Fastest times on stock turbo and drag radials

[squeeze87]

Hi
I'm interested in how fast some of you guys have gone on a stock turbo and drag radials, NOT slicks. Lookin for mph,et,tire size, and mods used. I'm having a few issues here and am curious as to the potential of the stock turbo. I want to know what you have actually done, not what some guy's brother-in-law said he saw!
thanks!

 

[Quick6'n'-K.C.]

always willing to help-

stock turbo, intercooler,injectors 2 3/4 downpipe 2 1/4 testpipe with SUMMIT hooker cat back- walboro 340m, 20 psi of boost,
sunoco 14 gallons of sunoco 104 non leaded fuel,
255/60/15 BFG NON dragradial tires best 60 ft 1.90
88* out

12.70 at 110.75 with a jay carter 23* timing streetchip-

guy here is running stock turbo, intercooler with a bigneck,and 009's with a hemco and THDP-
CAR weighs 3400 and he weighs 145
11.80s at 110-111mph with slicks and 1.60 sixty foots-

hth

 

[squeeze87]

Dang I just dont know where my top end is!! Granted I am running a 3200 stall converter which i purchased for a larger turbo. I lock the thing up for the whole run but still can break 100 mph! running 20 psi, all the usual mods, race fuel too. car just stops accelerating after 3rd gear. I run 13.1 to 13.4 at 94-97 mph all the time, havent been able to figure this one out yet.

 

[Quick6'n'-K.C.]

what exhaust system are you using?

do you have a test pipe?

what kind of chip are you using? and what fuel?

how long do you wait between passes? what is the temperature outside-

list your mods-

 

[tim87tr]

Originally posted by squeeze87
Dang I just dont know where my top end is!! Granted I am running a 3200 stall converter which i purchased for a larger turbo. I lock the thing up for the whole run but still can break 100 mph! running 20 psi, all the usual mods, race fuel too. car just stops accelerating after 3rd gear. I run 13.1 to 13.4 at 94-97 mph all the time, havent been able to figure this one out yet.

Valve springs are weak/stock would be my guess. That made a huge difference on my GN, the T still has stock valve springs and is faster due to the 60'. I'll be shooting for low 12, high 11 on stock parts on the T sig. Installing larger wheel cylinders at this time. I had some good advice that 112 mph is the limit for the stock injectors, which would be the lower 12s or high 11 with a good 60'. You would need to watch the fueling/O2 close on a scan tool. Tim

 

[UNGN]

What chip? A 93 chip will do that. Thrasher 108 is a pretty good chip for the stock setup. Use a scan tool to see what your RPMs are at 100 mph during a run. They should be less than 5000 (4700 locked up).

If it's over 5000 RPM @ 100 mph your converter isn't locking properly. A stock turbo/intercooler/injector car isn't going to want to pull much over 5K.

 

[squeeze87]

mods

Mods are walbro 307 pump, hooker exhaust, MaxEffort 16 pos., THDP, adjustable fuel pressure regulator, K&n filter. 009 injectors and scanmaster. converter is a PTS 3200 LU and its locked at the line so it locks in 2nd gear. 275/50 BFG drag radials w/18 lbs. intercooler and turbo are stock.I have been corresponding with Steve Y about tweaking the settings on the chip so thats covered. I went 106 mph last year and the only change is the converter.I left the trans in manual low on the first run of the year and forgot (duh) and hit the rev limiter. maybe whacked springs?? thanks for the input guys!

 

[Quick6'n'-K.C.]

convertor!!!

PTS 3200 LU and its locked at the line so it locks in 2nd gear

if that is all you have changed, then that is what id point my finger at!!!

 

[squeeze87]

converter

Yeah, but if its locked how can it be the problem?? I know its locking because I can feel it when i flip the switch. I really need to log the rpm drops between gears to see whats happening. Hard to to do with out tubo-link or directscan.

 

[fly89gta]

TTA850 ran an 11.95@113(something like that) on a stock engine(turbo,IC,injectors etc)

 

[gn1220]

Ran a 12.20 on ET Streets with everything in my sig + valve springs. Looking for 11's with some tuning help(Hey Bryan!), alcohol and the 3" D/P when the weather cools down A LOT.

