erikthegoalie

iTrader: (29)

I decided to invest in a forged shortblock..build it up and swap it with my stocker...then sell the stock 346

Here is my question..should I go for a 383 or a 408....i know that the 408 ultimately will be the better bang for the buck...but does it involve buying parts that are much more $$ than the 383...

Also..weight...408 iron...383 aluminum...correct??

Then my third question is streetability...if i go for a 408, i will complement it with a great set of heads and a cam...will i lose my weekend driveability..

THANKS

JL ws-6

iTrader: (50)

go alum 402... ls2 blocks are only about 300 bucks more then the iron block, and no added weight really (other then a heavier crank, etc.)

best of both worlds!

viewsonic

ditto

erikthegoalie

iTrader: (29)

ok..i see i see...didnt know that...

ok..now how about supporting mods...are heads/cam and all that the same for the 408 as they are for the 383...wousl i want to change my pacesetters to something like a 1 7/8 header QTP or Kook...

I already have the 90/90 heard 408's LOVE that!

Any ideas on this matter?

JL ws-6

iTrader: (50)

I'd leave the headers alone, I've seen some people get 10 hp from goign to 1 7/8 headers up on teh top of teh rpm range, but nothing anywhere else, and for teh $ that it's gonna cost you, it's not really worth it. The 90/90 is praticially a must, the elec water pump will help as it will with all setups,your head choice should be similar to the 383, but you can utilize bigger valves and whatnot due to the larger bore, so something that will put that to use would be a good idea, you can also go bigger on the cam and still remain drivable.

viewsonic

I believe the 408, and 402 are all 4.000 bores correct? If so then most heads out there will work fine.

How much do you want to spend on heads? If you are willing to spend a little money I highly reccomend ET Heads!

You will also need anagressive cam with all those cubes

FAST 90 is very good so you are set with that... I am sure you already have some sort of intake so again you are set with that....

I also highly reccomend Kooks! They are a GREAT header! 1 7/8" primaries is prob a pretty good idea.

Looks like you already have nice exhaust...

So beyond those mods you could do things like UD pulleys and an electric water pump.

dalejr8ls1

iTrader: (1)

402 alum. shortblock, there are different builds of this motor with different componets, but its a bad *** engine. Bigger bore is better than longer stroke anyday.

67Ranger

iTrader: (16)

I say 408/402, especially if you want to sell your coplete 346, which will make it much easier to sell.

erikthegoalie

iTrader: (29)

i will be selling my complete 346 it 9only has 20,000 miles on it, its an 02...very little milage...i would sell it as a stock eninge, id put all of the stock parts back on..
what do you think my engine is worth..id keep the tranny obviously
Thanks!

erikthegoalie

iTrader: (29)

who sells shortblock 402's?

viewsonic

It should be worth some money.....


So you gonna go with a 402?????????????????

slow trap

iTrader: (22)

the 408 has a 4.030 bore.the 402 has a 4.000-4.005 bore.unless you plan on spraying i say keep the 1 3/4.as for heads,afr,et or trick flow are all great heads .but the stock casting heads will flow big air from the right companies also.

SVT THIS

iTrader: (27)

TSP and HPE sell 402s. I believe W2W does as well. W2W will cost more money, but if you plan on running boost they would be the very best way to go. The AFR, ETP and Trickflow heads will cost some money, but would flow great. Esp. the ETP 245s. I think you would be fine running some CNC'd LS6 or 6.0l heads with larger valves. You could run some very large valves with a big cam and not worry about PV clearance with dished pistons. With a 6.0 or LS6 head with a larger valve I don't see why you couldn't make plenty of power.

viewsonic

Thanks I did not know that.


What is the bore size on a 383?

xaon

iTrader: (12)

stock + hone. ~3.903-3.905

erikthegoalie

iTrader: (29)

wow so many ideas....i will not be going forced induction..thatll be my next project for sure
I am going out with the gf will be back tonight to continue this discussion!!!

I am leaning towards either the 402 or 408, because of displacement...why not..
BTW Nitrous will be added, but not during swap..maybe after if I feel like it...

soo, probably direct port...i like the system by ZEX that is made for the FAST manifold..its nice...and i woudl be able to give a healthy amount of spray to the engine..

any thoughts...please post, thanks for the replies..

JL ws-6

iTrader: (50)

Avoid teh zex kit, there's plenty of beter options out there that are alot safer and are alot better quality.

xaon

iTrader: (12)

I'd go with the 402, I kinda wish I had just to drop the little bit of extra weight, but I was in a time crunch and had to go the quickest route

AKRA

I was told that if you go above a 383you need to sleeve the block. That makes it very expensive. It is more safe to go with a 383 but you have more increase with a larger CI.

Good luck,

Al

viewsonic

uh.... ok.....


He is talking about buying a NEW shortblock...