What mod should I do next IYO?

[DOUNVME]

86 GN, approx 1200 miles on rebuild, shift kit in trans.

JE forged pistons, Competition valve job with matching intake bore by Champion Race Heads, RJC bulletproof HG's, AD powerplate, rebuilt stock turbo(I think it is stock) , 3'' down pipe, Cotton Performance single shot exhaust, test pipe, dual elec fans, Walboro 255lph fuel pump w/ hot wire kit, Scanmaster II, Nitto DR's on 16" wheels, boost/vac gauge, MAF pipe.

It has stock intake filter assembly, stock IC setup, stock stall, stock radiator, stock gears in rear, and stock headers, stock suspension with new factory spec shocks and I think it has stock injectors. I need to check.

On the shelf is a tranny cooler and air bags for the rear

The car is not one that I drive and I do all of my own work? I would like to keep is streetable so I can drive to shows, drivein's, and 1/4 track, no roadcourses. Not looking to set any records, but want to squeeze out some better #'s. Of course, money is an issue.

What next, in your opinions?

 

[Evans Ward]

Alcohol injection! If you don't have a kit, you will love it. Best bang for the buck mod IMO for these cars. You will also need a 30 PSI boost gauge after that.

Where abouts in Middle GA are you? 4-5 or so of us here in Macon/ Warner Robins area.

 

[Tom Tom Turbo]

ditch that stock turbo and get some decent injectors!


with just a little TE44 and 009 injectors I've managed to sneak into the 12's without knowing what the hell I'm doing!


after that, turn your car into an alcoholic and wave goodbye to LS1s and anything else that wants to play with "grandma's car"

 

[DOUNVME]

I was thinking of Alky next. I was reading up on it in the Poston mag. I need to pull on of my injectors and see if they are stock.

PM sent to you Evan.

 

[turboman38]

If you don't replace those stock injectors you won't have to worry about any mods because you'll have a blown head gasket.

Do you have an adjustable fuel pressure regulator? With those heads you are flowing a ton of air and definitely need more fuel.

Is your intake manifold matched to your heads? If not the heads aren't helping much.

If you can get a good chip for your setup and you get your fuel system or lack there of fixed you should be in the low 12's.

You put a 44 turbo on you should be in the 11s with no problem with some proper tuning.

 

[KENAN_JAMES]

More Boost.

If your intake assembly is stock get a K&N filter 8 or 9 inch, also Alky is one of the best mods you can do at the level your at now. But your injectors will definately need an upgrade(if stock) at least 40 or 009's. Also a turbo is only good if you can turn up the boost . That's why you need injectors then Alky then crank up the boost.Stock turbo will get you to 20-22lbs could potentially runs some 12's with traction.So save the turbo upgrade until you have addressed some of these other mods.

just my 2cents

 

[DOUNVME]

Yes, I have the adj. fuel pressure reg. The intake is matched to the heads. I guess my next step is to check on the injectors. What would be the best size to get (if they are not already on it) if my next plans are alky and bigger turbo?

I will also be on the lookout for a K&N filter.

Thanks for the input and the heads up!! I have plans to get over to the track tomorrow for some test and tune. Will post #'s if the weather permits.

 

[turboman38]

If you are going to the track with stock injectors BE CAREFUL! Especially with those heads. I have the same heads on my car and have gone 11.27 @118 so they do flow more air than your injectors can handle. Don't go to crazy on the boost and you should be ok.

Your injector size depends on what else you are going to put on the car. I wanted to run high 10s so I did some research and asked some questions and decided to go with 50's. I will be running out of injector if I get to the mid 10s.

009 are good for 11.20s maybe 11 teens and above. If wants to run 10s I'd go with 60s which are fairly new. I think and someone correct me if I'm wrong but you don't have to mod the computer with 60s. If you get 55s you have to mod the ECM for the them (low impedance injectors)

 

[Googs]

I'm with the others, a high flow filter, bigger injectors, Turbo Tweek chip, and a adjustible wastegate. Then I say suspensions/ traction upgrades (urethane bushings, bags, rear swaybar, sticky tires). Tune it and you should be well in the 12's , then go for the alky and BIG BOOST :biggrin: .

