Going to help a friend iron out the tune in his car this weekend and could use some input on the one that's in there.
Specs on the car:
99 Hugger Z28
(Engine)
11:1 418 CID (4.07x4.00)
Kateck Resleeved LS1 Block
Kateck Billet Main Caps;
ARP Main Studs;
ARP Head Studs;
GTP Stage III LS6 ported heads flowed over 337 cfm
Custom Ferrea SS 2.080/1.60 valves.
TR custom solid roller cam; 248/[email protected], .647/.647@114lsa
FAST 90 mm Intake;
90 mm nick williams TB;
(Drivetrain)
Spec Stage IV-F Clutch;
Spec aluminium flywheel;
B&M ripper shifter
Moser 9" rearend
detroit locker
35 spline gundrilled axles;
Aluminium center section;
4.30 gears; narrowed 2.5";
(Exhaust)
TR 1 7\8" long tube headers ceramic coated;
mufflex 3" y-pipe w/4" collector;
magnaflow catback exhaust system;
3" QTP electric cut out;
The car does NOT have a MAF on it.
He's been having serious driveability issues with it since getting it back together from correcting other problems. Lots of surging, he didn't say it's had problems dying, just doesn't like to settle down on an idle at all and surges all over the throttle range.
Crazy part is the car put down over 500rwhp and went 10.70's with this tune!
Just want to get a jump on this and try to have something better to stick in it come Saturday. I'll be bringing my wideband over to use during this.
Do you guys think I'd be best off just modifying this one or starting fresh?
Any recommendations on where to go with the idle to try to get it to start settling down?
I apologize for the lack of a log, just haven't had a chance to get one out of it.
Thanks for any input!