14cm2 waste gated turbo housing?

[Racer Brown]

OK, here's the deal. After all the comments in my previous post, and taking into account what Big Don has said. I think I'm going to go to the 14cm2 housing. My truck just doesn't build boost as fast as I want and from what I've heard from the guys that have gone from the 18 to the 16, there's not enough difference to hardly notice. I want boost, and I want it now, not at 2500 rpm on a 2800 rpm motor! My truck will build about 22 lbs now but it doesn't do it until it's almost time to make the shift. I want it to make it down at 1500 rpm or so, where it needs it when I'm towing. So, having said all that, who has the best price on the 14cm2 waste gated housings? I'm going to modify the downpipe myself so that's not an issue, but the price of the housing is. Any suggestions?... ... ... ... ... . Racer



PS, Thanks to all for the comments etc.

 

[Power Wagon]

The 12 is MUCH cheaper normally, as you can find takeouts from 2nd gen trucks that have moved on to 14 or bigger.



the 12 will give you almost instant "snap" when you nail the pedal and the appropriate boost amount to prevent large clouds of smoke while waiting for some boost to burn the fuel.



You should also limit your boost (via wastegate settings) to the amount needed to prevent high egt and/or smoke, and no more.

 

[JMorrow]

I had a 12 put on my 1993 at http://www.wentlanddiesel.com/ and what a difference. Instant spool-up. These people at Wentland Diesel are the greatest, very good and honest. I had bigger injecters installed, new torque converter and a exhaust break put on. I will return when I need more work.



John

 

[KEENO]

Round II

Hey Racer Brown!



I agree with your final decision! The 14cm2 really is a great housing but does cost a few pennies more.



I'm also certain that this posting will carry as much energy as your last one... As you can see there truely is no perfect housing for the masses... But I think that the 14cm2 is the perfect compromise. KEENO's Opinion Only - No Flames!



As much as I love the these 12's for their instant response & Killer sound I will probably bolt my 14cm2 back in place sometime soon. I seem to cling to the 14 like "Linus" and his security blanket!



On thing to consider when going to a smaller housing is that the AFC has to be "tightened" to preserve MPG due to the increased boosted @ all RPM. I didn't adjust for the 12 that I'm currently running & it shows on the Fuel Gage.



KEENO



No great loss on trying a 12cm2 before purchasing the 14... They're cheap! Take PW's suggestion & ask for one over on the Second Gen - 12 Valve Forum.

 

[Piers]

If you're wanting a different/less exspensive way to go, install a 14 nonwastegated housing. You really only need to worry about a wastegate if you're pushing enough fuel to push the boost over 32-34 lbs. 14 wastegated housings are $350. 00, but the 14 non wastegated housings are only $175. 00.

 

[KEENO]

Hey Piers!



Does PDR stock "non-wastegated" 14cm2 Housings?



Many have asked if such a beast exists! Sounds Perfect!



KEENO

 

[Racer Brown]

Does it fit?

Piers, that housing was mentioned in the other thread but no one knew where to find one. Is this a "direct replacement" housing or will I have to modify the down pipe to fit? Also, my truck has 4:10 gears in it and I don't mind turning it to the governor in each gear when I pull off, loaded. Is this going to be a problem as far as EGTs are concerned?



PowerWagon, that 12 wastegated housing you mention, is it adjustable as far as how much boost it makes? And why do the 2nd gen truck owners prefer the larger housing? If they are a problem for them, then is it going to be a problem for me?



After the housing thing is done, I'm probably going to put a new set of injectors in it also. With this in mind, is there a problem that hasn't been mentioned that could arise from this addition later on?



I read the posts in here and from what I read, you guys think these trucks are some kind of monster. To be honest, the only real advantages I've seen with mine is that towing with my Chevy I get 8 miles per gallon and with the Dodge I get 11, and the engine will probably last longer in the Dodge. There is a slight performance increase between the two but nothing like what I read in here! Am I missing something here or what?



Thanks again all for the comments and suggestions. I know I've been long winded and these posts seem to generate a bunch of response, but I only plan on doing this one time! Whatever I put on the truck is going to stay there, unless there is some kind of "terminal problem" that dictates otherwise. I bought the truck to use and I don't plan on working on it all the time so I want to make sure that everything works together, the first time!



Later... ... ... ... ... ... Racer

 

[Power Wagon]

Re: Does it fit?

Originally posted by Racer Brown

Piers, that housing was mentioned in the other thread but no one knew where to find one. Is this a "direct replacement" housing or will I have to modify the down pipe to fit? Also, my truck has 4:10 gears in it and I don't mind turning it to the governor in each gear when I pull off, loaded. Is this going to be a problem as far as EGTs are concerned?



PowerWagon, that 12 wastegated housing you mention, is it adjustable as far as how much boost it makes? And why do the 2nd gen truck owners prefer the larger housing? If they are a problem for them, then is it going to be a problem for me?



After the housing thing is done, I'm probably going to put a new set of injectors in it also. With this in mind, is there a problem that hasn't been mentioned that could arise from this addition later on?



Later... ... ... ... ... ... Racer

The reason the 2nd gen truckers often go for the 14, is that they have a pump that's easily capable of a LOT more fuel and a LOT more rpm's. The VE pump is not as easily modified... or at least not as commonly modified, as a lot more fuel and/or a lot more RPM could easily turn it into pretty scrap metal... Pretty expensive scrap metal, that is. Once you get past about 220-250 HP, the 12 CM housing becomes restrictive at higher rpm, and the 14 provides a good compromise for moderately bombed engines. Still providing decent low-end boost and quick spooling but breathing considerably more exhaust through it.



I do believe, however, if you modify your pump to get you to 3000 or close to it at full fuel, and use something like the Lucas smokers and a turn or two on the screw, you may very well have the same restriction problem with the 12's. If you're really after serious horsepower, the 16 could remain the answer. But I'd not want to be the one who tried to make the pump do that.

 

[Piers]

I do have some [3] 14 non wastegated housings in stock. They are the same length as the 14 wastegated ones, so you would still have to modify your downpipe. As Mark said, the 14 is a good compromise, but if you're going all out I would recomend the 16 housing.

 

[Power Wagon]

Piers, is the little adapter plate for the wastegated housing easy to get?



I'm talking about the one that has the short fitting to clamp the downpipe to, instead of the elbow the 2nd gen trucks use.



When people switch from 12 to 14, or even 9 or 10 to 14, they retain that endplate, and it's the wrong one, anyway, for the 1st gen exhaust system.