A TH400 is a 3 speed. A 700R4 isnt worth building if you are going to beat on it. They just take too much money to run power thru and still dont hold. If Six Speed Inc can go 8s in their T56 car i am sure they can reccomend a clutch to keep me happy, i have no problem swapping a clutch every 3 months if i had to but im not going to be on the track enough to really have to do that.

 

Oh and remember that at any kind of high speed your car WILL NOT handle with a Supra if you have to make and sudden turns. Those cars are SUPER stable compared to ours.

A friend of mine destroyed his DSM when he had to make a sudden turn racing a Porsche....... Porsche made the turn just fine, he did not.

You could also go 4L80, thats pretty much a TH-400 with an overdrive.

 

4l80 might be a good optoin, and i dont have to worry about taking turns in that car, it wont be build for that. And trust me when i get done with this 540 i will be so much faster than a 800hp supra i will have time to slow down for the curve, than speed back up lol . Im planning on shooting a 300 shot it it also, and maybe down the road a couple 110mm turbos. lol lets see that supra run with that.

 

Twin 110's? I think you can get 6's with twin 88's threw a 5XX motor hahaha.

Id really look into that 4L80 honestly............

 

Yea i didnt even really think about the 4l80 but that is a good idea. I love turbo charged v8's so maybe if i have the money someday i will put some turbos on it. But anyhow. The girl is really convincing me off buying the 400 instead and building an all forged 427 or 454 sb. since i can still use the same altenator, starter, water pump, and all that **** that i already have on the 305. And i can just give it a good heads and cam package and rev it to like 9k. And spray it. I could have it build before summer is over, but the BB would probably take me till next summer at least.

 

Ive found some kits to build it to a 427 or 440 with a .570 lift cam that floats at 8k rpms, and dome pistons for nitrous. That can all be had for less than 2k.

 

Damn, a 4L80 is EXPENSIVE to build. I have WS6 suspension on my car, the thing that would hold me back on high speed manuevers would be the 15 inch wheels with tall side walls. My car is incredible with a 17 inch wheel and tire combo, kina scary.

 

Like I allways say guys......... going fast and it being reliable is NOT cheap.

Yep those trannys are not cheap to build put pice out a built TH-400 and a gear vendors overdrive, that overdrive alone is like two grand.

So in the end the 80 is not as expensive as you think.

 

Well, a TH400 only needs 3 gears to go down the trak. I will allways have a stick in my street car. The first pump gas drags was won by a 8 second chevelle with a big block and a stick. Not bad.

 

If I remember right most faster stick cars use 3 gears sometines 4 to get down the track.

 

Depends on rear final drive ratio and rpm capability of the engine. The chevelle was a 4 speed so it had the same final drive ratio of a TH400.

 

So then why not just have a 3 speed if you will end up with the same PRM???

 

Steeper first gear, ending in not having to have a ultra deep rear gear. It is a street car so it would help with the drivability.

 

Would it be cheaper to build a th400 or a 4l80e or put a 6speed in it. The reason im so stuck on the 6speed is cause it would be fun to drive around town, and i can put 4.56 gears in the back, have a good bottom end, and some rpm's to spare for the highway.

Dont get me wrong this wont be a daily driver, but i will have to drive it on the highway for some period of time to go to the track, or anywhere in this area.

 

Manuals are the **** on she street, it is why guys like us cannot get over them. It depends on who builds the trans. I am still trying to find a flywheel that will work on a T56 on a big block.

 

The way I look at is if you miss a gear you are done, clutches tend not to last, car is not as consistant, ect ect.

For those reasons if it was me I would go 4L80.

You can re-grear Auto cars, in the hear future after more motor work Ill go with a Rossler 400 with different gears ect ect and a Neil Chance stall......

Remember rear gearing and tire size is key, my RPM's are lower then a 4L60 with the same gears and next size shorter tire. I would not worry about the highway unless you are on it A LOT.

The cheapest and most reliable way would be to go 400, I would only go 80 if it was on the highway A TON and more of a long distance cruiser.

 

Yea, consistancy is not a concern for a car that is street driven as much as mine, i would be running other stick cars anyways. Not to mention i wanna do the Texas mile event That is where it would shine also. As for missing a gear, that is what a rev limiter is for right?

 

alright well i think i came to my decision. This isnt set in stone but i do have all the parts picked out.

Im going to get the 400. bore it, stroke it, and forge it. to a 427 or 454. Just depends on if i can take it that big or not. Then boost it. And probably spray it also.

 

454 out of a standard 400 block???? Don't think you can do that safe with a factory SBC block.

From what you are wanting to do I doubt a factory block will hold up or at least I would not want to try it. I would at least get a little M or something.

 

Deffinatly agree, i am only going to push my 400 build one day to 600ish on motor and maybe a 200 hit of dope due to seeing that work on several ocasions.