kelham

What times do you think are possible,
3.4L Forged Longblock
Cast Iron Performance Heads - w/3 angle valve job
Phase 2 Cam - lift .420 exhaust .443
Stock intake w/ 19lb Injectors
Msd Ignition
Performance 660 700r4 Trans
10 Bolt Posi w/ 3.23's
Car weights around 3200
Do you think 14's are possible

2_point8_boy

Should get you high 15's. The 3.23's are gonna really kill you.

kelham

i have a non posi rear just sitting around out of my original v6 with 2.73s or something like that... do you think that will be more suitable ??? whats the best gearing for the car?

2.8RS

iTrader: (5)

2.73s would make you even slower. A good set of 3.73s or 4.10s will help you. Those 3.23s are an improvent over the 2.73s though. I'd exepct for you to run mid 15s at the highest. Thats what I am shooting for with my motor being built.

kelham

yeah i wasnt sure, people talk alot about the v6 rear being more desireable, swapping in 373 isnt too bad, when the build is finished the 3.4 stroker should be around 200 to the crank

2.8RS

iTrader: (5)

Probaby why people want the V6 rears is that we had better gears and they are everywhere in the boneyards.

firstfirebird

iTrader: (3)

Forged bottom end? What crank did you use?

bl85c

iTrader: (2)

And why waste it on 200hp? Or do you have something planned that will need a forged bottom end?

kelham

figured i might as well just incase i ever really want to spray or add some boost, firebird- i've talked to ari about it alot, they offered a forged crank for an additional $200 in their 3.4L motor. Not sure on part numbers, the engines due to arrive in 2 weeks so if theres p/n ill let you know

firstfirebird

iTrader: (3)

I'm wondering what they are considering forged. A 60* forged crank costs about $1200

kelham

yeah im aware, i think the company is TRW or something makes forged pistons but their like 600-900 bucks for the set. I know the crank is forged though, i passed on the pistons, went with hypereutectic pistons, the motors running around 10.1 comp ratio, wish it was a little lower im looking at running a low boost procharger on it, customizing some brackets and giving it a go. prob round 5psi with a 600 series. Thats off in the future for now though, i gotta get the motor and trans in in a few weeks and get some suspension mods done and finish my interior. it just comes down to time???

Project: 85 2.8 bird

a lil for ya when i was fartin around w/the Poncho 400's back in early/mid 90's:

a nodular iron crank will flex before snappiing, forged crank will just snap.

fwiw, the original owner of my camaro got that thing to scream the 1320 in 15secs, 5sp W/3.42 rear from v8 donor. It does 16.5 now w/140k or so on the odometer & 1-2 sift not all that when stomped.

edit: also, (caint remember if the 87's still had this, but) rig the cold start injector for that extra umph.

bl85c

iTrader: (2)

What do you mean by 'rig the cold start injector'?

firstfirebird

iTrader: (3)

You have it backwards. Cast will snap before flexing, fogings will bend.

Do you think a cast rod could do this?....





and this is what happens to pre-86 cranks when making power (nodular iron)...




You can't tell me the racing world has been using forgings for years, cast iron is not stronger or more flexable.