I keep getting talked out of a OTRCAI..?..

[Solone]

Over past two days two sellers of two different OTRCAI have called me to convince me out of buying them??

I have a VT2 ls1 with extractors, high flow cats, twin exhaust system, maffless tune, gts maffless pipe and bmc filter panel in stock air box. Also have 2hole mod.

In the past I have owned a ls1 with same setup but add cam, valve springs and orrsom OTRCAI. I previously added the OTRCAI and back to back on a dyno saw 12rwkw over the gts mafpipe/2 hole mod. On the road probably couldn't feel the extra power though.

But over past few days I've tried to buy from two different sellers a OTRCAI and both have called me to convince me out of it. Two well known brands, one seller said to me if I buy there are no returns as he said its more for a hotrod than a show car and I likely wouldn't be pleased with the finish. Also said its heaps more maintenance and generally not worth it.

The second seller contacted me ans said there is plenty stuffing around to fit it, sometimes have to bend bits and relocate bonnet latch etc etc. said to retain my setup and maybe open up front of air box more? He said the OTRCAI is the ultimate intake but they are not for everyone and told me to steer away from it.

Why are these sellers trying to convince me not to buy the OTRCAI. I don't remember my previous ls1 having any issues with the fit or requiring additional maintenance?

I feel a little silly to buy their products when they are telling me not to buy? If the products were good why wouldn't they just take my money?

Are there any OTRCAI that fit without any mucking around? Or perform better than others?

[rockstarjr]

Get a Duspeed mate

[Wonky]

Get a Duspeed mate

+1 :goodjob:

I've had Orrsom OTR on my SSV sedan and now Duspeed on my SSV ute - absolutely no problems!! Easy fit and low maintenance. Sounds like you must have been chasing specialist OTRs??? :confused:

[Toddler78]

I think the VT and VX have the AC condenser in a closer location then the VY onwards which means you have to bend the top few bars of the condensor down (apparently) Not having a go but depending on your approach to the shops and your requirements that may indicate your experiences. I am in sales and am very good at it but I have been known to walk away from a sale or talk someone out buying because I know after talking to the customer I would be unable to make them happy as their expectations on either performance or finish is greater then I know I can provide, thus cheaper to walk away from a job then get it and deal with the consequences.

[V28VX37]

Sounds strange, especially the comment on maintenance. Overall there's less parts to an OTRCAI than any other intake arrangement, so surely it's the least maintenance too?

I reckon the performance difference between different OTRCAIs is stuff all. You probably want a non-alloy one for less weight. Just make sure you position it correctly (i.e. piping length using the supplied clamps) and there shouldn't be any issues with scrubbing etc. The performance increase is small enough so that you probably won't even need a touch up tune.

Oh yeah and the W427 has an OTRCAI so it's a pretty proven setup :)

[Toddler78]

Sounds strange, especially the comment on maintenance. Overall there's less parts to an OTRCAI than any other intake arrangement, so surely it's the least maintenance too?

I reckon the performance difference between different OTRCAIs is stuff all. You probably want a non-alloy one for less weight. Just make sure you position it correctly (i.e. piping length using the supplied clamps) and there shouldn't be any issues with scrubbing etc. The performance increase is small enough so that you probably won't even need a touch up tune.

Oh yeah and the W427 has an OTRCAI so it's a pretty proven setup :)

maintenance = yes there will be more maintenance as the OTR filters DO get alot dirtier then the Airbox arrangement so yes need to be cleaned more often.

Power side of things well thats debatable but I know from experience and others have also testified you will feel the difference, the OTR will be more responsive when you step on the loud pedal

[bozodos]

Just get a VCM one, cheaper than a Duspeed and does the exact same thing...

[VX-SS-383]

They are nothing alike lol vcm is alloy duspeed is fibreglas
and has the air dam,hence the need to bend the condensor back 30 min job
worth the money and they look like they are meant to be there only
got to look at a few pics to see why.
Had an orssom otr and rubbed on the bonnett a lil but other than
that no fitting issues.

[bozodos]

I said they were the same in functionality, not looks or construction. I do realise however that this forum seems to have a lot of people always recommending the most expensive option, seemingly for the sake of it at times!

I'd say its accurate about bending the aircon condenser though, my VZ one fits fine, but the same OTR on a WH required the condenser to be bent noticeably. I looked at the Duspeed when I bought mine, but the extra $200 was not worth it IMO.

[kevin101]

Had a VCM Alloy in the VX SS, trimmed a bit of the plastic on top of the radiator and tapped one row of fins down on the condenser looked great, I cut the original plastic cover to fit around the intake. I can't say for sure if power was increased over the two hole mod but I can say that response was really noticeable.

