Built H22: How much nitrous.. experts take a look - Honda Prelude Forum

Turbo Lude SH · 11-10-2002, 01:50 PM

Below is my current setup, I've got AEM EMS and am learning it slowly on my friends GSR and I've got a very good tuner and the engine will be tuned like crazy. I will also be running 110+ octane all the time.

I'm wondering, with perfect tuning and being pretty safe with it, like using the nitrous like maybe twice a week, how much this engine can handle?

Dont think about the clutch, axels, etc. Just the engine itself.

H22a1 block
iron sleeves
90mm Endyn/Wiseco rollerwave pistons thermal and anti-friction coated
9:6:1 compression
Pauter Chromoly Steel Rods
Knifed-Crank
90mm head gasket (stock thickness)
all new oem honda bearings
aluminum crank pulley
lightened flywheel 13.5lbs
ACT Xtreme Pressure Plate w/ 6 puck ACT Disc
Brand new water pump
Prodrive Oil pump with Balance shaft removed
Everything completely balanced

Head:
Full Portflow Unit - P&P and everything they do.
Combustion Chambers extended to 90mm
All Ferrea valves 1mm oversize
Dual valve springs and ti retainers.
Crower Custom Stage 3 cams with Skunk2 cam gears.

Also will be running (dont have yet, but soon):
TWM Individual throttle bodies
SMSP Header
MSD 7AL with launch control

And of course, the AEM EMS which I already have. Also I've done a OBD-1 conversion if anyone was wondering.

Will be runing NOS Direct Port kit.

I'm thinking of starting at 175 shot... am I crazy or can it handle a lot more?

Thanks in advance.

laughin2.2 · 11-10-2002, 02:14 PM

Are you using stronger head bolts, such as ARP, or the stockers? Also are you using a copperhead gasket, and did you O-Ring the block? The individual components of the motor can hold a 175 shot, but I'd be surprised if it would hold with a metal head gasket and stock bolts. You have to be sure that the head will stay attached to the block.
Also, will you be running slicks or do you have some other way of getting a 175 shot to the ground?

Turbo Lude SH · 11-10-2002, 02:25 PM

Quote:

Originally posted by laughin2.2
Are you using stronger head bolts, such as ARP, or the stockers? Also are you using a copperhead gasket, and did you O-Ring the block? The individual components of the motor can hold a 175 shot, but I'd be surprised if it would hold with a metal head gasket and stock bolts. You have to be sure that the head will stay attached to the block.
Also, will you be running slicks or do you have some other way of getting a 175 shot to the ground?

I've been trying to get my hands on a ARP Head Stud kit. But have had no luck, but I will have them before I complete the engine. I used the stock head bolts to clay the engine only.

I'm not going to be using a copper head gasket and the block is not o-ringed. I guess both of these can be changed, but it will cost me some cash.

I will be borrowing some slicks from a friend who has a low 12 second ITR and I hope they will fit. If not, I will be buying my own set sooner than I had hoped.

Here are a few pics of the block:

So would you say that 175 shot is as high as I could go?

laughin2.2 · 11-10-2002, 02:33 PM

Quote:

Originally posted by Turbo Lude SH

So would you say that 175 shot is as high as I could go?

No, but the only way to find out is to raise the shot until you pop the motor. Do you have any idea how much power the motor can hold?

CanadaPreludeSE · 11-10-2002, 03:36 PM

I wouldn't run a 175 shot off the bat, start at 100 and work your way up.

Make sure it's tuned correctly or BOOM!!!

Turbo Lude SH · 11-10-2002, 04:03 PM

Well I asked Golden Eagle how much they thought a simularly prepped motor by them could handle. Since I put mine together myself and didn't really have a builded except for the shop who did my sleeves and balancing and then Portflow for my head. And they said the bottom end could probably hold up to 500+ horsepower if assembled correctly and tuned well.

Portflow said the valves will handle as much as you can throw at them if it's tuned decently.

I'm anticipating 225whp off the bottle. Maybe less. I dont know about squeezing 275 shot.

So I really don't know how much it can handle. I suppose I will just have to see.

I'm going to start with 100 shot and tune for it. Probably leave it there for a while. Do some runs at the track and see what I can do. But I am just wondering where my nitrous ceiling is.

