Black04SS Posted May 31, 2004 Report Share Posted May 31, 2004 July issue of ChevyHiPerformance has a "LS1 Intake Flog". Good read. Doesn't it seem odd that peak torque is at a higher RPM than peak HP? Must be a misprint. WP Link to comment Share on other sites More sharing options...
deezel Posted June 1, 2004 Report Share Posted June 1, 2004 I believe BigTex pointed out that their hp and tq numbers appear to be reversed. Otherwise an interesting intake comparison. Link to comment Share on other sites More sharing options...
zippy Posted June 1, 2004 Report Share Posted June 1, 2004 yeah, the graph didn't hold up with the numbers. Link to comment Share on other sites More sharing options...
BigTex Posted June 1, 2004 Report Share Posted June 1, 2004 Exactly. Look at the graph overlay. The truck does fine down low and in the nid range, but in the upper range, you start seeing it fall off. This comparison was on a completely stock engine. WIth an engine running heads and cam, I'd expect the LS6 /LSx intakes to really pull away from the truck intake in the upper rpms. The stock motors have shifts in the upper 5000 rpms, while a heads cam motor may need shifts in the mid 6000 rpms. I was glad to see the truck holding in that well down low. Link to comment Share on other sites More sharing options...
zippy Posted June 1, 2004 Report Share Posted June 1, 2004 i think the truck does have alot of room for improvement with a cutting tool after loking over the pictures from a while back on the other board. (i believe posted by you tex?) Link to comment Share on other sites More sharing options...
Black04SS Posted June 1, 2004 Author Report Share Posted June 1, 2004 Well,,doing the math; HP = Torque X RPM, the numbers didn't "add up".LOL WP Link to comment Share on other sites More sharing options...
02denali Posted June 1, 2004 Report Share Posted June 1, 2004 i figured as long as parish is doing good with the truck intake im not even going to worry about mine. Link to comment Share on other sites More sharing options...
BigTex Posted June 1, 2004 Report Share Posted June 1, 2004 Forced induction and naturally aspirated are two completely different animals. Jamming 14psi down an intake would completely distort flow numbers. Runner length, tuned ports, scavaging, etc... would have less effect on the system. parish8 is also running a stock exhaust manifold... does that make them better than long tubes? Yeah Zippy, those were my intake pictures. Link to comment Share on other sites More sharing options...
02denali Posted June 2, 2004 Report Share Posted June 2, 2004 no but i doubt that a small cam and bolt ons are going to outflow the truck intake are they. Link to comment Share on other sites More sharing options...
zippy Posted June 2, 2004 Report Share Posted June 2, 2004 i think the truck intake makes good poewr, but has room for improvemet with other intake choices. on the other hand, i think i'm going to try to modify one soon and put it on a test truck for the hell of it. i think there is alot of room for improvment on that truck intake. i do agree though, boosted applications don't much care about intake design as much as it does port volume and chamber size (what i call the area before the port begins for lack of an easier to explain term). the car intake would spool up quicker on his truck, but overal hp would be fairly close to the same. Link to comment Share on other sites More sharing options...
BigTex Posted June 2, 2004 Report Share Posted June 2, 2004 no but i doubt that a small cam and bolt ons are going to outflow the truck intake are they. No they wouldn't, but then your definition of a small cam and mine is slightly different. You wouldn't catch me installing a stock LS1 cam as a performance mod: http://www.silveradoss.com/forums/index.ph...?showtopic=3573 If you want to get 275hp to the rear wheels, stick with the truck intake. If you want 375hp.... Link to comment Share on other sites More sharing options...
02denali Posted June 2, 2004 Report Share Posted June 2, 2004 i want to try a ls6 myself. just dont wanrt to lose much and then have to redo everything again. im wondering if it will help me. with a 216-220-525-532-114 6400 1-2 and 6200 2-3. long tubes are on the way. lemme know your opinion big tex. thanks. Link to comment Share on other sites More sharing options...
BigTex Posted June 2, 2004 Report Share Posted June 2, 2004 Hopefully the magazine will do a quick followup article and test all the intakes again on a motor with at least a fair sized cam. Heads and cam would be better. Then we would have a little glimpse of the stock power profile and modded profile for each intake. Did you see the actual actual pictures from the magazine? Low and mid range power were fairly close with each intake. When the rpms got high towards peak hp, you could see the truck intake start making some distinct power dips that the LS6 / LSx intake didn't have. Since that was on a stock LS1 cam, power started falling quickly for all intakes. If it were an aftermarket cam that could pull to the mid 6000s, it looks like the truck intake would be in trouble. Thats just my 2 cents, so I hope to see a followup article. One of the only examples I can point to is Blacksheep on the tech site. He was kinds secretive about his stuff, but I was able to get some info out of him. He was running a LQ9 motor with ported heads and a mid 220s cam. He dynoed in the 380ish range on the truck intake, then after swapping to the LS6 intake, he put down over 410 I think. He claims to have gained several tenths with only the intake swap. With his cam and ported heads, the added power from the LS6 intake gained from 5000 - 6500 made a difference. Last half of this thread: http://www.ls1tech.com/forums/showthread.php?t=125261 Link to comment Share on other sites More sharing options...
02denali Posted June 2, 2004 Report Share Posted June 2, 2004 well to tell you the truth i think it would help.that is where the cam seems to pull the best. and if it is extra flow from around 5000 and up then thats 1400 rpm's that i will benefit with it. and maybe it will help with my third gear in the quarter mile to. thanks. Link to comment Share on other sites More sharing options...
SuperSport Posted June 3, 2004 Report Share Posted June 3, 2004 does anyone know how much $ a stock LS6 manifold is or what the part # is ???? Link to comment Share on other sites More sharing options...
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