gimmemud

I would strongly advise you not to do this, with that much bore on an iron eagle block (I assume) you dont have enough head gasget surface for nos. Why do you have to bump up 2 classes? From what I see of your truck from the pics, looks like a pro street or pro stock at the most. I have Iron eagle block and was advised not to exceed 4.175 bore for nos.

edvancedengines

Beats me what Brook (a salesman at Callies) has to do with this, unless he is the one who told you about the 18.00 -1 compression.

You sorta left out some ital inormation for anyone to figure your static compression ratio. What is the dome or dish cc of your piston? and what is all of this posting in mm of all the dimensions? We are in the US of America.

If your engine builder is making that thing to run and live on pump gas with 18.00 -1 compression he knows far more than I, or anyone else on this forum or for that matter any professional engine builder I know.

It might be interesting to figure your compression if there was information to do it with. You gave everything except for the piston cc. I do refuse to take the time to convert anything from mm though. NHRA Pro Stocks do not have that much compression. Comp eliminator engines don't, and I know of no cup or NASCAR engines that do.

And you are saying that this is on Pump Gas?

Ed

gdmii

Just so you don't think Ed is picking on you, I'll chime in that I agree with him. 18:1 on any pump gas just ain't happening. 11:1 maybe...10:1 to be safe. Even if you did go to alcohol, 16:1 is about the max there. If any engine builder told me I could go to 18:1 on pump gas, I would be running away as fast as I could...if I could stop laughing long enough to run that is.

George

gimmemud

I think what he is calling pump gas, he means racing gas not methynol

edvancedengines

George,
You are right. I am not picking on him. I am an equal opportunity picker. I pick on you or anyone else. I pick on myself more than I do anyone else though. No one is as critical of me and what I do as I am.

Hey, Did you usd to have a MSN GRoups called Pro Street? I think it was. There was a guy there that always had bad to the bone rides named George. Hot Rod Harley was also on there.

Ed

gdmii

Sounds like we had a lot in common but, no, that was another George.

George

kickin472

Geez you guys are ready to pounce like a lion, lol. Anyway Yes I said pump gas meaning no exotic fuels I have stated a couple different times that I use Torco 118 nos which is 120 motor octane. I have the piston paper work here and my bore is 106.30mm (4.185) not 108mm as i thought, The cc chamber is 44. everything else is as stated.. . I would like to know exactly what I have for compression if someone wants to give me there e-mail to see if it is 18:1 (because It costs me $67 for 5 gallons of 118 nos torco and if it is lower compression might be able to use the 115 - 116 torco.) - business or personal e-mail so they can see the all the specs and sorry Ed this je piston sheet has mm all over it thats why i took the extra time to write them both down for the specs.

edvancedengines

ok guy,
I am not dumping on you. I know what is real and what is bogus. I do beleive you feel the info you have been told is real.

I personally know a few of the very best engine builders and very best cylinder head and camshaft guys there is and also ever was. I know for a fact not one of them can make an engine live and run at a 18.00-1 compression.

I persoannly know the guy over the cylinder head development for Hendricks Racing. They build both restrictor plate engines and non- restrictor engines depending on the racing. Even a restrictor plate engine is seldom over 16.00 -1 static compression. Not any NHRA Pro Stock engine builders I know and I know 2 of them who are considered to be among the best, would even attempt to build any engine over 17.00-1 and that is using the VP c-25 125 octane gas. Actually I doubt if any of them are now even 17.00 -1 becuase they discovered no additional power above 16.85 -1 .

I guess that metric junk is just more efforts to kill the JE company like they have been doing since they bought it. Je PPiston company was bought by a huge elevator company to use as a shelter. o'boy.

Still you have never shared with us what the cc of the top of the piston is. I can guess at gasket cc. I can come close to guessing at Chamber cc if I know the head. Piston dome or piston dish cc cam be anything.

What are the cc of the piston? I hope it is a negative number.

Without Piston CC all other talk is useless.

By the way. Whatever it is; That engine in your car in the vid sounds awsum and the car is bad to the bone. Looks like that short wheelbase is killing you though.

MY thoughts are that it is probably a 16.00 -1 or a little higher compression ratio engine which is great on an all motor SB 2.2 head engine with appx a 28 deg total ignition timing. If I am right.

Ed

kickin472

ok talked with Alex from je and gave him the job# and the piston dish volume is -13.65 ccs. Gasket thickness is 040. the heads are 44ccs chambers. I asked him about the nos and how much and he thought 150 - 200 would be no problem. I remember when these pistons were getting made and had been sent to callies for the complete rotating kit, je engineers called callies and had them send the pistons back to them to redo them because they didnt think they were strong enough for the power and compression or made correctly for what we had going on. It took je over 2 months to get them made and to callies to complete the rotating assembly again.

Your right the short wheelbase is killing, we are extending the frame
26"s to keep the front end down and make it more stable hopefully(If you noticed that video you watched I end up rolling over about half track). This is why I want to put nos on it it now because the extending of the frame bumps us up in a buggie nos class and I want to be competative.
And yes we are at 26-28* for timing and at 5000-6000 i use the retarder to back it off 4*S

Going to post a couple pics of the frame getting extended. After we get that done will put a diamond plate bed on it.

Ok now I think I have narrowed it down to 3 kits here.
1- edelbrock performer nitrous system #70001

2- sniper nos kit #07001

3-zex nitrous perimeter plate system. 249-82048

which one would be the best one or would like to hear other nos kits that
might be better.

Thanks,
Anthony

edvancedengines

ok finally,
Now we are getting somewhere and it is looking pretty good.

Bore= 4.185
Stroke = 4.250 (lots of grinding)
Head gasket thickness = .040
Piston deck ht = .005 in the hole.
Appx head gasket diameter = 4.200
Piston cc = -13.65

Real cubic inches = 467.6
Real static compression ratio = 14.91 - 1

Now we are talking horsepower with good living conditions. Took us two days almost to get here but this is the real numbers by the information you supplied.

Please understand that 18-00 -1 compression would blow it's self into pieces not too long after you got it started if you were racing it or running it on a dyno. That is why I had such a hard time believing what to you was simple. I am capable of getting engines to live and run with much higher compression for the circumstances than most builders can and this was blowing my mind.

Can you increase your head gasket thickness and keep same pushrods and rockers etc, by even .010 or .015?

If you can or if you can't, the next info we need from you are as much of the camshaft specs as you have and the rocker arm ratio. For sure I need lobe lifts, lobe separation angles, and duration @ .050

Just as it stands with a retard systen you should be able to spray 200 to 250 shot on it, if your piston and rings will handle it. I will know more when I see the cam specs. The SB 2.2 head is not nitrous friendly but guys do shoot it. The valve angles are too shallow and the chamber is too small. It is still workable though.

The Edlebrock N2o system was designed by Steve Johnson. The only phone number I have for him is personal but you can find him at

www.yellowbullet.com
In a section called Nitrous by Induction Solutions. He does work with Mud Racers.

Ed