killer305

iTrader: (1)

hows it going. im looking to get a th350 to have when i drop my blown 383 in, and ive heard the in fact a 700r4 can hold inexcess of 650hp. so i was wondering, istead of paying 1500 for a th350 swap, including crossmenmber and driveshaft, could i rebuild one of my 700r4's, what will give me really strong, tirespinning shifts for 1500. thanks

------------------
90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player,autometer phantom gauges, soon to have 91-92 gfx, z-28 wing, new paintjob, rims, all new suspension, and new inteior

AlkyIROC

If you're expecting to pay $1500 for a TH350 swap then expect to pay close to that to beef up a 700R4 to do the same thing.

The benifit of the 700R4 is the OD but only if you feel you need it. It has a lower first gear which is nice because it will multiply torque more however it can easily overpower the tires and the gear spread between first and second gear is too great for any real performance use.

The TH350 is an easier and cheaper tranny to use. A swap is very easy only needing the B&M swap kit. If you use a long tailshaft TH350, 9" long, you can use the 700R4's driveshaft. If you use a short tailshaft, 6" long, you need a driveshaft from a 82-92 fbody that came with a 200c tranny.

If you're really expecting to produce that much HP then forget both of those trannys and install a TH400.

------------------
Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.447 altitude corrected to 10.99
Best MPH on a time slip: 119.42 altitude corrected to 124.86
Altitude corrected rear wheel HP: 493
Best 60 foot: 1.586

Racing at 3500 feet elevation with a typical race day over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

Flash84Z28

I like what Stephen said. As far as tirespinning goes. I have a Turbo-350 in my Z28 (read sig.). I get scratches when it makes the 1-2 and 2-3 shifts. If I romp on it in first (going over 20 or else they break loose) the shift holds 'til 5000 or so RPM then the tires break loose and I fishtail. I'm going to have to figure out when to let off a little when I race it next season so I don't add all that tirespin on to my timeslip.

-Matt

------------------
1984 Camaro Z28 - Black w/ Grey int.
-GMPP 350 (72cc heads, 8.5:1 CR, & .390 intake/.410 exhaust cam)with Edelbrock 600 Carb, Edelbrock Preformer RPM intake, AC Delco plugs, 8mm AC Delco wires, 14" Accel filter, Edelbrock Chrome valve covers, breather, and Air cleaner.
- Profesionally Built Turbo-350 with 2500 RPM Stall converter, Hurst shifter, & one wicked shift kit.
- Eagle Alloys 15" Alum. Rims surrounded by P235/60R15 BF Goodrich Radial T/A's
-Comming Soon:
3.73's, MAC Cat-Back, hollowed cat., B&M Megashifter, & Paint: Navy Blue Metallic w/ Silver strips
Pics & more at: http://members.fbody.com/flashz28/

five7kid

iTrader: (14)

"...tirespinning shifts"? Why would you want to do that?

The idea is to get the engine's power to the ground in a fashion that propels the car forward at the greatest rate of acceleration. Spinning the tires is counterproductive towards that goal.

------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4, 2300 stall TC. Ported World 305 heads, Crane PowerMax 2050 cam. ZZ3/4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster 80. 2.93 limited slip. Spohn SFCs waiting to be installed. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

Nitroburn

It's that "churp" sound that they're looking for. Personally, I think it's cool as heck to hear the tires churp a bit when you shift!!!

------------------
89 T-Top Firebird 305 TBI Project Car (with approval from my wife!)

killer305

iTrader: (1)

exactly, i just love the felling of pulling out of a gas staion or someplace in front of my friends, and chirping the tires on the 1-2 and 2-3 shift



------------------
90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player,autometer phantom gauges, soon to have 91-92 gfx, z-28 wing, new paintjob, rims, all new suspension, and new inteior

curt86iroc

you must also remember that the 700r4 has a lower first gear than a th350 (i believe a th350 has a 2.52 1st gear) if you really dont want overdrive, i would go for a th400 out of an old chevelle. they can hold more power that a 350 and i believe they have slightly better gearing.

------------------
1986 IROC-Z
305 LG4 w/ TH700-R4
Edelbrock TES headers & Y-pipe
3in Edelbrock cat-back
K&N air filter
Direct wired fan

AlkyIROC

If all you are looking for is the chirp then just install a shift kit.

killer305

iTrader: (1)

my trans is junk, and i need something to hold over650hp, when i drop in my blown 383, and i have read numerous times that it isnt feasable with a 700r4

------------------
90 RS 305 tbi, 4 3/4" cowl Hood, Edelbrock TES headers, Flowmaster exhaust, Crane roller cam, comp roller rockers, vortec heads/intake, ported tbi, w/new injectors, MSD probillet Distributer/ coil, 1 inch tbi spacer, air foil, 14x4 k&n flat base air cleaner, Rebuilt 700r4 w/ B&M shift kit, B&M Megashifter, 3.23 posi, 2 12 RF's with mtx amp, top of line alpine cd player,autometer phantom gauges, soon to have 91-92 gfx, z-28 wing, new paintjob, rims, all new suspension, and new inteior

ryn28

iTrader: (1)

Go with that not feasible feeling. Look for a stronger tranny, you'll need it.

86_Dan_Z28

iTrader: (1)

It will be feasable if you talk to this guy: http://www.pro-built.net/

ryn28

iTrader: (1)

No offense but I've heard all that before. The 700R4 is fine with 600HP in a streetrod or custom crusier b/c those guys never really race it. I've yet to see a 700R4 be able to handle any real race action. I've had 3 already not work out. One rebuild was relatively stock, it started slipping on the stock engine. Second one was built by a small race shop, it shifted way too late into 3 under full throttle. Last one(still using it for now) also shifts late into 3rd under full throttle. Neither of them started out like that but got that way after very little use. The last one was built by a very reputable race tranny shop too. This is my last post ragging on these trannies(at least for awhile). I'll end it saying they're garbage for real racing but great for cruising and a little fun on the side. If you want something strong for racing and want O/D, look into the 2004R. With 600HP I'd forget about O/D all together and get the TH400(if you plan on racing)

[This message has been edited by ryn28 (edited December 04, 2001).]

junkyarddog

well......my 700r4 which was rebuilt in 03/'98 is still working...or was...we'll see if it's still working after being stolen and brought for a joyride through the Washington D.C. warzones last summer. as soon as I get the TV cable in there,I wouldn't be the least bit surprized if it still does work as good as new, because these guys only took off with a 1/4 tank of gas,while I've been through tankfulls upon tankfulls of tranny abuse. by the way,it was rebuilt by FNA performance transmission in Wakfield,MA . I'm sure a 700r4 will do fine as long as it's been completly done over including extra clutches & coolers and GOOD ATF fluid. the TH400 is probably your best bet for 650HP,but it all depends on your driving habbits and your overall purposes of the car.