[surfwagon]

Like exhaust systems OTR's can be quite expensive on bang for bucks basis but like exhausts sometimes the aural pleasure is worth more than the outright cost.
Adding that induction noise with a good exhaust sound can make all the difference.

[fishman88]

Had a VCM Alloy in the VX SS, trimmed a bit of the plastic on top of the radiator and tapped one row of fins down on the condenser looked great, I cut the original plastic cover to fit around the intake. I can't say for sure if power was increased over the two hole mod but I can say that response was really noticeable.

got the vcm otr aswell on my vx n shaved off 0.27 off my times down the 1/4 mile over the 2 hole mod with a vy clubsport shroud definitely worth the upgrade.

[CoreyR8]

Ive got a vcm OTR on my Vx r8 and it got straight on, no trimming or bending required. Works and looks great!

[Solone]

checking out ebay in the us.

there are GTO intakes that are different to our own. Sharply priced too.

seem to go down the path of a pod behind the headlight, not many OTR designs over in the states for their GTO /monaro

[QldKev]

I've got the DuSpeed OTRCAI. I don't have a comparison against the 2-hole mod as we fitted the OTRCAI + mafless tune at the same time; of course overall a change you could notice.

I did need to cut away the black plastic from above the radiator, and reposition/lay back the radiator to get the CAI to fit. Wasn't a huge job, and it was something I did at home.

I find I do need to clean it more often than what I did compared to the stock paper air cleaner. But we are still not talking huge amounts of work.

QldKev

[Jase18]

I also have a Duspeed. Both VCM & Duspeed have great reviews from customers, but for me it basically came down to the factory look of the Duspeed. As previously mentioned the filter does get more dirty than factory airbox but is not difficult to remove and clean. I did have to adjust the bonnet slightly so that it didnt rub on the top of my OTR, 5 second job. Cheers

[surfwagon]

I have the duspeed for that factory look also, painted mine satin black so it blended in with the HSV/Holden paint scheme in the engine bay.
http://i130.photobucket.com/albums/p266/surfwagon/DSCF0483.jpg

[Solone]

Ended up talking myself into buying an OTR

Bought from www.pcpa.com.au apparently a fibreglass OTR similar to vcm. Can't wait to strap it on.

[surfwagon]

Beside anything else you will love the induction noise you get from an OTR.

[macca_779]

Beside anything else you will love the induction noise you get from an OTR.

I can't hear mine... Exhaust kinda overpowers it

[BLACK 346]

I can't hear mine... Exhaust kinda overpowers it

Yeah, only time I can hear mine is when you are standing directly in front of the car, then it sounds like it is trying to suck you in.

[Wonky]

I can't hear mine... Exhaust kinda overpowers it

Same here! :D

[bozodos]

See how it goes with the air filter fitment at the front

[QldKev]

Ended up talking myself into buying an OTR

Bought from www.pcpa.com.au (http://www.pcpa.com.au) apparently a fibreglass OTR similar to vcm. Can't wait to strap it on.


Do you know what air filter they use for it, have have they tested air flow? I'm just a bit skeptical after reading a few bits on them. Click search in the top right corner and enter "pcpa"

[Solone]

Do you know what air filter they use for it, have have they tested air flow? I'm just a bit skeptical after reading a few bits on them. Click search in the top right corner and enter "pcpa"


The damn OTR turns up with no rubber grommet in the OTR for IAT sensor?

Emailed them and he says use the rubber grommet from stock air box??? The stock IAT sensor is held in by a metal clip and can't fit on OTR as fibreglass too thick?

What grommet do I use to fit. I mean for gods sake they can't even supply a grommet?

[Roonstain]

Should have bought a proper one mate....
You are in western sydney - why not visit Dus at Duspeed - he would have sold you a great unit and even fitted it for ya

[bozodos]

He could have also bought the non rip off VCM one for $500 that comes with grommet and (sensor or extension loom cant quite remember)

[Jamolad]

The damn OTR turns up with no rubber grommet in the OTR for IAT sensor?

Emailed them and he says use the rubber grommet from stock air box??? The stock IAT sensor is held in by a metal clip and can't fit on OTR as fibreglass too thick?

What grommet do I use to fit. I mean for gods sake they can't even supply a grommet?

They are probably talking about the rubber grommets that hold the airbox in place, not the grommet that holds the IAT in the airbox in VT2 & VX1.

[Solone]

A few reasons why I chose this OTR

Its made of fibreglass so wont heat up like a radiator like the alloy ones.

