hey guys,
this is what i have come up with as my idea of what it takes to run the good numbers with a 305. let me know what you think.

Formula for low 14's/ high 13's with TBI

1. posi with 3.73 or 4.11 gears, i think 3.73 is a better all around gear, 4.11's will be a little quicker
2. edelbrock performer tbi or holley tbi street dominator intake.
3. ultimate tbi mods
4. aldl convertor lock up switch
5. 14x3 flat base open element
6. lower control arm relocation bracklets
7. boxed stock lower control arms
8. billet servo and stronger accumulator spring for tranny.
9. a tourque convertor from a 4cyl s-10
10. a full exhaust A. 1 5/8 primary headers with 3inch collectors B. a 3inch y-pipe C. a high flow 3inch cat D. a 3inch cat back 11. unhook one of your endlinks from the front sway bar when you are at the track.
12. remove your jack and spare
13. find a used LT1 cam 285hp cam prefered 14. buy good tires, drag tirees aren't necessary but would help. cooper cobras will work nicely.
15. run with a half tank of gas or less
16. get all the junk out of your car, a good cleaning will lighten a car more than you think.
17. stage as shallow as possible
18. a new chip will get you the most out of the new engine combo and there are a few guys around that will help you on the cheap, isn't that right jprevost 19. pull the rear seats out, it looks racey and gets about 35lbs out of the car in only 15mins.
20. A better set of heads than the stock swirl ports will help a lot. World Products Torquer 305's give a lot better flow and maintain all your compression. something like an edelbrock performer centerbolt will get you even more flow from largter 2.02/1.60 valves but you will lose a drop of compression and they cost about $400 more than the world products heads.


later
tim

------------------
91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

good job. Were u bored today.

------------------
Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

 

Question on #7. Poly bushings?

 

poly bushings are a good thing and would help a little. if your stock rubber bushings are in good shape, ie: not cracked or dry rotted, then you can just keep them and save the $45 to apply to another mod.
i figured this out based on how cheap can you get a 305 into or close to the 13's, that is why some stuff like that got left out.
this whole thing is being tested at present. the build up of blackbird305's car is based of this basic formula.
maybe he can post and tell what he has done off the list so far. he has gotten a nice mph gain so far but traction has prevented any real progress in the ET.

later
tim

------------------
91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

lol, i posted it because someone asked about running 14's on the drag racing board. i actually wrote it last week when everybody was busy being dicks to each other and making it sound like working on these engines was almost magic because it was so complicated.
i think this contains a lot of stuff we all agree on, some stuff may be a little different, but for ht emost part i think we can all agree on it.
there are more steps that make it into a daily drivable, N/A, low 13sec car, but i decided to leave them off since it just starts to get rough on the budget at that point. most of that is about weight and traction, my two favorite subjects

later
tim


------------------
91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

No, this is good. I don't understand where you get the time, NJSpeeder, but now we can just tell the newbies to do a search for "Formula for low 14's or high 13's."

------------------
No guts, no glory.

 

how much would that TC go for? what is involved in puttin it in? do you need to unbolt the tranny from the engine?

------------------
-Tas
'89 Formula WS.6

Got Beach?

 

Tas, yes you will have to pull the trans away from the eng to get the convertor out of the front of the trans. Sorry, looks like real work! LOL Tim, I remember that post and I'm glad that you did not let your list get buried for others sakes! That thread got kind of out of control not to mention off tech.

 

the convertors can usually be found in a salvage yard on a late model wreck for under $100. or new from gm for $200 i think, ask at your local parts store(tell them you need a replacement torque convertor for a 1999 vcyl s-10 pick up)
the install is pretty easy really. just put hte tranny in neutral and.....
1. jack teh car up all the way aroudn as high as you can and get jack stands under it.
2. unbolt the drive shaft from the rear and slide it out of the tranny, unplug the convertor lock up connector and speed sensor connectors
3. remove the cooler out and return lines(passenger side of tranny, and put a rag or catch pan under it there will be fluid coming out), remove the shifter cable(be careful not to let the adjuster move or you will have to reset it
4. support the tranny with a floor jack
5. unbolt tranny cross member from the frame of the car
6. unbolt fly wheel cover and remove
7. unbolt the convertor from the flexplate
8. unbolt the bell housing(make sure the tranny is stable on the jack, a tranny cup or a piece of plywood can be used, and have a friend to help hold it still)
9. lower teh tranny slowly
10. slide the old convertor off the tranny
11. fillthe new converotr half way up(about 1.5qrts) with fresh fluid
12. now just put it back together the same way you tool it apart

you will need to run the car until it is all the way warm and top off the tranny fluid before you go out on the road. take it easy for a few days on a new convertor until it can seat a little, give it about 50miles at least. then romp on it

later
tim


------------------
91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

If you had a 5-speed, what would you recommend doing instead of numbers 3,8,9?
50 shot?
Stronger clutch?
Short Throw Shifter?
Torque Arm?

or just the same?

