ivan_key

Have a mustang with a ls6 T70 turbo, was running 4.5 ps1, turned it up to 9 and don't really feel much of a difference, is that normal?

black98ws6ta

iTrader: (77)

Nope. Is the tune good? Do you have good valvesprings in the motor? More details about your set-up?

ivan_key

Speed inc tuned it for 8-9 ps1 2 months ago, its a stock ls6, so had 243 heads, ls6 cam, ls6 intake, ls6 yellow valve springs. h

Bumpers

iTrader: (10)

You should def feel that

kmracer

iTrader: (1)

are you SEEING 9psi? are there any boost leaks?

ivan_key

No boost leaks, I didn't look at the boost gauge, slot the rubber piping that I have turning into the throttle body is really soft and when I give it gas it sucks down if that would make a huge diff

Fbodyjunkie06

iTrader: (10)

This is your problem.

kmracer

iTrader: (1)

^ so yes, you have a boost leak. hahaha.

ivan_key

Lol ya I guess so, its 3 in to 4 in tube, where can I get one that's harder so it doesn't suck shut

ivan_key

By the way it still has some power. Brand new tires broke loose on me today at 70 on the highway! About wet my self

kmracer

iTrader: (1)

if its sucking under vacuum its ballooning under boost. anyways, rps or modular turbo will be able to help.

ivan_key

It does suck down till about 4-5k rpm, I understand what your saying about it ballooning, but it doesn't balloon when parked and I rev it all the way up, I'm guessing it will when its under load when I'm driving it

Busy Mopper

iTrader: (4)

yes...

SPRAYED 01

iTrader: (22)

Get a new intake elbow although I don't think that's the problem. Also that's a very small turbo. As you go higher in boost you will notice a smaller and smaller gain due to back pressure

ivan_key

I'm going to order a elbow for it and see what happens, so what turbo should I get, it has a t4 flange. It made around 600 rwhp with the t70 and 9ps1 on the dyno, I'm pushing for 700rwhp. Also not sure how much boost the ls6 will hold, has arp rod bolts and head studs

pwrtrip75

iTrader: (8)

You had that on there and a shop tuned it with it on there? hmmm.

What about your tranny? They sometimes regulate power... usually not a good sign though.

ivan_key

Speed inc tuned it but probably didn't notice the weak rubber elbow, also it has a stock 4l60e for now

Fbodyjunkie06

iTrader: (10)

I would at least get a tranny cooler and shift kit at the very least until it burns the clutches up and then build the **** out of it or swap in a 80e or TH400. I wouldn't think it would be the turbo that is holding him back to much at only 9 lbs. At 14-15 maybe, but 9 no. If the elbow is getting sucked closed at all it's not going to matter how big a turbo he puts on it.

ModularTurbo

iTrader: (14)

If the tune is speed density then a small boost leak wont be noticeable.

KILLER-LS1

iTrader: (18)

im assuming its a silicon elbow? if so, get rid of the elbow. get a 90degree piece of 3" aluminum pipe and do a single 3" straight silicon piece and then a straight 3-4" or whatever size you need on the other side of the metal elbow.