Dorman ls2 intake?
#403
No other mods. So hopefully this dyno will give us a pretty good idea of how much a ported Dorman LS2 actually helps hp when coming from an LS1. The only upgrade is the port and internal post removal. Also the 92 mm throttle body of course.
#404
I also plugged the holes where the posts were with a small bolt and a nut that looked like a rivet. Put a little thread locker on it and some RTV adhesive gasket maker.
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smitty2919 (05-20-2020)
#405
Good this should make for a good comparison. I'm interested to see how well that G plus 92mm tb is going to work for you too. What size maf are you going, Id go to 85 if you re not there yet.
#407
Finished up the LS2 Dorman intake today. I also installed an oil catch can and some stainless steel braded steam lines. I used the cheap hose the catch can came with for now but will be puttig in some braded ss hoses just to look a little nicer. The install is not difficult just very tedious because everything is so hard to get to and of course the catch can and steam port hoses just added a little more time to the project. Will schedule a tune on a dyno this week to see just how well the HP gain is.
#408
Finished up the LS2 Dorman intake today. I also installed an oil catch can and some stainless steel braded steam lines. I used the cheap hose the catch can came with for now but will be puttig in some braded ss hoses just to look a little nicer. The install is not difficult just very tedious because everything is so hard to get to and of course the catch can and steam port hoses just added a little more time to the project. Will schedule a tune on a dyno this week to see just how well the HP gain is.
#409
I took car for a drive and seems to be running ok. Sounds louder and almost sounds like its cammed. It was already pretty loud with the Speed Engineering headers and true dual exhaust. I didn't get on it hard, waiting till after I take it to shop for tune on a dyno. Taking it to Performance Unlimited here in Corpus Christi, Tx. They tuned it last time when I put the headers and true duals. I believe I hit 342 hp. I will pull up the old graph toake sure.
#410
I had to grind a little on the water pump and under the throttle body. Other than that I just put a little blue thread locker on the blade screws and the bolt on side shaft where cable mounts. I had to grind a little on the opening for the IAC sensor. Other than that just mounted them and adjusted the blade adjustment screw for idle a little bit. Seems to be running ok. Will see what shop tells me when they hook it to computer. I bought the throttle body on Ebay for about $75, looks almost Identical to a WAR throtle body. I could be wrong because I don't have one to compare it to personally.
#413
So as far as fuel rails go, I know it's been said that the factory ls1 and ls6 fuel rails work, but I'm putting this intake on a 5.3 swap and was wondering if aftermarket jegs or summit ls1/ls6 fuel rails will work or the ones the WS6 store sells and will the brackets work?
Last edited by Formula81; 04-03-2018 at 03:30 PM.
#414
I had to grind a little on the water pump and under the throttle body. Other than that I just put a little blue thread locker on the blade screws and the bolt on side shaft where cable mounts. I had to grind a little on the opening for the IAC sensor. Other than that just mounted them and adjusted the blade adjustment screw for idle a little bit. Seems to be running ok. Will see what shop tells me when they hook it to computer. I bought the throttle body on Ebay for about $75, looks almost Identical to a WAR throtle body. I could be wrong because I don't have one to compare it to personally.
#417
Car is running and idling good but I don't think its reading WOT. I been driving my truck mostly until I get tune. I did realize that it used to shift hard and now is shifting way too smooth, not as agressive as it used too. On the highway if i punch it it does not down shift and pick up like it used too. I reset the IAC and TPC sensor today but didn't get to drive it. Hopefully that fixed it if not the tuner can fix it. As for making the IAC fit I just grinded the whole inner edge at an angle with my drill and a bit to allow it to fit. It went in and still sealed with the O ring it had.
#418
Ok so I did have to adjust the tps to get it at .5 and at WOT it is reading just under 4.4. Going to have to grind bump stop just a bit to get it to read 4.6 to 4.7. As far as the throttle stiffness, it is a little stiffer but not much and not enough to for me to want to mess with the springs or coils on the side of theottle body. I think after some normal use they should get a little worn in on their own. It looks like I will be taking it in for a tune and dyno on Tuesday. Will let yall know what I gained. After this I think Im saving up for heads and cam. Not really trying to make it a beast because even though I have an Avalanche I drive my TA 80% of the time.
#419
Ok so I did have to adjust the tps to get it at .5 and at WOT it is reading just under 4.4. Going to have to grind bump stop just a bit to get it to read 4.6 to 4.7. As far as the throttle stiffness, it is a little stiffer but not much and not enough to for me to want to mess with the springs or coils on the side of theottle body. I think after some normal use they should get a little worn in on their own. It looks like I will be taking it in for a tune and dyno on Tuesday. Will let yall know what I gained. After this I think Im saving up for heads and cam. Not really trying to make it a beast because even though I have an Avalanche I drive my TA 80% of the time.