Smarty 2.11 / 4.11 D level 7 and level 9 no difference 376/777 with stock HY35......

Stacked my old Van Aken 3.1 recent run put me at 417/831 and now ive been running the HTB2 for the last month.

Dynojet


AFE HTB2 62/12 4" exhaust


EGT's with just the smarty unplugged the Van Aken towing have been perfect no temp issues runs 38-39 psi all day long never gets over 1200

with HY35 i had EGT issues when pulling grades with heavy trailers so the upgrade in turbo has served me well, opens the door for later mods though im really happy with the lack of smoke like none at this moment so the next mods might just be the ATS manifold and a CFM+ intake and i might just call it good. Dont think i'll install the F1 helix 2 i got sitting here, i think for the work there wouldnt be much gain for me without bigger sticks. It's running so good im thinking i'll focus my HP building on my 4bt now

 

This is just Rediculous. There's one guy on here that's putting a 305 motor the test. He's already got a 325 motor above 800HP. He is putting an 06 head on the 305 though. Do you all think the head will even the odds a bit? With comparable mods, like twin pumps, big sticks, twin turbos, etc.??? Will the 305 put out the same or close to the same numbers or are the electronics just not comparable even after the Smarty?

 

know of a couple 305/555's running in the 600-700 ballpark. just not mine

 

Oh, and if you put a 610 head on a 555 engine, do you still run 555 injectors or can you run 610 injectors?

Stupid question i'm sure. But, I'm still new at this.

 

You run the biggest pair of fluxs you can get LOL.

 

You still run the 555 injectors. It has to do with the spraying angle and pattern of the injectors vs the piston crown profile.

You can change the head, but your piston crowns stay the same.

 

The 325 head has a few improvements over the 305, including a little better flow, but was made to handle the extra heat provided by the 3rd injection event too. (Like sodium filled valves for instance) They have better valve seats too. The improvements though are not so great as to suggest that everyone with a 03-04 head must run out and get the 05 head, but it is better. Most of the increased power potential of the 04.5 and up engines does reside in the electronics. (This is why Smarty only goes up to 130 hp in 03-04 vs 170 in the 04.5 and up) This is also why eliminating the 3rd injection even causes a significant loss in hp. The newer engines also have better injectors (body is the same... tips are much different) that can flow a little more fuel too... There are other differences... those are the major ones pertaining to power.

 

There is no difference between the 305 and the 325 head they are interchangeable the difference in power between the 325 and the 305 is just in the electronics and the programers just can't seem to get the right fuel curve to match the 325 motors.

Every thing is the same except for the electronics

 

i belive the turbo is alittle bigger and the injector tips are different

 

You are correct.

 

Yes you are correct on that I forgot about that but with what they were talking about guys putting 325 heads on the 305 there is no difference they are the same

 

speaking of heads, when i had a mustang putting port heads on the car was a big help... is it the same on these trucks... was thinking about getting a extra head and having it ported?????????? good idea or shouldn't waste my time

 

Ported heads can help. But since these are forced induction systems, the gains realized will be very small compared to the cost and effort. Usually, this is done only when the head is off anyway for another reason, like fireringing, replacing the HG or something else. Unless you are building an all out motor, I don't think it is worth the $$$ or time for the return you will get. If you do get a spare head, I see you have an early CR, try to get an 05 head. They have the better valve seats and flow as I posted above.

I have to respectfully disagree with cranked dodge above. The heads are interchangeable and are mostly alike... but to simply suggest they are the same is misleading and incorrect. There are subtle, and important, differences.

 

well why we are talking about the two cr's if you took 1 of each motor "305,325" put the same turbo, same injectors, same electonics on the same setting, same rims and tires and same tranny wouldn't the numbers be almost the same