Cammed LQ9 breaks 403whp 411ftlbs.
Nov 17, 2013 | 09:17 AM
#11
TECH Enthusiast
Joined: Oct 2006
Posts: 642
Likes: 21
From: Euless, TX
Appreciate the information on the y-pipe. I may consider doing the same to mine, just wish I wouldn't have already had the rest of my exhaust done with 3" piping, muffler, cutout, and electric cutout. Would be a lot to replace all of that now
;-)
As far as the intake goes, feel free to do anything you feel will give you more power.
But my guess would be, that with a stock 85mm MAF and a 78mm throttle body, there shouldn't be much of a gain from a 102mm (4") intake tube (unless you mean something else) naturally aspirated. With nitrous, who knows...
On the other hand, its cheap enough that I would do the same if I were you also.
;-)
As far as the intake goes, feel free to do anything you feel will give you more power.
But my guess would be, that with a stock 85mm MAF and a 78mm throttle body, there shouldn't be much of a gain from a 102mm (4") intake tube (unless you mean something else) naturally aspirated. With nitrous, who knows...
On the other hand, its cheap enough that I would do the same if I were you also.
Nov 17, 2013 | 11:13 AM
#12
My Titan runs an Airaid MXP4 intake that uses their massive 7" opening 2,200 cfm filter and a velocity stack to narrow it down to the stock MAF opening then widens back up to a 4" tube before going through a 74mm TB. I witnessed gains of nearly 20 rwhp and airflow gains over 20 gms/sec with this arrangement. I am running a 3.5" tube on my Express with the old L31, 78mm TB an aluminum body LS1 MAF and large cone filter. Saw substantial airflow gains in my datalogs and combined with e-fans a large power gain.
That isn't to say I'm not wrong, and it would be great for me to be wrong in this case. And I would definitely do the same since its a cheap upgrade.
WIth a power adder I could see more flow through the same given opening, because of the extra suction/compression of the air flow (for lack of a better term).
But again, I could very well be wrong. Being as how this would make it easier for me to make more power also.
;-)
Nov 17, 2013 | 12:20 PM
#13
there will be gains with the 4in intake setup Im just not sure how much. Both trucks I put the 4in intake on gained quite a bit of noticeable power but both also threw lean codes at part throttle. That tells me there is power to be had. Ill have to fine out what the dyno has to say about it
Nov 17, 2013 | 01:56 PM
#14
That's good gains from exhaust work!
To bad you didn't lay the old dyno over the new to tell exactly where it gained at.
Your exhaust is done exactly how I been wanting to redo mine
To bad you didn't lay the old dyno over the new to tell exactly where it gained at.
Your exhaust is done exactly how I been wanting to redo mine
Nov 17, 2013 | 06:09 PM
#15
there will be gains with the 4in intake setup Im just not sure how much. Both trucks I put the 4in intake on gained quite a bit of noticeable power but both also threw lean codes at part throttle. That tells me there is power to be had. Ill have to fine out what the dyno has to say about it
The MAF should see the amount of air going through, and in closed loop should adjust the amount of fuel to stoich in all situations but Power Enrichment mode.
Unless maybe the injectors aren't large enough to compensate for the extra air.
Nov 17, 2013 | 08:57 PM
#18
Stock 317s. I want to get ahold of some 243s, mill them and then do some mild porting myself. Possibly go a lil bigger with my cam at that point. 224/228ish. For now just enjoying what I have and I think next on my list is some 4.56s front and back. I think the truck will come alive once I do.
