'Z' - Dumps on the Dyno..........

Next time......

......I may consider you writing my articles for me as you have kindy advised me how to write this one in hindsight.D This information is as I received from AMS. As far as I know they were stock dumps with adapters, BUT, I shall chek on that for you:zlove: Is there anything else you would like me to check on as well perhaps? I could ask the guys at AMS for you.

Also as a suggestion, why don't you do a comparison on your car and post up the results? That would take a lot of conjecture out of the equation.

That way you would be in a better position to offer comments.

I believe I have mentioned what the point is, and that has been conveniently overlooked by some

 

well the figures mentioned '' 71hp and 66 torque'' are not relevant to us because they were using pre-cats in the us , we no that they are restrictive, so by putting any aftermarket dump on it , i will make an improvement just by eliminating the pre-cat .....
its not about USA vs oz at all in this case its about giving people the right information ,.
we do not run pre-cats , so , so our figures will be different , i would say by a lot

 

Please advise.......

.......where I have said that this test was done on an Oz Zed?

.......aso post up similar or same tests done on an Oz Zed.?

......or post up similar or same tests done on any Zed 32?

......this woul add considerably to the subject ina very positive way

.........AND please advise exacty how much difference there would be, that you can actually show, in any test at all done on an Oz Zed incomparison to a US Zed.????

..........I believe at not stage I have said that an Oz Zed will have the same improvements.

......again positive input and constructive comments are always welcome in any thread on this Forum

 

it isnt possible to compare the us zpec zed and the aus spec zed. as far as i know the us spec came with turbos and the aus without, so i dont know why people are asking for a comp between the two specs

 

This........

........is the only comparison I have access to at this time

 

W.A Jap TT Zed

Guys

I will try and get a few print outs... There is one guy here in WA with a white Z Jap TT... Stock motor!!! He put Ebay 2.5 inch dumps that cost him 200 - 300... Then bolted a 2.5inch cat back system twin...pulled around 22hp rear wheel... He did spend $3,500 on the rest of the system fitted...

But I would like to know the diff between 3" & 2.5" system on a TT z Jap or Ozy

Chook

Im looking to buy Cats & Rear Pipes for my Jap TT Zed... I have 2.5" Dumps but would sell $$$ If the gain was greater with 3" System... But the 3" system DRONES through out the car...

Im also looking for Turbo inlet pipes with blow off valves on top??? Just under bonnet... any ideas

 

No need to get defensive, I was simply trying to clear up a point that wasn't clear in the original post. At the same time I was trying to educate any members who were unaware that the stock US system came with precats that were not fitted to the J-spec cars that we own. It was simply done for future reference in case somewhere down the track a member here buys those same dumps and then starts to complain that he didn't get the same jump in power.

 

US Spec stock dumps


J Spec stock dumps


AMS 3" dumps

 

it comes down to the power you are after and the power your engine is throwing out.....

is your car stock? i would reccomend 2.5'' and start to think about 3'' once you reack 300rwkw...even then 2.5'' is sufficiant. 400rwkw+ i would go to the 3'' but for most people 2.5'' is plenty

 

i never said that you said were the test was done

you said ..
".................a number of members have asked about the advantages of Dumps,... 3'' dumps in particular. It is well known that 2.5'' or 3'' Dumps do improve performance. Here is a Dyno sheet showing exactly how much."

so the numbers of people that asked you for this information , are getting the wrong information ..

obviously the people that are in Australia want to know what the benefits are for there cars ,,,,

the information that was provided was tested on a US car that run a different stock dump system then what we do ( AUS ) ..

it the same as saying we want to test aftermarket rear mufflers to see if we get any more power , but we may as well take the cats out to do the test ,,,its the same thing ,, the numbers will be different ,.

you are going to make more power with the cats out ,..


these guys in the USA had the pre-cats in at the time of the test ... in this case they will make a lot more power when they put aftermarket dumps on there cars...

but in our case its different , we don't run pre-cats so the numbers will be way different ..

people are going by the numbers that you provided for them, on this forum, thinking they are going to get about 71 hp and 66 torque if they buy these dumps , ( misleading if you ask me )..

 

Absolutely...........

.......unusual and totally amazing for you to accuse this of being misleading. There is nothing misleading about putting up factual Dyno Tests for information of Zed owners. I just wonder about your real agenda. That is the same as accusing the members of this Forum as Morons and not understanding information provided. I am sure they would not appreciate that one bit. In any case several members have aready pointed out that the US and Oz Zeds are different. How many times would you like to state it. If you feel it should be made even clearer, and, stated again, please go ahead. Once more, thanks for your re-iteration of that point:zlove: This is a good robust discussion that is bringing a number of good points to the fore that members will appreciate. Keep it up guys:thumbup:

 

no problem any time you need a hand just let me know :zlove:

 

It comes down

to how much people know about these cars! I didn't think it was misleading. The two graphs shown are small and hard to see, but it looks like torque curve went south, and they pushed out few more usless horses after that.

 

And,......

.....I was simply replying to your comments that are always welcome:zlove: Where in the world did you get defensive from. Is that what you would like to see ?

 

Ive been looking at dumps for a while now, thanks STS, lol.
This post is quite imformative.
I think those results speak for themselves.
ALTHOUGH: i had no idea the US dumps had cats in them, that changes things. The differences in power output befor and after would be marginally different..... having said that... different non the less. We'd still see a jump in power, maybe not as much of a jump.... but isnt that the point of dumps anyway? Greater flow = more power?
Thanks for the info Paul, thanks everyone else for your inputs.

 

another.. s***t fight over 3" dumps...

they are proven 2 make not only more power but also decrease lag and let your turbo actually make more boost...

i have these on my turbos and even without vtc my car doesnt feel laggy

if in doubt dont buy them... then again every other turbo car has a 3" dump pipe ... its personal choice of course!!!

every bit of flow out of the turbo is worth it in my opinion

 

I have to applaud StS for being very patient. I would be pissed if this was my thread lol. If you would have just posted that the us spec cars come with precats in the first place i wouldn't have to read through a page of crap.

Rather than see a test on the car i would like to see flow numbers through the 2.5" main and the 3"main. I wonder what the difference would be.