Cold air Intake (LS2)
Discussion
ringram said:
We can log your dyno pull too and compare against atmospheric.
That will tell you how much pressure/power you are missing.
^^^This is the only way to find out if an OTR is suitable for a particular engine or set up. Its all about big flow and low Delta p.That will tell you how much pressure/power you are missing.
So it will be interesting to see some results from the different manufacturers.
The Vararam pictured earlier (Mailer555) has a huge filter element which unfortunately is not shown in that picture as its covered. Vararam also do an OTR for the Pontiac GTO which fits the VT and VZ Monaros. Flat panel filters just don't cut it for large displacement engines.
But as always, DYOR.
http://www.vararam.com/g8.html
check the link out for all the information you'll ever need on the Vararam OTR I'm using. its even Guaranteed to take 0.3 sec and add 3mph to your quarter mile times or they will refund and pay for shipping!
check the link out for all the information you'll ever need on the Vararam OTR I'm using. its even Guaranteed to take 0.3 sec and add 3mph to your quarter mile times or they will refund and pay for shipping!
VCM recon there's is better http://www.improvedracing.com/intakes/vcm-otr-inta...
But logging will tell all.. I have to go by surface area. I know my current CAI handles flow requirements, but Id love an OTR that does the same without restriction. So far Ive tried 3 types of otrcai and none have enough airflow..
But logging will tell all.. I have to go by surface area. I know my current CAI handles flow requirements, but Id love an OTR that does the same without restriction. So far Ive tried 3 types of otrcai and none have enough airflow..
ringram said:
VCM recon there's is better http://www.improvedracing.com/intakes/vcm-otr-inta...
But logging will tell all.. I have to go by surface area. I know my current CAI handles flow requirements, but Id love an OTR that does the same without restriction. So far Ive tried 3 types of otrcai and none have enough airflow..
It doesn't compare the Vararam.But logging will tell all.. I have to go by surface area. I know my current CAI handles flow requirements, but Id love an OTR that does the same without restriction. So far Ive tried 3 types of otrcai and none have enough airflow..
ringram said:
VCM recon there's is better http://www.improvedracing.com/intakes/vcm-otr-inta...
But logging will tell all.. I have to go by surface area. I know my current CAI handles flow requirements, but Id love an OTR that does the same without restriction. So far Ive tried 3 types of otrcai and none have enough airflow..
there was no comparison between the vararam and the vcm in your link!?But logging will tell all.. I have to go by surface area. I know my current CAI handles flow requirements, but Id love an OTR that does the same without restriction. So far Ive tried 3 types of otrcai and none have enough airflow..
and no real information like in the vararam link.
vararam claim a higher HP with out mapping and give you a performance guarantee over the 1/4 mile and also give you loads of information and numbers from there testing, VCM has none of this? I'm not saying one is better than the other, I'm just saying your link doesn't show what your saying. would love to see a comparison
Some figures for people, albeit no graph sadly.
I approve of this guy's methods.
http://ls1tech.com/forums/pontiac-g8-2008-09-chevr...
I approve of this guy's methods.
http://ls1tech.com/forums/pontiac-g8-2008-09-chevr...
mailer555 said:
I'm just saying your link doesn't show what your saying. would love to see a comparison
What am I saying? All I said was "VCM say theirs is better". Not me.I go by filter area now. Thats the most objective comparison available. 1sq inch of open space flows 112cfm compare that with 6.3cfm for a square inch of filter and you will see the filter is the restriction.
If people cant get the basics right with the correct amount of fiter area then they fail at stage 1. I know I failed myself
So work out what filter area you need based on engine horsepower that information is easily and freely available.
Then find an intake that gives you that.
I dont see any point buying an intake for power any other way.
SturdyHSV said:
Some figures for people, albeit no graph sadly.
I approve of this guy's methods.
http://ls1tech.com/forums/pontiac-g8-2008-09-chevr...
Agreed, same methods Id use I approve of this guy's methods.
http://ls1tech.com/forums/pontiac-g8-2008-09-chevr...
I see someone asked a good question on temps in the thread too
3*C = 1% power, 1kpa = 1% power roughly anyway.
mailer555 said:
vararam claim a higher HP with out mapping and give you a performance guarantee over the 1/4 mile and also give you loads of information and numbers from there testing, VCM has none of this? I'm not saying one is better than the other, I'm just saying your link doesn't show what your saying. would love to see a comparison
And that, sad to say, is what most manufacturers do - obfuscate!Some of them will tell you any old tosh to sell you their (old tosh) without any empirical backup.
All too common in the performane after market.
From running at Santa Pod yesterday, I think it's fair to say I have a bit of a restriction somewhere.
Live display showed atmospheric of 101kPa before key on and logs from WOT show 99, with the odd spike of 100kPa
No MAF, SvedeSpeed OTR with a single piece of straight pipe to the throttle body.
In fairness, the filter is also bloody filthy... So it's not beyond the realms of possibility I'm losing some flow to the myriad insect corpses and general grime wedged into the filter!
Trying to plug in any remotely appropriate numbers for filter area would see me at about 200bhp by the earlier figures, so is that particularly representative? I'd suspect if I only had enough filter area to support 200bhp I'd be seeing more than a 1 or 2 kPa drop?
Do all their filters have a consistent zig zag to their filter area? Just wondering how that is included in the filter area calculation. I didn't fancy running up the strip with no filter in, not only because of the debris but also you seal it back up to the OTR when fitting the filter and I didn't have any sealant with me.
Live display showed atmospheric of 101kPa before key on and logs from WOT show 99, with the odd spike of 100kPa
No MAF, SvedeSpeed OTR with a single piece of straight pipe to the throttle body.
In fairness, the filter is also bloody filthy... So it's not beyond the realms of possibility I'm losing some flow to the myriad insect corpses and general grime wedged into the filter!
Trying to plug in any remotely appropriate numbers for filter area would see me at about 200bhp by the earlier figures, so is that particularly representative? I'd suspect if I only had enough filter area to support 200bhp I'd be seeing more than a 1 or 2 kPa drop?
Do all their filters have a consistent zig zag to their filter area? Just wondering how that is included in the filter area calculation. I didn't fancy running up the strip with no filter in, not only because of the debris but also you seal it back up to the OTR when fitting the filter and I didn't have any sealant with me.
ringram said:
What am I saying? All I said was "VCM say theirs is better". Not me.
I go by filter area now. Thats the most objective comparison available. 1sq inch of open space flows 112cfm compare that with 6.3cfm for a square inch of filter and you will see the filter is the restriction.
Only as long as the filter elements are using the same medium, under the same circumstances. A dry filter will flow more than a wet one, but a foam filter will flow more than a paper one. Decisions, decisions.... I go by filter area now. Thats the most objective comparison available. 1sq inch of open space flows 112cfm compare that with 6.3cfm for a square inch of filter and you will see the filter is the restriction.
Gassing Station | HSV & Monaro | Top of Page | What's New | My Stuff