nick05

I was just wondering on how much HP and what 1/4 mile times do you think it will run? Just take a wild guess. By the way, mods are in my sig.

ShiftyCapone

iTrader: (7)

What heads are you running? What is the duration of that cam? Without those nothing in your sig indicates a "suggested" power level.

nick05

Heads are stock 74cc and cam is Comp Cams Magnum 270H 270 degrees Adv. Duration .470" Lift. What else do you need to know?

ShiftyCapone

iTrader: (7)

You have a pretty nice combo except for the heads (assuming they are the junk smogger large chamber iron slugs that you indicate). They are killing you. I would say you are making 250hp and could run mid to high 14's.

nick05

Wow I thought I would have more HP. Is that at rear wheels?

Orr89RocZ

iTrader: (20)

possible higher 13's low 14s with good tire. the heads definately could be hurting. i still think you should be good for 280-300crank

ShiftyCapone

iTrader: (7)

Crank.

Your cam isn't that warm and those heads are pretty ugly. Your exhaust and intake selection are nice but don't yeild much power given the afore mentioned heads. Your cars combo is roughly the same as a B-body LT1 car, but with crappier heads and intake. It is harder than you think to hit 250+ at the wheels.

nick05

What do you recomend to get more HP outa it? Like what kind of heads?

Orr89RocZ

iTrader: (20)

well, good heads will be a start.

performer intake isnt bad, but for some serious performance, go performer rpm with a bigger cam. and some good heads

hell go a cheaper route with vortec heads and get a vortec manifold and 750 cfm carb with a slightly bigger cam than what u got. will make good power. heads is where its at

Ray87Z

I think you're probably making more like 275-300hp myself. Even with smogger heads that don't flow that great you've addressed the cam (it's decent), intake, exhaust, compression (assuming the pistons are supposed to yield 9.4:1 w/ the 74-76cc heads you have), etc. There have been plenty of magazine dyno "budget buildup" tests done that got similar numbers w/ stock smogger heads... Hard to say, the 250hp quoted above is certainly not out of the realm of reason...

The heads are really the key to any SBC buildup. You could easily add another 30-50 or more hp depending on where you're really at now without spending much. A swap to Vortec heads (and corresponding intake) for example would yield quite an increase IMO. Something like some Trickflow heads and a better cam would be even better, quite a large potential for upgrade here.


I'll guess at high 13s to low 14s (more likely IMO) on street tires like it is now assuming it's running properly, decent launch etc... However worse is clearly not out of the question.

TraviZ

iTrader: (2)

you'll run 10's

urbanhunter44

iTrader: (3)

in the 1/8th

freestylzz

I think your being generous with that one.


Maybe a high 10

nick05

Maby at the end of this summer I will buy a 454 from a truck or something and rebuild it, put vortec heads, RPM intake on it, that will give me something to do for the winter.

ShiftyCapone

iTrader: (7)

Stick with your small block. Plus, vortec heads won't work on a 454 big block.

nick05

Oh yeah they wont What do you suggest for my engine if I want to get 400HP at the crank? Same mentioned above, vortec heads and RPM intake? And what do you think it will run in the 1/4 with 400HP?

TraviZ

iTrader: (2)

with nitrous?

10's

ShiftyCapone

iTrader: (7)

With 400hp? I think not.

z28z34man

you could use a little bigger carb 670 street avenger maybe

i like my demon 750 but in retrospect it is too big but i will get it in perfect tune and it will give me plenty of room to expand

Orr89RocZ

iTrader: (20)

my friend with a 83 shortbed chevy is running vortec heads in a caprice replacement shortblock, and a stock Lt1 cam with a 750 double pumper and that truck goes mid 13's at 97-99 all day long. i have seen it a few times and raced him in my car. the double pumper made a good improvement in the seat of the pants department.. havent got to track it yet.

very mild motor and it makes good power.

79vette

I am having great luck with my magnum 270 cam and my Trickflow Twisted wedges. Getting proper rocker geometry was a pain in the rear, but The results turned out great. I am using 1.6 roller rockers though and I shift at 6300-6500 rpm. My car is lighter than most third gens but You should be well in the 12's if you get a better intake and heads, also a 750 cfm carb will help but you could make a 650 work well.This cam likes my 3.55 rear and 700r4 trans FYI.

fastfbody

iTrader: (4)

your heads suck. also you dont need a bigger carb i ran a 600cfm carb on my truck and i ran mid 7s all day (1\8 mile)

nick05

How much HP would it add if I put a 383 stroker kit in it?

fastfbody

iTrader: (4)

you cant just slap a kit in . the block has to be machined first and it would not make much more with those heads

79vette

I think its pretty clear that the biggest gains you will see is when you put better heads on. I think springing for a good set of aluminum heads is gonna be well worth it for you.

lilbowilson

iTrader: (2)

Look you have a good engine already don't try to upgrade to a 383 yet. Your main goal should be getting the best heads money can buy and a bigger $99 cam to go with the heads. That will give you 400hp easy. Top notch heads to buy are AFR, Brodix, Dart, and Trick flow. You can't go wrong with any of them but AFR should be rated #1 because its CNC ported etc. There are alot of iron heads like vortec, world products, and dart that are good too also cheaper. Stick with a 650 carb its very streetable.

An if you really want to do some damage get a solid roller cam setup or hyd!