[MaroonNotchback408]

Whats are the pros and cons of each?? Is low compression with boost actually "better" but just more money?

[grnstang]

better. if you have too high of compression and boost your looking at blowing your motor.

[BlessedHellride]

well, alot of boost with high compression will build up to much cylinder pressure and cause the head gaskets to fail hopefully before anything bad happens. Low compression engines cost no more than high compression engines. Power adders can be had fairly cheap these days as well. They are for sale used all over the internet at crazy cheap prices. There a guy on the corral selling a cartech twin turbo kit for 3700 or 3800 I think. That's a hell of a deal for a power adder kit that will support over 1000rwhp. High compression with boost often runs into detonation issues also, must run hot gas in high compression engines. Even an engine with 9.8:1 compression will detonate under 15psi of boost with a 60mm single turbo. That's where you tune will come into play by retarding timing and adding fuel at the right time and the right amount of both.

[1slo5.0]

Originally Posted by MaroonNotchback408 Whats are the pros and cons of each?? Is low compression with boost actually "better" but just more money?

Low static compression is what is needed in a boosted engine because the actual boost will raise the dynamic compression ratio. Dished pistons also give more volume to pack more air in the cylinders.

In a naturally aspirated engine low compression just lessens the efficiency of the engine. Higher compression is generally more efficient and creates more cylinder pressure which makes more horsepower.

[MaroonNotchback408]

Ok so generally a high compression motor ( no boost ) is better then a low compression ( with boost )?

[89LX347]

Originally Posted by MaroonNotchback408 Ok so generally a high compression motor ( no boost ) is better then a low compression ( with boost )?

wellll that comes with with many vairables. yes and no.

[1slo5.0]

Originally Posted by 89LX347 wellll that comes with with many vairables. yes and no.

+1

[88-gt-t-top]

So, does Nitrous have the same effect as say a turbo or blower on a higher compression motor? For instance.... 10.5:1 comp. motor with 125 wet kit has the same odds as blowing a head gasket, piston ring etc, as a turbo or blower set-up @ 8-10PSI? Assumeing all combo's are tuned?

[JBIGBOOTSY]

no, nitrous is fine for high to low compression. Heat and detonation are the general worries of n2o. Id say your odds are less likely with the n2o

[1slo5.0]

Originally Posted by 88-gt-t-top So, does Nitrous have the same effect as say a turbo or blower on a higher compression motor? For instance.... 10.5:1 comp. motor with 125 wet kit has the same odds as blowing a head gasket, piston ring etc, as a turbo or blower set-up @ 8-10PSI? Assumeing all combo's are tuned?

No.

[grnstang]

Originally Posted by 88-gt-t-top So, does Nitrous have the same effect as say a turbo or blower on a higher compression motor? For instance.... 10.5:1 comp. motor with 125 wet kit has the same odds as blowing a head gasket, piston ring etc, as a turbo or blower set-up @ 8-10PSI? Assumeing all combo's are tuned?

is your 331 a 10.5:1 compression motor? If so, (once you get your rear end issues and timing pointer issue figured out) you would be safe with a 125 shot, even more if you had the car tuned for it

[superbean]

It's all in your timing and fuel trim..

People boost 10:1/10.5:1 compression engines (not really HIGH compression, but higher than most turbo setups would like) all the time.

The problem is detonation, so in counter to fix this, the fuel is increased so the cyl walls do not go lean and create a lot of heat, and timing is pulled also in effort to prevent detonation.

But there is a point to where a motor will have so little timing in it, that it wont run like it should. Running as much timing as possible with race gas is the best way to do it, but that's impractical lol

[nolife]

Originally Posted by MaroonNotchback408 Ok so generally a high compression motor ( no boost ) is better then a low compression ( with boost )?

A decent opinion of the difference..
MotorSports Digest

[88-gt-t-top]

Originally Posted by grnstang is your 331 a 10.5:1 compression motor? If so, (once you get your rear end issues and timing pointer issue figured out) you would be safe with a 125 shot, even more if you had the car tuned for it

Yeah it's a 10.5:1 motor, Just wondering for future reference I guess. I might be able to afford a kit and wasn't sure if I should pick it up or not. But now I know, thanks.