Dart with TPI 305?

[PWMAN]

OK I was plugging stuff in my desktop dyno. All these results are with mild porting(too much takes away low end torque and throttle response), 9.5:1 compression, 1.94/1.60 valves, dual plane intake, 600 CFM carb, and open headers.
Again I'm not sure if a 1.94 valve will fit. You might only be able to fit a 1.88 or 1.84 intake valve. Unless of course you bore knotch.
Now by adding a 400 crank, add 30 ft/lbs to these figures. These figures are just with stock stroke and .030 overbore.

The first cam I mentioned, you would have 350 HP and 375 ft/lbs. Second cam, 365 HP and 370 ft lbs but at higher RPM. A mild higher stall converter would be good like the TCI Sizzler.

roller cam-380 HP and 410 ft/lbs. TCI Sizzler would do good here too, unless you put in 400 crank then stock converter would do.

So you are going to max out at 380 HP, unless you get aluminum heads and run more compression. Or more cam but your torque will definitely suffer if you go any bigger than the ones I mentioned.
Of course you could always bore knotch, run aluminum heads with 2.02/1.60 valves, 10:1 compression and you would have your 400 HP. But thats pretty expensive.

[chevy305man]

yea it will cost a lot of money but i need/ want my torque pretty badly...i want my truck to be the best at school, one thatll get up and go

[chevy305man]

wait what about the friction free roller rockers and lifters.... will those do any good cause i know for sure we have those already in the motor and im almost sure that theres a performance cam in it too....ill know on saturday when im really goin to tare into this thing

[PWMAN]

Originally Posted by chevy305man

wait what about the friction free roller rockers and lifters.... will those do any good cause i know for sure we have those already in the motor and im almost sure that theres a performance cam in it too....ill know on saturday when im really goin to tare into this thing

They don't do much, maybe 5 HP at your peak.

Whay year is the motor? What vehicle is it out of?

[chevy305man]

woah 5? in the catalog and on the box it says 20-40 extra hp.... but if im corect the motor is a 88 and it was out of a camero i think and its fule injected....

[PWMAN]

WHAAAAAT? LOL I don't think so. What brand are they? Aluminum? Part #?

1.6 ratio?

You have to remember that all HP claims are going to be in the best of conditions, and probably running radical cams and making insane HP. Like for example it's easier to gain 40 HP out of an engine thats making 800, but you will NEVER get that only making 400. So 20 would be your best, and thats if you have the 1.6 ratio rockers so it increases your lift giving more HP. If you only got 1.5 ratio rockers than do not expect any more than 10-if that.

[PWMAN]

Originally Posted by chevy305man

if im corect the motor is a 88 and it was out of a camero i think and its fule injected....

Hmm, those could be vortech heads with 1.94/1.50 valves. Those would be good to keep, but if you really want to make power get the Aluminum Vortech heads from JEG's. They have 2.00/1.55 valves, plus they are aluminum and you can run 10:1 compression with a mild cam. They are complete and assembled, but cost 599.99 each. But you would definitely have your 400 HP and 400 ft/lbs. Those are about the best heads you can get for a 305.

Hey I just thought of something else, an 88 should have a hydraulic roller cam from the factory! You are all set, 400 ft/lbs easy. So get the roller cam I mentioned above.

[chevy305man]

ok, the roller rockers are Harland Sharp that are on my motor are 1.65 ratio 7/16 stud part number CSP-1006 from summit magazine.... alrighty, well then i am set all set, but how much is the roller cam gunna be for my 305? and what brand....

[PWMAN]

Originally Posted by chevy305man

ok, the roller rockers are Harland Sharp and the that are on my motor are 1.65 ratio 7/16 stud part number CSP-1006 from summit magazine.... alrighty, well then i am set all set, but how much is the roller cam gunna be for my 305? and what brand....

you might get 20 HP over stock from them, and thats pretty good. Just make sure you have clearance and generous valve reliefs, so you don't bend a valve or 2.

Comp Cams Xtreme 4X4 series, Grind number X4270HR and part number 08-413-8
You can get it from Summit, you just have to call them up and tell them you want to order something not in their catalog. But they can get it from Comp no problem. They will ask for part number and grind number probably.
Umm, for price I'm not really sure. Roller cams are expensive, and you can reuse your lifters. I'm guessing 200-300 for the cam, the lifters if you choose to get them will probably be another 200. Depending on how worn out your stock ones are you might not need new ones.

[chevy305man]

what if i keep my stock rockers in it? should i still sit pretty good? and thats about the price i was expecting but i think my dad can get a deal with that and i went out and saw my motor tonight and my liferters look in great condition so im safe there but i think ill let my dad do the ordering for me

[chevy305man]

what if i keep my stock rockers in it? should i still sit pretty good? and thats about the price i was expecting but i think my dad can get a deal with that and i went out and saw my motor tonight and my liferters look in great condition so im safe there but i think ill let my dad do the ordering for me

[PWMAN]

Originally Posted by chevy305man

what if i keep my stock rockers in it? should i still sit pretty good? and thats about the price i was expecting but i think my dad can get a deal with that and i went out and saw my motor tonight and my liferters look in great condition so im safe there but i think ill let my dad do the ordering for me

The stock rockers will work fine.
Roller lifters usually last a good while.