I know S.B. engine swap is probably the best way to get some more HP.. Just wondering if anyone here has used the Accurate Power 4.0L stroker kit and what they thought about it. Thanks for any info.. and :flipoff2:

Originally posted by mydixiewrecked
I know S.B. engine swap is probably the best way to get some more HP.. Just wondering if anyone here has used the Accurate Power 4.0L stroker kit and what they thought about it. Thanks for any info.. and :flipoff2:

I haven't heard anyone (like 3 people) complain about the company yet. I just started looking in to the same thing myself. What you may want to do is joing Yahoo! groups and join the group called "strokers". (don't run off PBB ladies, it's all engine tech, nothing to see! :D )

I'm looking at the same for a few reasons.. 1) sneak past emissions (sure I may fail, but I can still get a waiver, stock engine is in there), 2) Everyone does a SB converion, 3) Have more HP and Torque than the average SB, talking 300hp and 350ft/lb.

I've never heard of anyone ever complain about them, but for the price of a stroker I-6 a v-8 looks alot more apealing! and plus you can't beat the sound of a v-8

Originally posted by NE-RokToy
I've never heard of anyone ever complain about them, but for the price of a stroker I-6 a v-8 looks alot more apealing! and plus you can't beat the sound of a v-8
kinda depends on what your starting with, my grocery getter xj, would be a PITA to put a small block in, in wiring allone if nothing else, the tranny and engine are bolth computer controlled, but by diffrent computers that are hooked together. sure I can pick up a vortec 350 or a 5.0ho ford for a grand, but its all the extras that it takes to get the thing running that will kill you. the stroker is something i'm looking into cause it involves buying a kit pullin the motor and taking it to a shop, then putting it back together. to easy.

Originally posted by 0 Brent

kinda depends on what your starting with, my grocery getter xj, would be a PITA to put a small block in, in wiring allone if nothing else, the tranny and engine are bolth computer controlled, but by diffrent computers that are hooked together. sure I can pick up a vortec 350 or a 5.0ho ford for a grand, but its all the extras that it takes to get the thing running that will kill you. the stroker is something i'm looking into cause it involves buying a kit pullin the motor and taking it to a shop, then putting it back together. to easy.

but dont' kid yourself.. be ready to spend upwards of $5,000 between parts from Accurate (around $1700-2000), machine work, new injectors, computer chip? and other parts you discover that may need to be replaced.

so really, in the end are you saving any money?

If you are willing to do some leg work and shop around, you can build a 4.0 stroker for about $600 more then a standard rebuild. That includes using custom pistons and the longer 4.0 rods.

On the first one I built, I used the 258 rods, and off-the-shelf 4.0 pistons without any problems at all. Didn't cost any more than a regular rebuild.

http://www.bc4x4.com/tech/bryce/stroker/stroker.cfm

This is one option.

Jared

Originally posted by twaldher


but dont' kid yourself.. be ready to spend upwards of $5,000 between parts from Accurate (around $1700-2000), machine work, new injectors, computer chip? and other parts you discover that may need to be replaced.

so really, in the end are you saving any money?

How much was it total with machine work and all and how much more power do you thing you got?

Accurate Power isn't the only place that does strokers. HESCO and Clifford Performance do strokers as well but no one ever seems to mention them.

Eventually I was just going to have to get in on this one.
You won't spend $5K unless you are really motivated. After all I have crate motors for less. There is a rundown of reccommended machine shop operations at http://www.accuratepower.com/Jeep/FAQ.html#stroker If you can remove your engine, disassemble it, cart it to the machine shop, re-assemble and re-install it, you can save a bootload of labor. If not, you probably can't swap in a SBC either. Keep in mind that very little of your stock ancillaries are going to bolt on to the SBC. The cost of renewing your belts and hoses etc. is a restoration thing when doing a stroker. They are just plain necessary for a V8 swap. The only thing you MUST do to in order to build a stroker is bore the block for new pistons, the rest is up to you. I bet the frugal Jeeper could finish a stroker for $2K using my kit and injectors.
As far as $'s, just add up the individual costs of all of the stuff in my box and you will see that it is a bargain. Our kits are a fraction of the cost compared to what those other two fellas are asking. And I doubt that they are up at 11:30 doing this either. Enjoy, MIKE
P.S. Forget the chip, strokers run great with the stock computer

Although I haven't purchased products from any, I can say this: Clifford is a good company, they have always been willing to share their knowledge and help a guy out, friendly, etc. Accurate Power has been the same way, if not more-so. And the most affordable. I won't comment on HESCO for fear of liability. But he did say that I could quote him that my "simple stroker" wouldn't work, and then when I told him "that's funny, you better tell it that 'cause it's running right now", he then told me that I had built it wrong with the 258 rods, and that it would be a revver. Well, since it's only more-less a bored out 258 with a better head at that point, have you ever been told a 258 is a revver? Right...

I built my stroker for around the $1kUS mark. I didn't have to rebore since the block was too fresh to bother. That $1kUS included new injectors, balancing, crank machining, new cam, lifters, timing chain, and belt, etc. Try to buy a SBC and install it into a late-model Jeep for that $!

