50mm Inlet

But in your opinion, which is the best!? which one are you going to fit, or leave?

 

well thats good news for me

i can keep my nice shiney 42mm were it is and dont have to pollish up the 50mm manifold ive got looks like im going to be selling mine too

its a shame for you gary as your 50mm looks sweet as sappose you gonna do the same with your 42 now

 

i think there will be alot of 50mm manifolds in parts for sale


p.s. i get max torque at 5k with the 42mm.

Edited by: Brookster

 

http://hocheichen.free.fr/images/latestdyno/

Plots here from todays Stealth RR day, gvk4250 are the comparitive plots between inlets..





Darker graph is the 50mm...
Edited by: GVK

 

see what you mean about the better midrange with them graphs

better get my 50mm manifold up for sale quick then LOL

 

but couldn't you get a litle bit more power, if tuned properly after the 50mm was in!?no diference at all?

 

Ignition timing on the car is about the max it will go without pinking, so no, other than changing cams etc no other way of increasing the power.

 

My car must be really crap then.. it's got 50mm and hasn't got twin zorst cams!

 

no one ever thought of making a variable inlet manifold for the 16v. I know it a completely different engine but the MK4 VR gains 38NM of torque @ 3k with the manifold apposed to without the change over barrel, gains start at 1k all the way up to 4k.

dont know the stats for the early VR


Do you think the idea could be adapted to suit the 16v????????

 

its gone very quiet...................was it that much of a stupid question

 

Will my 9A have a 42 or a 50?

 

argh!! then, now, i don't know which i should keep!! go by GVK, and fit the 42mm, or go by tub and let the 50mm!

 

Good idea in theory Daz, but how you would actually go about it I don't know

HiDRO - This is the results from my car and engine, and what works or doesn't on my engine may work or not on another similar engine.

Tub, you've got to remember OUR ENGINES ARE DIFFERENT

I've also been thinking, when I thought the 50mm gave better performance over 5k, it's more to the point that it's slightly worse under 5k now than it was that it seems to go better over 5k

It still drives better than with the Schrick cams so I'm not too bothered.
Edited by: GVK

 

So what about the mith that the 50mm works better on 1.8s??

 

What about it? I haven't got an 1800

 

Measure it

 

not at all IMO.

 

DAZ, alfa t sparks have a variable volume inlet, might be worth a bodge on

did chrismc run?

 

50mm is a 1.8l manifold after all, it isn't supposed to work on a 2.0

 

All of the manifolds were on the 1.8 as standard at some point though. I have a Jetta 1.8 16v engine thats standard and came with the 42mm!