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Old 08-31-2002, 02:44 PM   #1
OneArmedScissor
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Default idea: turbo lag can be your friend

has anyone here thought of using a turbo big enough that it couldnt spool in 1st gear fully so that it would help prevent stripping 1st and 2nd gear

something equiv. to a full t4 or t6 sized compressor?


my idea is this...lag in 1st gear (we can sitll pull a good 1.8-1.7 60ft) and then be able to almost reach full boost in 2nd and finally full boost in 3rd.

this would give us better top end and most likely not stress the drivetrain as much

its always 1st and 2nd gear that break

why?

because those gears multiply the torque going to the ground.

they can make 400 hp look like 800 hp REAL quick....thus snapping **** all over the place

its really the torque that kills us also

any ways to get rid of torque and raise hp?

cams maybe?
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Old 08-31-2002, 03:09 PM   #2
Ethon
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Default

hp is calculated from torque though.


Isnt it like hp=([tq*rpm]/5252) ?
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Old 08-31-2002, 03:14 PM   #3
OneArmedScissor
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yes but cars like hondas and toyota celicas (with the 2zz engine)

use their RPM to create power

this can be done on a subaru as well


i was wondering if a lghtweight flywheel could help this


i had an 8lb one in the celi

and i could demolish LT1's and BPU boost raised GTi
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Old 08-31-2002, 04:20 PM   #4
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Quote:
Originally posted by Milin
yes but cars like hondas and toyota celicas (with the 2zz engine)

use their RPM to create power

this can be done on a subaru as well


i was wondering if a lghtweight flywheel could help this


i had an 8lb one in the celi

and i could demolish LT1's and BPU boost raised GTi

uh huh
demolish LT1s?

timeslips?


and if thats how you want to avoid tranny damage, fine.

but turbolag sucks ass (for me)

=)

and yes, a lighter flywheel could help reduce the pounding put on 1st and 2nd gear when you shift/launch hard.

however, good luck getting a 1.8 60ft time witha lightweight flywheel. ESPECIALLY if you have a laggy turbo
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Old 08-31-2002, 10:01 PM   #5
OneArmedScissor
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the only way i demolished them was from a roll

keep in mind i had "full interior" (interior...whats that?)

i never EVER drove hard from 1-2 because of all the problems

one week i got overconfident

practiced driving, did some street racing

and the day before my track/dyno session

blew my transmission to all hell.

it took one week to blow the bastard to smithereens.



i did woop up on an m3 pretty hard...it was red.
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Old 09-01-2002, 12:39 AM   #6
morphgabbin
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Quote:
Originally posted by jmott


however, good luck getting a 1.8 60ft time with a lightweight flywheel. ESPECIALLY if you have a laggy turbo
Why would it be hard to get a 1.8 60ft with a lightweight flywheel? The only thing I can think of is that it wouldn't create enough load on the motor to build high boost, is this the reason?
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Old 09-01-2002, 01:41 PM   #7
EJ2002
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Default what about?

milin-
i saw u run a black on black celica one time, and u had ur ass handed to you. was the black celica turbo? i thought i heard a BOV. either way LT1=owns u!!!
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Old 09-02-2002, 12:16 AM   #8
impreza.J
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interesting proposal..need some time to think & research it.but really not sure. heres one though(if your looking for the best e.t's)..run a t66 and spray it. use a regulator that cuts the gas @7psi..no lag at all.
anyone else try this?
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Old 09-02-2002, 12:16 AM   #9
impreza.J
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interesting proposal..need some time to think & research it.but really not sure. heres one though(if your looking for the best e.t's)..run a t66 and spray it. use a regulator that cuts the gas @7psi..no lag at all.
anyone else try this?
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Old 09-02-2002, 12:24 AM   #10
negativelift
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Quote:
Originally posted by morphgabbin


Why would it be hard to get a 1.8 60ft with a lightweight flywheel? The only thing I can think of is that it wouldn't create enough load on the motor to build high boost, is this the reason?
energy storage, daniel-san.
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Old 09-02-2002, 09:54 AM   #11
jmott
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Quote:
Originally posted by morphgabbin


Why would it be hard to get a 1.8 60ft with a lightweight flywheel? The only thing I can think of is that it wouldn't create enough load on the motor to build high boost, is this the reason?
no.
mostly the reason is most of the energy used to initially launch your car is the kinetic energy stored in the flywheel spinning real fast.

our motors don't have enough power to launch the car hard without that.

also though, if youve figure out the trick that you can build a little bit of boost on launch by blipping the throttle just right, that trick would be less effective with a lightweight flywheel as well.
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Old 09-03-2002, 12:50 AM   #12
OneArmedScissor
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ive found that with my light flywheel on the old car

(8lbs)

you just had to slip the hell out of the clutch to get a good launch.

i HAD to launch much closer to 7k rpm...but NEVER dump it...just slip until it moved.

very tricky!
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Old 09-03-2002, 07:28 AM   #13
VetteVert
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Another point: A lot of the broken trannies are 3rd gear. There is less torque multiplication, but that is where the heavy load is. More than one 3rd gear drop from a roll-on, not shifting. See sponaugle's video for a graphic example.

VV
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Old 09-03-2002, 08:41 AM   #14
jlw
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Quote:
Originally posted by VetteVert
Another point: A lot of the broken trannies are 3rd gear. There is less torque multiplication, but that is where the heavy load is. More than one 3rd gear drop from a roll-on, not shifting. See sponaugle's video for a graphic example.

VV
What is a "roll-on"?
Where is the video?
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Old 09-03-2002, 09:10 AM   #15
VetteVert
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roll-on meaning he wasn't drag racing, and power-shifting into 3rd. He was already in gear, and the torque load blew 3rd gear.

Quote:
Originally posted by jlw
What is a "roll-on"?
Where is the video?
Here is the video.

VV
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Old 09-03-2002, 11:52 AM   #16
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I do that 3rd gear stuff all the time.

No more though after hearing this
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Old 09-03-2002, 12:45 PM   #17
GRoceryTurbo
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Quote:
Originally posted by VetteVert
roll-on meaning he wasn't drag racing, and power-shifting into 3rd. He was already in gear, and the torque load blew 3rd gear.
VV
is this a common problem with transmissions, I thought everyone was tearing the teeth off the main shaft. how much power was this guy making and what kind of mods did he have?

~John-who is now scared of a turbo up-grade.
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Old 09-03-2002, 12:53 PM   #18
VetteVert
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More common among those with more power. sponaugle runs a VF22 + FMIC + associated goodies last I knew. I think he was running 22psi when 3rd gave way. He did it twice (maybe more) and now has a stiRA powertrain.

VV

Search for sponaugle and read his stuff in the tranny forum. I am paraphrasing (from memory ) his mods/problems.

Quote:
Originally posted by GRoceryTurbo


is this a common problem with transmissions, I thought everyone was tearing the teeth off the main shaft. how much power was this guy making and what kind of mods did he have?

~John-who is now scared of a turbo up-grade.
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Old 09-04-2002, 12:48 AM   #19
Chris-BoT
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Here was Jeff Sponaugle's website. He's got some nice pics of his now defunct tranny.....

http://wrxworld.com/
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