4.6 stroker compatability

Err.. ok... you fail at math. Assuming a max 18% drive train loss on the manual, 25 engine HP is 20.5 rwhp. 25-(25*.18)=20.5. If you think of it, how can 5 be 18% of 25.
Nominated.

Yes, the valve springs on the kit are not for the 4.0L head, they are for the 258 head, and will not work on the 4.0L head.
 
RedChuck said:
25 hp is equal to 3-5 rwhp

15-18% loss on a manual

so 3/.15 = 20 5/.15 = 33.3 also 5/.18 = 27.7

so 3-5 rwhp is the same as 20-33 hp give or take

so if you have a auto then your getting better then a 25hp gain if your achieving 3-5rwhp!
Click to expand...

LOL!

So my 190HP 6 cyl HO only puts down 24-40 rwhp?
 
I've read it before that the comp springs won't work--they should advertise it as a 4.2 cam kit whose cam can be used in a 4.0(I'd be mad if I bought a "4.0 kit" that had parts I couldn't use that I was planning to). That would suck if 25hp at the crank only made 3 to the wheels.
 
I just got off the phone with comp cams and they assured me that the springs in the kit are compatible with all pre 88 4.0s. since im running a 87 block and head i shouldnt have any troubles. So what about the intake conversion? I'm still confused on whether its worth the money or not. How much horse power and torque can i expect to put out?
 
In your first post you said it was an HO, but they didnt start making those until 90 or 91 I believe. (Obviously after 1988) Check what casting number you have on your head, an 87 block would be renix.
 
They made an H.O. in 87 and it was actually tagged on the vehicle on the hatch as well. It is actually a wagoneer xj with the stock tow package and a dana 44 rear. I'm sorry but comp cams would have to be extremely stupid to sale springs in a kit that wont work for the engine advertised. and i do believe that they would've edited it by now, besides the fact that three people from comp cams i have talked to assured me that it would work.
 
you are very negative talyn. i just still dont get why they wouldnt note the error in compatibility. Say i wasnt going to do the complete kit. what is a cost effective spring kit and what about valve guides and retainers and everything else. Ill get the casting number today.
 
redrider2911 said:
you are very negative talyn.
Click to expand...
Oh wah. Would you like a Wine-a-kein with your Wah-Burger and Cries?? :cry:
i just still dont get why they wouldnt note the error in compatibility.
Click to expand...
Because Jeep 4.0L performance parts are such a small market that they aren't going to test very many combinations, they rather invest their efforts in more lucrative sectors, such as Chevy. The same reason they say the 68-231-4 isn't for FI when it works fine with it, the same reason that they never made a cam specifically for the 00+ retention method, the same reason all after market cams use the earlier style cam with narrower lobes. The fact is that there aren't many companies willing to put effort in to 4.0L performance parts.
 
redrider2911 said:
They made an H.O. in 87 and it was actually tagged on the vehicle on the hatch as well. It is actually a wagoneer xj with the stock tow package and a dana 44 rear.
Click to expand...

No
 
Umm yes. dont worry your not the first person to tell me my jeep doesnt exist. You guys are really making me wonder what it is i have exactly so i gathered all the info i could.

I know its far away but you can see the emblem on the bottom left of the hatch
4.0 litre
high output
anglefromback.jpg


close up
1203091230_0001.jpg


as far as i can tell it is the original hatch, original paint, and original emblem. i have seen another jeep at home depot next to where i work. it is also a 87 jeep wagoneer tagged high output on the back, same exact color scheme, rear dana 44, stock tow package, and four headlights.
frontflex.jpg


dont mind the wishbone, ive ditched it for a 3 link and panhard since then.

my title
1203091012_0001.jpg


i have also got my engine casting # EF 8933002665
and what i believe is the head # 2668? the only significant number i could find
the ecu # which is still a bendix above the gas pedal. # EF 8953005026.

I dont know everything nor do i think i do. i ask alot of questions becuase i believe that is one of the best ways to gain knowledge. if you guys have any ideas what exactly i have then let me know. then i can get on with the rest of my stroker questions lol.
thanks
 
I could stick a HO sticker on my washing machine, but it still doesn't have a 4.0L HO engine.

What you have is a renix 4.0L, indicated by the head number. And the Comp Cam valve retainers still won't fit the valves. :clap:
 
oh yea sorry, hadn't started mentioning the stroker thing yet. i was just curious about my jeep. but sure, go ahead and jump for joy. It is obviously a stock emblem though, not sticker, and from the factory before the even supposedely built the h.o. so why is it on my jeep and this other guys jeep? as far as the springs go, i could make them work. its mainly the install height that is the biggest difference, either longer valve stems or machine the head... after doing some more searching around i did find quite a few people that were still running there hi lift cam with stock springs without apparent issues
http://forums.jpmagazine.com/70/7109800/jeep-engine/comp-cam-swap/index.html
mudb8 has no problems with stock springs
http://www.jeepforum.com/forum/f11/cam-upgrade-385579/
steve88xj says a stock spring can handle .485 lift. the 232 max lift, .476

and i've found more references. is there any way to test for sure? I'm never going to go over 4000 since im doing the whole build for the low end so i shouldnt have a problem with floating valves. what do you guys think.
 
redrider2911 said:
oh yea sorry, hadn't started mentioning the stroker thing yet. i was just curious about my jeep. but sure, go ahead and jump for joy. It is obviously a stock emblem though, not sticker, and from the factory before the even supposedely built the h.o.
Click to expand...
sticker or emblem.. same difference.. it is stuck on.
so why is it on my jeep and this other guys jeep?
Click to expand...
Because a PO thought it would be cute?
as far as the springs go, i could make them work. its mainly the install height that is the biggest difference, either longer valve stems or machine the head...
Click to expand...
sure.. but the install height isn't the major problem.
after doing some more searching around i did find quite a few people that were still running there hi lift cam with stock springs without apparent issues
Click to expand...
You know the bind height of the stock spring? No, of course not.. if you did you wouldn't even bother mentioning running that cam with stock springs.
 
redrider, if you're going to build a stroker. Why not send the head to a machine shop for some work? It's probably worth it. You can probably research (jeepstrokers.com) and find out how to make the cam you'd like to run work with the head you want. Comp cams says that the cam kit with the springs they sell works with the 4.0 heads (I'm going off memory here and not currently reading anything) but it doesn't for some reason I can't figure out. It's, what I think, an issue with people building strokers with the cam kit they say will work and actually doesn't. I think it's for the 4.2 motor that you get the crank from.
Talyn, no need to be an internet bully just because you know more about a particular subject than some people.
 
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