View Full Version : couldnt this be dangerous....?
RisenequinoX
06-16-2009, 09:33 PM
In general, automatic transmissions are known as being more useful for lazy commuters than for hardcore racers. But it may be surprising for some to know that many pro drag-racing cars have heavy-duty auto gearboxes. That's because the brake-torque launch is an automatic specialty. This launch involves keeping the car stationary by flooring the brakes with the left foot, while using the right foot to rev up the engine against the torque converter. In technical terms, this preloads the entire drivetrain with the stress of a launch, allowing the engine to rev closer to its power and torque peaks at the starting line. Brake-torquing is also beneficial for turbocharged engines as it allows boost to build up before the launch, reducing turbo lag. The only problem is that there is a lot of stress on the transmission, and the consequent heat build-up can destroy your automatic gearbox. Unless your car has too much power for the tires to handle, a brake-torque launch usually will not spin the wheels. This is because the automatic transmission absorbs the shock by design, and brake-torquing actually reduces stress on the rest of the drivetrain. Instead of a sudden massive load, the drivetrain has the torque applied slower instead of one huge jolt. idk about this one ?
[ion] C2
06-16-2009, 09:55 PM
?
Autos are FTW in racing... manuals are for "fun" or whatever else a manual-fan will say they love them for. It's preferential. Autos are better for drag racing when built right.
RisenequinoX
06-16-2009, 10:01 PM
alright i was just wondering cus i tried it today in my driveway just to see exactly how much resistance it created or whatever and i just wanted to make sure i wasnt going to mess anything up
[ion] C2
06-16-2009, 10:06 PM
Haha that is a bad idea.
Also, at least on the 4T40E, the stock stall speed is 2200-2800 depending on year it seems; that is the ideal brake torque RPM, any higher you risk damaging components.
RisenequinoX
06-16-2009, 10:08 PM
well i have an 03 4 dr 3400 what trans does that have or are they all the same?
[ion] C2
06-16-2009, 10:10 PM
That has the 4T45E, notoriously less reliable than the one on the 4 cylinders.
I believe that one is around 1400-1800... don't quote on that. Not sure exactly how you find out. It might be in one of the technical specification things that Cliff8928 seems to have access to
RisenequinoX
06-16-2009, 10:13 PM
alright so saying that, not quoting you, the 4t40e can withstand higher rpm's?
[ion] C2
06-16-2009, 10:20 PM
Don't know, they're supposed to be an almost identical transmission but GM somehow screwed it up royally.
RisenequinoX
06-16-2009, 10:24 PM
lol i guess you can count on gm XD.
what would tuning the transmission in my car do?
[ion] C2
06-16-2009, 10:26 PM
Make it shift faster and harder.
RisenequinoX
06-16-2009, 10:28 PM
dont mind my many many questions it's a learning process. =]
where can i get this done?
[ion] C2
06-16-2009, 10:37 PM
You do it yourself with HPTuners (http://hptuners.com), or you can talk to one of the companies that make customized PCMs for the 3400, they'll do to it whatever you want. However, there's nothing they can do that will be perfectly tweaked to your setup. Have to do it on the spot, in-car, none of this mail-order tune crap.
RisenequinoX
06-16-2009, 10:45 PM
alright sweet.
i was just admiring your car, where'd you get all the carbon fiber and guage clusters at?
[ion] C2
06-16-2009, 10:49 PM
The interior trim I bought off a member on here, however there is a seller on eBay, just search for "Carbon Fiber Dash Kit Alero", and ensure it's "GENUINE carbon fiber" and not a simulated pattern version. I believe Sherwood Dash also makes them.
The gauge cluster carbon fiber one was bought on eBay as an "Intrigue Carbon Fiber Bezel," as the Intrgue and Alero have the same gauge bezel.
The reverse glow white face gauges were also bought on eBay from a seller d1tuning if I recall correctly.
RisenequinoX
06-16-2009, 10:54 PM
alright now along the lines of an exhaust i see a lot of people use this.... http://summitracing.com/parts/PSM-88-1474/?image=large
would you consider that?
[ion] C2
06-16-2009, 10:56 PM
On the 3400 it sounds great, made by a good company, and a decent price.
On either of the 4 cylinders, it sounds horrendous haha.
RisenequinoX
06-16-2009, 10:57 PM
hahah thats what i was wondering. i just think most dual exhausts on a 4 cyl. would sound not that great. my friend has a cavi and it has dual pipes and its pretty bad hahah
[ion] C2
06-16-2009, 10:58 PM
I have two mufflers in a row (high flowing ones) and dual outlets. Mine's super quiet. Well, besides when I go wide open, because the wastegate dump tube is just routed to the underside of the car, and doesn't hook up to the rest of the exhaust, so it gets REALLY LOUD.
RisenequinoX
06-16-2009, 11:01 PM
i bet i'm keeping you busy right now, haha.
alright now say, just for starters, there might be a thread, not sure,
but would i need forged pistons, a performance upper manifold and
other goodies like that from wot-tech.com if i was considering a
turbo?
[ion] C2
06-16-2009, 11:14 PM
Yes sir. The connecting rods are forged stock, although not sure on the quality of them or what HP they're good to, probably at least 350 just to throw a number out there.
You definitely need a way to tune it too. For just the most basic list:
AEM UEGO wideband gauge/sensor
HPTuners
turbocharger
wastegate
custom exhaust/turbo manifold
downpipe flange
downpipe
braided oil lines with fittings
charge piping
couplings and t-bolt clamps for pipes
blow-off valve
fuel injectors
boost controller (optional)
intercooler
RisenequinoX
06-16-2009, 11:17 PM
hmmm seems very expensive, lol so I am probably going to be buying stuff one at a time and accumulate it over the next year but im keepin you in mind haha =]
AleroDrime
06-16-2009, 11:19 PM
i gotta ask, are manuals faster in a straight line, ive always been told they were because you could control the shift point?
