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t-66 vs t-70

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matt87

Member
Joined
May 25, 2001
Messages
1,127
how much more hp is a 70 worth over a 66 at say 25 psi (all the boost i care to push). i'm currently out of ideas make enough hp for the 10's.
 
you got more & better parts than I do....you should be into the 10's with less than 25 lbs boost (I am...and I am an idiot!)

don't upgrade anything until you get what ya got to go!

My first question is, do you have a trans brake? If not, how much boost can you launch with? What is/was your best speed in the 1/4? If you can run 122 or so, you can run 10's (enough power)

you have a ME chip......you must spend some time at the track tuning....lean at launch, egt's in a comfort zone at WOT....easy to say, not so easy to do, but definitely doable!

if I can help you, I would be glad to try since our combos are so close!

lemme know
 
Ditto what AZGN said! You got some of the best parts that money can buy! My combo with a V2, 63, 55's, 9" AC, 218 cam and ported heads went 11.52@118 on pump gas and a RA-93 chip sputtering on a 1.78 60 ft. With proper fueling, race chip and 22-23 PSI it should have busted the 10's every time. These bigger turbos take more PSI to really get in the sweet spot where you pick up big power gains. You step up in HP from a 66 to a 70 isn't worth it IMO. These guys kept telling me the 63 had more in it and they were exactly right! The 66mm wheel should have enough to go mid 10's all day long. If my 61 doesn't bust into the 10's I will be pretty mad so that 66 should scoot! Figure out where you are loosing it. Good luck!
 
Azgn, hehe first time at the track with the ME was terrible, didnt know much on how to use it so it ran poorly. bright side was it did hold boost 5 psi easy and coulda done more if i wasnt going with the tree. i never really considered a trans brake but i may look into it. my tranny has colene clutches, raybestos blues, billet servo and such so it is doable. the car neted a 1.69 shrt time with 5 psi. on the subject of our combos, where do you shift at? i've been doing it at 5500 for the track and dyno. i'm going to race hopefully next wekend.
 
Originally posted by azgn
you got more & better parts than I do....you should be into the 10's with less than 25 lbs boost (I am...and I am an idiot!)

don't upgrade anything until you get what ya got to go!.....

.....you have a ME chip......you must spend some time at the track tuning....lean at launch, egt's in a comfort zone at WOT....easy to say, not so easy to do, but definitely doable!

if I can help you, I would be glad to try since our combos are so close!

Woody is FAR from an idiot! He is an excellent driver and tuner. He was not born this way as he spent lots of time and effort learning how and what to do.

My reason for saying this is even with all the "good" parts, it takes time, tuning and effort. Looks like your 60' times have room for improvement. It will just take more "seat time" and collecting data to get you into the 10's
 
regardless of what Nick says, I am still the headgasket king of AZ (or I was untill recently dethroned)

Matt, first of all you have to "drive it like you stole it"...a 5 lb launch is major girly girl stuff...if you aren't yanking the front tires in the air, you aren't tryin'

to give you an idea, in full kill I leave at 4,000 rpm off the brake...that is anywhere from 15-20 lbs boost...get the picture?

so, I would suggest a little testing to see just how much boost you can hold and if it is under 10 lbs, go to plan "B" (trans brake)

I need to ask what kind of tires you are using, because without "real" slicks (I run MT 28X9's) you can ignore all of the above.....maybe sometimes we don't give out enough details for folks to understand what it takes....DR's and 5 lb launches will NOT get it!

I shift at 5600 (leaves at lot on the table, but so what...) and lock the converter at 5500...usually go thru the traps at 51-5200

unlocked, that would be 56-5700
 
"regardless of what Nick says, I am still the headgasket king of AZ"

Hmmmmm,
so that's why you get bent out of shape when I mention Orlando running 40lbs of boost and not blowing headgaskets LOL!!! J/K
;) ;) ;) ;)
 
Azgn, i have 28x10 et streets and 275-60 bf drags, no full slicks. wow you leave with a ton of boost! sounds good to me. i cannot lock the converter as its a non-l/u unit.
 
just FYI, I also have 28X11.5 ET Streets and my 60' times suffer about .1 when I use them....regardless of what many say, they just do not work as well as "real" slicks(at least on my car)...I cannot leave as hard...however, there times when I just don't feel like changing tires and leave 'em on

the non lock should be fine....it is prolly tighter on the top end than my l/u unit
 
azGN,
I'm just curious as to what other mods you have besides the ones in your sig.??? I still haven't hit the 10's yet with all the crap I have too. But I haven't opened her up yet either with the current combo due to street tuning the felpro and a broken TC during my first pass with this combo.
I REALLY want to break into the mid 10's, so I built it for 9's (that's my theory on how to do it). And when the TA block comes out, I'll feel a LOT better about turning up the boost to 30 psi.

