I know this is like beating a dead horse. But I'm so happy with the results, I had to post. These are the results after swapping from a SSV to a Crawford manifold. The first dyno graph is after my first tune with a TN kit and SSV. To me this is low numbers to be had even on a DD dyno.

Well few months later I finally got my hands on a Crawford manifold. Being I was so busy, I finally had a chance to take my car back to Forged to recheck the tune and A/F ratio (wideband not working) Sharif made a couple quick adjustments and here the results on the last two sheets showing A/F and boost. I showed boost for I had a open dump added also. Pretty steady. I was just happy with the results.

 

Thats pretty good gains. I'm questioning whether you made more of your power from the open dump or the Crawford plenum. Open dumps add decent power depending on the set-up. On a 996 turbo with flash, intake, and exhaust, adding open dumps netted 30whp. Please no flaming. If you go to
6speedonline, you can find the thread there. I was blown away at the power this mod made. Nice either way!

 

As I understand it - open dumps help with spool characteristics more so than power increases. Although I'm sure you saw some gain by way of adding the dump, I think that it probably helped your spool up a bit more. In any case, 5500 rpm showed a nice jump in peak power which honestly could be either the plenum or the dump, but at the end of the day it doesn't really matter. You've got full spool by about 3700 rpm and I nice smooth graph which looks like it pulls strong and clean. Congrats

 

That's my understanding also.

 

so the before and after tune were both done by sharif?

 

That's right, they were. The first tune he said that's all he could do. I defiantly believe that. He said the SSV was holding me back. The second tune there was much more for him to do. Made several passes and a couple of adjustment. The very first pass netted 351hp.

 

if the first pass netted 351, why does the dynographs show 348? did he detune the map? Do you have the 351 dyno? not like 3whp matters much.

also, just for fun i tried to overlay a rough dyno of mine to yours. Even tho were very close in peak power, your area under the curve is 40-50% more then mine. You kill me in the middle of the power band. I did a bit of extrapolation, id have to peak at 420whp to totally encapsulate your power curve. Turbos for the win! SC aint bad either! Love my linear power.

 

Great gain!!!

EDIT: I agree with thawk and alberto below that the less backpressure in the exhaust, the more power your turbo is going to make... both probably contributed. More importantly, I'll bet you're getting much more even airflow to all the cylinders with the Crawford plenum.

 

An open dump is bypassing all the exhaust gas that would of gone into the downpipe to the atmosphere. This is reducing backpressure in the exhaust system and adding power. I switched to open dumps on greddy car and didnt really tell a difference in spool up.

 

I agree the dumps are helping. Regardless your car is faster, and thats always a good thing!

 

i really dont feel like the open dump yields more power, just a lot more consistent boost pressures in any kind of weather.

the SSV manifold hurts anything under 12 psi but really started to come through on higher boost runs we have done.

have fun with your newfound power and keep the car straight. you really cant beat the instant TQ with the Turbonetics kit...

 

That's was just the last run we printed. You have to think that was after some heat soak.

 

congrats, looks great. did you get a video of the run?

 

I have some very short runs. Not worth showing. Couldn't get my recorder to work right. fIrst time I've used this one.

 

i was there when his car on the dyno getting some adjustment . nice gain man btw this is billy i was talking to you .

 

I remember you. You were far from home though.

 

did you notice any different for the gains ? once again your car is hot in person whewwww.

 

Congrats on the new numbers!

 

Did you mean to say before? It felt about like the gains you see. But I didn't think it could be at the same time. I thought it was just in my head, being that the mods I had added were not something that produces that kind of power.

I just think the SSV was hurting me so bad, that the Crawford gained back what the SSV was hurting, plus the additional power the Crawford was supposed to give. Also the open dump might of freed up some power. But I'm not going into that.

 

I've only seen one car that legitimately appeared to make gains due to the manifold. Other than that, they've all lost power when compared tuned before/after. I've also seen them crack multiple times (like most other kinetix products).

Nice gains, though. I'm sure it's nice to know your car is making the power it's really capable of.