Magic brand 4" Cats

[Shaun]

Im in on a group buy if anyone else is interested! Hey YogiOOO, can you get them for $450 all the time?

I was reading a post yesterday (i think) that said they were $550 retail and $350 trade?

I also read in zoom that you can buy reducers with the Magic cat so it can fit on a 3 inch exhaust. Im not sure if i'd like that though.

Shaun.

[Cubes]

I'm unsure how exhaust cfm relates to power, if it were the same as the inlet then 750cfm is around 570hp worth of air.

How as was the 750cfm tested? As soon as backpressure appeared?

[Shaun]

Im certainly not an expert, but i thought it was just a measure of the ability of air to flow thru a given space. And as airflow is proportional to engine hp, the more cfm an exhaust can flow, the more hp it can handle without significant restriction. Does that make sense??

[dojobi]

Well I suppose if the air goes in, it has to go out.

[Cubes]

Thats correct, will its volume be different due to the bang?

Possibly less dense so that would say more exhaust flow cfm vs inlet?

[dojobi]

Maybe I'm not really too well versed in this sort of thing. Now that I think about it, I'd assume the hydrogen and carbon in the petrol would turn into gas form after being burnt, so you'd need quite a bit more flow area on the exhaust side.

[Shaun]

Yeah, the air on the exhaust side would be less dense due to the heat involved. So i suppose you've gotta allow for the expansion of the exhaust gasses. Its not that MORE air is flowing out of the ehaust compared to the inlet because the same amount of air going in has to come out again. Its just that the hotter exhaust gas will want to expand, hence requiring more space to flow through without significant restriction. Thats what i reckon.

[Shaun]

Oh, i just spoke to the people that make MAGIC CAT on the Northern Beaches (Sydney), and they have come down in price now to $300 each. I mentioned a group buy and he said that he'd be interested in that. Im not sure what sort of discount though. The cats now neck down from 4 inch to about 3.5 inch apparently. I havent heard anything bad about them, so ill probably get one.

[dojobi]

I hadn't even considered the heat difference. I guess that's why we need our drainpipe sized exhausts then

BTW $300 is a bargain for a Magic Cat. I think I might have to pick one up.

[TTT]

SydneyKid has tested this on one of their race cars.

their race cars don't use cats so a dyno run was done as is and as a test he fitted the 4 inch Magic Cat and dyno'd again and the car lost no power at all.

he mentioned that this was the ONLY cat he had seen with this type of result.

Considering the CATCO 3 inch ones are worth about $250 I think, this magic cat at $300 is a bargain.

[PHATR32]

hey im in the market for a cat, so if you can beat $300 with a group buy, id be in!

steve

[yogi000]

Im in on a group buy if anyone else is interested! Hey YogiOOO, can you get them for $450 all the time?  

I was reading a post yesterday (i think) that said they were $550 retail and $350 trade?

I also read in zoom that you can buy reducers with the Magic cat so it can fit on a 3 inch exhaust. Im not sure if i'd like that though.

Shaun.

i bought that one there at trade, so its was alot cheaper than any price mentioned above. I'm taking mine to get the reducers put on this weekend hopefully for my 3" exhaust

[PHATR32]

got anymore details?

[Bl4cK32]

Id buy one for $300 or less...trick is i need it before next friday

[shif_tea]

what do u need to get it for trade??? Just an abn or an account or something?? I'd be in for one if it was cheap, around these prices.

[Shaun]

I'd be in too. Anyone out there who has the ability to get these things at trade prices, let us know!

[Sumo]

shif_tea: Depends on the suppliers - Some places we can buy all the auto elec stuff at trade price, but if I were to go to buy their 240 volt gear - we get no discount. (I know as we needed fluro lights for the workshop)

I have heard with places like repco, once your setup with an account with them, you have access to their whole range - although im only going on what I have been told.

Cheers

Sumo

[Blitz]

Did someone mention a group buy?

http://www.skylinesaustralia.com/forums/sh...963#post1388963

[yogi000]

if anyone is after one urgently, let me know and i'll see if i can help.

[Bl4cK32]

I am....let me know what price, cos i need one as me car is getting tuned on the 10th