I couldn't agree more. My 370 TC76, .96AR, 215/.566'' shifts at 5500RPM, I gain nothing by running it up any farther. Hitting the traps @6500RPM with 3.73's and 28'' ET's, getting ready to change to 3.42's.

 

In a race car/truck you want to be as close to 1:1 as possible. For a street vehicle I like to see 1.5:1 as it will come on quick and feel lively on the street. Over 2:1 is really no good.

To get these numbers where they need to be is a matter of turbine wheel/housing and design of the hot side piping and the down pipe. Exhaust back pressure on the DP side is really bad too.

 

stock48, I have seen the same thing and shift them at 5500 too. I am sure you will like the switch to 3.42's.

 

can i just put a fitting in the hot side and hook it to my boost gauge? i thought about going to a bigger exhaust side, turbonetics web site says they make a 1.51 divided. my downpipe is 3" then it merges to a 4" exhaust. but i'm thinking about going dual 3" to stop the rattles.

weird things happened when i swapped to the ls6 cam. one thing that happened is my high boost (switch on) matched my normal boost (switch off) i had to crank the controller itself up alot to get almost back to where my high boost was. but it doesn't seem to want to go any higher than 12.8psi. i can't get it to 13psi. keep turning the **** and it just won't go any higher.



if the turbo setups like mine won't climb to high rpm then why do people go with such high lsa and long duration cams? those want to pull high rpm. wouldn't it be better to go with like a 224ish cam on a tight duration. that way it still has no overlap at .050 and would peak good on torque and be done making power at the same time as the turbo?

 

First I do not think T-Netics makes the housing anymore even though they list it. I would have a couple of them if that was the case.

Yes just put a fitting in the exhaust side, and run a couple feet of copper tubing to soak up some heat, then hook up your boost gauge.

I would love to do a 224 on a 112 back to back with a LS6 cam. Get it on the dyno, do the swap and report back lolz.

 

you honestly think it would be good or just joking around? and i do know they have a1.15 divided but i'm not sure how much better it will flow than a .96 open tang.

 

I think it may work pretty good, it might be worth 40hp at your boost level for all I know. I have not tried it, and that bums me out honestly.

 

well i'm going to be building a motor soon for a guy and he has offered to buy me either the pro-flo xt edelbrock intake or a cam. i want to know what will yield the most power. that the reasons for all my questions about weather its the intake or cam.

 

I think you will see more power from a cam then the intake.

 

but now to decide which one. thunder said the torquer vs 1. i was thinking the 224/224 on xfi lobes on a 112+4 comes to 0 overlap at .050 and 49* at .006. too much?