[nomedia="http://www.youtube.com/watch?v=0Uu3EFUCY_M"]Whipple Lightning on the dyno‏ - YouTube[/nomedia]
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So what would be my best bet to make some decent power on this stock bottom end? Although im pretty sure i will eventually go built somewhere down the road, it just wont be anytime soon.
Just swap pullies and be done with it until i go built? ditch the JLP exhaust (man that was hard to even type) ?
Ok dont get pissed for me asking this but that exhaust cost you like 2 grand right :shrug: why didnt you put that toward a built block if you intend on going that way eventually anyway?
I would think to put at least a 2lb back on if not a 4lb to get you back up to your previous numbers ( or at least try too ). Im going built too and Ive been told I was dumb for getting this whipple put on FIRST like Ive done :bored: but I dont care, I wanted it so I got it. Im guessing thats the case with you and your exhaust :beer:
lol at everyone saying 3" is to large for a blown 5.4
for a STOCK headed/camed one yea 3 inch is overkill
Please show me the graphs of the same truck in the same conditions that makes more power with a 2.5" over a 3". And I for one, don't like having to buy a second exhaust because people spread rumors that dual 3" is too much for a blown v8.
The proof is in the first post, The engine exhaust has to have a certain amount of scavenging. The 3" pipes and bigger tube headers on the comp R are over kill for stock heads and cams. there isn't enough air being pushed out to produce the proper amount of scavenging.
Don't get me wrong I love the 3" Comp R exhaust and will be putting it on my L soon. And if the OP is going built, then the exhaust is one thing he doesn't have to worry about down the road.
I'll make this short, there is no "proof" in the first post. It's quite amazing how you have absolutely attributed the his exhaust to have low power which could be a million different things if in fact he did even have low power. It is extremely common for people that run NA v8's to run dual 3" and still make more power while sacrificing some torque.
We although are talking about a supercharged v8. The main difference between this an a NA v8 is the combustion chamber pressures and the extra exhaust gasses that are expelled as compared to a NA engine. We are also talking about a truck that is making any where from 500-600 hp depending on the boost he is running.
To the OP, your numbers look slightly low for the boost your at but not anything I would call home about.Many things come to play when trying to decide how a truck might dyno less than another. Ambient dyno room temperature, humidity, cylinder compression, the dyno you are on, slipping transmission, timing, HEAT SOAK, and many other factors.
Please show me the graphs of the same truck in the same conditions that makes more power with a 2.5" over a 3". And I for one, don't like having to buy a second exhaust because people spread rumors that dual 3" is too much for a blown v8.