 

[GNX Guy]

About 7 years ago or so, I ran a 12:03 at I think 111 or so (been a long time. Car was all stock except, CPP mag iv chip, Adjustable regulator, stock fuel pump with Bosch puller pump, 116 octain fuel, approx 21 lbs boost(don't know gauge only went to 20lbs back then, open exhuast, k&n, and M&H racemaster G60 DOT tires., oh, And I locked the converter on the big end. Valve cover never off, stock injectors, stock converter, stock turbo, stock IC

This is the way we used to do it in the olden days. I know Scott Keller has gone 11:80 or 11:90 with a very smilar setup.

Now my car runs 10.60's with 18lbs boost, stock block, iron head motor and a few upgrades

Joe

 

[UNGN]

Originally posted by fly89gta
TTA850 ran an 11.95@113(something like that) on a stock engine(turbo,IC,injectors etc)

I think TTA89 went 11.66@116 with his "stock" TTA, but they are a slightly different animal than a TR. The have steeper gears, 25% less aerodynamic drag and slighly better heads, which will allow for more mph.

Every stock motor/intercooler/injector/turbo regal should be able to go at least low 12's@110 with proper tuning using recipe mods and race gas and a lot have dipped into the high 11's.

The stock combo likes high timing chips (vs. the low timing high / boost strategy) If the converter is locking and the rpms are high, maybe a slipping transmission? Your combo should pull through 100 mph like its nothing, as it's right around the usual 4500 rpm HP peak of a stock motor with 26" tall BFGDR's. Are you sure the gears are 3.42's?

 

[LikeMy6]

With 275/50 Bfg-DRs I was able to get 12.0s@114 using a internally bone stock engine that had 32000 orig miles only mods were Valvesprings,009 injectors,FPregulator,hotwire,volt booster,reds 100 chip,Magnecore wires,a Free Kenne bell stainless 2.5" cat-back,homemade cold air kit,art carr shift kit,gutted cat,adjustable wategate. thats all. turbo,downpipe,throttle body&uppermanifold,torque converter were all stock. using 100 octane and 23#s of boost 5# launch and 1.7 60'
I would change the valve springs most definately I could completely compress one of the original stock ones bare handed! thats how weak they are.If you still are having problems as stated above the converter could be why.It could be too loose for the stock turbos performance envelope, being stock converters are only like 2600 stall.and also when it locks up because its a better converter than stock its probably not slipping like the stock one does so that will put more strain on the motor again pulling the motor down farther in rpms and causing the rpm to rise slowler because the engine isnt make the power it needs to function correctly with this converter.
I personaly have a 9.5"-5 disc vigelante right now still using the stock motor but with a larger TE45a along with other mods. I cant lock up the converter or it will break my motor! the converter will not slip at all! it grabs so hard under WOT in 2nd that it shudders the engine like a bucking Bronco until I unlock it.in 3rd or the top of 2nd I can lock it but it drags the motor down so bad and the RPMs rise so slow I lose about .5 sec and 5-6MPH. If the motor was upgraded w/t better heads and cam then it would lock up like it did when it was stock.
Good Luck

Later

 

[ULYCYC]

12.4@113 Bone stock with drag radials,shimmed fuel pump and (Modern Muscle)Mike Lichts 100 chip. This was around 1994.

 

[squeeze87]

Thanks for the info guys, Likemy6, it makes sense what you are saying,converter unlocked is too loose for stock turbo, yet locked it drags rpms down. I noticed when testing the lockup switch that it takes about 1-2 seconds to lock after it shifts into 2nd but 2-3 shifts while locked, I guess this is normal??

 

[ULYCYC]

The Precision converters lock hard. It may be too much to lock up in 2nd with your setup. Try locking it up at the 2nd/3rd shift.
What RPM's are your crossing the traps at?

 

[squeeze87]

What RPM's are your crossing the traps at?

Not sure, I have been letting it shift by itself and monitering KR on scan master. I know I need a tach.

 

[squeeze87]

thought cam was flat......NOT

I thought I had a flat lobe but it turned out I checked off of a lifter that that had bled down Removed intake and checked all 12 lobes w/ an indicator and the are fine and cam is stock. I guess I'll check valve springs out. Do any of you guys think it might be ignition related? I think the coilpack/ignition module is original(116k). Could it still run fine yet under high boost be losing power? Car launces like a beast but under hard load (3rd gear) Just craps out, doesn't miss or anything like that. Thanks for any ideas!

 

[blackbuick87]

If its not missing popping leave the ignition alone. This has not been mentioned yet so I'll throw it out there: You are using drive and not o/d right?

Another minor thing to look at is when running 20psi or more, close the plug gap down a little to around .032, it will lessen the strain on the ignition system.

I dont have any times for you with my combo, but tomorrow I am hoping to get some. Good luck