If a guy wants a stroker and his block needs boring, I just recommend that they phone Accurate Power. And no, I haven't got any affiliation with them. :)

--Rob

Originally posted by Weasel
Accurate Power isn't the only place that does strokers. HESCO and Clifford Performance do strokers as well but no one ever seems to mention them.

Yeah, I've talked to Mike too, he knows his sh!t, he runs what he sells and he supports us frugal jeepers. :)
Whish I could build an engine with a welder and a grinder ... :idea:

Originally posted by kutyafal


How much was it total with machine work and all and how much more power do you thing you got?

I haven't done it yet. The figures I flew out there were ball park, figuring you were going to put in a high flow water pump, 3-4 core radiator, rebuild kit, labor for the engine block and head work, larger injectors, new crank, new cam, etc.

I figure if you are going to put all the time, effort and $$ in a project like this, spend the little extra and do it right. Don't cut any corners.

I plan on building a stroker late next year after I get some more important work done.

We did a stroker on my wife's 87 YJ. We took a stock 4.0 bought some pistons, a mopar stage two cam, and a 258 crank. I bought all the parts and let a buddy who knew what the hell he was doing, do it. We kept the compression stock, and kept the same injectors and other peripheral components. The biggest waste of money were the rockit tube and the bored out throttle body. The engine dynoed at 227 hp and 305 lbs of torque, before and after we installed the rockit air tube and the bored out throttle body. It runs on pump gas (91 octane) with no pinging. I have a 5.7 TPI on my CJ7, on the trail her YJ has a wider torque curve than the 5.7. The 5.7 does have a better sound to it, but the 4.8L feels better when crawling .:D

Originally posted by scramblin
We did a stroker on my wife's 87 YJ. We took a stock 4.0 bought some pistons, a mopar stage two cam, and a 258 crank. I bought all the parts and let a buddy who knew what the hell he was doing, do it. We kept the compression stock, and kept the same injectors and other peripheral components. The biggest waste of money were the rockit tube and the bored out throttle body. The engine dynoed at 227 hp and 305 lbs of torque, before and after we installed the rockit air tube and the bored out throttle body. It runs on pump gas (91 octane) with no pinging. I have a 5.7 TPI on my CJ7, on the trail her YJ has a wider torque curve than the 5.7. The 5.7 does have a better sound to it, but the 4.8L feels better when crawling .:D

Don't keep us in the dark now! :) A little more detail please. What pistons, from where, how much? How much for the other part? What did your buddy do exactly? What else? How does it compare to the commertial stroker kit in performance and in parts?

anyone dyno a stock 4.0L or 4.0L HO? Was wondering what that was for comparison.

Don't keep us in the dark now! A little more detail please. What pistons, from where, how much? How much for the other part? What did your buddy do exactly? What else? How does it compare to the commertial stroker kit in performance and in parts?

Originaly we took out the 258 and installed a regular 93 4.0L. It was a big improvement from the 258 but not enough to turn 38.5" swampers. That is when my buddy suggested the stroker, him and another guy put it all together. My initial fear was pinging since you can't manualy time those motors. By the way the 4.0L dynoed at 182 hp and I think it was like 210 lbs of torque (we did all this stuff about 2+ years ago :rolleyes: ). As far as pistons and all the parts, we got them from the mopar performance catalog. We have moved since the modification, I don't know the part numbers off the top of my head. I will try to find the receipts in the next week or so, so I can list the parts. I think we spent about $1200 and still runs clean enough to pass California smog.:flipoff2: My main objective was to keep the Jeep all mopar if I could, it was probably a lot more work than just getting a kit but I guess it was worth it, we haven't had any problems and it kicks ass.

More info please. I would love to bump the HP in my YJ. You're right the 4.0 needs a little help pushing the 38.5 sx's. almost a 40hp gain is worth a little work. The torque #'s look awesome too. Why go V8 when you can have a pissed off straight six?

OK OK they do sound good. But I like not carrying jerry cans and still having a stock fuel tank.

A customer recently did a before and after wheel dyno test on his '99WJ. He used a stroker kit, big valve head and injectors. Before: 160 Ft Lb, After: 292 Ft Lb. Picked up 132 Ft Lb !!! Heee Heee. MIKE

Originally posted by Mike@Accurate
A customer recently did a before and after wheel dyno test on his '99WJ. He used a stroker kit, big valve head and injectors. Before: 160 Ft Lb, After: 292 Ft Lb. Picked up 132 Ft Lb !!! Heee Heee. MIKE

You got any graphs you can post of where the power is at what RPMs?

I take it that was a 4.7L when all was said and done?

The engine was a 4.6L (.030" Over) He faxed me a chart, I'll try to find it and put it up. 4.0 based engines have more of a torque "table top" than a curve. Most of that 292# was in at LOW rpm. MIKE

Originally posted by twaldher


You got any graphs you can post of where the power is at what RPMs?

I take it that was a 4.7L when all was said and done?

When you look at a stock 4.0 torque curve it looks almost unbelievably flat. Most of it is in by 1500 RPM - around 185 lbs - and tops out at ~3600 at 210 lbs. Imagine the whole thing pushed up by ~100 lbs and you'll swap your stroker for your girlfriend... :D

Here is a graph of someone's stroker:
http://www.jeep4.0performance.4mg.com/photo3.html

damn it, so your telling me I have to find a girlfriend somewhere before I can build the stroker? :flipoff2: