I'm trying to milk a little more speed out of my ride, and right now I'm debating between two options. First, install a 100ish HP shot of nitrous, but then I'd have to buy something like a msd 6al or something along those lines. My other option was to have my heads machined, ported and milled to increase my compression from 9.5 to aroun 10. Which one would you guys go with? The head work will probably cost less, but I'll have to run higher octane gas.

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1986 Z28
383 ci Stroker, Dart Sportsmen 2 heads, roller rocker arms, Crower Hot Street Beast cam, edelbrock 750cfm carb and performer rpm intake, Corvette Servos, shift kit and 2600 rpm stall convertor, 3.73 gears and Eaton limited slip posi rearend.

 

Nitrous

 

Both routes can be expensive depending on what parts you buy and what you expect from it.

You'll see a better gain from the nitrous though. Bumping up the compression and porting the heads may give you about 60 HP's were the Nitrous will give you as much as you want. Provided the motor can handle it.

 

Another vote for nitrous!

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Mario,
White 94 Z28
Yeah I got a few mods
Video
Black 87 IROC-Z

 

both, but if only one, then def. nitrous. w/10:1 all youneed is premium gas.

 

This guy is the man as you can tell by his vote.

I say a 100 shot and forget about it back the timing down 2-4 degrees and run 92-94 octane. yer all set to go. add headers for an extra punch and a cutout


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Denny Villemure
1989 Camaro IROC-Z Convertible, 305 TPI, 2.73 Gear, Flowmaster 2 chamber. 15.60 on motor, 14.20 on a 75 shot from NX. Woo hoo!
www.denny.cz28.com

 

Nitrous.

Generally, a one point increase in compression equals about 3-5 percent increase in hp. So you are looking at about 1.5 to 2.5 percent increase in hp with just milling.

I am all for motor power but when you are on a budget, nothing beats dollar per hp like n2o.

 

if you have your heads decked you may run the risk of changing your angles and intake may not line up perfect, then you can start blowing out intake gaskets by the runners. not a fun problem to deal with.

N2O of course

 

Alright, it sounds like nitrous is the general consensus. I guess I'll have to start looking around for a kit

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1986 Z28
383 ci Stroker, Dart Sportsmen 2 heads, roller rocker arms, Crower Hot Street Beast cam, edelbrock 750cfm carb and performer rpm intake, Corvette Servos, shift kit and 2600 rpm stall convertor, 3.73 gears and Eaton limited slip posi rearend.

 

IF the right guy does the heads- I say do the heads.

If not- get N20.

Steve

 

You would really do the heads instead? To be honest, I kinda want to keep my car bottle free, but I do want a noticeable increase in power.

 

you are in luck! i have a NX wet kit for sale for $450! let me know...

bkelley89z@cs.com

Brandon

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red 89 IROC 5.7L A4
-K&N air filter, Flowmaster 3" exhaust, Hedman shorty headers and 3" Y-pipe, MAC offroad pipe, Vortec heads, B&M Transgo shift kit

"THINK OUTSIDE THE BOX"

 

Neither. The heads, I assume, are still the old steel ones. The NO2 system has to be filled every 6-7 runs give or take. Why not get a vortec supercharger. That way you will have something when your bottom end chokes. Sooner or later you are going to replace the intakes (very restrictive) and you might as well do it when rebuilding a new engine. Then you can set it anyway you want and turn up the boost.

 

How does the car run as it sits? IS it a pig or does it put down good numbers? I forgot to ask the first time...

As you can see here, some reccomend spending $450 on mods and others reccomend spending 5-10 grand

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Denny Villemure
1989 Camaro IROC-Z Convertible, 305 TPI, 2.73 Gear, Flowmaster 2 chamber. 15.60 on motor, 14.20 on a 75 shot from NX. Woo hoo!
www.denny.cz28.com

 

Theres no real reson to debate this issue if on a budget and looking for the best gain. I dont know if those are aluminum or cast iron heads, but, Increasing compression on those heads if they are cast iron, you will be forced to run high(er) octane gas, if aluminum youd be fine. But the increase in horsepower will be minimal at best.
The nitrous on the other hand, reguardless of what people think, wont damage your motor. If your and idiot and jet it lean then ofcourse your going to have problems, but people dont see it like that.
My motor is a 1970 4 bolt 350, stock steel crank, stock rods and TRW pistons. Nothing major in the lower end. Aluminum heads also.
My nitrous system is jetted for 185hp. Usually I have only the 2nd stage on which is roughly 125 hp. I run that on 1 step colder plugs and 94 octane pump gas. I go through maybe 10 lbs a week and have been spraying the **** out of this motor for 2+ years now. Only thing thats happened is my rear main seal leaks, but that would happen reguardless. Done leakdown and compression tests and people cant believe its still together and shows that little of leakdown.
Car goes mid 12`s on motor and will go 10`s, but my daily setup, being my car is my only car and a daily driver, it "should" go 11.50 or better on nittos.
Nitrous rules