Anyone run a 148/149mm CAI with a twin jet TB?

RBB

RBB

Well-Known Member
Established Member
Joined
Jul 3, 2013
Messages
1,354
Location
Stephens City, VA
So I'm pretty much pegging my MAF with a Gen3, 3" upper/10% lower combo with a VMP twin 69/JLT 123 on 93 pump. Tuner won't give me any more spark or boost due to high load in the logs and the MAF issue. I went through a few months of trying to run a big mono/148 this spring and never got a hold of a TB that wouldn't failsafe when hot. I held on to the 148, though, figured I'd give it another shot later on.

If I want to add a little Boostane to every tank, though, he's willing to drop a few pulley sizes. This just leaves the MAF issue. Looking at JLT's website, they do not have a coupler that will fit a 148 up to a twin blade, so I gave them a call. Turns out they do actually have one, it's just not posted on the site, so it's on the way.

Any of you guys run a 148mm CAI with a twin blade? Any drivability or idle issues? I assume it'll be no different than running one with a big mono....
 
Catmonkey

Catmonkey

I Void Warranties!
Established Member
Premium Member
Joined
May 20, 2011
Messages
3,854
Location
Louisiana
BOOYAH! I've got one, but never installed it. I don't know if there are any more around, but Ford Racing had a 140mm MAF that might not be as sensitive and still give you the resolution you need at WOT. I actually got the 148 used to cut down the tube to use with the 140. I guess I see where I'm headed.
 
me32

me32

BEASTLY SHELBY GT500 TVS
Moderator
Premium Member
Joined
Sep 6, 2005
Messages
18,479
Location
CA,NorCal
Catmonkey said:
BOOYAH! I've got one, but never installed it. I don't know if there are any more around, but Ford Racing had a 140mm MAF that might not be as sensitive and still give you the resolution you need at WOT. I actually got the 148 used to cut down the tube to use with the 140. I guess I see where I'm headed.
Click to expand...

That frpp 140 was a nice piece.
 
Klaus

Klaus

Well-Known Member
Established Member
Premium Member
Joined
Jan 18, 2018
Messages
13,729
Location
minnesota
RBB said:
So I'm pretty much pegging my MAF with a Gen3, 3" upper/10% lower combo with a VMP twin 69/JLT 123 on 93 pump. Tuner won't give me any more spark or boost due to high load in the logs and the MAF issue. I went through a few months of trying to run a big mono/148 this spring and never got a hold of a TB that wouldn't failsafe when hot. I held on to the 148, though, figured I'd give it another shot later on.

If I want to add a little Boostane to every tank, though, he's willing to drop a few pulley sizes. This just leaves the MAF issue. Looking at JLT's website, they do not have a coupler that will fit a 148 up to a twin blade, so I gave them a call. Turns out they do actually have one, it's just not posted on the site, so it's on the way.

Any of you guys run a 148mm CAI with a twin blade? Any drivability or idle issues? I assume it'll be no different than running one with a big mono....
Click to expand...

I went down this same route and was going to run 149 with my twin 69. Never used it though. NIP if you are interested.
 
1 Alibi 2

1 Alibi 2

Veteran,...retired Navy !
Established Member
SVTP OG 4 Life
Joined
Aug 27, 2011
Messages
6,859
Location
Hackettstown, N.J.
FRPP 140, JDM zip tube, FRPP mono, feeding a 3.4................93 octane tune.
.
H-town-fair-6-14-2014-003.jpg
 
RBB

RBB

Well-Known Member
Established Member
Joined
Jul 3, 2013
Messages
1,354
Location
Stephens City, VA
I’ve already got the JLT 148 guys, that’s what I was originally running with the monos. Never got rid of it, so not interested in swapping out to yet another intake.

I’m just wondering how the street manners are? Haven’t heard a whole lot either way, so I’m guessing it’s most likely a non-issue.
 
RBB

RBB

Well-Known Member
Established Member
Joined
Jul 3, 2013
Messages
1,354
Location
Stephens City, VA
Catmonkey said:
BOOYAH! I've got one, but never installed it. I don't know if there are any more around, but Ford Racing had a 140mm MAF that might not be as sensitive and still give you the resolution you need at WOT. I actually got the 148 used to cut down the tube to use with the 140. I guess I see where I'm headed.
Click to expand...
Yeah you’ll be in the same boat buddy. Not having E85 around here is the real holdup. With the 3”/10% combo on the Gen3 I’m only seeing about 13.5psi at redline. Peaks at 15psi around 4K.

Leaving so much on the table, so I’ll give the Boostane a shot.
 
P

Poisonous West

Active Member
Established Member
Joined
Nov 23, 2013
Messages
246
Location
Back in US
I used to run a TRUE dual 70mm throttle body (bored out from VMP dual 67mm with new bigger butterflies) along with my custom design and 3D printed 136mm CAI intake. Justin from VMP tuned my car and it runs with no issue. I think that's why he comes out the new dual 69mm throttle body.
 
Catmonkey

Catmonkey

I Void Warranties!
Established Member
Premium Member
Joined
May 20, 2011
Messages
3,854
Location
Louisiana
me32 said:
Whipple doesn't use the vacuum line on the right side of the intake tube. Both Eaton blowers do
Click to expand...
Not to mention that line is forward of the throttle plates, so it won't have a vacuum signal. Eaton uses an actuator by-pass motor that uses a a front barb for the opposite side of the diaphragm to vent to atmosphere. Ford routed it to filtered atmosphere inside the intake tube. If both sides of the valve had vacuum to both ports, it would be fighting with itself. Don't hook the forward barb to vacuum or the by-pass valve will stay closed.
 
Totalpkg

Totalpkg

Active Member
Established Member
Joined
Aug 22, 2006
Messages
290
Location
Cleveland,OH, USA or Toronto, Ontario, Canada
I run a 148 jlt carbon with FFRP twin 65mm...no issues fully streetable.

RBB said:
I’ve already got the JLT 148 guys, that’s what I was originally running with the monos. Never got rid of it, so not interested in swapping out to yet another intake.

I’m just wondering how the street manners are? Haven’t heard a whole lot either way, so I’m guessing it’s most likely a non-issue.
Click to expand...
 
6

69b302

Active Member
Established Member
Joined
Feb 26, 2007
Messages
511
Location
NY
RBB said:
Any of you guys run a 148mm CAI with a twin blade? Any drivability or idle issues? I assume it'll be no different than running one with a big mono....
Click to expand...

I ran the 148 for a while with the BPS Twin(73MM IIRC), and had no issues. I moved to the Whipple Elliptical eventually. Driveability will be fine with a good tune.
 
Jam421

Jam421

Jam421
Established Member
Joined
Sep 15, 2010
Messages
480
Location
Long Island NY
I'm running the JLT 148 tube thru the KB168 mono blade. The only difference between stock and/or my old VMP 67 Twin is it idles at 900-950rpm. Off idle, pressing down the pedal, cruising anywhere from 1800 -mid 4000rpms just to hear it singing.....zero issues with stumble, stutter or surge. WOT is linear. No problem with tuning the 148.
 

Users who are viewing this thread

Total: 2 (members: 0, guests: 2)


Top