Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.

New Posts Contact us

Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

[Alloytec] OTR CAI w/MAF, Idle and Surging Issues, 2004 VZ SV6 AUTO

dlucre

New Member
Joined
Aug 12, 2005
Messages
25
Reaction score
0
Points
1
Age
35
Location
Sydney, Australia
Members Ride
1992 VP Executive 4sp Auto 5L V8
Hi Guys,

I purchased and installed this OTR CAI.

When pushing the engine using this OTR CAI I have very noticeable gains in performance and torque, as well as an awesome sounding induction roar! I really love it!

However, The issue I have with it is that when the engine is cold the revs bob up and down making it difficult to drive out of the driveway, etc. Once it's warm, idle is fine at 800rpm. But, under normal driving conditions between 1800-2000 rpm it surges a little bit too. Revs seem to be unstable and it makes for a pretty rough gear change if it changes around there too.

My question is, have I done something wrong? I know the MAF is VERY SLIGHTLY misaligned. Only by a few degrees, but it's not perfectly straight. Would that possibly be causing the issues I am having?

Or, do you think the engine needs a tune (I am thinking through Castle Hill Exhaust) to correct this and make better use of the cold air coming in?

If I am going to pay the $900 for CHE to do the tune, I am going to combine it with Extractors and Exhaust too. But, just means it will be a while before I can afford to do that.

Looking forward to hearing what you guys think.

(Photos are NOT of my install. They're from the auction.)
 

Attachments

delcowizzid

on holiday
Joined
Jul 8, 2008
Messages
6,983
Reaction score
428
Points
83
Location
NZ
Members Ride
в∞ѕтεכ √&
probably from the maf being to close to the throttlebody i dont see any room for a maf in them pics post pics of your install so we can see it
 

monaro327

New Member
Joined
Jun 4, 2004
Messages
794
Reaction score
4
Points
0
Age
34
Members Ride
VZ Skaife Senator & VY SS UTE
your car will never run right with the otr. you've got even more problems then my otr ve sv6.

the maf can't handle being that close to the throttle body.

your setup means that the maf no longer has the mesh screens in front of it to help it read the incoming air.

the pcv system is connected in a way that in draws air into the motor that the maf doesn't read.

the pcv system would be spraying a nice oil film over the maf.

i did back to back testing of an otr on my ve sv6 they lose about 5rwkws with the otr maf doesn't like being that close to the throttle body.

have a nice day.
 

chp

New Member
Joined
May 24, 2009
Messages
2
Reaction score
0
Points
0
Members Ride
Cts
I have a cadillac cts with a vvt 3.6L which is essentially an alloytec. I ported my maf and did some tuning with hptuners. I had a problem with surging at idle (I didn't even drive the car), and I was able to resolve the surging with the tuning. So, I think your tuner should be able to handle your issue.
 

ltz jeddah

New Member
Joined
Jun 9, 2009
Messages
2
Reaction score
0
Points
0
Members Ride
lumina
this intake need maffless tune or regular tune???
thanks man
 

monaro327

New Member
Joined
Jun 4, 2004
Messages
794
Reaction score
4
Points
0
Age
34
Members Ride
VZ Skaife Senator & VY SS UTE
no mafless tune for alloytecs mate unless your willing to fork out for a motec.
 
Top