The duspeed one is nice but at $680?? For a bit of fibreglass? its really heavy on the customer. Even the one I bought is a bit steep for what you get. Years ago I bought a Oorsom OTR for about $650 and agin I was shaking my head at the price.

These things should be $250 max.

[BLACK 346]

Its made of fibreglass so wont heat up like a radiator like the alloy ones.

The air passes through these that bloody quick, I doubt the heat of an alloy otr would have any effect on intake temp. Happy to be proven wrong.

I agree with what you are saying on price, they are all well overpriced really.

[Solone]

The air passes through these that bloody quick, I doubt the heat of an alloy otr would have any effect on intake temp. Happy to be proven wrong.

I agree with what you are saying on price, they are all well overpriced really.

But like an intercooler, air passes through it very quick also and is cooled so wouldnt you think air would be heated travelling through a hot alloy intake especially since its travelling slower than compressed air.

the effort to fabricate an OTR would be no more than to fabricate an OEM airbox. Surely noone would pay $650 for an OEM airbox?

[Magnum9]

You have to get a return on your investment in design somehow. CNC molds generally cost over $50k.

[bozodos]

there was a thread on here somewhere where someone did comparative IAT readings...

TL;DR: heat soak is only an issue when idling for extended periods in hot weather, and even then the effects are mitigated not long after resuming motion.

[Roonstain]

A few reasons why I chose this OTR

Its made of fibreglass so wont heat up like a radiator like the alloy ones.

The duspeed one is nice but at $680?? For a bit of fibreglass? its really heavy on the customer. Even the one I bought is a bit steep for what you get. Years ago I bought a Oorsom OTR for about $650 and agin I was shaking my head at the price.

These things should be $250 max.

If you went to him like I said, i doubt you'd pay that
And you wanna save money and buy the cheaper one - look what you get - I would rather spend money once (and I am a real cheap arse with stuff on the car!)

[LuisS]

We have a new otr coming out soon - carbon fibre, and will be priced very competitively :up2sum:

[QldKev]

If you went to him like I said, i doubt you'd pay that
And you wanna save money and buy the cheaper one - look what you get - I would rather spend money once (and I am a real cheap arse with stuff on the car!)

I'm more worried about what quality of a filter would be on a cheap one. Too much dust getting through into the motor will cost a lot more than what the OTRCAI is worth.

[sjhugh]

A few reasons why I chose this OTR

Its made of fibreglass so wont heat up like a radiator like the alloy ones.

The duspeed one is nice but at $680?? For a bit of fibreglass? its really heavy on the customer. Even the one I bought is a bit steep for what you get. Years ago I bought a Oorsom OTR for about $650 and agin I was shaking my head at the price.

These things should be $250 max.


Yeah, everything should be cheaper.


I’ve had a few different OTR’s and found the good ones (knowing you usually get what you pay for) are much the same for a street application and preference usually comes down to either the look you’re after or what your particular shop is recommending at the time.


I did find one of the plastic OTR’s I had a couple of years back did suck in on itself when under load but it still performed well.


I currently have an alloy one. I like the look, it seems to do the job, it’s easy to clean, it doesn’t buckle when revved hard and contrary to some beliefs, it doesn’t get hot.


I can drive in traffic then get out and place my hand on it and leave it there, I can’t do that with a radiator.


Are the fiberglass ones heavy?



http://i306.photobucket.com/albums/nn249/sjhugh/bIMG_2279.jpg


http://i306.photobucket.com/albums/nn249/sjhugh/aIMG_2265.jpg



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[Solone]

Yeah, everything should be cheaper.


I’ve had a few different OTR’s and found the good ones (knowing you usually get what you pay for) are much the same for a street application and preference usually comes down to either the look you’re after or what your particular shop is recommending at the time.


I did find one of the plastic OTR’s I had a couple of years back did suck in on itself when under load but it still performed well.


I currently have an alloy one. I like the look, it seems to do the job, it’s easy to clean, it doesn’t buckle when revved hard and contrary to some beliefs, it doesn’t get hot.


I can drive in traffic then get out and place my hand on it and leave it there, I can’t do that with a radiator.


Are the fiberglass ones heavy?




.

Fibreglass OTR come in at 1.9kg including the clamps, silicone joiner and the box!!! I took for a drive tonight, stopped and checked it out, ice cold the OTR. The intake manifold was also ice cold and I was going flat chat for a few mins and some idling.

Touching radiator was smokin hot. My OTR doesn't touch anything, not even radiator. Also I have old ss inductions metal scoop for ss inductions OTR. So grabs air from right behind grill and OTR sits right on top of it. Really happy with the fit but very difficult to get IAT in.