Turbo and TBI Common Blocks

[turbovanman]

Quote:

Originally Posted by marcoze How about this brain teaser? Can i install Turbo pistons in my 2.5 and still run a n/a top end? Crazy question, but worth asking. Also what do you think the stock 2.5 n/a common block rods are good to?

You really need to read up on www.thedodgegarage.com

Sure you can run the N/A top but why?, I assume you mean the tbi setup, will not flow enough fuel and you will have to make a custom intake hat/air cleaner assembly for the pressurized air. Not to mention the MAP only reads vacuum.
Stock tbi CB is the same as a turbo block so will take 4-500 easy, just ask Gary D!

As for running tbi pistons, around 9:5.s comp versus 7:8.1 for turbo and I woulnd't do it, I did and melted it down at 12 psi intercooled. You can only run small boost, if you want to run higher, need race fuel and watch your air/fuel very closely as Putter just found out.

[marcoze]

Everytime i ask a question i get directed to www.thedodgegarage.com And every time ive said that ive read the site many times over.

What im actually talking about is running n/a (Meaning no turbo) with a n/a head, and the TBI setup. with turbo pistons installed. Because im probobly gonna pull my motor very soon to build it but am not sure if ill have everything ready for the turbo setup.

And if everyone just went to thedodgegarage, we wouldnt need this forum would we? All i want is peoples opinions, maybe they have tried it before. If we all followed one person it would be called Comunism.

Quote:

Originally Posted by turbovanman You really need to read up on www.thedodgegarage.com Sure you can run the N/A top but why?, I assume you mean the tbi setup, will not flow enough fuel and you will have to make a custom intake hat/air cleaner assembly for the pressurized air. Not to mention the MAP only reads vacuum. Stock tbi CB is the same as a turbo block so will take 4-500 easy, just ask Gary D! As for running tbi pistons, around 9:5.s comp versus 7:8.1 for turbo and I woulnd't do it, I did and melted it down at 12 psi intercooled. You can only run small boost, if you want to run higher, need race fuel and watch your air/fuel very closely as Putter just found out.

[Putter]

Quote:

VANMAN: As for running tbi pistons, around 9:5.s comp versus 7:8.1 for turbo and I woulnd't do it, I did and melted it down at 12 psi intercooled. You can only run small boost, if you want to run higher, need race fuel and watch your air/fuel very closely as Putter just found out.

Well, I didn't really find anything out becuase the engine did not fail, so you cannot really make an example of me. I did however learn I maybe should have knocked the boost down a psi or two, I knew the safe limit was 10psi for longevity, but I didn't really care about longevity with this motor. Its still intact with no damage done, its just getting different pistons for the water/air intercooler and t2 conversion.

You are correct though, I wouldn't recommend running the high CR for longevity purposes or a daily driver, but this car is purely a toy for me and I have plenty of stuff around if I do smoke a motor.

Like you say, you can run the turbo pistons but you are going to have nothing for power with a TBI motor @ 7's c/r......

[marcoze]

Putter were you running the N/A Head with Turbo exhaust valves?

[Putter]

I am currently running n/a exhaust valves and am going to continue to do so, but I would definatly recommend upgrading to the turbo exhaust valves. You will have much better durability and longevity with the better valves.

The reason I havn't changed is because I have a number of heads that are runable, if I burn one, I'll update one of my other heads and slap it on.

[turbovanman]

Quote:

Originally Posted by marcoze Everytime i ask a question i get directed to www.thedodgegarage.com And every time ive said that ive read the site many times over. What im actually talking about is running n/a (Meaning no turbo) with a n/a head, and the TBI setup. with turbo pistons installed. Because im probobly gonna pull my motor very soon to build it but am not sure if ill have everything ready for the turbo setup. And if everyone just went to thedodgegarage, we wouldnt need this forum would we? All i want is peoples opinions, maybe they have tried it before. If we all followed one person it would be called Comunism.

I realize that about thedodgegarage but a few questions you asked were easily answered there, no foul though.

