4.6 stroker in a Full Size Jeep

Newbies, and basic Stroker Recipes... Get started with your first stroker here!!
Dezertxj88
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Re: taking the plunge, poor man's?

Post by Dezertxj88 »

Cheromaniac wrote:Since you're using a '91 block, you can use a stock '91-'98 cam. A stock cam from '99+ won't bolt into the block.
Dino I actually posted in another thread, the cam split is 87-95, 96-98 and then 99+.
The 87-95 is the single pattern 96-98 being the dual pattern & 99+ cam being dual pattern but slightly different specs & different mounting for the timing set. The 96-98 specs are posted on your tech specs page on jeep4.0performance and the 99+ are posted in the calculator on the website here. They are very similar, only slightly variations.

Hey Zorm idk if you have checked or not, but instead of using the old lifters and cam, why not grab a Comp 68-200-4 from summitracing. Cost is about 190 bucks for the cam and lifters, and it can be run on stock valve springs. The comp 201 isn't recommended for stock valve springs as the lift is more than .430" @ .050", but I've been running it for 102K without issue.
I litteraly just posted this, but the 96-98 dual pattern cam vs the comp 200 is virtually the same. The comp 200 offers more low end and mid range & the same up top. Seems like a good idea to help pull around that extra weight :cheers:
The comp 201 is about the same, better low end and mid range than the stock cam, but also more up top.

Also reading now you have the 87-95 style cam which is a single pattern, and doesn't offer much low end at all. The cam kind of wakes up around 3200+. Deffinetly switch to a dual pattern, you'll love the punch you get from it.
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Re: taking the plunge, poor man's?

Post by Landon »

Zorm, I'm thinking about a stroker for my tired 79 J10, so will follow your experience as closely as you will post.
I hope your shoulder surgery went ok.

From what I've read in the FAQ, your success with cam X will closely follow decisions about static compression ratio and quench and dishing the pistons and shaving the block/head. The FAQ is very helpful with this. Have you talked specifics with the engine builder on this?

What final gear ratio and tire size did you run with the 4.2/4.0 head combination? I've inherited 3.54 with 31x10.5s and the 258 can barely spin them. What altitude will you be driving through?

- Landon
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Re: taking the plunge, poor man's?

Post by Cheromaniac »

Dezertxj88 wrote:Also reading now you have the 87-95 style cam which is a single pattern, and doesn't offer much low end at all. The cam kind of wakes up around 3200+.
I'm using my original '92 cam in my stroker and I can tell you it has a shedload of low rev torque. At 1500rpm my stroker's already making 89% of maximum torque and by 2500rpm, it's making 95% of maximum torque. That means I can drive quickly from point to point and get good gas mileage just by keeping the engine between 1500-2500rpm.
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Re: taking the plunge, poor man's?

Post by Dezertxj88 »

Cheromaniac wrote:
Dezertxj88 wrote:Also reading now you have the 87-95 style cam which is a single pattern, and doesn't offer much low end at all. The cam kind of wakes up around 3200+.
I'm using my original '92 cam in my stroker and I can tell you it has a shedload of low rev torque. At 1500rpm my stroker's already making 89% of maximum torque and by 2500rpm, it's making 95% of maximum torque. That means I can drive quickly from point to point and get good gas mileage just by keeping the engine between 1500-2500rpm.
While I don't deny the fact that your stroker has the torque down low. The 87-95 cam compared to the 96-97 dual pattern isn't even fair and of course if your going to shell 100 bucks or so out for the OEM cam, you may as well upgrade to a slightly better one for about the same price.. The 96-98 has more, except up top 4300-ish rpm-5200rpm! The 87-95 cam doesn't have the torque down low like the later models, and really does wake up around 3000 rpm..Alot of people say their jeeps wake up around 3000rpm..all those are the 95 or ealier guys. When in a stroker it may pull the power on sooner but in a stock app. it isn't there.

Obviously the 87-95 cam isn't a dual pattern but can't we install the 87-95 cam more advanced to try and have it come on sooner? It does have more lift than the 96-98..
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Re: taking the plunge, poor man's?

Post by Zorm »

i found SK68-200-4 at http://www.buyracingparts.com/camshafts ... 0-4--.html for $215.00 wating on an email for total price shipped to me. Another thought, I should not get the cam till I know all the numbers from the machine shop right, so I need to get my pistons first.
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Re: taking the plunge, poor man's?