Derrick
 
Matt,
Which car are you trying to get into the 10's?? The first or second GN? You have a very similar setup to me (as far the major items) with GN #1. And I'm also trying to break into the 10's.

Derrick
 
let's see.....other stuff......Ross pistons, steel caps, trans brake, PI l/u 3600 stall, ME chip, 62mm throttle body, 1.65 T&D roller rockers, DIS-4,30 spline Mosers with Ford bolt in axles, cold air intake, 90/10 shocks, no front sway bar, boxed rear arms, poly bushings, ATR rear bar, air bags, new springs all around, power plate, heads flow 212 (1.77 valves)

car weighs 3712 with me in it (and has 54000 original miles..all accessories including air still work).....I always run under 25 lbs boost and keep the egt's under 1500, so there is plenty left in it...the way I figure it, I am making close to 600 hp and don't want to rebuild it again

if times are corrected to sea level, I have many in the 10.7 to 10.9 range (4- 11.0x passes in Las Vegas at 120+ last year
all correct to 10.8 or less) so your goals are realistic if you are willing to push it a bit......

the time in my sig is uncorrected, at 1300' and 70 deg air
 
Taz, its the first car in my sig that i'd like to see 10's even be happy with some 11.00s. i'm more worried at this point about my launching skills and optimizing my ME chip.i know its got more that the 450 hp i've made in it. i too want to do this in a full weight, everything working(including air) gn. i did the simple weight loss stuff, front sway bar, spare tire and jack, aluminum wheels but i refuse to yank the ac or anything else, the car is too nice. the other car is a street car and has proven itself uterly relaible. same turbo, engine, tranny for three years since its been rebuilt.
 
Originally posted by azgn
let's see.....other stuff......Ross pistons, steel caps, trans brake, PI l/u 3600 stall, ME chip, 62mm throttle body, 1.65 T&D roller rockers, DIS-4,30 spline Mosers with Ford bolt in axles, cold air intake, 90/10 shocks, no front sway bar, boxed rear arms, poly bushings, ATR rear bar, air bags, new springs all around, power plate, heads flow 212 (1.77 valves)

car weighs 3712 with me in it (and has 54000 original miles..all accessories including air still work).....I always run under 25 lbs boost and keep the egt's under 1500, so there is plenty left in it...the way I figure it, I am making close to 600 hp and don't want to rebuild it again

if times are corrected to sea level, I have many in the 10.7 to 10.9 range (4- 11.0x passes in Las Vegas at 120+ last year
all correct to 10.8 or less) so your goals are realistic if you are willing to push it a bit......

the time in my sig is uncorrected, at 1300' and 70 deg air

Woody, Woody, Woody, I told ya you should've come up here with Nick and the Gallina's! There first day had our patented "below sea level" weather. Marka couldn't hold the boost on the line because she was making more power than normal because of the good air.

We'll convince you and Nick to get up here again with a few more cars next time! :D
 
Originally posted by azgn
let's see.....other stuff......Ross pistons, steel caps, trans brake, PI l/u 3600 stall, ME chip, 62mm throttle body, 1.65 T&D roller rockers, DIS-4,30 spline Mosers with Ford bolt in axles, cold air intake, 90/10 shocks, no front sway bar, boxed rear arms, poly bushings, ATR rear bar, air bags, new springs all around, power plate, heads flow 212 (1.77 valves)

car weighs 3712 with me in it (and has 54000 original miles..all accessories including air still work).....I always run under 25 lbs boost and keep the egt's under 1500, so there is plenty left in it...the way I figure it, I am making close to 600 hp and don't want to rebuild it again

if times are corrected to sea level, I have many in the 10.7 to 10.9 range (4- 11.0x passes in Las Vegas at 120+ last year
all correct to 10.8 or less) so your goals are realistic if you are willing to push it a bit......

the time in my sig is uncorrected, at 1300' and 70 deg air

Woody, Woody, Woody, I told ya you should've come up here with Nick and the Gallina's! There first day had our patented "below sea level" weather. Marka couldn't hold the boost on the line because she was making more power than normal because of the good air.

We'll convince you and Nick to get up here again with a few more cars next time! :D
 
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