Advice for 11's

[rpk250]

Finally got a decent 60' the other night, 1.9. The car ran a 12.5 @ 107.5mph. Was able to get 24 psi of boost with the alky and 110 octane without any knock. I started at 21 psi and had to turn the rod about 12 times to get it to 24 , then had to have help to connect it to the DP. Brakes would only hold 7 psi at the lights before pushing the car forward. Any suggestions for pulling off an 11 sec.

 

[rb68rr]

How much timing in the chip?

 

[TurboSlacker]

You have enough in your combo to get there. I have a similar setup per my sig below. I ran 12.6 with 2.0 60' on street tires, 92 octane pump gas and alky, 24 lbs of boost and 20 deg timing, and launched with only 1 lb of boost due to radials.

With traction, ie slicks, and tuning I think you can get there.

 

[FastRegalWE2]

do you have the soft rear shoes and S10 wheel cylinders?

 

[salvageV6]

Empty the car and trunk, get some Hoosier QTP's, or slicks, up the boost to 26-27 psi. and you should be there.

1.70 60 ft.

Loss of 50lb.s

More boost

You should have plenty of octane now to get to that boost level.

 

[SpeednV6]

You're there with your set-up. Last year, at US41, a guy with a ta49, stock set-up and Blue Tops with a 100 octane chip, ran a 11.8 a few times. He was running 18-20 psi.
With a 93 octane chip, my times are posted below with 18 psi. I was running a bit rich with my Blue Tops.

 

[XLR8]

Good air, a high timing - 26* - race chip, good race gas, 24# - 26# of boost, good tires - slicks or DOT slicks netting a 1.6 -1.7 60'.

 

[wickeds10]

Originally posted by ws6formula50
do you have the soft rear shoes and S10 wheel cylinders?

what does the wheel cylinders have to do with it? i thought all gm was the same style.

 

[BLACK6PACK]

He was pushing through the lights hence the s-10 wheel cylinders and soft shoes.

 

[turbojimmy]

Originally posted by wickeds10
what does the wheel cylinders have to do with it? i thought all gm was the same style.

S10 wheel cylinders are bigger than the stock Regal wheel cylinders and are a direct fit. They're a popular "mod" because you can hold back more boost with them - especially combined with a soft compound shoe.

Jim

 

[FastRegalWE2]

the Buick wheel cylinders are 3/4" bore and the S10 are 7/8" bore more larger surface for the hyd fluid to push on =more pressure/holding force

 

[rb68rr]

What year model S-10 do you ask for when getting the rear brakes?

 

[TurboShane]

You got every thing you need just tune it and get some new valve springs in if you haven't already. I did my 12.1 with 2 pound launch and DR's 23* chip, 23#'s of boost. If I could get traction a 11.7 or would be easy.

 

[FastRegalWE2]

Originally posted by rb68rr
What year model S-10 do you ask for when getting the rear brakes?

Rear brakes, Cottons sells S-10 upgraded wheel cylinders and soft rear shoes, about $100 total. Can launch at 10 to 15 psi boost off the foot brake if you want.

Front brakes I really like the Morse Ceramics from Autozone, $45, very little dust also. You can get new calipers after core trade-in for $15 each, and new front rubber brake lines for $11 each. So there's about $100 for the front end. Been a good investment for my cars.
'83 - '88 Non power brake system. Raybestos part #WC37644. They have a 7/8" bore vs. a 3/4" bore for the power brake application(wheel cylinders)

 

[WSLN 6]

I would be less concerned about your launch at the moment, and more concerned over where your other 70hp is. You should be trapping 113+ with that much boost.

 

[wickeds10]

thanks for the info i didnt know the wheel cylinders was bigger then the regals....also if u wanted to u could use the mopar master cylinder from a truck it has a 1 1/8 bore and will bolt on in place of the stock master.

 

[turbo buicks]

ya you can do what all these guys say even tho i havent read it but my advice to run 11s is simple, buy an 11 sec car or buy a 9 sec car and dont go hard down the track or ride in an 11 sec car i guess

 

[Nocooler]

Originally posted by WSLN 6
I would be less concerned about your launch at the moment, and more concerned over where your other 70hp is. You should be trapping 113+ with that much boost.

Exactly - your where a stock turbo should be mph wise.

Time to do a once over on the car - check everything, I'd even do a leak down test.

Why are you running race gas and alky - total over kill and not helping you. Pick one or the other - my car goes 11.7@117.55 with a simular combo on alky with a low 1.8 short time.

Jeremy

 

[strikeeagle]

1. You don't need an insane launch - it just trashes the car. Unless you hate your car, be content to leave at 5 PSI.

2. Yup, you don't need alky and 110 - at the strip I suggest you use the latter.

3. Sure sounds like somethings wrong with your wastegate set-up if you have to put a gazillion turns into the thing to get just a bit more boost.

4. Your car is underperforming - straighten it out before you throw any more parts at it - you ought to be able to go 115 with that car right now

 

[rpk250]

I was concerned about the 107 trap also. When I tune with a Gtech I usually trap at 117mph. I was suprised with the dropoff. I know they are not that accurate but that is alot. Where should I look for the power loss. I do have a 95000 mile trans, could that be a problem? Otherwise the car runs great.