So... I decided that boring out my stock TB wasn't going to be good enough, so I rigged a custom billet aluminum TB. It's a tad over 6mm bigger...

I installed it and it immediately made quite a big difference. However, I am waiting on the intake-manifold... so I didn't port the inlet of my stock manifold. I have no idea about hp gains... but it definately feels stronger from 5K to 7K. I think with the intake manifold... I expect 10-15whp at the minimum.

Picture #1 (installed view):

http://photos.yahoo.com/bc/gunjan_ra...c=ph%26.view=t

Picture #2 (Comparison to stock):

http://photos.yahoo.com/bc/gunjan_ra...c=ph%26.view=t

 

wow that's quite a difference.

 

Some added notes:

(1) No more cruise-control
(2) No more IAC (Idle Air Control) - this poses a little problem which I haven't resolved yet, but more on that later
(3) Doesn't quite idle perfect (in addition to the IAC issue)... working on this as well

 

Another note:

If this poses a big problem for driveability... I will use this TB only for the track - its a 5min job to swap them out, so its not any harder than changing tires, for example.

 

I'm shipping the manifold tomorrow!

 

I have all my porting bits ready

 

Damn, I was ready to order one too . Keep up the good work!

 

70 mm ?


how much does it cost?

 

where the hell did you get that one? i'd definitely use it for track use

 

Nobody makes one for the CL-S... and I know the guy who knows the guy who makes them for several speed shops. If he made one absolutely one-off... meaning it will fit perfectly and have AIC/cruise-control... its upwards of $500.

 

hmmm if i knew for sure that this thing would produce 15hp with manifold work. I'd spend the money.

 

now my question to you, is where did you get yours? was it an upgrade from the accord v6 and you fabricated or what

 

Loosely based on the accord V6... else its very expensive to have it CNC'd from scratch!

 

Now is it POSSIBLE to port the stock TB to 70mm?

 

Stock TB can go about 3-something mm-over MAX! Ours are relatively thinner than usual B-series or H-series motors...

 

With more air coming in, did the ECU have problems adjusting the air/fuel ratio so you get a smooth acceleration? or do you think if you get a VAFC(?) would help?

 

a lot of times just unplugging the battery overnight helps reset the ECU, that may just be a rumor but when i did that i noticed a lil difference

 

All I gots to say is sweet.... Keep up the good work allmotor let us kow when all the bugs are worked out....