Ok I have my 92 camaro now with a mild build. 350 700r4 post 10 bolt. Around 350 HP. I am planning a build for over the winter and my target is 800 HP give or take. I am wondering is it even worth trying to build a 700r4 for that power? Honestly never know anyone personally to have any luck with even a well built 700r4 with any kinda power behind it. I was thinking a th350 maybe if its worth it going through the trouble of a th400. This cars is street strip but by no means a daily driver. Just weekends at the track and maybe a little road fun throughout the week. Any advice especially from those who have high HP cars.

 

With 800 ish hp a 700r4 would not last very long. Even a welll built one probably wont last long either. Probuilt (one of the best rebuild kits) does offer a rebuild kit that can handle 750 plus hp. A th350 rebuilt correctly would take 800 hp. now for the 10 bolt rear end. That won't last. Might as well upgrade that also to a 12 bolt or 9 inch

 

It will cost you over 4 grand to build a 700r4 to handle that power reliably. there are a few vette guys getting 4L60E setups to live behind 800+whp running almost high 8 second 1/4 miles, but they are expensive trannies.

Th400 with a simple rebuild can do that no problem for under 1200 bucks. It just sucks you lose overdrive. Mine has been living just fine with simple parts inside. If you get nasty with the rebuild packages, they can live up over 1500+hp no problem

 

That's what I been thinking. Now a th400 needs a new trans mount and crossmember to fit in the 3rd gens right? Any other mods. Tue th350 don't need any mods right? Also factory driveshaft still fit? I will probably get a new one but nice to know I still keep stock size. I am working on a 9 inch or 12 bolt also. Just have to buy one made for the car or get one cut down.

 

Orr89rocz you have pretty much what I am going for a large displacement sbc and twin turbos. E85 cause turbo love it and higher octane. Maybe a water injection too.

 

New crossmember and driveshaft, both of which I got from Spohn. Stock DS wont work. Thats all you really need. 800hp you should upgrade the DS to a good steel unit. They have different options for rear end yokes, so if you use stock rear/12 bolt/9" or whatever they have you covered. Can even rig the stock shifter to work. I used stocker for a year and then went B&M Megashifter which is "ok". Fun for gear changes but PITA to work with from park to drive and reverse.

I think the Th350 is the same way but cant be certain.

Big displacement with decent heads and cam will easily make 800hp on moderate boost. Mine was about 800 hp i'd say. My new setup will run closer to 1200 all said and done I think.... but we shall see when I get it together.

 

Setting a goal for the engine is fine but everything behind it will need to be replaced as well.

If you "have" to have an overdrive then a 4L80E or 200-4R are good options. GN cars are running 8's with a 200-4R. No matter which transmission you choose, you'll need to buy a new crossmember with a torque arm attached to the crossmember as there's no easy way to mount the torque arm onto the back of any transmission that didn't come from a third gen, not that you would want to.

If you don't need an OD, a TH400 is the best option although a Powerglide will also have no problems. With that much power, there's no reason to have a lot of gears to get you moving.

Upgrade the driveshaft to a .083" x 3" steel with 1350 u-joints. Get a 1350 yoke for the tranny and diff. Upgrade the diff to a 12 bolt or 9" and you can then enjoy your 800 hp.

My car is making an estimated 930 dyno hp to the wheels but it's also not street legal.

 

The correct answer is 4L80E If you want an overdrive and you do with $4.00 a gallon gas. But now your past the motor and trans and at the rear end. The correct answer there would be a ford 9 or 12 bolt. I prefer the ford 9 since parts are easier to get and swapping gears is very quick.

 

What's the idea for hitting 800 horsepower anyway? N/A? Nitrous? Turbo? Supercharger?

 

i found this helpful

 

If your building a 800hp car i'm sure the last thing you worry about is gas mileage

 

Gas mileage means nothing the car is for fun and e85 is a little cheaper. Of course I planned on doing the rear end. I was leaning toward the 9inch but whatever is a better deal at the time. I have seen "kits" for the th400. Th400 may be the way. I thank yall for the input.