RisenequinoX
06-16-2009, 11:52 PM
AEM UEGO wideband gauge/sensor = $190-$290
HPTuners = around $500
Turbocharger = Wide price range... lol
Wastegate = $230-$995 depending on size and model
custom exhaust/turbo manifold = would the pacesetter i showed you earlier qualify? and for turbo manifold, what about the performance series from wot-tech?
downpipe flange = about $20
downpipe = custom made?
braided oil lines with fittings = $15 per foot
charge piping = custom made?
couplings and t-bolt clamps for pipes = ?
blow-off valve = $275
fuel injectors = what size?
intercooler = $1,000 - $2,500
thats a pretty steep list, i'm going to do some searching and see if there are really any fullkits on the market but i doubt it.
EDIT: it took a while to do that research lol
[ion] C2
06-17-2009, 12:46 AM
AEM UEGO wideband gauge/sensor = $190-$290
HPTuners = around $500
Turbocharger = Wide price range... lol
Wastegate = $230-$995 depending on size and model
custom exhaust/turbo manifold = would the pacesetter i showed you earlier qualify? and for turbo manifold, what about the performance series from wot-tech?
downpipe flange = about $20
downpipe = custom made?
braided oil lines with fittings = $15 per foot
charge piping = custom made?
couplings and t-bolt clamps for pipes = ?
blow-off valve = $275
fuel injectors = what size?
intercooler = $1,000 - $2,500
thats a pretty steep list, i'm going to do some searching and see if there are really any fullkits on the market but i doubt it.
EDIT: it took a while to do that research lol
Your pricing is way off. There are no "kits" made for this car either. You'll need to do some serious research in what all the parts are and what you need to understand what you want to do.
AEM UEGO wideband gauge/sensor = $220
HPTuners = $500
Turbocharger = $400-500 for a decent sized one for the V6 (mine was $180)
Wastegate = $225 for TiAL 38mm (what I have, but if you have an internal wastegate on the turbo you don't need this, it's just nice to have a more reliable, larger wastegate)
custom exhaust/turbo manifold = all custom up to the cat. pricing wide range.
downpipe = custom made, pricing varies
braided oil lines with fittings = depends on what you buy. SS line is expensive, AN fittings are like $10/piece. i bought an eBay kit for like $40 but you get what you pay for and I ended up buying quite a few stronger AN fittings
charge piping = get a kit off ebay for $90, comes with a lot of bends, you just cut and weld as needed.
couplings and t-bolt clamps for pipes = www.siliconeintakes.com (http://www.siliconeintakes.com) you won't know pricing til you know your charge piping necessities
blow-off valve = $45 for a GReddy RS clone (uses GReddy internals, housing is knockoff, no big deal)
fuel injectors = size depends on what you want, but they're usually cheap if you get them made from another car that has bigger ones stock (like for us LD9 guys we can use the Cobalt SS/SC ones and get them for like $30-100 total)
intercooler = $1,000 - $2,500 <-- LOL not sure where the hell you got this, but the CXRacing eBay ones are decent and are around $100. most name brand ones are around $400 but there's really no need to get a high end intercooler unless you realllllly need to extract those extra couple degrees of cooling... because there isn't much difference between the name brand and CXRacing
i gotta ask, are manuals faster in a straight line, ive always been told they were because you could control the shift point?
Dude. It's preferential. You tune the automatic to shift at the exact moment it should. If the car isn't making any more power at a higher shift point there's no reason to shift then. Autos can shift faster than any manual can, but they suck out some more power on the way to the wheels than a manual does.
Seriously, GOOGLE. Auto vs. Manual. Not that hard. It's an age old debate. Get whatever you want.
RisenequinoX
06-17-2009, 12:49 AM
lol so this is actually not as bad as i was bashing
my head off of my desk doing this.
haha so all i need is to buy all this somehow learn how
to weld and all that good stuff or find someone that
can help me and i could possibly have a beast? lol
[ion] C2
06-17-2009, 12:51 AM
Yup make friends with a welder or learn, the parts are cheap, it's labor that kills you.
RisenequinoX
06-17-2009, 12:53 AM
i have a few contacts in my list.
this is just so fun hahaha
lol so this is actually not as bad as i was bashing
my head off of my desk doing this.
haha so all i need is to buy all this somehow learn how
to weld and all that good stuff or find someone that
can help me and i could possibly have a beast? lol
you could have a beast with a different car for a lot cheaper and get more power return to your dollar :p
RisenequinoX
06-17-2009, 08:08 PM
or have a sleeper thats sexy =]
bdyman
06-17-2009, 08:11 PM
and then when your done with the go fast goodies, bring the car to me and i can make it look good
:)
RisenequinoX
06-17-2009, 08:14 PM
all the way in chicago? doin it for free? hahah XD
deathwish666
06-17-2009, 08:17 PM
i gotta ask, are manuals faster in a straight line, ive always been told they were because you could control the shift point?
for the vast majority...no...
but hypothetically(?) if you were to have perfect timing and perfect shifts...i would think so
bdyman
06-17-2009, 08:18 PM
all the way in chicago? doin it for free? hahah XD
for free??? let me give that some thought....................................oh ok not so much with the free part
Caboose73
06-17-2009, 08:20 PM
you cant out shift a computer
RisenequinoX
06-17-2009, 08:51 PM
for free??? let me give that some thought....................................oh ok not so much with the free part
lol i was thinking you would say that...
but in what ways would you make it look good?
vBulletin v3.6.0, Copyright ©2000-2025, Jelsoft Enterprises Ltd.