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Topic Review (Newest First)
07-13-2012 09:00 AM
68NovaSS On a different note...I changed the title of this thread to read SBC vs. sec, I assume that was your intent.
07-13-2012 05:49 AM
ap72
Quote:
Originally Posted by Short-Bed Chevy View Post
my cousin has a set of 327 heads that he is selling and he said them heads would make a 350 come alive because how big of ports it has on it. what do you guys think and thank you all for all the information you guys have gave me so far.
If they're stock 327 heads then he's full of bull. The miniblower is a really good idea for your application. It'll probably cause you to go over budget but it'll make a hell of a difference. Rering the short block, procomp heads, new roller cam, miniblower, and ms controlled tbi would be a low budget torque king. Finding injectors may be tricky though.

You'd be looking at enough power to destroy a transmission too...
07-13-2012 01:34 AM
Short-Bed Chevy my cousin has a set of 327 heads that he is selling and he said them heads would make a 350 come alive because how big of ports it has on it. what do you guys think and thank you all for all the information you guys have gave me so far.
07-12-2012 08:31 PM
vinniekq2
exhaust/headers

what monte and AP said. Headers are probably the most important part of an engine build.Tube size and length are very important for max power or best throttle respones. The wrong headers can make your power go down and/or driveability suffer.

I had custom made step headers for my car because its special requirements needed that. In a low HP engine,small long tube headers are probably your best choice. All the parts matching is the most important part of the formula.Before buying random parts,research application and how if fits your requirements. Good luck and make sure that 100 mph pass is on a track
07-12-2012 06:44 PM
F-BIRD'88 You cannot deny the effectiveness of these little roots style blowers as a great path to real street/truck performance gains. Especially in trucks that need a big big and streetable engine power/torque gain to get that big heavy truck moving.
And generally have lots of hood clearance

The (blower friendly) engine that goes under these blowers is actually pretty basic and needn't cost a lot to build.

A low compression ratio is key when using street pump gas.
07-12-2012 05:02 PM
spinn Would you consider a 144 roots style under hood supercharger? You have the headers, gear, and overdive trans at stage 2 to back it up. I just rebuild and sold one for a little over $1200. Common to find good complete units under $1000. That is plenty left over for a cam/spring and carb purchase.

You would make a ton more torque and power than big heads and xr284.

My 85 c10 pictured has a 305 vortec 906 heads, Summit headers, and a new E force unit with performer cam. It is pretty exciting. Launches like frogs from a dynomite filled pond. 3.73 gear, dynamic 3000 stall, TH350c w RV level shift kit. .
07-12-2012 04:12 PM
F-BIRD'88 Does this truck have to be emissions laws compliant?
What engine block are you starting with?
new w factory roller cam or older pre 1987 with flat tappet cam only.

You already have good long tube headers but what is the rest of the exhaust system?
07-12-2012 03:53 PM
ap72 So you tried booking up a manometer infront of a muffler and didn't do more than make a mess? Headers are not used for exhaust flow, they're used for intake flow...
07-12-2012 02:13 PM
spinn
Quote:
Originally Posted by ap72 View Post
nothing like pure, fresh, warm HORSE ****.

Headers are one of the BEST parts you can purchase for your car, the next being everything behind them.

Get properly sized headers.
Did you ever use a manometer and determine your back pressure. That determines your exhaust flow. That is not crap.

Some people bolt on headers and claim magnificent gains. I never saw.

I have had the luxury to play with dynometers for a long time. Unfortuneately never really using them going past 6000 rpm. For me and hydraulic cams that seemd like a threshold for power . A wall if you pass there are serious expensive changes, first being fuel. 93 octane did not do any good past 6000.

Money is power and makes the power. That is also a solid truth. What are you doing and how far are you going. 100mph through the traps is not far.
07-12-2012 01:32 PM
78 monte
Quote:
Originally Posted by ap72 View Post
nothing like pure, fresh, warm HORSE ****.

Headers are one of the BEST parts you can purchase for your car, the next being everything behind them.

Get properly sized headers.
Agreed Headers are usually the first mod to an engine.Use 1 5/8 primaries on the street with a mild motor.My car has a mild 350 build but my headers are 1 3/4 primaries(hard to find parts to build 1 5/8 and already had tubes)and it kinda makes the lowend response spongy.
07-12-2012 01:21 PM
ap72
Quote:
Originally Posted by spinn View Post
headers are overrated. Tap a 0-15 fuel psi gauge before your muffler and find the back pressure. That determines how free flowing your exhaust is. Headers may do nothing at all.
nothing like pure, fresh, warm HORSE ****.

Headers are one of the BEST parts you can purchase for your car, the next being everything behind them.

Get properly sized headers.
07-12-2012 01:16 PM
Short-Bed Chevy sorry about that i read it wrong
07-12-2012 01:10 PM
327NUT He didn't say get a big block, he said get a big block TBI unit.
07-12-2012 01:04 PM
Short-Bed Chevy
Quote:
Originally Posted by spinn View Post
One of the first things is maintain 100mph, or get too as you cross the trap?

These days the people still playing are doing it dirt cheap with turbos / supercharghers and stock cams. Less than $1000 in a 450 hp build. No strokers stockish, 305's and 350's. Very street friendly reliable builds.

First hand people add 2.02 valves, headers, and cams over .450 lift . That stuff is only going to help you feel the speed after 3500rpm. Under 3500 the stall speed rating 2400-3200 is going to take up the slack. Gears like 3.73-4.10 are the ticket if you pay the penalty of higher cruise rpm. Not to worry if you have a 700r4, but repair costs and complexity for repair just multiplied by x4 .

headers are overrated. Tap a 0-15 fuel psi gauge before your muffler and find the back pressure. That determines how free flowing your exhaust is. Headers may do nothing at all.

Holleys and 268xe cams are not magic, and possibly not what you want.
maintain 100mph i mean i won't be doing it but i want it to if i need to
07-12-2012 01:02 PM
Short-Bed Chevy So are you saying get a big block or get the big block tbi system sorry just got a little confused there
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