 

[DOUNVME]

Went to the track today with the mods that I posted. REMEMBER!! I lost my track virginity today!!!

1st run:
.9901 Reaction time (I KNOW!!, I FEEL OLD!!)
2.1719 60 ft
5.7888 330 ft
8.2509 594 ft
8.8120 1/8 ET
80.20 1/8 MPH
2nd:
.7380 R/T (I know it needs to be below a .6)
2.04 60 ft
5.67 330 ft
8.18 594 ft
1/8 ET 8.74
1/8 MPH 80.08

I had a really bad time getting out of the hole with worn out DR's and trying to stay out of the boost like Turboman suggested. Will check on my injectors I am running now. Watching some 50# on ebay.

I did get my wife involved. She wants me to "BUY" go fast goodies so that I can go back and beat up on those guys.

 

[mikes gn]

i don't know all that much about these cars, but with his mod's, the car going off the 1/8 mile times the car is only running about 13.6 in the 1/4 at about
100 to 102 mph. i thought these cars could turn hi 13's low 14's stock??
but it could be all in the tune and the 60 foot has room for improvement..

 

[VadersV6]

You've done alot to move more air through your motor, but left a big pinch in the system by keeping the stock IC on there. You're looking at a 5-6psi drop with that POS. I would get at least a Dutt neck IC. By cutting the rolled lips off the up-pipe and switching to a Dutt neck IC, I gained about 3.5 psi. I also carved a nice radius on the inlet and outlet of the IC. I know its got a big inlet neck on it, but it still has a big sharp edge on it. Every little bit helps.
I would get a good intake tube, (1-2psi right there and faster spooling), a filter that can actually flow more air than a straw, do the IC and a little detail work like I did, and then go alky and crank the boost up. Get a tuneable chip so you can keep things in your control as you crank the boost up.

 

[ITSAV6]

???

What track did u go to? On 225/60/15 GY gatorbacks I have ran 8.30's with stk turbo,down pipe,ic and Red 93 chip and stk inj. Ran 8.50's with stk chip.
Went 8.81 STONE STOCK.

Do you have a scan tool to tune with? Your shooting in the dark without it.

 

[derek]

IMO,Ditch the stock filter setup(very restrictive).Get a quality scan tool and go from there. Turbo,inj,chip etc.....

 

[Pronto]

Most guys are running a larger fuel pump too. 255 seems low especially if you got to larger injectors and a larger turbo. Get or make a CAI and at least a Dut neck.

 

[ITSAV6]

255

255 lph is largest in tank pump. Next step is double pumper.

 

[Pronto]

I was under the impression the 307 was the former standard upgrade and now the 340 is the standard to support upgraded injectors. I thought he 255 was less volume. Please explain. Opps I just now noticed it was 255lph so that is the 340. :redface:

 

[VadersV6]

I was under the impression the 307 was the former standard upgrade and now the 340 is the standard to support upgraded injectors. I thought he 255 was less volume. Please explain. Opps I just now noticed it was 255lph so that is the 340. :redface:

I made 500rwhp with a walbro 255 pump in my cobra. I also had a kenne bell boost a pump, and it was only turned up to 10% overdrive. Those BAP's kick ass. They only overdrive the pump under boost. It adds volume, not just pressure when it cranks it up to 18 volts with it turned all the way up. I think the 255 with a BAP turned all the way up would be good for mid 10's.

 

[ITSAV6]

307 v/s 340

Both are 255 ltr per hour. The 307 internally bypasses at let's say 60# fuel psi. 340 internally bypasses at 65-70#. I am just throwing those #'s out there for example. But you get my drift.

 

[bison]

Alky injection and have your injectors cleaned or replace them. I went 11.89@113 weighing 3550lbs with the stock turbo, heads, and cam with a 3" downpipe w cutout and slicks in 80 degree air with a 1.60 60 foot. You should be able to get close to this if you dial in your setup and do the simple mods to the compressor housing and throttle body as stated above.