ok... having done this a few times we drove straight to the dyno before making ANY real changes. yeah we pulled the cruise off and cleaned the intake and a few other things but no HUGE changes. well it had 1 year old AC plugs (recipt in the car-mileage unknown) and dynoed at 116.2hp/144.6lbft, knowing that NGK have always been better we swap them out with NGK UR5s and guess what.. it redynoed at 124.5hp/153.1lbft and increase of 8.3hp and 8.5lbft!! just with a spark plug change...

i hope the new Brisk spark plugs make just as much difference!

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oh yeah... heres a pic of him all strapped down...

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www.1fst2m6.com

[This message has been edited by 1FST2M6 (edited 03-15-2002).]

and he did a 0-60 run.. 6.49 seconds...

Wow! Really surprised that plugs made that much diff. 0-60 time is GREAT! Wish mine would do that. They only did 0-60 in 8 sec stock according to Motor Trend.....and that was new!

Phil

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GTDude
25 years GM experience

anyplace online to buy those spark plugs? or can my local NAPA or Advanced auto get them?

NAPA NGK UR5, under $2 each; but please wait before you go run ot and get em... We are testing a NEW Plug design in the next week, that promises an even larger increase!

8hp gain- really impressive for the small price invested. For you guys looking for any hp gain, this is great, but what about us old fogeys just driving daily, & once in a while out on the curvy roads. Will this equate to better mpg also? Any gain in reliabilty/life expectancy of the eng or will these little changes actually be harder on the eng?

Impressive...Very Impressive!

6.4's to sixty and some people thought I was lying when i said I got similar #'s on a stock motor.

In anycase I have to ask , did removl of the cruise just shed weight , or is there some secret to that? Also I noted in the pics on your page the MAP sensor is in a different position.

care to shed some light??

Thanks!

JM

the cruise was weight only, the map was moved cause the TB coolant lines were removed and the factory bracket was removed. the vapor canister is just weight too.

as for it being more detremental to the engine... NO if anything it's better for the engine cause crappy plugs cause more carbon build up and poor burn of the fuel that can wash the cylinder walls and cause poor lubrication of the piston/cylinder wall. with properly functioning ignition your ICM will last longer, work less and yeah i don't see why your fuel comsumption wouldn't drop.. your using less rpm to get the same punch... the the added torque will shoot you out in traffic a bit better... and while cruising down the highway your O2 sensor will have a better gas flow not all muckered up with unburnt fuel fighting with it's output to the ECU.

Interesting stuff........
Can you do some pulls with NEW AC plugs to compare them all on level board? Just for curiosity........

we've done that on my GT and the SE.. with only a 1-3hp gain.. i'll look for those graphs... NGK have always shown better dyno numbers on nearly any american and japanese car we've dynoed them in. jeff (2xesses) only put about 7000 miles on those AC plugs... in 7000 miles i'm sure we can re-dyno these NGK and the will be within 1%.

quote Originally posted by 1FST2M6: ...8.3hp and 8.5lbft!! just with a spark plug change...

Yikes!
And hogging out the exhaust manifolds is only good for... what? 4-5?

Not too shabby at all!

Just out of curiosity, have you ever dynoed Splitfires?
I put them in my 1st Formula, and they seemed to help the idle. Didn't do much for performance, though.

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Raydar

From the Department of Redundancy Department.

http://www.miata.net/garage/splitftc.html

no if splitfires come into the shop they are promptly replaced with NGK, bosch-beru(european) the "split" usually welds itself closed within 3k miles and then you just have more surface area for the spark to cover...

Sorry I just want to make sure I'm with you on the new AC plugs. They were 1-3 hp stronger on a NEW plug than one a year or so old or the NGK's were only 1-3 hp higher than new AC's???? Sorry I just want to make sure I know what you are saying.
What about platinum plugs since we always seem to hear bad stuff about them here?
Nice to see real dyno results as opposed to 'seat of the pants' HP claims, hehe

quote Originally posted by 85GToronto: Sorry I just want to make sure I'm with you on the new AC plugs. They were 1-3 hp stronger on a NEW plug than one a year or so old or the NGK's were only 1-3 hp higher than new AC's????

new ACs are at most 3hp over the AC used ones we just tested... the NGKs would be 6-7 over a new AC.

1FST2M6, So the splitfires are a waste of $, what about the Boush Platinum's? Thats what I just put in my more aggressive SE. Thier like $2 each. are the decent. Just wondering while were on the topic of sparkplugs.

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AIM: DR650SE
2 Black 86 SE's V-6 4-SPD

i personally haven't ever tested any platinum plug.. running nitrous i can't use them.. however Ed the dyno tuner says to anyone that asks even dealer reps from bosch, NAPA, etc... "why spend the $ on somthing the car wasn't ever designed for" he doens't put platinum plugs in a car unless it came with them and they aren't running nitrous. (even new cars that were originally equipped with platinum units if they are running nitrous the stock plugs are pulled for a nonplatinum units... it gets hot flakes off and melts to the pistons causing hot spots on the piston and premature faiulre.) sorry kinda went off on a tangent

direct answer - I have no idea...

Hmmm, just hang on ill be back to the forum in 10 minutes...

**grabs coat, keys, and wallet. Drives to parts store, comes home with 6 new plugs**

OKOK ill do just that later but thats damn good for just plugs. Ive got the MSD running bosch platinums, but i think its time for some new plugs

...Travis did you get my email, it wasnt important i just remember you saying you have email problems sometimes...

quote Originally posted by 1FST2M6: ok... having done this a few times we drove straight to the dyno before making ANY real changes. yeah we pulled the cruise off and cleaned the intake and a few other things but no HUGE changes. well it had 1 year old AC plugs (recipt in the car-mileage unknown) and dynoed at 116.2hp/144.6lbft, knowing that NGK have always been better we swap them out with NGK UR5s and guess what.. it redynoed at [b]124.5hp/153.1lbft and increase of 8.3hp and 8.5lbft!! just with a spark plug change... [/B]

Actually, there is old rule of thumb. I don't know where or how I learned it, but here it is:

"Changing from old spark plugs to new spark plugs can be good for a 5% boost in power over the old spark plugs." Now, using this math, we see that the NGK's aren't much outside of that envelope.

I think it is important for EVERYBODY reading this thread to note that these new plugs are not good for "6 to 8 more HP". The plugs that they replaced were *old plugs*. Now, do a dyno on some new AC's or Autolites, and then compare those figures to the NGK's. If there is a difference between the two, the THAT is how much HP those plugs are "good for", not the difference between old and new. Don't expect to put in a new set of NGK's and expect to get 8 HP over a new set of AC's. Ain't gonna happen.

Does NGK make a plug for the 4cyl??

Also, (for the last post) even if the plug is only good for 1-2 HP over a NEW plug, most people, (ok, yea I'm being general) don't have brand new plugs in there car. So, this holding true, any plug would make a difffernce, this just makes more of a difference...

NGK makes a plug for every engine ever built in any country, any year, make model be it on land, sea, air. Well, it feels like it anyhow...

I've got there catalog and used to work at a place that was a dealership for them.

Make sure to check your plugs after a week or so of running them... I used the numbers out of the book once on my (at the time) dead stock 4 cyl, and after a week or 3 they were BRIGHT white. Yup, so hot, they never got a speck of carbon on them. Also, so hot that the thing would knock like crazy!!!