 

2 good things about turbo cars and Th400's..... with turbo car's high power and torque, you dont need alot of rear end gear. I run 2.73's and will never go higher than 3.23's on my setup with 26" tires. It drives great on the road since its highway geared, but still gets up and goes when you put the power down.

Second is the torque converter. Turbo converter designed for 800 hp+ may stall at 3500-4000 rpm or whatever else you want it to, when its on full power. However, off boost and just driving around, the motor doesnt make much power and thus cant get the converter to slip as much. This means lower rpms while cruising around! Converter acts much tighter. On motor alone my converter flashes to 3000. On boost its more like 4200. It used to be 5400 before I had it reconfigured.

So you have 2 converters in 1. Low stall street setup which is a good thing with a non-lock up style tranny like the Th400. High stall for when the boost comes on. Cant beat it. People ask me how i drive with 4200 stall and 2.73 gears.... well big 400 cubes makes enough torque that 2.73's arent a problem and the converter only acts like a 2800-3000 stall when driving around so its very streetable.

 

Has anyone heard of a new S60 rear end coming out. I think it is a dana 60 casted for use in our cars as well as others. Where does the dana 60 rank among the 12 bolts and ford 9 rears?

 

dana 60 should be stronger than the other 2. Its got a beefier ring gear than a 9"

 

The S60 has been available for our cars for a few years now. It's a step beyond the 12-bolt, but with only 800 HP, the 12-bolt should be enough.

 

The 12 bolt will be good for way more than 800 HP.

 

A Dana 60 would be nice but it's also a big heavy differential. I use a 9" in my car even though very little of it is a production component. Housing, axle tubes and bearing ends are OEM. Everything else is aftermarket. Aluminum bolt through case, aluminum spool, aluminum Daytona pinion support. I can lift the center section into the housing with one hand so it's much lighter than a stock center.

 

Im with Orr Just get a Th400.

Im getting ready to put a FTI built Th400 and PTC 3500 converter in my car. Id rather a built T56 and twin disk clutch setup but not for what that would cost. ( already have the th400/converter and 1350 nice steel d/s) and my T56 crossmember with TRQ arm mounted to it will worth with the Th400 setup also.

 

Cant find a buyer for that Th400?

 

If you are serious about building the 700R4 to handle 800FWHP, give me a call and we can discuss the possibility of this working or not, and which torque converter you will need. 909 795-1876 evenings. Dana

 

At 800 HP which would be the first parts to break in a 700R4? I have heard of the 5 pinion planets, the beast sun shell and added clutches but I am not a trans guy. I have heard that you want a 700R4 with the casting ring that circles around by the trans line fittings on the case. I also heard that 700s with the golden rooster (the shifting piece in the trans) came out of V8 3rd gens and vetts.

 

Heres the level 7 tranny from RPM Transmissions that I know has been working in several fast vettes running 9.0's at over 155 mph. 3400+ lbs of weight too

http://rpmtransmissions.com/levelvii.html

 

Great site, $4500 for any trans is steep. I bought a 4l80e to go in my iroc and another member shared that you can get a modern ls style computer system for our cars that would shift the 4l80e instead of a controler. I would like to add paddle shifting if it is possible in our cars.

 

I thought it was pricey too, as I got excited when I found out cars were running basicaly 700r4's at the speeds I want to go. I still have my 700r4 and figured I'd save to have that built, then I saw the price and was like FORGET THAT. I dont drive that much to need overdrive anyway. I"ll stick with the 2.73 gears and TH400 for now

 

+2 on the paddle shifter
Check out mastershift.com

 

extremely neat, but for 2000 bucks? no thanks

 

nope, So I'll just use it. if anything I'll find a used gear venders overdrive down the road.

