Turbo Dodge Forums banner
1 - 10 of 10 Posts

·
Registered
Joined
·
166 Posts
Discussion Starter · #1 ·
hey yall i am new to dodge. I have a 89 Voyager. The engine is out of the van.
the kid i bought it form said it has a G head. Aslo have the stock head. I want to make over 300 whp. I have been on FWD performance.
Hear are a list of questions i have.

1. i need info on what pistions and cam to put into it.
2. should i bore the block out? if so how much?
3. how can i tell if it is a g head?
4. what TB should i go with?
5. what head bolts?
6. should i use stock the crank?
7. shold i stroke it?
thanks
 

·
Registered
Joined
·
794 Posts
Hey!

Congrats on your purchase!

Here's some answers to the questions you asked:

1. Forged Venolias or Wisecos, Wisecos may edge out the Venolias in quality, for cam, 88 tbi roller, or fwd stage II.
2. Bore the block out as little as you can get away with. .20 Over is good.
3. G head... search thedodgegarage.com and it will show pictures!
4. TB: is not too important for these cars, but many "upgrade" to 52mm from 46mm.
5. Get 11 mm ARP head stud/bolt kit, along with cometic or MPII head gasket
6. The stock crank out of an 89 voyager is beefy!
7. Stroke it... hmmn. Not sure on the returns from that mod. If you already have the 2.5 (it's pretty much a stroked 2.2) it will be smoking tires regardless.
 

·
Premium Member
Joined
·
10,120 Posts
you need to go through and read a bunch on the forum on the different mods. HP is somewhat easy, consider spending money on the trans first. Pelquin posi and the other rebuild mods to it'll live. Then the stock 2.5 just needs a bigger turbo, an intercooler and a 3 bar computer with more fuel like everything else.
 

·
Registered
Joined
·
166 Posts
Discussion Starter · #4 ·
you need to go through and read a bunch on the forum on the different mods. HP is somewhat easy, consider spending money on the trans first. Pelquin posi and the other rebuild mods to it'll live. Then the stock 2.5 just needs a bigger turbo, an intercooler and a 3 bar computer with more fuel like everything else.
i was read that the stock pistions are good up to 30 pounds of boost. i want to go big.
 

·
Premium Member
Joined
·
10,120 Posts
i was read that the stock pistions are good up to 30 pounds of boost. i want to go big.
The fastest van there is now is Terrys 11.7 second mini, it has a stock bottom end... 35 PSI of boost. Look in the strip section under 11 second mini
 

·
Premium Member
Joined
·
10,120 Posts
an 89 2.5 can take 35 PSI of boost?
Any 89 and newer commen block 2.5 TURBO can handle 35 PSI of boost stock. That question is directed at the engine, the engine can handle it.

You must have the computer, intercooler, head gasket, turbo and so on to use it. Just simply turning up the boost to 35 PSI will run the engine super lean and melt all 4 pistons, which would be dumb of course.

Why can a 2.5 stock handle the boost?

Mahle pistons, with copper added instead of more silica, they can handle heat better. The pistons have a moly ring that can handle more heat and there is a steel strap cast into the piston by the ring lands to make them handle even more shock. A really HD piston for a cast piston. Then the rods are nearly 50% stronger than a V8 Chevy rod. There longer and have larger bolts even, they also are a float pin type. The block is iron not a POS aluminum block with floating cylinders like a Honda. The bores are simeased together and the deck is solid, stock.

35 PSI on a stock engine is around 300 + WHP and torque over 400 ft lbs. With a big valve head, large plenum intake and a header and so on things change pretty fast. Build the top end right and run a huge turbo and the WHP will go past 400 WHP towards 500 WHP these days done right. At these levels the bottom end needs more done to it, but the head and POS 1 piece will restrict power below the limits of the engine.

Clearly simple things apply. Raising the boost to 35 out right, which there is now way a Mitsu turbo can push it isn't going to happen. Then you can just take an engine with 200,000 abusive miles on it with wasted rings and bearings and push it either. A low miler or a corectly rebuilt engine to stock specs will do fine. But you have to restore a van first, there 20 years old. Which takes time and money, then add new mods and take off. A little commen sense goes a long ways. :)
 

·
Registered
Joined
·
166 Posts
Discussion Starter · #9 ·
i was looking online at FWDP. i cant beleve how cheep the parts are for the van!
i wish the camaro was that cheep.
i think i am going with forged rods pistons and a cam.
port and polish the head. bigger turbo a FMIC and meth kit.
I LOVE HOW CHEEP IT IS!!!!!!!!!!! lol
 
1 - 10 of 10 Posts
Top