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Ok this is not on my GN but on my 1997 Chevy Tahoe. A few weeks ago I was driving it and the alternator quit charging. I figured it was the 17 year old Autozone alternator so I took it back and got a new one. They did not even test the old one because the bearings sounded bad when turning it...

What is the recommended clearance between the piston pin and the rod? This is a K1 rod with a .927" floating pin. Current clearance is .0014" on the loosest one. I can get them re-bushed if needed but my machinist is saying they should be more like .0005" which seems a bit tight for this...

I have a slight 200-300 RPM flare at both 1-2 and 2-3 shifts. See Powerlogger screenshot below. Current motor is a BONE stock longblock with a 6265 turbo, headers, and 3.5" DP. Transmission is fully built with billet everything and a 9.5" PTC non-lock. I would not think a stock motor would...

Ok, I think I know what I did to cause this but I guess my real question is are my injectors fixable? I put some 120's in a year or so ago and ended up blowing a headgasket last November. I pulled the motor to work on it. I was planning on putting it back together quickly so I removed the...

So I have my stroker motor apart and have not picked a direction to follow with the rebuild and I want to drive the car so I bought a 47000 mile stock long block from someone on this forum. My plan is to spend minimal money on this motor and just get it in the car and get it running so I can...

I blew a head gasket last year and finally finished tearing down the motor. I got some water in the oil when the gasket blew. Bearings do not look too good. About 1000 miles. Crank was turned during last refresh and still looks perfect. Line bore was done when installing the steel center...

I have done a ton of searching and reading on here on the topic of what valve spring and seat pressure to run with a Comp Cams 218/212 hydraulic roller cam and 1.65 roller rockers on ported stock iron heads. General consensus seems to be Comp 941 or PAC 1201 at a seat pressure in the range of...

I think I know the answer but here goes. Recently freshened motor, cometics, arp bolts. About 20 psi boost no knock but suddenly got the loud farting sound from under hood. Lifted immediately. No water in oil, no oil in water. Car runs fine but when I pull the driver side valve cover...

Ok, here goes. Whenever the weather is warmer than 80 degrees out my car always seems to get up to 200 degrees no matter what. I know 200 is not that hot, my new Tahoe quickly goes to 210 and stays there every time I drive it but it is supposed to. I figure I should be able to get my car to...

Just got my SD2 in and have a question. The timing shown in the log on the powerlogger console is much higher than what is shown in the spark table. Am I missing something? For example the timing advance shown in the powerlogger console at 14 psi boost is 27.5 and it is around 20 in the PLC tune...

I have the original wheels off my 87GN sitting in the garage and need to get rid of them. Wheels are fairly rusty and have an old set of tires on them. I have not driven on them in 5 years. Someone local make offer. FREE, someone come pick up Deal Made

Comp Cams 3129 timing chain set new in box $35.00 shipped - SOLD ATR ? 4 gauge console pod in excellent condition $50.00 shipped - SOLD Used cam sensor came off running car $45.00 shipped - SOLD Used set red stripe injectors came off running car P/N D1163AA $50.00 shipped PRICE REDUCTION on...

I recently was trying to verify my timing and followed the instructions to put the car into diagnostic mode by jumping pins A and B on the ALDL connector to fix the timing at 15 degrees. The check engine light flashes when I jump the pins but the timing does not change. It just stays around...

PRICE REDUCTION Set of used 60 lb injectors less than 3000 miles - SOLD. Choice of TT 5.6 chips for 60 lb injectors and E85 or race gas- $30 each shipped. Race gas chip SOLD, E85 chip still available. Used RJC power plate for stock manifold and plenum - SOLD. New in box set of Total Seal piston...

Selling my Precision Vigilante billet 9.5" single disk 3500 rpm stall lock up torque converter for 2004r transmissions. I bought it new in 2008. Rebuilt by Precision in 2011. Less than 3000 miles on it since then. Less than 20 passes and NEVER locked at WOT. I took it off the car last year when...

Selling my Precision Vigilante billet 9.5" 5 disk 3500 rpm stall lock up torque converter for 2004r transmissions. I bought it new in 2008. Rebuilt by Precision in 2011. Less than 3000 miles on it since then. Less than 20 passes and NEVER locked at WOT. I took it off the car last year when I...

These roller rockers were in the motor that my car had in it when I bought it 10 years ago. I have been using them for about 4 years since they are in good shape. I think they are T&D Machine but I am not sure of the ratio. The exhausts look like a higher ratio and have .5 hand engraved on...

I know these are Comp Cams hydraulic roller lifters but not sure which model number. I have searched on this forum and think they are the 885 but am not sure. These came with a roller cam kit back in 2010 from Cottons and the only paperwork I can find says Comp Cams pro magnum lifters and it...

I think I pushed out number 6 today. I have never blown a head gasket before but it sounds like what you think a blown head gasket would sound like. 24 psi boost with very minimal knock retard and it started making a very loud whistling squeaking sound on the passenger side of the motor. Got...

I have been looking at the hp calculations for E85 but how would I estimate hp for the crappy E65 I have been getting at the pump here in Houston? I don't have any new track times since I switched to E85 so I don't know my current trap speed. I got the tune closer now but am out of injector...