tdonnell, are you turbo? If not please put your impressions here

I know it has been said that 65mm would/could be overkill for NA, but I ask anyway because I think maybe it's pointless to put a 65mm into a NA because it's not going to help more than a 58~61mm TB, but since there are not 58mm left for sale (and all used are almost as expensive as new ones), if the 65mm does not hurt performance noticeable, it could be an alternative to a 58mm.

 

^^^
This is what I wanna know. And tell you what my friend, I've got a 65MM BBTB coming for me soon, I will do a before and after dyno of it if I can afford it, and full pics and such.

You know me.

Tdonnell has his 65MM on and says it looks and works great, he's just waiting for his Airram now.

 

That would be awsome, we really need to learn that by now ( tongue.gif Before kspec runs out of 65mm TB's!)

 

dyno a 58-61 and the 65mm to see if its tru that it would hurt.

 

^^ Yeah REDZ, actually that should be the way to go.

 

Yes everyone, I do have the 65mm TB from kspec. I can tell you that from what I felt (no way I am paying for dyno time just yet), there was no gain at all just yet. The engine may be a LITTLE more willing to rev now, but there is really no difference yet. The reason for the little difference (there may be some power increase, but it is barely noticeable), is that I still have the stock IM, with a 52mm bore at the TB flange. I would expect to lose some low end once I get the Airram (whenever Kspec ships it out), but I would also expect to gain a decent amount of top end as well. I can tell you now that putting a 65mm TB on a stock IM does really nothing to hurt your car. I think I may have lost some air flow due to the wall that the air hits when it runs into the IM flange. I recall possibly getting to 65% on the MAF reading on my SAFC II in second at redline. Now it goes to 61. I expect that number to get nearer to the 70's once I install the airram.

I also have a plx wideband unit, and from what I can tell from the digital gauge (didn't hook up the laptop and datalog just yet), the afr didn't change that significantly if at all. The overall reason I got the 65 instead of a smaller TB is because I plan on going turbo in about 2 years (whenever I get $10,000 lol). Building my own kit with all of the best parts-20 psi. Any more q's just ask guys. cool.gif

 

Damned good idea. I'll do it. We need to get that dyno fund going folks.




Yeah, it's noted as generally being 1 to 2 HP difference until you do the IM, then maybe 5 to 8 after that. With the airram though, if you've got a CAI, you should be pulling in air at an enormous rate.

Biggest difference I found was the change in engine tone.



Should be Tuesday my man, just got an email from David.

 

Hey tdonnell, you SURE have some airflow restrictions due to the air going through the butterfly on a 65mm section and then crushing into a wall on the outter side of the section. I am sure with the AirRam (and only for the bigger intake you will gain a lot) the car will be completely different.

 

You know, I was thinking. A 65MM BBTB on the OEM IM is probably MUCH worse than that of a 59 to 61MM.

I can't wait to get mine.

 

I think I would agree with that too redz. But once I get the Airram, it should be MUCH better than a 59 or a 61mm. I shall see when I get the new IM. wink1.gif