3rd gen stuff
 

Any body have any suggestions on how to squeeze a few more tenths out of an 86 T/A. I'm trying to get a 14.5 out of it before I do any thing major. So far with a intermitent mist fire and a 2.73 LSD rear i ended up with a 15.0 @ 90mph. not the thing is I hit my 1/8 at 71mph. I need some Ideas on how I can get more pull in the top end. Also I'm still only cutting 2.1 60' constantly no mater what rpm I launch from. I know the best way to cut that Is to drop the POS 2.73s but what else could I do. keep in mind I'm trying to get it ready by friday, and I've already started some severe WR.

#1 get rid of the misfire. Need more info, are you using the stock TPI? What 350 did you use for the swap? What cam is in it? Anyway a good way to drop the E/T IMO would be to grab yourself a 9 bolt rear end with 3.43 gears from a GTA. It is a pretty tough rear axle with good gearing and it is an easy bolt in. Next get a set of Drag radials if you don't ahve them already. That should net you close to .5. If the car is an auto a good stall will drop you alot also. For your top end power I really need to know what engine and intake you have.

welcome sir to wide wonderful world of TPI cars! Typically, there isnt as drastic a gain from 1/8-1/4 in a lot of N/A cars, generally turbo cars are the ones who really get going. Tuned ports are known for their bottom end...you need to work on hooking if you want to gain a couple tenths. Dont slam the throttle when launching and dont launch high, launch at 1100-1200. Say to yourself "hippopotamus" as you are giving it gas during the launch, at the end of the word you should be on the floor. Also, don't do some crazy burnout with street tires on it. Yes, you need heat in them, but doing a big burnout is going to make the compound a little more greasy than sticky. Tire pressure plays a big role, too.

I'm just going to assume this is a totally stock L98 car, even though its probably a truck engine with tuned port. A tune could probably help the car out but on that note EVERYTHING else has to be mechanically sound and functioning for it to be effective. Like batman said, get rid of the misfire. Thats first and foremost. I bet a new cap/rotor, plugs/wires would do that thing some good.

dont complain about the 2.73s either, I was faster with my 305 car so you still have a lot of room for improvement. If anything, more gear will make you more likely to spin without a good tire (again, batman said get some DRs but I have no room to talk as I've never raced with them). Work on fixing the car, not making it faster right now and I bet you will pick up your time. If you spend your money on go fast parts the broken **** will end up being a bottleneck so the car's potential won't be realized. good luck.

wow Dan what the hell kind of drug have you been taking?? You have had some pretty intelligent stuff to say lately.. :rock: :rock: Be careful, if you start making too much sense you will be labeled a jerk and no one will talk to you. :lol:

put exhaust on the car open exhaust don't always help you can burn a valve if you want to run open exhause at least put a pipe on the end of each header then paint them w/ spray paint , where ever the paint stops burning off cut the rest of the pipe off this should supply optimim back pressure and help the car run better, i've seen alot of stock to mild cars loose power and et by running open headers

Did you already do the basics when you bought it:

1.) Plugs, wires with proper plug gap
2.) Air Filter
3.) Fuel Filter

its got a Flowmaster catback

99% sure this is a carb'ed car

yes it is.....I posted a reply from home but for some reason it didn't post

Dan spinning isnt an issue ive watched the car launch and it doesnt have the umph with 2.73s to spin the tires. just needs more power or better

yea it just dead hooked hard as hell and i sill only got a 2.1 60' out of it. now sense we're aware of the fact that the car has a carb'ed engine, is there any way to force my 3rd gear to do better??? it pulls hard as hell through 2nd gear but 1st and 3rd are dead

oh, ****...

The fact that this is a carbed 350 that youve given us no more information about its hard to say how to make the car go faster without changing much.

Need to know what kind of cam, heads, intake base, carb size, computer controlled or completely mechanical, etc...

For all we know youre running an 8:1 smogger truck engine, so in theory you should be happy with your times.

a basic tuneup still seems like it will go really far from you. like i said cap/rotor, plugs/wires, and as was mentioned a fuel filter. You may want to check the distributor itself for correct positioning.. the car is clearly lacking power if you cut a 2.1 60' and dont spin.

What transmission is in it?

- Justin

It just needs plugs....I swapped the manifold and but the distributor in 180* off. so they fuel fouled.. and today she ran out of gas so I have at leas 1 thats fouled from that. Its completely mechanical. it has a Holley 670 street avenger like I said before and the basic Holley dual plane. now the thing is the 2.73 Is KILLING the car. once I hit 2nd gear I'm haulin *** but 3rd and it bogs out. As far as my timing, I'm gonna double check that and see how aggressive I can set the timing/carb to squeeze the most power out.

so far your telling me what I stated I already know, it need plugs...good job I said that already. I want to know any little tricks to squeeze a tad bit more out of it before I buy any more parts.

700r4

Actually, we've said it needs more than just plugs, and you didn't state that you knew that already, all you said was "i have a misfire." A good little trick to squeeze some more power out of the car is to be 100% sure everything is operating at it's best. Maybe you would be better off bringing it to someone to see whats going on. Theres only so much people can do online without knowing anything useful about the car.

I agree with Dan. You need to set a baseline to work from with all of your current parts working up to snuff. We know now that you have an ignition problem, start with that.

the car ran 15.3 with every thjing perfect...i did a few things and 15.0

With all due respect Bubba, if you have an intermittent misfire all is not perfect.

keep adding 5 pounds of air in the rear tires till it spins than take out 5 and pump the fronts up to 45 lbs - add 2 deg of advance timing each pass and when it pings go back one - the carb has a spring for the secondarys on the carb for when it opens - they sell a tuner pack with different weight springs the lighter the faster the 4 bbl will open - keep changing and watch your times till it slows -- with all of this you will get a couple -- jz

.......read that again. before the misfire it ran a 15.3 I seafoamed it and swapped in a dual plane manifold...when I did I put the distributor in 180* off, the seafoam and timing fouled some plugs. I went to atco unknowing off the issue and ran a 15.0. I just found out the hard way my battery was shot and it runs a ton better now. I guess it didn't have sufficient juice for good spark. tomorrow I'm gonna do the plugs and finish striping the interior. so we'll see what happens.

You got the car to run with the dizzy 180 out?? and how did you foul a plug running out of gas? I never had seafoam mess up any one my plugs ...

Aside from turning the car into a canoe, and knowing that the car is running 100%, your not going to go faster unless you spend some dough.

Get a accurate meter to see how your alt is putting out btw.

It didn't run...I had the manifold full of seafoam and It back fired through the carb 2 times so I took it off so the power valve did get blown to hell. so it flooded on seafoam and back fired until I figured out the issue. when It started it didn't run 100% cause it sat with fuel in there over night. when it did start It back fired an I had nice fire ball come out my new cat-back. so I set the timing and tuned the carb but its not right cause its just not pulling like it should.

it probably doesnt "pull like it should" because the heads/cam suck and/or you aren't running a whole lot of compression.

the first gear in a 700r4 can make anything seem fast which may explain why you think it pulls there...judging by your 1/8th mile trap you are on perfect pace for a 15 second car...

my 2.73 10 bolt isnt killing my t/a. my tires spin nice and easy. i have a 2.5 60ft to prove it, lol. but then again i have more power than your 350.

do you even read what I say?