MIGHTYMOUSE

iTrader: (59)

long story short, i'm on pump gas still and my boost on these runs was spiking at 18 and dropping to 13 during each pull.

peak rwhp 523.8 @ 4000rpm

peak rwtq 720.9 @ 3750rpm

*updated* heres the graph

http://people.maxweb.com/allen/uploads/turbodyno2.jpg

gogogadgetcar

good lord thats alot of torque. What octane is the pump gas around VA? Whats your timming at?

Good numbers

Tiago

iTrader: (27)

awesome tq, love it!

Got Me SOM

iTrader: (2)

how's your rearend and trans holding up? torque is off the chain!

MIGHTYMOUSE

iTrader: (59)

its 93 octane, texaco specifically..

timing is 21* at tq peak and 26 at max rpm 8.75:1 compression

rear is a moser 12 bolt doing fine, just loud..

transmission is a blueprinted t56 with all the goodies built by jim mattison.

Warbird

Mightymouse,

Awesome torque numbers, looks like you're doing pretty damn good.

Been doing some research and I think you'll be hard pressed to make any more HP in that thing. It seems that the exhaust restriction will hold you back, you'll be able to gain torque but you motor is working awful hard to do it. Working that hard can build heat and shorten the life of the motor. At 8 psi, I am running into the same problem I make 509 rwhp and 611 rwtq, I was able to kepp the torque curve rising but could make more HP even by adding boost. Simply put the drivers side manifold flow OK, however the passenger manifold is horribly restrictive being basically a stock piece. If your flow was even you would probably see the high side of 600 HP with that kind of torque.

Our solution will be to replace the passenger side with a shorty header and step down the cross-over pipe from 3" gradualy going back into the 2 1/2" drivers side manifold. we have found another restriction that we are also trying to solve.

Again nice torque, but open up that exhaust flow and you'll see some real nice gains.

BTW, I have some pics of my oil scavenging setup, once I can get them up I'll mail them to you.

Paul

gogogadgetcar

I don't know how much more you can get out of the 63. The 63's on PTE's website are all rated right around 700hp so I think 523rwhp is pretty good. If you could get 600 to the ground that would be only loosing 15% through the drivetrain and all the acceseries. It will be neat to see if anybody can get above 600 with the smaller turbo.

Warbird: if your intent on changeing the exhaust plumbing you should try to route it like INTMD8 did on his LT1. That setup was pretty slick imo. Good luck.

MelloYellow

Very nice!

Could you add some turbo notes to your sig? PTE63 Single?

RICE ETR

iTrader: (3)

yea.... i was there.... all i can say is WOW.... i wish we would have video taped it... i thought the car was going to come off the dyno.

I am almost positive if his boost would have held... he would have been at the 600rwhp mark.

I just can't believe it was all on pump gas...crazy

VINCE

iTrader: (1)

The numbers look good, but I would like to see the tq level off instead of dropping so fast.. You mentioned the boost going from 18lbs to 13lbs??? Any idea what is causing this?

Phate

iTrader: (2)

Vince,

I think that he has been trying to figure out that exact problem for a while now...hopefully he can hunt it down soon.

Dave, great numbers! I think that when you pull the heads off of there and pick up the 20cfm intake and 10-15cfm exhaust that you are probably missing then you will be perfect Those heads and the boost drop are probably really holding you back.

Again, great numbers!

VINCE

iTrader: (1)

Are you talking about the ARE heads?

MIGHTYMOUSE

iTrader: (59)

yes i have 'old' are heads on the motor, but im afraid to pull them off because they are staying down
yes its a pte 63mm single qmp kit
i bought the 63 under the word that it would flow my goal of 600rwhp with this kit. and precision claims 740 flywheel and im only around 620 flywheel now.
i have used 3 boost controlers, 2 wastegates and a handfull of springs and they all are doing the same thing, going up and comming right back down. this tells me either i have a rediculous pressure leak OR the turbo is out of a$$.
the turbo started smoking oil again and i put on a weldon scavenge and it didnt help.. it would go along with the boost drop if i was just overworking the turbo and wearing it out prematurely.. this is two failures in 8k miles

the max hp at 4krpm and the tq peak and fall is diectly related to the airflow through the motor decreasing during the rest of the run instead of increasing. if it would stay up the curve would continue in a flat stock style graph unless i hit some other restrcition

hopefully rob raymer and or precision turbo can supply me with a turbo that will hold up to the claims, or at least toss out a lender to help me find what the problem really is. i would think they would jump at the chance because (not bragging) this car has potential.

gogogadgetcar

I think you hit your goal of 60rwhp
i'm sure when they say 740hp thats under perfect conditions. If you were told it would make 600rwhp they should realy try to help you out (ie give you the turbo at cost). As far as controlling boost does it have the same spike with no boost controller on?

MelloYellow

I think you had great results, but like you are noting I think it's better to note a turbo by flow than how much HP it can make.

I think you are probably max'ing it out. I remember the 62-1 was too small when I was considering turbos. I wasn't happy with LS1 Turbo flow numbers until the 66+ range.

But if it was my car, I'd be very happy with it. How many other turbos will fit in the same spot?
Anyhow, who is that girl in your pic?
LOL!

10.5 Dave

iTrader: (5)

With your car making that much power,you should be able to better your track times by a bunch.720 rwtq should be good for hi 9s-low 10s.Please post new #s when you get to the track.I want to see what a QMP turbo car will do.

MIGHTYMOUSE

iTrader: (59)

Post deleted by MIGHTYMOUSE

RICE ETR

iTrader: (3)

he he... that's his g-friend

gogogadgetcar

I vote T-88.

MelloYellow

Damn!
Find me her twin.