting rid of and revd to like 8 sometimes and when it finally gave out it was the valves 2 of them just snapped in half