Best recipe for a 12sec 1/4

[GNbythebay]

I have a 1986 grand national with the following "mods". Aftermarket CAI 42lbs injectors with turbotweak chip hot wire kit with 340 Walbro pump alkycontrol cat back exhaust and rjc throttle body plate. I think that is all. I am looking for a fun driver but I wanna have a 12sec 1/4 time. I planned on buying a downpipe next but I am unsure so my question is what is the recipe to have a 12sec grand national with the mods I already have what else would I need to get me in the 12sec 1/4. I ran my car once at the track when it was close to stock and ran a 14.1.

 

[TURBOELKY]

How much boost were you at?

 

[Pronto]

Drag radials.

 

[V6sleeper]

You should be in the 12s already with that stuff w/higher boost and traction, the down pipe will help if you want to go further then 12s, next after that would be a ta49/44 to run low 12s high 11s without stressing it...and don't forget the tune.

 

[GNbythebay]

How much boost were you at?

stock boost. Not sure onhow much boost i can run now with what i have done. i was told i would be safe around 18psi with the alcohol

 

[3.8L V-8 eater]

Turn up the boost!!!

 

[3.8L V-8 eater]

As long as you have a good chip that is burnt for alky turn up the boost a little at a time monitoring knock till you get in the 20 to 23 range....If you can 60ft at the track you will go 12's

 

[fast NY Six]

Do you have a scanmaster? I have a similar set up as you. except for ta-49 turbo. stock downpipe, stock air cleaner, stock maf, stock exhaust, dutt neck, 235 street et mickey thompsons, 12.4

 

[TURBOELKY]

.....

 

[GNbythebay]

Do you have a scanmaster? I have a similar set up as you. except for ta-49 turbo. stock downpipe, stock air cleaner, stock maf, stock exhaust, dutt neck, 235 street et mickey thompsons, 12.4

yes i have a scanmaster

 

[Grumpy]

Boost gauge or just using the stock one for now ??

 

[Rafs-T-Type]

What's the run look like? MPH, 1/8th and 60'?

 

[TURBOELKY]

Boost gauge or just using the stock one for now ??

Oh shit it's grumpy!! Where have you been??

 

[GNbythebay]

Boost gauge or just using the stock one for now ??

Vdo boost gauge

 

[Grumpy]

Oh shit it's grumpy!! Where have you been??

needed a vacation from Buicks. Goin back to late 60s cars . Off course still have the Mazda/Buick and playing with Melissa/Russ's . I have to get rid of a lot of parts. Don't think Ill have another Regal. Unless I get in a mood an the right car/color comes along

 

[Turbo Keith]

Check on RJC's site , Jason has some listings as far as low 12's to 11's and so on .

 

[robertf]

You should be in the 12s already with that stuff w/higher boost and traction, the down pipe will help if you want to go further then 12s, next after that would be a ta49/44 to run low 12s high 11s without stressing it...and don't forget the tune.

Which is actually more desirable, TA49 or 44? I have the TA49.

 

[earlbrown]

You're spraying alky for no reason. Start turning the boost up and go from there.

 

[Mr.Spool]

I have a 1986 grand national with the following "mods". Aftermarket CAI 42lbs injectors with turbotweak chip hot wire kit with 340 Walbro pump alkycontrol cat back exhaust and rjc throttle body plate. I think that is all. I am looking for a fun driver but I wanna have a 12sec 1/4 time. I planned on buying a downpipe next but I am unsure so my question is what is the recipe to have a 12sec grand national with the mods I already have what else would I need to get me in the 12sec 1/4. I ran my car once at the track when it was close to stock and ran a 14.1.

Tune,tires,and seat time.for 12 sec passes I like a shift kit for the trans.

 

[SpeedRacerX]

In my first and only trip to the track this year, got my times down from 14.1 to 12.2. The keys were traction (heating my DRs enough) and the 60-footer (launch). Took me 3 passes to go from 14.1 to 12.2 and then 3 straight 12.2s. I'll be in the 11s as soon as I turn up the boost further.
So, my recommendation to the OP is traction, launch, seat time and a properly safe boost level. Know what your car is doing at all times.

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