As for turbo pistons with a tbi setup, it would run like crap, you would have no power due to the low CR and probably run very rich. If you don't have the funds run the tbi pistons then swap over to turbo pistons when you get your turbo setup, easily done, you can even reuse the rings if you rering it.
Also, if using an n/a head, again, I would swap over the valves and springs, for the time and effort, easier and cheaper to do it right the first time and running turbo valves in a tbi won't harm anything.

[marcoze]

over the last hour i finalized my plans pretty much.

T2 intake, 52mm TB off of a neon (Yes, i am aware that i need to modify the TB and port the intake), Custom Ported exhaust manifold (I can port that myself), Turbo Pistons slung on my stock TBI Rods unless i can find Free/Almost free turbo rods, TBI Head with Turbo valves and springs, along with a Turbo Cam. For the time being im just gotta toss on whatever turbo i can find that will fit, and is in good condition. Im probobly gonna take the block out .020 due to mileage, and im betting it needs it. Im also gonna run a Powerstroke intercooler like ive seen on another minivan. Also im contimplating either Alchohol inj or Nitrous (I have experience in nitrous, not alchohol however) injection.

Sorry to hijack the thread, but i really didnt want to just make a whole nother thread.

[turbovanman]

Quote:

Originally Posted by marcoze over the last hour i finalized my plans pretty much. T2 intake, 52mm TB off of a neon (Yes, i am aware that i need to modify the TB and port the intake), Custom Ported exhaust manifold (I can port that myself), Turbo Pistons slung on my stock TBI Rods unless i can find Free/Almost free turbo rods, TBI Head with Turbo valves and springs, along with a Turbo Cam. For the time being im just gotta toss on whatever turbo i can find that will fit, and is in good condition. Im probobly gonna take the block out .020 due to mileage, and im betting it needs it. Im also gonna run a Powerstroke intercooler like ive seen on another minivan. Also im contimplating either Alchohol inj or Nitrous (I have experience in nitrous, not alchohol however) injection. Sorry to hijack the thread, but i really didnt want to just make a whole nother thread.

Sounds like a great plan but why go to all that hassle of rebuilding everything and then using the puny TBI rods????? Wouldn't you just kick yourself if one let go and punched out your block over $100 or so. Check out the forsale section or www.fwdperformance.com

[marcoze]

Maybe you know, on Advanceautoparts.com they have "Reconditioned Rods" for 35 bucks or so. (I got this part by saying i had a 89 turbo caravan). Do you think its for a whole set? They dont say anything about being individual sales. Shipping weight says 4lbs. I have no idea what these rods weigh in at so i couldnt judge it on that.

[Putter]

those are 35 each, and try to find turbo2 rods, they are much stronger, they have a full floating pin

[marcoze]

alright thanks

[turbovanman]

Quote:

Originally Posted by Putter those are 35 each, and try to find turbo2 rods, they are much stronger, they have a full floating pin

Geez you guys, get this straight, 89 and up T1 rods ARE T2 rods.


So him listing a 89 Turbo van, he is getting the correct strength rods.

Good job on changing out the rods, and make sure the bolts are new or use ARP's.

[Putter]

Well you know down here in the iowa, all we really know is how to grow corn....or is it potatoes...hmmm in 89 up all the potatoes are the same....or is it the corn? Da ummm my tractor has a turbo...but i don't think it has T2 rods....

So after 89 the only t1 engine was the 2.5 which had t2 rods correct?

[turbovanman]

Quote:

Originally Posted by Putter Well you know down here in the iowa, all we really know is how to grow corn....or is it potatoes...hmmm in 89 up all the potatoes are the same....or is it the corn? Da ummm my tractor has a turbo...but i don't think it has T2 rods.... So after 89 the only t1 engine was the 2.5 which had t2 rods correct?

Correct, all 89 and up CB turbos came with T2 full floating rods.

[Koreth]

New question regarding this hypothetical block (which I do plan to eventually build). Is there any strong cases for or against any one particular brand of forged pistons? Weisco from TU, or Venolias from FWD Performance? I know the Venolias have those spiral lock thingys on the wrist pins versus the stock circlips, less likelyhood of the writstpin comming loose and scoring the crap out of the cylinder wall or something like that. Are there other pluses or minuses to Venolias or any other brand of forged pistons that I should know about? I cannot used the forged pistons from the T-II currently in my daytona, and this is why.