Im swapping a Holley SBC Intake to my friend.

In exchange I'm getting 2 2.8 motors. (Almost 2 full sets of Acc's.) Also coming with the Dual Snorkel Intake.

Im also getting a 700r4 thats on its last legs. Slips its *** off.

What should I do? With all these v6 parts, I wanna keep a v6 for a while longer. Im just looking for ideas/suggestions.

And no turbo/SC. I'd be interested in No2 tho...

 

I don't think the dual snorkel fits on anything smaller than a 305... Correct me if I'm wrong.

There has to be something wrong with each of those 2.8s for you to be getting 2 of them for just a SBC intake (unless it's an uber-expensive intake).

If the trans is bad, you're probably better off just scrapping it... Especially if yours is in halfway useable condition. Either way, if one has probs, you will need to have it rebuilt (big $$$$), rebuild it yourself (kit is kind of $$$ but the tools you need to do it are big $$$$), or just get a rebuilt one (still big $$$$).

Oh, and it's N2O...

:edit: Since you have a bigger engine already, why are you even thinking about a smaller one unless you plan to do some top end work?

 

Okay, heres the full story. lol

Im selling the Holley manifold, 750 carb, and chrome valve covers for 100 bux to a friend of mine.

The 2 motors and 1 tranny knock off 50 bux.

One motor does actually run, and the other spun a crank bearing. both motors can be pieced together into a fairly solid one, as is.

What i wanna do is, 3.1 crank, dome pistons,slight overbore, cam, headwork, headers, and nos.

The kicker is, I wanna fab up a custom Cross-Ram intake. The stocker LIM/UIM is far too restrictive, and too much of a hassle to free up.

I think for the tranny, a TransGo ShiftKit, 2k-ish stall convertor, Vette servo, and a posi unit for my 3.23's in the back.

Any thoughts or Suggestions?

 

Well, for starters... 3.1 crank+dome pistons equals disaster, even with N/A, and forget about NOS. The compression ratio would be WAY too high to even THINK about that... 3.1s have dished pistons to keep the compression ratio DOWN and usable.
Shift kit won't help the transmission if it's slipping... You would need a Tranny in a Box kit and you would have to replace all of the seals AND the clutch packs, not just the springs in the accumulators and the valve body assembly...
It's also been shown that our intakes are good for torque... Ask anyone going forced...

BTW, you sold yourself short in that deal... And I'll bet the other guy is laughing...

 

The dual snorkle will fit your 3.1 with some work and be an upgrade to what you have. I did a post ALONG time ago on how to do this.

The tranny. You can experiment on rebuilding it yourself. Or keep it to the side and when yours STARTS to act up, take this extra one in and have it rebuilt while your still driving on yours.

As for the motors....
Take the one that is shot and junk it(unless it is the newer year). Just keep the intake and accessorys.

Other. Find a 3.1 rotating assy and have it rebuilt with that like you planned on. Just the 3.1 has 8.5 compression, you could get custom pistons to bump it to 9.0 or 9.5.

 

To Mav:

I know that a shiftkit wont help a bad tranny, thats why im getting it rebuilt and using the TransGo at the same time.

Also, our intakes may be good for torque relative to the norm of whats on top of most thirdgen camaro v6 motors, but, you cant tell me that the intake is dog $h1T.

Also about the deal I made. The intake was free, the carb (free) needs rebuilt (comes with kit), and the valve covers (free) are just regular Mr. Gasket chromes.

Thanks for the info about compression tho.

To All:
Are we talking about the same dual snorkel? Im not talking the kind commonly seen on SBC's. Im talking about the stock 89 2.8 one. Comes from the TB down to right under the hood, with two seperated filters. Kind of a stock cold air.

And if this doesn't seem like a good idea... How about my backup plan?

406 sbc out of an late 70's K10 Blazer or alike, completely rebuilt, putting out around 400-450hp.

Sound better? lol

 

Just thinking of a 406 SBC gives me a chubby. You should go with that.

 

Ah... I thought you meant the dual snorkel air cleaner commonly found on carbed V8's... .

Good deal for the trans then, but what do you plan to do with your existing one? Personally, if you are going to put all that work into a trans that is the same as what you have under there, I would rather stay numbers' matching...Rebuilding your existing one with the shift kit and scrapping the other in pieces to help pay for it (case alone is worth more than most places will give you for a whole trans, plus you have all of the pistons and what not inside that some of which are also aluminum, and then all of the heavy steel parts) would be what I would do, but I'll just rebuild mine (my stock trans is sitting under my workbench in the garage with a bad TCC) doing the same and sell it, I hope. Otherwise all of that work would be for nothing, unless I can find a decent roller without a powertrain...
This is, unless you need to keep your car on the road and need the other trans to have something rebuilt and ready to install for when you do the swap so you can have minimal down time...

If you're looking for that kind of power, a V8 is the way to go, but you would also need to replace a number of things before and while you're putting that beast in. You may also have to deal with a higher insurance rate if they do inspections...

BTW, anyone know the CR of a 3.1 crank with 2.8 pistons?

 

i do belive that that combination will put the 2.8 piston out the top of the bore by a good bit

 

This is the order of what I was wanting to do.

1. Keep my original motor and tranny for the #'s.

2. Build a badass 406 for LATER later on.

3. In the meantime, make a "decent" fun v6 to thrash on while working on the 406.

4. Either have some fun and blow the motor in the process of having fun, or sell the whole combo for cheap to somebody willing.

5. Put the 406 in the car, and keep it going for a good couple years.

6. Put the original v6 back in the car to restore, and put the 406 in another thirdgen.

Sounded good, but it might be too many things at once.

I must be deciding right now to go ahead with the 406 unless i get bored.

Thanks for the replies all.

Anyone need any parts? lol

 

it is true... the 3.1L crank has too long a stroke with pistons that are 4mm taller than the 2.8L pistons...

it does not work... I have tried it myself