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stroker kit anyone?


whoneedsvtec
05-02-2003, 01:01 PM
i've been doing some research on the crower stoker kit for the B18B1. it sounds like a good choice but i dont know how it will react to being turbo'd. i know i can get the compression ratio at 9:1 like i need it but i still dont know how it will react. will i have increased detonation? leakdown? knock? plus will the longer rods decrease the strength of the rods? with a stroker kit and turbo i know i could probably make a huge amount of power. i just want to know if anyone has done anything similar and had any problems.

Kill4A911
05-02-2003, 09:28 PM
it would increase side thrust and probably hurt reliablity alittle but with the new rods i wouldnt think the longer length would be an issue. it wouldnt rev as well but with a turbo that would be a torque monster of an I4.

911GT2
05-03-2003, 01:44 AM
Be prepared to buy ultra-premium fuel and octane boost if you ever go forced induction.

Kill4A911
05-03-2003, 10:25 AM
whoneedsvtec, just out of curiosity can you get 93 octane in FL or just 91?

Gerbilo
05-03-2003, 07:37 PM
you would really need 93 for that? i figured 89 might cut it, but i don't know too much about what he is doin.

Kill4A911
05-03-2003, 07:46 PM
oh no i wasnt saying he would need it just for the stroking i was just wondering, i know in some places all you can get is 91. but for turbocharging yea definitely premium (i use it any way its worth it for the difference in performance)

911GT2
05-04-2003, 03:36 PM
Dude, higher octane doesn't increase performance. In your engine, it burns too slow, some Hondas actually show a decrease in horsepower with higher octane fuel rather than the reccomended 87/89.

A 2000 Accord V6 actually shows something like a 10 hp decrease with 93 over 89.

Kill4A911
05-04-2003, 07:29 PM
yea if your running low compression N/A, he's talking stroking and turbocharging

911GT2
05-04-2003, 10:45 PM
Yeah and you said you use premium anyways for the performance gains.

There are no performance gains.

SilverY2KCivic
05-05-2003, 12:48 AM
Originally posted by 911GT2
Dude, higher octane doesn't increase performance. In your engine, it burns too slow, some Hondas actually show a decrease in horsepower with higher octane fuel rather than the reccomended 87/89.

A 2000 Accord V6 actually shows something like a 10 hp decrease with 93 over 89.

Interesting, because the Honda Odessey is noted for having a 10hp GAIN in performance when used with 91/93 octain gas, instead of 87. Seeing those use similar engines (the Odessey being based off the Accord) I don't believe that to be true about the Accord V6 having a DECREASE of performance. The 10hp gain was actually something stated in the manual for Odessey's at least back a couple years ago. The difference between 205hp and 215hp there.

You are right that when used in a stock or mostly stock performing car, premium gas doesn't do anything more than waste your $$$ away into exhaust smoke. In a stroked/FI situation you NEED higher octain for the purpose of increased compression in the engine.

Gerbilo
05-05-2003, 02:41 AM
yeah, i never thought it would help unless your car needed it...

in high compression cases with low octane. detonation occurs before the spark lights it up, decreases performance, hey, we aren't runnin diesel here!

whoneedsvtec
05-05-2003, 07:14 AM
the turbo kit actually comes with detonation protection that retards the timing .5 degrees for every pound of boost you're running. so no matter what rpm, or fuel rating you're at it doesn't matter. no detonation.:D

whoneedsvtec
05-05-2003, 10:48 AM
yeah, you can get 93 octane in florida, it just costs a whole sh*t load of money.

911GT2
05-05-2003, 11:57 AM
Originally posted by SilverY2KCivic


Interesting, because the Honda Odessey is noted for having a 10hp GAIN in performance when used with 91/93 octain gas, instead of 87. Seeing those use similar engines (the Odessey being based off the Accord) I don't believe that to be true about the Accord V6 having a DECREASE of performance. The 10hp gain was actually something stated in the manual for Odessey's at least back a couple years ago. The difference between 205hp and 215hp there.

You are right that when used in a stock or mostly stock performing car, premium gas doesn't do anything more than waste your $$$ away into exhaust smoke. In a stroked/FI situation you NEED higher octain for the purpose of increased compression in the engine.

If I remember correctly, the Odyssey reccomends premium while the Accord does not. And the engine isn't based off the Accord either, it's the MDX/Pilot engine that was new in the Odyssey.

