reamo04

iTrader: (9)

how much power are you at right now? Friend of mine was mid 500's N/A with his 408 with room to grow lol.

I would go 80mm turbo w/ truck manifolds

30th t/a

iTrader: (51)

I had 2 twin turbo kits and If I went FI again, id most likely go Procharger, or maybe a single using truck manifolds.
Twin turbo kit CONS
*Below 3000 the car was a dog and had NO throttle response which made regular driving not fun
*NO room to work on anything
*Had to cut up the car to get everything to fit correctly
*more $$$ over a single turbo or procharger

Pros
* above 3000, the power will scare the sh*t outta you
*stealthy sounding (outta boost)

If I did go FI again on a 346/347cid, Id keep the CR up around 10:1, get a good cam and heads so that when out of boost, the motor isnt a complete dog around town. And I would be using Meth injection.

Both of my turbo setups I used a forged 347 with 8:5:1CR LS6 cam and stock 317 heads so I think thats the main reason why the car felt so sluggish below 3000.

reamo04

iTrader: (9)

what size turbos were you using? for a 346/347 i recommend 62mm's with a smaller back side. My buddies mustang with 62's was full boost around 2800 with them, so you must have been running like t70s or something?

30th t/a

iTrader: (51)

t3/TO4e 57mm's

bad6as

iTrader: (17)

yeah i wonder what one of thoes would do with less weight and more boost?

fatmat80

d1sc on a 347 will get you your power level and at a reasonable price to boot...

Chris'stransam

iTrader: (7)

So its kinda even on turbo and supercharger

Texas_WS6

iTrader: (9)

No, the pros to a turbo is with all of the turbo selections and the fact the difference in price from say a 60mm turbo to a 88mm turbo is not that large. Your HP cappability with a turbo is very large. But the con to a turbo is there are very few if any "Kits" that you can just order and get next week and throw it on the car yourself with perfect fitment. So a turbo kit will take much longer to get, fittment can be an issue, if you build it your self it can be very labor intesive, and there is a much higher chance of bugs to work out before it is all perfect.

The pro to the supercharger is kits are avalible, they usualy come with everything you need, and there are few if any bugs you have to work out. Usualy the only time you have bigs with a kit like the ASP procharger D1 kit is when you start to modify the kit from as shipped. There realy are no cons to the Procharger kits. They do what they claim.

Is kind of why there is Ford, Chevy, and Dodge, different strokes for different folks. I am a turbo guy myself.

For the HP goals you stated you wanted, the cheapest, symplest setup FI wise is probably the Procharger D1 kit.

SVC707

iTrader: (33)

i dont like to type so much on debates, but my opinion..... i went from a d1 at only 9psi 408ci hit over 730hp/650tq 6200rpms, with the correct cam etc thats was on pump gas convservative tune. swaped out the cam and now have a kytp s88 and hit 700hp/820tq !!!! @ 4600ish rpm... clutch went out.

i got tired of the sc whine but i loved it at first, now the setup runs quiter but when it spools ... if you run a kytp setup it actually does not cost alot of $$$ ... s/c you still want to get a good set of headers and custom true duals.

Texas_WS6

iTrader: (9)

What ever you do, once you go FI that 500 hp goal will be way way broke! Thats the problem, you need to be looking at the supporting mods to handle the kind of power you will end up making with any FI system. Its not like a cam or intake change, it will make seriuos power even if you do not have a good combo. My friends D1SC setup (his combo is good) was a very easy build, he has a 6.0L with forged rods and pistons, set up to 9.5:1 compression, stock 6.0L heads with good springs, stock TB, the correct sized injector, and thats pretty much the engine build. I have no idea what the HP is but he cuts 1.49 second 60fts all day long and runs 10.60's at 128mph at a track that is 3400 feet and the normal DA is over 6000ft. It took only three passes to get the car tuned to these numbers, and we know there is more in it, it is running a little fat still and we only have 13 degrees of total timing in it right now. I am sure when we are done tuning it it will run in the 9's here. It is street legal, has AC and an aftermarket stereo too. Of course it is usless to stab the throttle on the street, it will do a donut on the street from a 60mph roll, VERY DANGEROUS on the street.

It realy comes down to how much money are you willing to spend, how much custom work you are willing to do to your car, if you like the lope of a blower cam and the whinning of a blower (which I love) or if you want it to sound stock and give off no clues its nasty until the turbo spools up. Turbo cars usually do not lope as much and do not make any noise to clue someone off until it is too late for them. they both work great and a symple small setup will make way more power then you stated.

If you go Fi you might as well forget about 500hp and get ready to build the rest of the car for pig big power, rear end upgrade, trans upgrade, drive shaft upgrade, suspention upgrade, fuel sytem upgrade, etc..

Let us know what you deside to do.

ninetres

iTrader: (35)

My turbo car is lopey as hell, and under any sort of accelleration my turbo at least whistled a tad. You just can't hear the turbos at idle or cruise.


......just sayin.

SVC707

iTrader: (33)

same here, mine lopes and rocks the car at idle. but thats not the question... im saying from actually being able to say ive done both the procharger and s88 turbo, long block and intake manifold the same. turbo is a way better option. if youre going to play the game of modding your car, we all know there is no such a thing as a budget build.