Trucks & Trailers - little more umph for pulling

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View Full Version : little more umph for pulling


omcstratos
03-10-2011, 07:25 AM
I have a 94 Chevy z71 that i pull by boat with. it will pull my boat just fine but it just takes a little bit more distance to get going. I was wondering if there were any easy fixes to bring up more power and torque out of the engine. The engine is the throttle body injection 350 (2 years before vortec). It has already has the towing package/ regearing. Any input would help. Thanks


JRussell
03-10-2011, 10:17 AM
You could put stock Vortec heads and an intake on it...if you want to tear into the motor a little. I would search Google or some Chevy forums because it's a pretty common thing. :thumbsup:

slush
03-10-2011, 10:34 AM
How do those trucks respond to long tube headers?


DoubleO7
03-10-2011, 10:57 AM
What size tires and gear ratio are you running now?

ss3964spd
03-10-2011, 11:27 AM
I was wondering if there were any easy fixes to bring up more power and torque out of the engine.
By "easy" I assume you are referring to easy bolt on's. If so then in a word, no, no bolt on is going to make enough difference to notice.

In my opinion, you'd need at least an additional 30 Ft/Tq between 2000 and 3500 RPM's to really make a difference. In order to get that kind of gain you will have to open up the engine. Better flowing cylinder heads, a camshaft to match the head flow characteristics, perhaps a less restrictive exhaust system.

Or, a different truck.

JRussell
03-10-2011, 01:17 PM
How do those trucks respond to long tube headers?

Just a guess, but probably gain a little on the top end but at the sacrifice of losing a little TQ down low. Still not enough to really notice a difference either way.

Jonboater
03-10-2011, 03:12 PM
Leave it alone and save your coin for a newer truck some day. Those TBI engines had great low-end torque just no horsepower in the revs. Keep it well maintained and let it run the way it was designed IMHO

omcstratos
03-10-2011, 03:30 PM
It has a self done air intake i made myself and a k&n filter. stock cats and a super 44 muffler. How much of a gain would the vortec heads make and would i need a new intake manifold? I can easily get these from the junkyard and do it myself?

1998 proline 241
03-10-2011, 04:00 PM
You could get a high performance chip.

Jonboater
03-10-2011, 05:11 PM
It has a self done air intake i made myself and a k&n filter. stock cats and a super 44 muffler. How much of a gain would the vortec heads make and would i need a new intake manifold? I can easily get these from the junkyard and do it myself?

Yes you will need a new intake to fit to the vortec heads. Your going to have a big restriction with the stock throttle body too. Not to mention a computer change just to make it run right. Your engine makes around 210hp the vortec was 255hp. So figure if you get everything working right you would be somewhere in between.

You could always find an entire 5.7 vortec truck at a yard and rob the engine/tranny/computer all at once.

805gregg
03-10-2011, 05:30 PM
Your ready for a new truck, how about a new Chevy, my friend just bought a heavy duty 3/4 ton 4x4 2011 for with a 6.2 gas for $34K.

jt151melton
03-10-2011, 07:54 PM
X2

thefermanator
03-10-2011, 09:14 PM
VORTEC heads will not really help out with towing. They WILL boost upper RPM HP, but you WILL lose bottem end torque. TBI engines respond VERY well to mild head porting and a cam swap. I've built a couple of them now, and they are up around 275-300HP with the old TBI swirlport heads on them(they have dyno'd at 260+ at the rear wheels with torque numbers knocking on 375). A decent set of mid length headers, free flowing exhaust, a cam swap, and some mild port work will make it hang with a VORTEC, but out tow a 5.7L VORTEC any day of the week. The problem is though that the TBI engines can make so much bottem end torque that the trans becomes a serious weak link in them. By the time you get the extra oomph from it, you could have traded up to a newer truck most likely with the extra power. If you like teh truck and plan on keeping it, I would do a cam swap and a set of headers along with portin the throttle body as a minimum, but be ready to drop $2K in teh trans to make it hold it(unless you can build it yourself in which case your looking at $700-800 in parts). If your not up to going into the engine though, there isn't alot that can be done for a TBI engine.

MacCTD
03-11-2011, 11:14 AM
Your ready for a new truck, how about a new Chevy, my friend just bought a heavy duty 3/4 ton 4x4 2011 for with a 6.2 gas for $34K.

They do not offer the 6.2L in the 2500s, only the 1500s, big difference in power.

rwidman
03-11-2011, 04:15 PM
How much money are you willing to invest in a 17 year old Chevy truck? ;?

dahlbebop
03-11-2011, 08:29 PM
This was referred to me, maybe they can help you out:thumbsup: Have'nt ordered mine yet, but this guy mike is suppose to be great. Check out the site and what people say. The guy who recommended to me has a V10 like mine and said its unbelievable the difference

http://www.5startuning.com/

JJR
03-11-2011, 10:08 PM
How much money are you willing to invest in a 17 year old Chevy truck? ;?

Youd be suprised. There is a huge following for these trucks. I know I wouldnt trade my old body, POS, 210,000 mile chevy for anything. Well at least not yet.

rwidman
03-12-2011, 08:00 AM
Youd be suprised. There is a huge following for these trucks. I know I wouldnt trade my old body, POS, 210,000 mile chevy for anything. Well at least not yet.
Yes, but somebody hits it and the insurance company hands you a check for $100.00. :(

seaeagle2
03-12-2011, 11:19 AM
I've got a 92 K1500 with tow package 373 gears, here's my mods. I tow on a stretch of freeway with a grade so I've been able to do "seat of the pants" comparisons over the years of what difference my mods made. Stock I could pull the grade at 50 and if I had to let off, ie someone got in front of me, I was hard pressed to get back up to speed. 1. Doug Thorley tri Y headers and new hiflow cat, 55 mph, and if I had to slow down, I could get back up to 55, plus it has a nice rumble but not totally obnoxious. 2. Edelbrock mpfi conversion, (no longer made, but they're still out there I got mine used for 350 plus 150 for new fuel pump and hose and fittings), and a custom dyno tuning, I can pull it at 60, and if I have to slow down, I can get back up to 60. I also had a gm goodwrench crate 700r4 tranny installed a few years ago, and transmission cooler and transmission temp gauge. I installed the gauge before I installed the cooler, and if really makes a difference in the operating temp of the tranny. As far as a replacement truck, Personally to replace this I'm thinking either a Titan with a 5 speed auto or a 2009 or newer F150 with a 6 speed auto or a newer Dodge with a hemi and 5 speed auto, so I'm still looking at over 23 grand, vs another 3 or 4 grand into this for a new motor and programable computer.



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