Is airgap worth the money?
Legend
Joined: Nov 2014
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That cam is designed for idle to 4800 RPM, a range the kegger is really good at. The airgap actually produces LESS power/torque below 4000 RPM than the stock kegger..... With your combo, I don't think spending that kind of money to get LESS power is such a good idea...... I could see doing the kegger mod though.... Unshrouding the runners inside the manifold will get you a few more ponies, though, it also tends to move the power band up a couple hundred RPM.....
Of course, the dyno test I am looking at for those results (on Hughes website.....) were on a stock tune, stock motor. With a custom tune, it *might* be better, bang for the buck? I don't think its there.
Of course, the dyno test I am looking at for those results (on Hughes website.....) were on a stock tune, stock motor. With a custom tune, it *might* be better, bang for the buck? I don't think its there.
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Veteran
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Veteran
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Yah I have not down the plenum repair and that's kinda why I thought it maybe usefull. I just really want a custom tuner . The truck is sound but still is a dog towing
Legend
Joined: Nov 2014
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Most are even my stock Cummins was
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Veteran
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Haha good to know. I'm getting pressured by a good friend to get a duramax but I love this truck to much to give up to deep in lol
Legend
Joined: Nov 2014
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That's on you lol the best truck I had with towing was a 4th gen 2500 single cab short bed with the 6.4L Hemi
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Veteran
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Haha good to know. I'm getting pressured by a good friend to get a duramax but I love this truck to much to give up to deep in lol
Record Breaker
Joined: Jun 2011
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From: Bismarck, ND
Late to the thread here are my thoughts on having run both. The airgap builds power at 3000rpm well, especially towing with O/D off at 3000rpm it would just take off when you rolled into it. However with a 4000lbs trailer I tried to pull on to a busy road up hill, not the steepest mind you but steep enough and it could only get to 2500rpm even at full throttle. Good thing the hill was short and 4 lanes, got a lot of dirty looks. I was dumfounded, on flat ground it would have not been an issue I just couldn't get the rpm for the airgap to take over. Keep in mind although not frequently I had towed 8000-10000k with a few 5.9s and didn't have that issue. The day before I sold the truck I swapped the kegger back on and a new thermostat (180). Felt like the same top end as the airgap (air gap also had a 52mm tb on it) with a 195 t-stat with much better bottom end torque. I have a v10 now but I have a wrecked durango I plan on getting back to and doing the mods with a kegger. I have been dealing with Marty at Utahsome performance on my v10 and he has some data and work on the kegger that's quite interesting. As well as some dyno testing with low lift tight lsa cams that make big torque and decent hp. Hope this helps with your decision. My red 5.9 durango had the runners shaved off in the kegger and that pulled like a dream. Now as I restore/fix it I am doing heads, cam, and probably a stroker crank, and tricked out kegger. Gonna take a few years to get done but should be a good combo.
6.4 just came out when I left the dealership and I managed to drive a few. Fantastic truck motor. Glad it got the 8spd finally.
6.4 just came out when I left the dealership and I managed to drive a few. Fantastic truck motor. Glad it got the 8spd finally.
Thread Starter
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Veteran
Joined: Apr 2019
Posts: 497
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Late to the thread here are my thoughts on having run both. The airgap builds power at 3000rpm well, especially towing with O/D off at 3000rpm it would just take off when you rolled into it. However with a 4000lbs trailer I tried to pull on to a busy road up hill, not the steepest mind you but steep enough and it could only get to 2500rpm even at full throttle. Good thing the hill was short and 4 lanes, got a lot of dirty looks. I was dumfounded, on flat ground it would have not been an issue I just couldn't get the rpm for the airgap to take over. Keep in mind although not frequently I had towed 8000-10000k with a few 5.9s and didn't have that issue. The day before I sold the truck I swapped the kegger back on and a new thermostat (180). Felt like the same top end as the airgap (air gap also had a 52mm tb on it) with a 195 t-stat with much better bottom end torque. I have a v10 now but I have a wrecked durango I plan on getting back to and doing the mods with a kegger. I have been dealing with Marty at Utahsome performance on my v10 and he has some data and work on the kegger that's quite interesting. As well as some dyno testing with low lift tight lsa cams that make big torque and decent hp. Hope this helps with your decision. My red 5.9 durango had the runners shaved off in the kegger and that pulled like a dream. Now as I restore/fix it I am doing heads, cam, and probably a stroker crank, and tricked out kegger. Gonna take a few years to get done but should be a good combo.
6.4 just came out when I left the dealership and I managed to drive a few. Fantastic truck motor. Glad it got the 8spd finally.
6.4 just came out when I left the dealership and I managed to drive a few. Fantastic truck motor. Glad it got the 8spd finally.