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Forum: C4 Tech/Performance
02-02-2021, 11:32 AM
Replies: 6
Views: 3,010
Posted By Tuff96LT1

Drag SLicks

Any one running drag slicks on their C4 , if so what size tire and rims ?
Forum: C4 Tech/Performance
01-13-2009, 07:45 AM
Replies: 19
Views: 12,345
Posted By Tuff96LT1

Sorry Jeff and to all else. Thought I posted the...

Sorry Jeff and to all else. Thought I posted the final problem.

After further investigation and research turns out the LT1 has an inherit problem with rod bearings. Evidently the tolerances are a...
Forum: C4 Tech/Performance
11-20-2008, 05:56 PM
Replies: 19
Views: 12,345
Posted By Tuff96LT1

The injectors are the original ones that came in...

The injectors are the original ones that came in the car in 1996. Gas is pump 93 octane ( at least as they advertise )
Sound is definately a knock. No noise at idle unless you unplug the #8...
Forum: C4 Tech/Performance
11-20-2008, 05:53 PM
Replies: 19
Views: 12,345
Posted By Tuff96LT1

Manifolds are stock. didn't do anything to the...

Manifolds are stock. didn't do anything to the valve covers. If you look at these there really is not any material in the way of rockers.
Forum: C4 Tech/Performance
11-19-2008, 06:46 PM
Replies: 19
Views: 12,345
Posted By Tuff96LT1

Already did scan and the knock count goes to 20k...

Already did scan and the knock count goes to 20k plus fast. BUT oddly the PCM DOES NOT back off timing.

What could be loose on or around exhaust that would act this way ?

Haven't looked at...
Forum: C4 Tech/Performance
11-19-2008, 05:15 PM
Replies: 19
Views: 12,345
Posted By Tuff96LT1

Removed spark plugs they look perfect, Removed...

Removed spark plugs they look perfect, Removed Rockers and pushrods and I cannot see anything wrong with them other than just seem to be loose when checking their movement side to side. Valve stem...
Forum: C4 Tech/Performance
11-19-2008, 08:06 AM
Replies: 19
Views: 12,345
Posted By Tuff96LT1

LT1 Engine Noise

OK, let's play name that noise ?

I will start with qualifying the project with some info I posted in a previous thread,

I recently took a 1996 LT1 Coupe , started a major tune-up, You know the...
Forum: C4 Tech/Performance
11-15-2008, 08:40 AM
Replies: 5
Views: 384
Posted By Tuff96LT1

TB ByPass

You do not need a kit. Simply remove both lines from TB. Remove the elbow line on the passenger side entirely. Now take the line from the radiator that was connected to TB on drivers side and simply...
Forum: C4 Tech/Performance
11-12-2008, 02:39 PM
Replies: 28
Views: 6,308
Posted By Tuff96LT1

OK folks here is the outcome. 1st, thanks...

OK folks here is the outcome.

1st, thanks to everyone for your input. It was most valuable.

Yep, It was the lifter.

I installed 2 new GMPP roller lifters in cylinder #8.
I certainly love...
Forum: C4 Tech/Performance
11-11-2008, 08:18 AM
Replies: 28
Views: 6,308
Posted By Tuff96LT1

OK, I will have to go on my gut instinct on this...

OK, I will have to go on my gut instinct on this one.

After taking things apart and not seeing any visible damage or problems, I am going to replace the 2 lifters in #8 as one is the only one...
Forum: C4 Tech/Performance
11-10-2008, 04:49 PM
Replies: 28
Views: 6,308
Posted By Tuff96LT1

Lifter Pre-Load was set while at base of cam...

Lifter Pre-Load was set while at base of cam lobe.
No signs of any contact to the retainer or the valve cover. Also note the noise was not there the 1st 100 miles. Lifter is not collapsed and I...
Forum: C4 Tech/Performance
11-10-2008, 04:13 PM
Replies: 28
Views: 6,308
Posted By Tuff96LT1

LASH for a hydraulic cam That is why the...

LASH for a hydraulic cam
That is why the instructions for the LT4 Hotcam kit call for (0) ZERO lash plus 1/2 to 1 turn after. I used both the not running method of #1 TDC, adjust LASH to zero and...
Forum: C4 Tech/Performance
11-10-2008, 01:11 PM
Replies: 28
Views: 6,308
Posted By Tuff96LT1

OK, covers off. I cranked engine cold and the...

OK, covers off.
I cranked engine cold and the ticking seemed to come from #8 exhaust. Also it was pumping oil all the way back to the MidEast. All the others had the normal dribble. So I proceeded...
Forum: C4 Tech/Performance
11-10-2008, 11:38 AM
Replies: 28
Views: 6,308
Posted By Tuff96LT1

Sorry to hear your scuffed the cam, other than...

Sorry to hear your scuffed the cam, other than the scuffed cam how did detemrine lifter was bad ? Was it visibly damaged or other ?
Forum: C4 Tech/Performance
11-09-2008, 09:30 AM
Replies: 28
Views: 6,308
Posted By Tuff96LT1

Yes , springs are new, came with the kit. Odd it...

Yes , springs are new, came with the kit. Odd it does not clatter cold, but as soon as it warms even a little the passenger side really clatters loud ( seems like cyl #8). Each bank has one lifter...
Forum: C4 Tech/Performance
11-09-2008, 08:08 AM
Replies: 28
Views: 6,308
Posted By Tuff96LT1

LT1 Hotcam Install , Valve clatter

OK, folks help me out here. I just installed a new GMPP Lt4 Hot cam kit in my 96 LT1. All was well. I took my time and installed the new GMPP LT4 hotcam, kit came with lifters and lifter tray, and...
Showing results 1 to 16 of 16


 
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