 

I have hit a few local trans shops and learned about the 5 pinion planets and beast sunshell and also the clutch kits for 3-4 pack that add an extra clutch that adds a lot to the 700 4l60e trans. A 4l70e is the way to go on the E side of a 700. I think it has a 13 vane pump which is supposed to help above 6500 RPM and all the other goodies I mentioned above. They all have weak spots though and the trans guys all tell me to get a 400 or a 4l80E if you want real reliability with longevity. I was at Street and Performance about six months ago and they have the new 6l80e transmissions stacked up ready to sell. They are huge though and would probably not fit in many cars without a lot of firewall and trans tunnel cutting.
Hey orr89rocz, I have an extra 400 block and an eagle 4.00 stroke 4340 crank and have thought about the turbo route. If you don't mind post some pictures of your set-up. I would like to know where you mounted your turbos and what turbos to use. C5 vettes have a package where they mount them in the back by the back bumper out of the way. There is a lot of tubing but it works great and no real clutter around the engine. A power adder of some kind makes sense whether it's a blower, turbo etc.

 

I wonder how much those new trans would even run. I am thinking the 400 is the way to go for now. As far as mounting the turbo I have seen the remote mount in a 3rd gen where it was all at the back where the factory muffler is. I assume that he then went right into this muffler after the turbo. But I never seen a remote mount twin turbo setup. I have also seen it where the turbo mount right in front of the motor with some custom brackets. About where the power steering and ac is at. I like the idea of turbo under the hood to protect it from the elements I mean like your out driving it like you stole it so turbo is nice and hot then hit puddles and start splashing the turbo. Idk. Sounds like trouble waiting to happen. But what if its under the hood and you route custom intake piping by removing the high beams and just covering it with a screen? Of course a filter somewhere in the system as well. Then a cowl hood for looks and the function of cooling down your engine bay. that's the image in my head.
I also thought about sequential turbo like on the diesels. Small turbo for low rpm followed by a big turbo for high rpm.

 

The 89 turbo trans ams are so strong and are six cylinders. Orr89roczs ride being over 400 CI must be very strong. I had a friend years ago who had one of those dodge Lazers with the turbo and it was very fun. You had wait for the turbo to kick in but when it did it really put you back in the seat and it had to be a small 4 banger.

 

Turbos are great. Look at the suburu sti there 300+ HP 4cylinder and that's factory. check out nelson engines this guy is my hero. Now if I had 50k for one of his motors.

 

check my sig, theres my build thread here in the power adder section.
And yes its a very strong motor, and it will be alot stronger with the new cam/heads

 

Orr has a build thread in the POWER ADDER section. Turbos are fun. Ill go back to one someday. I like my novi2000 for now.

I have a '90 awd tsi tallon. turbo 4 banger. bolt ons,exhaust , etc.. running 20lb boost. Its a fun ride for a awd 4cyl. 5spd. surprises alot of v8's.

I say toss that 400 together with some afr 220+ heads, a solid roller , Vic jr efi , th400 and an s60. and let it rock n roll with twin 62-76mm BB turbos.

 

I just looked at orr89roczs build and he must be an engineer. Making the exhaust manifolds and taking the entire front end apart to fit everything together took a while to say the least. I have seen the pro turbo guys on TV (trailor cars) that have there turbos sitting right up front sucking air where the front license plate would be. I noticed orr89rocz had a 4th gen rear. I am surprised with 800RWH he hasn't broken it yet. He needs a ford 9 for Christmas. I have an extra stealth ram also but no shop to ALL THAT CUSTOMIZATION. That car really is a work of art and a very advanced car for any model. Kindof a super turbota except a chevy. Well its 2:30am and I am trying to pass three kidney stones so I am going to take drugs, dream about turbo's and try to go to sleep. SALUTE orr89rocz, that is a great car and I love how you cut out the front to match your intercooler.

 

Lol I am an engineer by degree, but this setup was just my attempt at a FI car. It worked out well but I'm making a few minor changes to make it much easier to work on.