IS350 this morning

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06-23-2014, 10:12 PM

#11

Stone629

6th Gear Member

Join Date: Feb 2007

Location: North Carolina

Posts: 11,302

Quote:

Originally Posted by S8ER01Z

Well things make even more sense... track rental was not a good time. I have a number of mechanical things to look at now to figure out what is going on.... tune was spot on...AFR was 12.7 - 13.0 during my runs..timing at 28 degrees peak (26.5 - 28 during pull)... no KR. Ran 13.4 @ 107 on a 2.1 60ft in 2700DA (13.0 @ 110 MPH for those interested).

I was hoping the cam was off a tooth but I took a picture when I did the install and it's perfect... the only thing that changed was the lifters and now some people are wondering if the 7.425s are too long with the LS7 lifters... will be swapping the stock ones back in to see if it makes a difference. Honestly shocked that is didn't spank me now. I barley had enough for him.

You don't need LS7 lifters anyway. That could very well be your problem, but I'm really shocked your able to run 28 degrees and not get any ping at all. Makes me think your running pig rich or something, idk..something is off

06-23-2014, 11:56 PM

#12

crash

BrandofPoop

Join Date: Jan 2007

Location: Bay Area

Posts: 3,835

I feel your pain on e.t.'s not falling your way. I have some gremlin in mine atm :/

06-24-2014, 06:13 AM

#13

S8ER01Z

6th Gear Member

Thread Starter

Join Date: Sep 2006

Location: NC

Posts: 5,565

Quote:

Originally Posted by Stone629

I meant I will be changing the pushrods... the LS7 lifters are the factory replacement (in face I believe they are the only part number now for all LSx GenIII) and I really don't want to pull the heads again. I have good 93 in it (In fact I get KR with gas from nearly every other station)... wideband is showing good numbers, no detonation... I've even had a tuner look at everything and he can't find any problems. *sigh*

Quote:

Originally Posted by bluebeastsrt

What did the entire slip look like? Are you losing power up top or is it something down low?

It seems rather flat everywhere.... here is the slip. I mean it was hot and crap air but still doesn't seem right. The wife ran a tune only 2008 C5 Z06 and it went 13.0 @ 110 to her 13.5 @ 107.... for direct comparison sake. She said he would be even through the gear and just after the shift he would pull and then even out again.