mtnman82

I was checking out some of the neon videos in the other link. If I read it correctly, one mentioned the neon running 25 psi on 93 octane. Is this possible, or more likely BS? If they are doing this, what's the factor(s) that let them crank up the boost on lower octane than our cars? I assume this would be of interest to any of us in 'octane starved' states, or where unleaded race gas is not readily available. Just wondering out loud .....

Fen

Probably better head design reducing hot spots and EGT.

Ski

and complete engines are only $500 or less used...how many spares could you afford at that price ?

daniel951

there is a guy down here in colorado that is running 30psi on pump gas on his dsm but a lot of stuff is done to it

Laust Pedersen

Or a port water injection cooling shower combined with slightly less timing as I have with the occasional 23 psi boost on 87 octane gasoline.

Laust

Glider

The engines may have lower compression than ours. I read many threads on other boards debating lower compression/high boost vs. High(oem)compression/lower boost.

MPD47

Because you can get a piston/rod/rings all assembled for $54.50 each. The parts are stupid cheap, a friend of mine got two neon's for FREE last year, we're going to build a stripped out sunday drag car out of one of them. Total investment is going to be just under $100.

toddk911

Yea, a lot of those videos they are glory runs and some even show them blowing, but , as Laust mentioned, with proper tuning and cooling you can run a lot of boost safely.

And as stated eliminating hot spots is a major help.

porshhhh951

Yeah chris runs 23psi on pump fuel. He does all his own tuning and no he doesnt have water injection.

Porschefile

Much more efficient heads and combustion chambers. On top of that, their much more modern engine management allows for fine tuning things more precisely. For an example, Evo's run a spiked 19psi stock (spikes to 19psi on the low-end, tapers off to 14psi on the top-end). Lots of people add boost controllers and run 20-23psi on pump with these cars (my friend runs 23psi on pump with his evo).

toddk911

Yea, as said tons of times in tons of threads; there are tremendous possibilities with proper tuning.

I don't think, in a street car, I have EVER seen or heard of a motor blowing from pressure.

Knock blows motors. Heat causes knock. Pressure, yes, causes heat, but if you can keep the combusiton chamber from pre det. then you are hard pressed to blow the motor.

HEAT BLOWS MOTORS.

jimbo1111

These cars have much better knock detection and the ability to retard timing precisely. Just because they run more boost doesn't mean that there is more power on pump. If I recall there was an evo running stock boost on california 91 octane that never produced factory HP numbers on a dyno. Once 93 was introduced power was restored.

Rogue_Ant

So the KLR is holding our motors back? What about upgrading to a more modern knock detection/reaction system?


Rogue

Raceboy

Of course it's the OEM engine management what holds down. Properly tuned stand-alone will make the engine haul and lets you set mixture suitable for cruising and at the same time get some decent fuel mileage.

Rogue_Ant

How about replacing the KLR w/ a J&S unit? I know its been talked about (briefly), but has anyone done it or have any useful information on it?


Rogue