my question is can a 12.8.1 cr engine run on 93 pump or whould i need race fuel?

 

what cams and setup are are you running? Tuning software etc? plenty of things need to be considered before being able to answer that question

 

As said, more needs to be known, but in general, you could run it, but it won't be at optimum power. Use e85 or race gas, or you might as well have done an 11.5:1 build IMO.

 

your fine...
i'm on 13.0cr on pump gas.

 

you would need to tune your car on stock advance you will probably have detonation

 

Like everybody says we need more knowledge of your build . Like all motor i can be done. If i asked my tuner he would say i can tune up to 13.1 but that doesnt mean you will get the best performance out of your motor sometimes you can lower the compression so that you can advance the timing without detnating and make more power . When it comes to compression bigger isnt always better . I cut my pistons down to 12.3 because all i run is pump gas and i wanted to get as much as i could on pump gas .

 

ok my motor stats

Stroked B18c1 longblock
12.5 compression cp pistons and wrist pins
Eagle H-beam rods
Knife edged n balanced crank
Skunk 2 dual valve springs
Skunk 2 retainers
(Skunk 2 flat valves bumped overall compression to 12.8)
Skunk 2 stage 2 all motor cams
Rc 310 cc injectors
Aem fuel pressure regulator
Skunk 2 intake manifold
ARP rod bolts and ARP head studs


not sure on what tuner im going to use maybe neptune or crome
what power out put do you think ill make?

 

do it and report back

 

will do

 

is it dumb to tune on 93 and run 110 or c16 at the track? we dont have e85 around here

 

It's not dumb but you def. won't be making the power you could be and essentially wasting your money on the race gas until you get a tune for it...

 

I'm close to that and tuned on 91. Not ideal but possible

 

maybe run a meth kit...tune the car on 91 octane and then run a switch too switch the map too an agressively tunned meth sprayed map....turbo cars gain hug numbers doing this....im sure maybe a little power could be found on a n/a car as well....probally something small but a little 3 gallon meth cell wont cost much too refill.....any you can still drive around town all you want on the 91octane tunned map flooring it even

 

set it up for start spraying when? and how can i change maps? what tunning software allows you to do that? good idea if it works

 

whats your stats on your motor / out put?

 

think i can get 260whp with a 255 walbro? on pump?

 

dont flame me but i heard you can mix 93 pump with a gallon of 5:1 ratio of pump gas to toluene is this ok to do?

 

84.5mm RS Machine ITR Slugs
ITR Crank
JG P&P Head
Jun III Cams
Edelbrock Victor X manifold
JG Edelbrock header w/ 2.5" mod
3" intake w/ VS
68mm Professional Products TB
RC 440cc injectors
Walbro 255 pump

Head has been milled and block has been decked. Don't remember the specifics but I was told that compression was well into the 12s

Made 240whp 165tq on a shitty hot day on a dynapack at Erick's racing. Runs great. I drive it daily to work and school.

 

91 pump? whats your block a b18?

 

Yes sir, tuned on 91 octane (Chevron w/ Techron! Yeeaah)

Lol, it is a B20 block, stock sleeves.

 

sounds real nice man! mines a gsr incase you didnt know lol b18c1 swapped civic ex shell gsr trans ( with grinds )

 

should i run a step colder plug or is that a bad idea?

 

Are those 12.5:1 pistons for a stock B18? If you are stroked the compression will be even higher... The stage2's are moderately aggressive though, so they will bleed off some of that compression for you. You could always increase your overlap to help as well.

 

my buddy had close to the same setup. he drove it for 5000 miles on 93 pump without tune and the car ran fine daily

 

hondata can use a switch to change maps,,,just start spray meth *** soon as you floor the gass,,,and have it tunned for it