911GT2
05-05-2003, 11:58 AM
Originally posted by whoneedsvtec
the turbo kit actually comes with detonation protection that retards the timing .5 degrees for every pound of boost you're running. so no matter what rpm, or fuel rating you're at it doesn't matter. no detonation.:D

Still not foolproof. And you DO realize that retarding the timing will make you lose power, right?

whoneedsvtec
05-05-2003, 01:01 PM
yeah, well if it creates a buffer from my engine blowing up then i'll take that. tuning is a wonderful thing. you can find horsepower in many ways you probably wouldn't think of. so i might lose a couple of horsepower. oh well. in the grand scheme of things it'll be worth it.

SilverY2KCivic
05-05-2003, 01:55 PM
Originally posted by 911GT2


If I remember correctly, the Odyssey reccomends premium while the Accord does not. And the engine isn't based off the Accord either, it's the MDX/Pilot engine that was new in the Odyssey.

That makes sense then since the Odessey engine had more power output from its V6 than the Accord V6 did anyways. The chassis is based off the Accord in it though, that much I know. But when I had heard about the power fluxuation in it, it was well before the Pilot/MDX had even been made. It's the management of the engine allows it to run on regular unleaded if need be, as knock sensors adjust to the decrease of octain unlike in other vehicles, hence the power loss.

911GT2
05-05-2003, 02:34 PM
Originally posted by whoneedsvtec
yeah, well if it creates a buffer from my engine blowing up then i'll take that. tuning is a wonderful thing. you can find horsepower in many ways you probably wouldn't think of. so i might lose a couple of horsepower. oh well. in the grand scheme of things it'll be worth it.

No buffer. All it does is slow the combustion, possibly having some unburnt gas going through your cat.

whoneedsvtec
05-06-2003, 07:15 AM
how in the hell do you SLOW combustion? all it does is make the cylinder fire at a later time. you know...retarding the TIMING.:finger:

911GT2
05-06-2003, 10:46 AM
Originally posted by whoneedsvtec
how in the hell do you SLOW combustion? all it does is make the cylinder fire at a later time. you know...retarding the TIMING.:finger:

Octane is a combustible hydrocarbon. A 100 Octane fuel mix burns the same as 100% octane. A 93 Octane fuel will burn as is 93% of it is octane and the other 7% is other hydrocarbons (heptane??).

Out of all the gasoline mix, octane is the most inert liquid (burns the slowest). That is how you slow combustion.

And to stem any smartass remarks, race fuel is often above 100 (usually around 104 I think). This is because they use a hydrocarbon fuel even more inert than octane, and burns as if 104% of the fuel is octane.

whoneedsvtec
05-06-2003, 12:08 PM
you're still totally off the point. the detonation control retards timing. i'm not even talking about using a different fuel grade. the f-max turbo kit comes with detonation control that retards timing so that the spark doesn't fire prematurely causing an explosion in the combustion chamber before the combustion cycle is complete like its supposed to be. i'm not trying to be a smart ass, but using different gas has nothing to do with what i'm talking about.

911GT2
05-06-2003, 12:16 PM
Originally posted by whoneedsvtec
you're still totally off the point. the detonation control retards timing. i'm not even talking about using a different fuel grade. the f-max turbo kit comes with detonation control that retards timing so that the spark doesn't fire prematurely causing an explosion in the combustion chamber before the combustion cycle is complete like its supposed to be. i'm not trying to be a smart ass, but using different gas has nothing to do with what i'm talking about.

Detonation is caused by compression and heat. While retarding the timing can help, all it does is effectively reduce the CR, which negates the effect of your stroker kit. And the effective CR is reduced further when you add the turbo.

This is one case where keeping the factory/aftermarket timing advance and using 91 or 93 octane (depends which you can get) will really help you put out the power.

whoneedsvtec
05-07-2003, 08:53 AM
retarding the timing makes the cylinder fire at a later time. if you want to reduce the compression ratio you have to change the internals of the engine. i may just be stupid as hell, but somethings you're saying just dont sound right. maybe if you've got a 911 you should stay with it.

911GT2
05-07-2003, 10:27 AM
I said effectively change the CR, of course it doesn't actually change it.

Retarding the timing makes the spark fire AFTER the cylinder reaches TDC, so it fires when the cylinder is on its way down, or when it's displacing less air.

Get my drift?

whoneedsvtec
05-07-2003, 12:07 PM
that sounds better. but it sounded like you were trying to change the CR by changing the ignition timing. i still say that retarding the timing a few degrees to prevent detonation will totally outweigh losing a couple of horsepower when i'm not creating boost. and besides that. f-max uses the MSD boost timing master that only retards timing when at the desired boost level. and it also retards the timing only how much you want it to. so if you feel froggy and you only want to retard it a 1/4 degree for each pound of boost you can. i wouldn't do that personally but you could. if you did that it would almost not be worth even installing the damn thing. so now we're on the same page, but i still dont think it'll cause that much power loss before the turbo spools.

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