Post by Cheromaniac »

Dezertxj88 wrote:The 87-95 cam compared to the 96-97 dual pattern isn't even fair and of course if your going to shell 100 bucks or so out for the OEM cam, you may as well upgrade to a slightly better one for about the same price..
I certainly wouldn't advise anyone to swap their existing OEM cam for a different vintage OEM cam. My philosophy is to either reuse your existing OEM cam in a poor man's stroker or upgrade to an aftermarket cam.
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Re: taking the plunge, poor man's?

Post by Retlaw01XJ »

Zorm wrote:i found SK68-200-4 at http://www.buyracingparts.com/camshafts ... 0-4--.html for $215.00 wating on an email for total price shipped to me. Another thought, I should not get the cam till I know all the numbers from the machine shop right, so I need to get my pistons first.
Wow, roller lifters and a double roller chain too... what a deal! :worship:
I'm gonna go way out on a limb and say the pictures aren't accurate.... :P
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Re: taking the plunge, poor man's?

Post by Zorm »

just got the responce, they do not charge a handling fee, just shipping and the price :D so about $230 to my door. I also don't think that pic is the set, just a stock picture. Still, the price shipped to me is about what the price is just for the set without shipping and handling at most other places I have found.
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Re: taking the plunge, poor man's?

Post by Retlaw01XJ »

Who makes the cam? I'd be concerned about the quality of the components.... like if it's a new cam, or a regrind on an old cam?
Cool website, tho. They appear to be hard-core racers, should be able to give you detailed info.
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Re: taking the plunge, poor man's?

Post by crusher242 »

Really curious about whats up with this package.
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Re: taking the plunge, poor man's?

Post by Zorm »

I'll call them tomorrow and try and get the scope. Its a crane cam set.
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Re: taking the plunge, poor man's?

Post by Cheromaniac »

Zorm wrote:i found SK68-200-4 at http://www.buyracingparts.com/camshafts ... 0-4--.html for $215.00
That's very cheap so I hope that the items are good quality. Normally I'd expect to pay about $300 for a cam, lifters, and dual roller timing set. That pic shows a set of roller lifters. You'll be getting flat tappets.
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Re: taking the plunge, poor man's?

Post by Dezertxj88 »

Cheromaniac wrote:
Dezertxj88 wrote:The 87-95 cam compared to the 96-97 dual pattern isn't even fair and of course if your going to shell 100 bucks or so out for the OEM cam, you may as well upgrade to a slightly better one for about the same price..
I certainly wouldn't advise anyone to swap their existing OEM cam for a different vintage OEM cam. My philosophy is to either reuse your existing OEM cam in a poor man's stroker or upgrade to an aftermarket cam.
Sorry to clog this thread, I'm trying to keep it public vs back channel for those who search for info similar..
Dino considering I have a 87-95 do you feel its pointless to get the 96-98 cam? My motor thats been built to replace my 88 is a 91, ported head (7120), stock valvetrain, 70mm 4.3L vortec TB. Honestly the motor was rebuild with 9:1 Cr, maybe slightly less, .048 quench..hasn't been ran yet because we are finshing the quirks of the turbo. It'll run on 6-8psi..no more.
I have run the Comp 68-201-4 before but honestly I didn't feel it was worth the cash. I'm thinking for the turbo motor, stick with the 87-95 and maybe advance it 1-3 degrees or to just get a 96-98 cam? I'm trying to find a cheap cam that'll work good with the turbo..
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Re: taking the plunge, poor man's?

Post by Cheromaniac »

Dezertxj88 wrote:Dino considering I have a 87-95 do you feel its pointless to get the 96-98 cam?
If you already have the 87-95 cam, keep it.
Dezertxj88 wrote:I'm thinking for the turbo motor, stick with the 87-95 and maybe advance it 1-3 degrees.
That's a good idea. Certainly cheaper than buying another cam.
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Re: taking the plunge, poor man's?

Post by Dezertxj88 »

DIno I finally found it. the dyno graph of the 87-95 vs the laster 96-98. Incase anyone wants to see the difference stock vs stock and then stroker vs stroker its in that thread.
http://www.jeepstrokers.com/forum/viewt ... ?f=8&t=111

It does appear that the 96-98 is good for a non stroker motor as the power is much lower..it comes on sooner and the 87-95 is a later cam coming on around 3000rpm. But for a stroker I'd keep the 87-95 cam all day! Thank you Dino for the help. :cheers:
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