I work on my car constantly and since I'm a dirt bike rider I am used to rebuilding my engines every 6 months and I do the same with my car engines(call me crazy all ya want). So I think I will give it 6 months at 150-175 shot and then when I am ready to rebuild it. Start bumping that bad boy up and see what she can handle.

Or maybe just do some guess-tuning and run 300 shot at the track and see what happens.

Omega3001x · 12-01-2002, 08:17 AM

where do you get the money to rebuild your engine every 6 months?!

jnkoh · 12-02-2002, 05:36 AM

You probably alread have this, but if you are going into the 150 to 175 shot area, get a high flow fuel pump. You should easily be able to do a 125 shot. The mechanic I go to has a friend that ran a 125 shot on stock internals with just a FPR, walboro, and clutch, single fogger dry with no problems for 2 years. I think you can probably start a 150. Your car sounds similar to Frankie Eagle's car, it was in Honda Tuning. He ran a 150 shot and hit a 12.6.

19924ws · 12-03-2002, 08:43 PM

Check out this months Honda tuning, that lude has a 200 shot!

laughin2.2 · 12-03-2002, 09:01 PM

Quote:

Originally posted by 19924ws
Check out this months Honda tuning, that lude has a 200 shot!

Haha, what nitrous controls?

LudedudeSi · 12-04-2002, 02:20 PM

man a 200 shot is hardcore. people use to talk about a stock block not being able to handle a 100 shot but now from everything people say its very capable with out a rebuild.

UEnvyMyStyle · 12-05-2002, 12:43 AM

110+ gas all the time.. wow $$$
this isnt your daily driver right

MJShelgosh · 12-05-2002, 04:33 AM

Good luck.. I think it is possile.. Venom has a 4 cylinder VTEC I took a look at that has like 90 hp.. and I am sure thy run a large shot of Nitrous.. I think they have the H22 but I can not be positive.. in any evnt.. I know thy throw parts at it like mad at the races and its built for drag.. but it is a built up motor that is still an H22. So I am sue you'l have no problem.. with proper tuning like you said..

If you dont mind my asking.. where abouts would you go about ptting a 300 shot kit for your car?? NOS ?? DP setup..... and once you get into those higher shots.. isnt there a few moe things you need to run it... like.. a 300 shot would last how long a 10 lb bottle.. 3 seconds?? I take it upgradin the bottle is one.. but what about al the other things.?? Just curious...

laughin2.2 · 12-05-2002, 08:00 AM

Quote:

Originally posted by MJShelgosh
I take it upgradin the bottle is one.. but what about al the other things.?? Just curious...

Solenoids for sure. Also the solenoid extension tubes would need to be upgraded.

apocalypse · 12-11-2002, 03:09 PM

with a 300 shot wouldnt u need some big ass slicks? so u can get traction once that power hits and not nail the wall?

laughin2.2 · 12-11-2002, 05:05 PM

Quote:

Originally posted by apocalypse
with a 300 shot wouldnt u need some big ass slicks? so u can get traction once that power hits and not nail the wall?

Yes, slicks would be very necessary.

nuro · 12-12-2002, 08:17 AM

this is a lot like my build also...

Ritteri · 12-26-2002, 07:27 PM

Quote:

I used the stock head bolts to clay the engine only.

Turbo: You mention you are going to "clay" the motor. Are you worried about the oversized valves???

The reason I am asking is because I am running Skunk2 Stage 2 camshafts which have a .505 intake lift. WIth the stock compression and stock pistons they clear just fine. But for higher compression or aftermarket pistons I am going to have to clay my motor to see if clearances are going to be an issue or not. I cannot use oversied valves either, nor did I plan to, but I may use JDM 11:1 pistons with crower rods for my application as the camshaft is made to run to almost 9000rpm for its power band. And will probably have to clay the engine for clearances. Maybe you can give me some precedure tips on how to go about this process?? You happen to have an idea as the the clearance needed between the valves and the piston indents? Help here would be great...

vir2L · 12-28-2002, 08:09 PM

Quote:

Originally posted by Turbo Lude SH

I'm anticipating 225whp off the bottle. Maybe less. I dont know about squeezing 275 shot.

225 whp NA is a generous guess IMO.