------------------
-Don't buy any wooden nickels

 

Definatly a torque arm and relocation brackets for your LCA. This is the only true way to plant the rear. Poly bushings on stock LCAs actually work really well. Box the LCAs and panhard bar yourself and install the new bushings. Save $$$ and they'll work just as well but weight maybe 5-10lbs more than an expensive setup. You do the math, $$ or $$$ .
It is very true that weight is a killer. If you get rid of 100 lbs you've just made lots of progess towards a better ET.

------------------
, Jon (350 TBI!)
91 Red My website

 

i wouldn't go past 2600lbs for hte clutch. once you go past that it starts to become a PIA on the street. a short throw shifter is a big yes. a good torque arm would be a big help too, just stay away from ones like the jegster that move the force point to the floor pan. you will end up with a very wrecked floor pan. i suggest the spohn unit, that is what i use. the rod end ones are fine for the streeet once you get used to the little thump(just a noise, nothing you actually feel) when you first hit the gas.
i would keep step 3 though, the ultimate tbi mods are a solid gain.




------------------
91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

since the TC is a stocker it wouldn't be slipping at 2000RPMs on the freeway ya? What's the deal with its lockup?

------------------
-Tas
'89 Formula WS.6

Got Beach?

 

there is always slip in a converter. they can't catch 100% without a hydraulic force being appied. the best, and i mean big $$$$$ best, convertors in the world still have 3% slip at 10K rpm. this may surprise you but our stockers don't have that level of perfection to them
the lock up just applies a little pressure to reduce the slip to about 1% from the standard about 10%.

later
tim

------------------
91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

I would honestly like to see low 14's outa this combo...

edelbrock tes headders (1 5/8, 3" y), catco 3" cat, flowmaster force 2 3" catback, 3.42 posi rear (10 bolt), drag radials, stock lt1 cam, vortec L31 heads (machined to up compression), edelbrock 4bbl vortec intake + holley adaptor plate, ulimate tbi'ed tb, 1.5 roller rockers, sphon lca relocation brackets. A higher stall would be nice, like you said, but I dont konw if its necessary. With the dr's though, they'd love to have that extra rpm at launch...

Realistically I think it'd be good for about 14.5 though. The heads just dont have it in 'em because I'd be losing lift and could only run 1.5 rockers. But they're exactly what I need right now, a solid, cheap head.

btw, Tim, did you get my email or my aim message about the cam?

------------------
Chuck Kulchar
1991 RS
Open Element w/K&N
3" cat and Force II cat-back

[This message has been edited by Chuck! (edited October 17, 2001).]

 

HP= Better than stock Heads, cam, free flow exhaust, free flow intake, and enough fuel to support the power.
Traction= New gears, posi unit (SLP take-off only $99), boxed suspension parts, unbolt one front sway bar endlink, inflate front tires, run slicks but be warned! Slicks will break other parts especially if you have a shift kit or are powershifting.
It's pretty easy to get TBI into the 14's. You don't need to take off the heads or swap cam. To get into the low 14's you will need to do some more serious bolt-ons like heads and a cam swap. Keep in mind we have a speed density system so you'll need to increase fuel pressure after your mods! This is where the power is. You can give the engine ALL the air in the world but you will NOT make power unless you have enough fuel to create a good 13:1 air fuel ratio.

------------------
, Jon (350 TBI!)
91 Red My website

 

i did get it but i am having a prob with my old aol mail. i wqill try to get back to you cabout it.

later
tim




------------------
91 Camaro RS-LO3,Auto
New Times Coming Soon!
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder
My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299
DSI Racing Home Page
www.geocities.com/foff667

 

where can i find mods for my tbi on a 91rs 305 stock everything but am restoring her slowly

 

um welcome to the site. Read some posts on what people have done. That will help figure out what you can do yourself. Peoples websites are helpful too.

------------------
-Tas
'89 Formula WS.6

Got Beach?