Da9 Intake sound.

[gumbs]

I recently swapped over from a mildly worked v6 commo to a DA9 I boguht it off an auction house so I don't know whats been done to it (apart from the obvious stuff)

Well thsi was my first manual and front wheel drive and I'm only just starting to get the hang of it and I''m starting to drive it reasonably hard.

When I get up to around 4.5k i start to get a bit of a high pitched whine and it gets progressively louder until its dorwning otu a fiar bit of the engine noise at the redline.

Is this normal for a DA9 I've never had anything to do with high reving jap 4s before and I've never heard a noise like this come out of a big 6 or 8. Any advice to what it is would be nice.

Intake is the standard airbox with a k&n panel in it ( I think its got K&n stickers on the box) and the exhaust is stock.

Also wheres the rev limiter at on a DA9 and whats the best shift point.

[FR33K]

Also wheres the rev limiter at on a DA9 and whats the best shift point.

why dont you try and find it ;)

from memory its about 7000 - 7100 rpm

[IN73GZ]

maybe for a b16a andrew, i dont know about a b18a or b18b, prob around 6600rpm

[integral90]

well, the da9 (with b18a) redlines at about 6600rpm, so i'd say around 6900rpm would be your best bet.

so gumbs, has the car still got a resonator? or has it got cold air induction up to the panel?

[__arjay__]

6900rpm is best shift point?

I thort it was 6300rpm... HmmmMmMmmmmm

Something about the car doesnt gain any more power after 6300rpm :confused:

[FR33K]

maybe for a b16a andrew, i dont know about a b18a or b18b, prob around 6600rpm
i was talking about the rev limiter not the redline

[SKREMN]

i think fule cuts out at 6900 or just about b4 7000

[locote]

i havent hit my rev limiter on my GSi yet and i always take it to redline when i give it to it.

[BIG`O]

i havent hit my rev limiter on my GSi yet and i always take it to redline when i give it to it.

my gsi rev limits at 7300 - found that out on the skidpan :)
optimum shifiting i have fount at about 6900.

this is the b18b2 though - b18a would be different.

anyway back on topic - it would be normal. what year is it out of curiosity? i know the 93 LS's came with the b18b. check you engine code (stamped on the drivers side near the standard headers)

[gumbs]

Yep she's a 89 BA18A1. And what do you mean by a resonator. Shes got what I'm assuming to be the standard DA9 cold air intake (my DA7 quater cut had the same intake on it) attached to a K&n airbox.

I don't particularly want to go and slap the rev limiter I'd rather just know where it is. I guess around 7000 seems to be consensus and I'll stick with around 6500 as a shift point until I take to the track to do some proper testing.

[integral90]

Yep she's a 89 BA18A1. And what do you mean by a resonator. Shes got what I'm assuming to be the standard DA9 cold air intake (my DA7 quater cut had the same intake on it) attached to a K&n airbox.


da9's don't come with cold air intake, just the stock one (which is SRI style). the resonator is the bit of piping you will find next to the latch for the hood, its a bit of piping that runs air to the airbox.

[string]

The 92/93 Teg's had the OBD1 B18A1 which redlined at 6800rpm and rev-limiter is at 7200rpm.

Best shift point is going to be very close to, if not on the rev limiter.

[FR33K]

da9's don't come with cold air intake, just the stock one (which is SRI style). the resonator is the bit of piping you will find next to the latch for the hood, its a bit of piping that runs air to the airbox.
there is also another resonator that you will find behind ur front bar in ur wheel arch..

[ewendc2r]

CAI often give a whistle noise when above 4000rpm on B series motors. Don't know why.

[Zilli]

CAI often give a whistle noise when above 4000rpm on B series motors. Don't know why.

this is true... but only on partial throttle openings, like a 1/4

on WOT its too loug for me to notice if there a whistle

hehe

[BIG`O]

this is true... but only on partial throttle openings, like a 1/4

on WOT its too loug for me to notice if there a whistle

hehe

werd :wave:

[LO_N_SXC]

Funny thing is that the tone of my engine also changes from 4000rpm + but it dont have a high pitched sound like that, tends to sound more like Vtec, which is funny coz everyone that hears it rekons it's Vtec..

[Cold Fusion]

maybe secret vtec valve :P

[Spoon DA9R]

Funny thing is that the tone of my engine also changes from 4000rpm + but it dont have a high pitched sound like that, tends to sound more like Vtec, which is funny coz everyone that hears it rekons it's Vtec..

i witnessed that vtec sound....i was in it a few weeks ago.....its still pretty quick though...even without vtec...

[SKREMN]

witht he stock box but no resonator and a K&N filter when i would rev it out in nutral and then let off it would make a bov like sound people used to think it was turbo
whhooooooccchheeee it would go

[Spoon DA9R]

i use to have the bov sound coming outta my buddy club spec II exhaust too when i change gear at 3500rpm...coz my silencer was bend hahahaha...

[preludacris]

hrmm

in my old civic 91, i would also get a kinda whistling sound after like 4k ... but that was a dual carby ..

i dunno , the engine is from the same era as my old civic , so yeah i think its normal , even tho urs is efi ..

i like the sound anwayz , honda engines sound so farkn good man. i swear ....

[gumbs]

Yeh I like it. My bogan mates think its the "vtec scream" I was just worried something might be wrong it was going to exploding on me or something.