SPRAYED 01

iTrader: (22)

Im running 13lbs on a precision 67mm turbo on a qmp or tti street kit. Im going to be upgrading the kit towards the end of the season to run about 19psi through a 78mm.

My question is untill then since i have a 3bar map sensor and a boost controller and enough fuel,should i try bumping it up to lets say 17-18lbs now.

Alex

DeltaT

iTrader: (5)

Why not? Might get you to low 10's...

Jim

SPRAYED 01

iTrader: (22)

If the turbo was maxed out at that psi can that cause damage to anything?
That would be the only thing im worried about.

hellbents10

iTrader: (10)

Keep bumping it a couple psi at a time at the track, you will see when more boost does not yield better times.

Pro Stock John

iTrader: (34)

What did you dyno at that boost level? Was your car kinda lazy on the 10.8 pass, I was thinking you would have run a little stronger.

Boost yours up to 16psi and let's go race over on Peterson Ave.

SPRAYED 01

iTrader: (22)

It pulled 500rwhp&480ftlbs at 13psi on an unlocked 3k stall through a 370gear 9inch on a mustang dyno. The 10.8 was a very easy pass,i pulled right off the highway put the slick on back with no skinnies and ripped it twice then they kicked me out. Both hot laps with 2.5 hours of traffic driving before. Im thinking under better conditions maybe a 10.6 at the Grove.

John,
Let me bring my video camera and ill run you down Pererson any day.After this week because im on 24/7 call and dont have my car.

Pro Stock John

iTrader: (34)

I think it would fun as long as we don't get busted. Heck Jimmy P lives around by us too, he's got a new combo coming together. His buddy Pete does too.

I'd find out what the turbo you have can support, but I'm thinking you should go 10.5 as you sit right now off the top of my head.

SPRAYED 01

iTrader: (22)

John,
Im going to try out Byron in a couple weeks. Have you ever been?

Pro Stock John

iTrader: (34)

For sure, I've gone 9's in the Formula there.

SPRAYED 01

iTrader: (22)

How are they on tech there? I still dont have a cage. Also,i just ordered the aem electric boost controller. So after i get my 3bar tune done ill be cranking it to about 17-18lbs.

I read an article in a new thread on backpressure with smaller turbos. What do you guys think about a 67mm on a stock cube ls1 at 17-18psi. Am i asking for trouble?

SStolen

iTrader: (22)

YES! That 67 is maxed out at 500rwhp through that drivetrain on a Mustang dyno. If you want more power just go straight to the 76mm. Let me know when you're ready to pick one up.

Websy21

iTrader: (34)

Yup I agree, the 67 is pretty small especially if you crank it up I too agree with a 76, perhaps the tc76 best bang for buck. Than you can crank it up to 18 psi no probs

Pro Stock John

iTrader: (34)

I never ran 10's at Byron with out a 6 pt roll bar, so not sure if you will get booted after one run or a few runs. I've had my 10 pt for a long time.

LS2Camaro

iTrader: (5)

I am stuck at 15 psi here unless I go 2 bar or better(I think). I will be bumping up the boost once I learn how to use the power I have

SPRAYED 01

iTrader: (22)

Okay so i ended up getting the aem boost controller a 3bar map sensor and the new tc78mm turbo from drturbo. This way i can crank it up alittle and be a tad bit safer. Im thinking im going to gain alot even leaving it at 13psi but u never know.

Websy21

iTrader: (34)

Yes, even at the same boost number you should see a significant increase in power since that turbo is WAY pasted its efficiency. You should make the same power at lower boost as well. Let us know how she does!

LS2Camaro

iTrader: (5)

I am sure you will also see more power under the curve. Post a dyno when you can.

Websy21

iTrader: (34)

Yes, I agree and forgot about that until after I posted but none the less you should be greatly happy with the new results!

black98ws6ta

iTrader: (77)

Is the tc78 you got a oncenter housing or do you plan to modify the kit? Or even build a completely new kit?

SPRAYED 01

iTrader: (22)

For now im just going to bolt it on to this kit and go to town. I do realize that my kit isnt the most effective to todays standard but im doing really well with it now and i think this new turbo will just make it better. Josh at Kentucky turbo is working on making a similar log setup for me with bigger primaries and a bigger log itself. I like how simple my setup is now and want to stick with a similar design.