Cold air Intake (LS2)

[Yanayaya]

This really applies to all of the engines to be honest but I've been looking at cold air feeds for the Monaro and there appear to be the "typical" K&N solutions available which take the feed from the same place the airbox does but in Australia I noticed these rather aggressive looking over radiator intakes that take the air directly from the front.

In terms of performance it would seem logical to assume the straight from the front options with the way to go I was curious if anyone had looked into this or tried it themselves. Naturally the solutions for the straight from the front are more expensive than the cone filters.

[SturdyHSV]

The general consensus is that they see an improvement at higher speeds, maybe 90, 100+ but there's not much in it at normal speeds.

My IATs seem to drop to ambient levels very quickly once moving, I don't know for comparison how quickly the cone filters drop though having only gone from stock to OTR.

There are more VXR8s with the OTR I'd guess as Monkfish supply one, Monaro wise the list is fairly limited I believe, jwoodvxr had a SvedeSpeed on his now sold VXR, KMud has an X-Air one on his CV8, and I have a SvedeSpeed on my VXR. I'm sure there's more though?

ringram had one on his huge engined VXR8, and it was in fact a limiting factor due to a lack of filter area to feed his power habit (~500rwhp I think?)

Old pic here of mine

Edited by SturdyHSV on Friday 22 August 08:48

[Yanayaya]

Wow that's one meaty looking engine there, are you using coil brackets (MSD) too? I saw them online but wasn't sure what the benefit of those was either.

[MyM8V8]

[MyM8V8]

[mikeyb1987]

SturdyHSV said:

The general consensus is that they see an improvement at higher speeds, maybe 90, 100+ but there's not much in it at normal speeds.

My IATs seem to drop to ambient levels very quickly once moving, I don't know for comparison how quickly the cone filters drop though having only gone from stock to OTR.

There are more VXR8s with the OTR I'd guess as Monkfish supply one, Monaro wise the list is fairly limited I believe, jwoodvxr had a SvedeSpeed on his now sold VXR, KMud has an X-Air one on his CV8, and I have a SvedeSpeed on my VXR. I'm sure there's more though?

Edited by SturdyHSV on Friday 22 August 08:48

I have a SvedeSpeed too Agree with Sturdy- IATs drop very quickly to ambient once on the move. At Thunder Road, my IATs were 40-45c on the start line, but quickly dropped to ambient by the time I was at 40-60mph.

[KMud]

mikeyb1987 said:

I have a SvedeSpeed too Agree with Sturdy- IATs drop very quickly to ambient once on the move. At Thunder Road, my IATs were 40-45c on the start line, but quickly dropped to ambient by the time I was at 40-60mph.

My IATs were up to 69'C in line at TR, but my sensor is in the OTR, right over the radiator. I realise this thread is LS2-specific, but I think opinions (and performance) of OTRs may be coloured by IAT sensor location. I was in fourth before the heat-soaked sensor wasn't commanding pulled timing.

[mikeyb1987]

KMud said:

mikeyb1987 said:

I have a SvedeSpeed too Agree with Sturdy- IATs drop very quickly to ambient once on the move. At Thunder Road, my IATs were 40-45c on the start line, but quickly dropped to ambient by the time I was at 40-60mph.

My IATs were up to 69'C in line at TR, but my sensor is in the OTR, right over the radiator. I realise this thread is LS2-specific, but I think opinions (and performance) of OTRs may be coloured by IAT sensor location. I was in fourth before the heat-soaked sensor wasn't commanding pulled timing.

Sorry, I should've been more specific in my post (I tried to post it quickly before a meeting!). My temp sensor is also in the filter housing, above the radiator. With the bonnet shut, mine rose to mid-60s, but with the bonnet open, they didn't go higher than mid-40s. I was just about the only NA guy there with my bonnet up, and that is why
I logged my runs on the Dashcommand app, so will double-check the IAT recovery and report back.

[MyM8V8]

mikeyb1987 said:

I logged my runs on the Dashcommand app, so will double-check the IAT recovery and report back.

Yes Please.

[SturdyHSV]

Yanayaya said:

Wow that's one meaty looking engine there, are you using coil brackets (MSD) too? I saw them online but wasn't sure what the benefit of those was either.

Nope, stock coilpacks, I just painted the brackets red (they're black now as it would've clashed with my fuel rails, and I'm a tart )

mikeyb1987 said:

I have a SvedeSpeed too Agree with Sturdy- IATs drop very quickly to ambient once on the move. At Thunder Road, my IATs were 40-45c on the start line, but quickly dropped to ambient by the time I was at 40-60mph.

Ah yes, course you do Pics required

Love your motor Gareth I've got some fun winter plans that I'm acquiring some bits for already, can't wait

[Yanayaya]

I should turn this into an engine bay thread

[mikeyb1987]

MyM8V8 said:

mikeyb1987 said:

I logged my runs on the Dashcommand app, so will double-check the IAT recovery and report back.

Yes Please.

Ben was correct re when the temps reduced, I was obviously just spouting bull


Run 1 (bonnet stayed shut in queue):

MPH - Temp (c)
0 - 60
60 - 60
76 - 37
104 - 37
124 - 24
130 - 24

Run 2 (bonnet open in queue):

MPH - Temp (c)
0 - 44
52 - 44
78 - 34
101 - 34
138 - 24


I would've expected the temps to come down steadily, not in stages. The above is from a playback of the log, so it may be that the playback is a bit jerky! Definitely worth keeping the bonnet up if running an OTR though.

[mikeyb1987]

Pics:









Ignore the messy cables- these have now been tidied!!

[ringram]

Whats that communist maf doing in yours mikey!?

Id wager there is power there with that gone in yours. Also did you log manifold pressure? Kpa?

If so what was it at redline? Each kpa under 100 is roughly 1% less power. Look to your intake and maf for the missing kpa's

[ringram]

mikeyb1987 said:

Ben was correct re when the temps reduced, I was obviously just spouting bull


Run 1 (bonnet stayed shut in queue):

MPH - Temp (c)
0 - 60
60 - 60
76 - 37
104 - 37
124 - 24
130 - 24

Run 2 (bonnet open in queue):

MPH - Temp (c)
0 - 44
52 - 44
78 - 34
101 - 34
138 - 24


I would've expected the temps to come down steadily, not in stages. The above is from a playback of the log, so it may be that the playback is a bit jerky! Definitely worth keeping the bonnet up if running an OTR though.

Very interesting.

At 0 mph with the cone off to the side I get 27*C then at Max speed I got 25*C
So only 2* variation, that also means I wont have pulled any timing, at least initially. Though at WOT in 5th I got some KR.

So way less heatsoak as it doesnt sit on the radiator, even though its a metal intake pipe.
Also min Kpa was 96 which is bad as max was 98, though I didnt get a key on reading to see what atmos was.. Did anyone?

[gsd2000]

Rich, could you swap the metal section with a plastic/composite section to reduce heat soak?

[r8black]

Any excuse for a pic here's my orrsom OTR

[jwoodVXR]

Sorry to hijack but mickeyb1987: did your VXR already have the Svede Speed on it when you bought it? Trying to find-out what happen to my old VXR after I sold it & I'm wondering if it's now with you:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[MyM8V8]

mikeyb1987 said:

Pics:









Ignore the messy cables- these have now been tidied!!

What is the area of filter in that OTR Mate?

[MyM8V8]

SturdyHSV said:

Ah yes, course you do Pics required

Love your motor Gareth I've got some fun winter plans that I'm acquiring some bits for already, can't wait

Don't worry, there are parts of your engine bay that I covet.