darknezz

You want use to explain in a forum why you get detonation using lower octane on higher compression engine...

:\

My list is the pretty basics for a stroker plus the 24lb injectos adj fpr and adj map sensor mod.

You still have not stated your budget which is the first thing to decide on a build.

Bucaslaker

2000 range

Bucaslaker

That's my budget

s346k

op: you have a lot of research to do. my suggestion: leave the engine alone until you know what you want and how to get it.

Fred/N0AZZ

Could not have said it better.......You also need to check with an engine machine shop as for what those services will run you. When you do a rebuild of any kind there are some new parts that most people replace like new starter, flex plate, water pump, etc. not including the parts for the stroker.


There are skills required for a "successful" engine rebuild along with specialized tools. I don't want to insult you but this is NOT a first time project by any means and it seems like you have no knowledge about it, not a good start my friend.

extrashaky

The simplistic answer:

Compressing a gas makes it hotter and less stable (the opposite of releasing a gas, like how a can of compressed air gets cold when you use it). The extra heat and pressure can cause the cylinder to fire at the wrong time. At best it robs you of power. At worst it damages the motor.

The octane rating is essentially a measure of the fuel's resistance to burning. The higher the octane rating, the more stable it is at a higher temperature and pressure. So if you raise the compression in the cylinder, you also want to raise the octane rating of the fuel you're using to avoid having the fuel burn at the wrong time.

You only need the octane rating to be high enough to burn at the right time and avoid burning at the wrong time. That's why running 93 in a minivan doesn't get you any advantage, but running 87 in a stroker will make it knock like a sum*****.

ETA: If you're asking these questions, you may be in over your head at your budget level. There's no shame in that, but what it does is creates a catch-22 situation that makes it very difficult to get started. What I would suggest is that you buy a pre-assembled stroker kit instead of trying to piece together everything yourself. Build the engine with a full kit to learn what you're doing. Then try to do your custom stroker on the next build. And a 5.0 is pretty extreme. I would start with a 4.6 or 4.7.

s346k

i can see a thorough stock rebuild easily running $2k. I doubt you'd even be able to get a stroked short block installed with all of your stock parts back on it for that kind of money. I've been around engines my entire life and I would still research the hell out of a 4.0 stroker motor. id be more concerned with engine management than anything else. which reminds me; I need to see if hpt has made any advances on jct stuff lately.

Bucaslaker

Yeah guys sorry I'm not super knowledgeable about this stuff. I'm not looking to do this like next week. This is my research. I'm trying to learn as much as I can before I start to work on it. I've still got a lot of other things to fix before I dive into the stroker world and I know it's not a first time type of build but something has to be. I'd appreciate advice and help on building my stroker not advice to not build my stroker. I'm just trying to learn guys. I'm in jeep school right now. Still a newbie.

KaMoore

My first engine build was 51 years ago at the tender age of 16. If my dad hadn't been a mechanic my first engine would never have run. There are too many things that can go wrong building a stock engine to try to build a stroker as your first engine. My suggestion is to build a stock engine first and LEARN the basics.

andrewmp6

Google and read you can find a ton of info on anything online.

Fred/N0AZZ

My first rebuild with my buddy was at 14, 54 yrs. ago on a flat head Ford engine I bought. I used old and some new parts took me over 2 months........it never ran BTW.

extrashaky

But then he has another stock motor. Why build another stock motor if you already have a stock motor that runs?

Couldn't he get the same experience from just using a stroker kit with all the parts pre-selected? That would give him the paint-by-numbers experience of a stock build to get the basics, while providing a more interesting end result. Maybe it won't give him the ridiculous power monster he might ultimately want, but it's a good compromise stepping stone to a more powerful build next time.

Those kits seem to go from $1500 to $2500, depending on what's included. Titan's full kit with a block, head, rotating assembly and cam is $2500. Of course that's going to end up really being about $3K once the shipping is tacked on. But if he shops around, he might actually be able to come in on budget, learn the basics and still be able to have some fun with the final result.

Bucaslaker

Thanks for actually trying to help rather than tell me not to do what I'm trying to figure out how to do.

KaMoore

He could have 6 motors laying around and I would still say build a stock engine first. A mistake building a stock engine is less apt to tear anything else up if it heaves it's lunch. It is less expensive to throw away a bad stock engine than it is a stroker. Of course when I built my first engine Ibought all the parts and gasket set for less than $100.00

KaMoore

Since you say you are trying to figure it out, that leads me to believe you have never built an engine. Did you take algebra before you learned to add, subtract, multiply, & divide? Making a mistake on a $400.00 rebuild kit(Rock Auto) is a lot less costly than making a mistake on a $2500.00 engine.