Dutt neck, good, bad, or ugly?

[Dewey]

I was considering a dutt neck since I'm too cheap to buy a new IC. Are there any real gains here or am I just hacking up my stock IC and wasting time and money? I have a few minor mods but for the most part I'm stock. Not looking to get too far from an original appearance under the hood.

 

[Matt Sando]

best bang for your buck. You won't be dissapointed. About a 25hp gain.

 

[Steve]

I agree, very good bang for the buck. I went 11.30's with a TE-62 and stock intercooler with a dutt. neck and 009's.

 

[BlackMetal]

Just installed one this past weekend, AWESOME mod. Boost comes in a lot earlier. I took the easy road and bought an IC that someone had already necked though.

 

[Blaze]

Great bang for your buck, you may want to consider Alky as another great bang for your buck.

 

[84GNwith87eng]

Plan on getting my dutt modified ic on the mail next week, can't wait to use it with my new te44 and 50#'s

Can you really expect a 25HP gain? Is it better to get a bigger up-pipe to utilize all that extra air?

 

[NEARING]

Can you really expect a 25HP gain? QUOTE]
Yep.

 

[bison]

Can you really expect a 25HP gain? QUOTE]
Yep.

Yes if you turn up the boost and rev to about 5500rpm. Otherwise i wouldnt expect much. It reduces the pressure drop above 4000rpm alot. If the compressor is putting out 29.5psi at the outlet of the turbo, and the pressure at the outlet of the intercooler is 25psi you have a 4.5psi drop. Assuming the cooling efficiency of the intercooler stays the same if you reduce the pressure drop to .5psi you will pick up a good 15-20hp in a 300hp engine. Every 10 degree drop in inlet ar temp eqauls about 1% more power if the fuel is there to support it. So with the neck assume the pressure at the outlet of the intercooler is 25psi youve just taken a lot of work from the turbo. Perfect compression of air equals about 13 degrees F increase in temp. Id expect around 20 degrees F per psi for most examples at 60-70% efficiency. Thats a reduction of nearly 80 degrees before the air even goes through the intercooler.

 

[84GNwith87eng]

Thanks for the info. Would you reccommend a larger up-pipe as well now?

 

[BlackMetal]

I'm no expert, but I'd say a bigger up-pipe would be pretty useless, the outlet of the intercooler is still going to limit what comes out. A bigger up-pipe would just give the air more room to spread out, thus losing velocity and possibly pressure.

 

[NEARING]

Worth while mod for sure

my own results of a few years back