reinforced sr20 or vg30 transmission help...

[Imarvin240]

hey, im looking to change from just a z32 trans, to somehting a bit stronger. i have been trying to search for stronger/reinforced transmissions but im having a bit of trouble finding some. im not exactly worried about price, since it will save me from replacing transmissions in the long run. i cant really find anything for the vg30 category but i have found nismo sr20 reinforced transmissions and os gikon gear sets...i didnt know if anyone could point me in a different/better direction for a transmission.

i have heard about g-force transmissions but i dont know if they make anything to mount to the back of an sr...any help would be helpful. again, im not worried about price...worst case i end up getting the nismo transmission or just stocking up on z32 transmissions haha but i would like to try and avoid that. thank you and i look forward to hearing your opinions.

[codyace]

If you're busting Z32 transmissions, you're going to need to look into Domestic based boxes. Nothing import related is worth the time

[Imarvin240]

If you're busting Z32 transmissions, you're going to need to look into Domestic based boxes. Nothing import related is worth the time

what are people running on thier high hp sr20 motors? i cant find any info on people running domestic drivetrains on an sr20. all i see people running are z32, rb25, and reinforced sr20 or z32 transmissions.

[sean350z]

Doesn't mean you couldn't be the first to try...

TREMEC 6-Speed T-56 Magnum Transmission System (http://www.americanpowertrain.com/T56-Magnum.html)

Big power = big $$$$ :snoop:

[Imarvin240]

well what are the drag racers/high hp sr guys running?
my setup puts down ~800whp...i need an alternative to the z32 or nismo sr transmission

[inopsey]

you can get a rb25 adapter kit. i think theres a z33 adapter kit available from a vendor in the vendor drivetrain classifieds.

[thefro526]

what are people running on thier high hp sr20 motors? i cant find any info on people running domestic drivetrains on an sr20. all i see people running are z32, rb25, and reinforced sr20 or z32 transmissions.

Most high horsepower SR's I've seen run Z32/RB25 (Same internals IIRC) or Later Model Z33 Transmissions.

If you've got the money to spend, you're better off looking at a Domestic Option like CodyAce said.

[codyace]

Adapting a TKO based box works, obviously an adapter for a T56 would work as well, however at that rate it's cheaper/more reliable to stick with a TKO/Tremec/Domestic style transmisison

Realistically though if you wanna go fast I'd be looking at a Domestic 3 speed Auto.

[Imarvin240]

hah im trying to stay away from the 3-speed auto transmissions, its for my time attack car. i need a 5 to 6 speed transmission

[codyace]

hah im trying to stay away from the 3-speed auto transmissions, its for my time attack car. i need a 5 to 6 speed transmission

Ah make ssense. I kinda assumed with that HP you were looking to go fast in a straight line ;)


I'd def look into a TKO setup myself,however I'm not sure how much torque you are making...a TKO600 should be capable, but you'd be pushing it. I know MMR or someone makes a 'tko'900 (900 whp capable transmision) so I'm not sure how much stronger it really is.

[whitepony22]

I'm sure if you contact the guys at Mazworx they can build you something between a Z32/Z33 trans that will more than handle your power.

[Imarvin240]

I'm sure if you contact the guys at Mazworx they can build you something between a Z32/Z33 trans that will more than handle your power.

just the gears from them would cost about $7,500...i may end up just buying the gears and building the trans myself, would cost to much to have them do it. i have all the tools needed to do a transmission rebuild, so i guess thats an option.

i will have to take a look at the other transmissions that were mentioned above, first.

[shiftdrift]

Getrag 6 speed. V160(161).

[codyace]

i will have to take a look at the other transmissions that were mentioned above, first.

It's certainly something to look into, but obviously you'll need to dive into Input shafts/spin counts/clutch interchangability and all of that stuff. I can't think of the member on here who is running a GForce setup, it was for sale too at last reading.

[Imarvin240]

yeah, i have been researching G-force since the beginning of my search hah i think what im going to do, is try to get the g-force street 6-speed transmission (rated for ~1000whp) and see if i can get a bellhousing/adapter plate made for it. but that is after i talk to g-force and get some measurements on the transmission to see if i have to enlarge the transmission tunnel under the car (the transmission was made to fit cars with V8 engines so i suspect that the diameter is a bit larger but we will see) ...i will try and update this if things change, but it may take a few weeks to have all of that figured out...untill then!

[Imarvin240]

okay, quick update/question

i found a company in sweden with the help of my friend, here is a link to it below. they make a transmission for RBs, so im looking into adapter plates for those. I also sent them a message on pricing and a few other more technical questions.
Rear Wheel Drive Sequential Transmissions (http://www.tractive.se/products/rwd-seq-shift-gearboxes__11)


on the G-force topic, here is my question...does any company make an adapter for a t-56 transmission? i ask, because that would make things so much simpler if i end up getting the transmission from G-force.

