Mrrat1SS Posted March 23, 2017 Author Report Share Posted March 23, 2017 he's been working on this last couple years 1984 15th Anniversary T/A 468 Cube Pontiac built by the kids. Ported heads 244 @ 50 .500 lift cam. It should be about 450-475 horse. They just finished putting on the front clip Monday. It's been off the road 20 years. Quote Link to comment Share on other sites More sharing options...
Infernis Posted March 23, 2017 Report Share Posted March 23, 2017 how does your truck sound/feel with the headers? Did you get it tuned? Quote Link to comment Share on other sites More sharing options...
Mrrat1SS Posted March 24, 2017 Author Report Share Posted March 24, 2017 I had a bassani cat back on it already, headers gave a little more throaty/deeper sound. I think a tune will be a big step in performance. It has a little stumble/hesitation off idle, and when its at light throttle cruise and you mash on the gas. Quote Link to comment Share on other sites More sharing options...
Downeast Johnny Posted March 24, 2017 Report Share Posted March 24, 2017 I had a bassani cat back on it already, headers gave a little more throaty/deeper sound. I think a tune will be a big step in performance. It has a little stumble/hesitation off idle, and when its at light throttle cruise and you mash on the gas. Fresh tune should clear that right up. You need the tune to get max benefits from your headers anyway. Personally; I would have ordered the upgraded tune before I installed the headers and installed both at the same time. Quote Link to comment Share on other sites More sharing options...
Mrrat1SS Posted March 24, 2017 Author Report Share Posted March 24, 2017 I have a shift kit to install also.........gonna do that and the tune next..........have to take baby steps with the dough!! Quote Link to comment Share on other sites More sharing options...
Infernis Posted March 24, 2017 Report Share Posted March 24, 2017 I have a shift kit to install also.........gonna do that and the tune next..........have to take baby steps with the dough!! lol I know how that feels Quote Link to comment Share on other sites More sharing options...
Mrrat1SS Posted March 29, 2017 Author Report Share Posted March 29, 2017 CEL came on.........have Zippy sending me a new computer. I should have it sometime next week. Truck has a slight stumble off idle and at part throttle cruise when you hit the gas. Exhaust has a little gurgle to it also, figure running a little on the lean side IDK for sure. Will report back when the new tune is in. Quote Link to comment Share on other sites More sharing options...
Infernis Posted March 31, 2017 Report Share Posted March 31, 2017 Nice, I just got my headers installed Wednesday and tuned. Sounds really good with the stock exhaust. Quote Link to comment Share on other sites More sharing options...
Mrrat1SS Posted April 8, 2017 Author Report Share Posted April 8, 2017 still waiting for the new tune. replaced O2 sensor and temp sensor. Going for re-inspection after I get about 100 miles to get the computer reset. Quote Link to comment Share on other sites More sharing options...
Mrrat1SS Posted June 12, 2017 Author Report Share Posted June 12, 2017 New tune is in! I had an issue with plug wires and a broken ground strap. New wires installed and I fixed the strap. Runs great! I don't like that it kicks down to first if I mash the gas at like 30 mph. It won't kick down from OD with light throttle. Just wants to gradually accelerate so I have to hit the pedal more until it kicks down. Very minor! I will address it when I make the next mod. Quote Link to comment Share on other sites More sharing options...
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