highest shot on h22? tuning in todays world.

[Turbo Dave]

I know a 75 shot on an h22 even without a tune can be accomplished safely. i was just wondering what you think is hte highest possible shot on an h22 with a tune.

I have

jdm h22a converted to external coil,
msd blaster, (getting the rest)
colder spark plugs
a chipped p28, will be tuned by someone brilliant lol

Do you think this is possible? or is it just to much for the compression ratio? what am i going to be worried about going first? My h still has full compression in cylinders and runs good.

[shanleycb7]

usally they say that u can do up to half the hp of ur engine with a good tune. Ive heard of up to 100hp wet shot-on stock h22'z

[TypeG]

a friend of mine had a 100 shot on his and a tune. he beat the crap out of a lot of cars. he thought he blew the motor once, but it turned out that he fouled a plug. later.

[areem57]

Wow a 100 shot is crazy, just think thats 300 horse, thats good for 13's maybe 12's if you know how to use it.

[shanleycb7]

h22 with h22 tranny and 100 wet shot= mid to low 12'z for show

[trah]

i use a 75 shot but i can't break into 12's still in the low 13's with the bottle.

[areem57]

i use a 75 shot but i can't break into 12's still in the low 13's with the bottle.

Dry shot? Try taking out your back seats, spare tire, and put 93 in it.

[KillerCam282]

Dry shot? Try taking out your back seats, spare tire, and put 93 in it.

You must not have an H22. If you did, you would know that it runs on premium fuel already.

Also, the rule for selecting a safe shot for a stock motor is to take half the stock HP as your jet. That would make it 100hp.

Personally, I would not do 100hp jet on the H22 because cast pistons don't have incredibly high tolerances. And AFAIK, they say your average shot of 75 puts about 10k miles worth of damage on your engine.

[Turbo Dave]

You must not have an H22. If you did, you would know that it runs on premium fuel already.

Also, the rule for selecting a safe shot for a stock motor is to take half the stock HP as your jet. That would make it 100hp.

Personally, I would not do 100hp jet on the H22 because cast pistons don't have incredibly high tolerances. And AFAIK, they say your average shot of 75 puts about 10k miles worth of damage on your engine.

killercam you didnt get rid of your cb7 did u?

and 10k miles, that sound alot. I think mahle makes pistons that you dont have to sleeve the block for turboing, i guess this would be good if i wanted to run an even higher shot then... say 150? (obviously my goal)

im trying to run 12.60's or better.

[KillerCam282]

killercam you didnt get rid of your cb7 did u?

and 10k miles, that sound alot. I think mahle makes pistons that you dont have to sleeve the block for turboing, i guess this would be good if i wanted to run an even higher shot then... say 150? (obviously my goal)

im trying to run 12.60's or better.

Its pretty much gone to a fellow member. I know he will take good care of it, besides, i can help him build it up anyhow.

The Mahle pistons have Nikasil coatings on the piston skirts to prevent them from grinding the hell out of the FRM sleeves. Now, if you got pistons and sent them out to be coated with Nikasil all around, they will also be well protected against the nitrous meltdown temps.

Personally, i would sleeve the block vs running the FRM sleeves. No real reason for it but I am just biased against the FRM sleeves. I have seen turbo H23/22's with the FRM sleeves put out great numbers but I'm old school. So I sleep safer at night knowing that my Ductile Iron or Steel sleeves are holding up to the challenge. Also, over time Nikasil coatings wear down (as anyone would/should expect). However, the coating is only as good as the process used to coat it. Keep that in mind with the also old school rule of thumb I gave you regarding N2O's damage to block internals.

For 12s, you would need some kind of engine work itself. Solicit companies that specialize in building nitrous engines. Contrary to popular belief, a nitrous build isn't just a N/A build with "NOS". Some shops actually have calculatd port angles and diameters that they would apply to a head that they are prepping for nitrous (I saw this with Mustang heads, so there must be somthing for VTAKs).

[trah]

use the nos calculator to determine and tune the AFR (you need a wideband) right now when i spray and pray i run 16.7 rich but not lean its kinda hard to tune nos to a good afr since i don't have spare n2o lol. but when not spraying im either in the 13-14 afr range but it does go lean from different rpms sigh....even street tuning it won't give you all the accurate results as a dyno would but o wells. have fun with the gas.

[1993sE]

what about the h23? better for some laughing gas? than the h22?

[KillerCam282]

what about the h23? better for some laughing gas? than the h22?

Nope, actually the H22 is. Simply because it starts off with more hp. With the H23 you might end up running a 75 as well.

[1993sE]

thought cause it had a lower comp ratio it would be better

[KillerCam282]

thought cause it had a lower comp ratio it would be better

Thats what i figured you thought.

While lower compression ultimately means lower operating temps, the cast pistons will do you in far before any of that comes into play.

Nitrous is far more versitile than boost tho. I have seen some Mustang owners running a 12:1 CR with a dual phase system and of course race gas.