[inopsey]

these guys sell rb25/sr20 adapter plates

Powertune Online Store: SR20: Drivetrain (http://www.powertune.com.au/sr20drivetrain.html)

[Imarvin240]

okay, slight update. the swedish company is a no go since it would cost roughly $18k for the transmission. hah im willing to send alot, but thats slightly out of the price range. im going to contact g-force again this week and see what we can do about getting there transmission to work for my SR. I will update more when i get some more information for you guys.

[tinto]

Holinger.
Holinger - Products (http://www.holinger.com.au/product-list-current-trans.php)

Although I think their pricing may be close to what you've seen.

[TheRealSy90]

Honestly I'm interested in what car you own?

800hp and Time Attack? I wanna see pics of this thing!

[Imarvin240]

Honestly I'm interested in what car you own?

800hp and Time Attack? I wanna see pics of this thing!

the build thread/majority of the pictures wont be shown till the car is besically done. the car is being built to compete in the Modified class. the car will make between 700-800hp when its all said and done. as long as she doesnt lag to much, there shouldnt be a problem. you also have to take into account that a Z ways a bit more then a 240. to me, as long as i can keep the power to the ground without losing traction, handleing isn't compromised, acceleration is great, and the car stays nimble...then i think it should run just fine. if it is to laggy, i can always just drop down to a smaller turbo :)

here is a sneak peak of the engine when it got dropped off from Mazworx. its an extremely horrible sneak peak...but im sorry.

http://a4.sphotos.ak.fbcdn.net/hphotos-ak-snc6/250496_10150268572741754_526896753_8968628_3750654 _n.jpg

[codyace]

Wonder if Bill at dentsport still has his: SR20 G-force Dogbox Complete Setup - Nissan Road Racing Forums (http://www.nissanroadracing.com/showthread.php?t=2566&highlight=gforce)

[Imarvin240]

Wonder if Bill at dentsport still has his: SR20 G-force Dogbox Complete Setup - Nissan Road Racing Forums (http://www.nissanroadracing.com/showthread.php?t=2566&highlight=gforce)

haha i am emailing him now. if he doesnt still have it, he can hopefully give me some helpful info. thanks for that Codyace.

[fliprayzin240sx]

800hp sr20, time attack and not laggy does not belong in the same sentence...

[Def]

700+ HP from an SR20 on a track car calls for AT LEAST a 9.5k RPM redline just to have some sembalance of a powerband. The car will be out of boost on all but the most flowing of tracks that fit the gear ratios perfectly. It'll be fast as hell on straights assuming you don't drop out of boost, but that seems like a hard car to drive.

I'd want at least a 6 speed sequential box to try to keep that thing on boil.

And I'd probably want to try to sleeve it out to 89 or 90 mm just to widen the powerband but still rev the crap out of it.

[Imarvin240]

700+ HP from an SR20 on a track car calls for AT LEAST a 9.5k RPM redline just to have some sembalance of a powerband. The car will be out of boost on all but the most flowing of tracks that fit the gear ratios perfectly. It'll be fast as hell on straights assuming you don't drop out of boost, but that seems like a hard car to drive.

I'd want at least a 6 speed sequential box to try to keep that thing on boil.

And I'd probably want to try to sleeve it out to 89 or 90 mm just to widen the powerband but still rev the crap out of it.

it is a 90mm bore and it is running the new borg warner EFR series turbo, full race twin scroll dual wastegate VE manifold, meth injection, enlarged ports, oversized valves, ect...it will be fine with boost...on the flow bench, it was quite impressive. Full-race actually picked out the turbo setup that will work the best for the motor (gave them all the specs, flow bench numbers, what it will be used for, ect.) and mazworx helped design the engine for the same purpose. and yes, i agree with the 6-speed statement, that is what i am looking into. the redline will probably be more around the 10k mark.

i do appreciate the constructed remarks, but guys im not just building this by myself and guessing with everything...i am in contact with alot of companies and get very good info about this build. i also do a TON of research everyday for this. nothing on this car is being over looked and i contact companies everyday asking questions to make sure what i buy and what i do to the car, is not going to comprimise its purpose, which is to be in modified time attack. i know that amount of power may seem like alot for a time attack car, but there are alot of other cars making this horse power (World racing scion makes around 800, double down 350z makes around 800hp, cyber evo makes over 700hp, ect.) again, it may seem like alot, but cars are running with more and more power these days.

ALSO, the cyber evo and world racing scion are both 4 cylinders and they dont seem to have a problem with lag :) and there are plenty of other 4 cylinder cars running in time attack with 650+ hp

[tinto]

Sounds like it is going to be a beast!
At this rate you may be one of the first to release real world info on the EFR :)

Stroked engine?
...did I read VE head?
Your wrapped-in-plastic tease wasn't nearly enough ;)