camming my renix ?!?!

[bmxdude151]

I have an 88 comanche 4.0 auto renix 4x4. Well recently I lost compression in cylinder six due to a bad lifter that ended up ruining the cam as well. So I went ahead and ordered a cam, lifters, and valve springs. http://m.summitracing.com/parts/cca-cl68-232-4
So I guess im asking what should I expect out of this setup and is there any simple cheap tricks to get more hp and mpgs while im at it? Its also bored .040 over with a K&N filter and an after market muffler of some sort with out a cat.

 

[cruiser54]

MPGs no. Power yes.

What's cheap to you?

 

[bmxdude151]

In all honesty Im pretty broke at the moment, but theres still room for somthing that can make the world of a difference. I have a manifold off of a ho motor but thats to much work to swap in at the moment. im thinking a cai is going to be high on the list of things to do. would injectors help this set up at all?

 

[cruiser54]

No "world of difference" things anyway. Save your money.

 

[bmxdude151]

Alright so if i had more money to spend what would be a good upgrade to spend that would compliment this setup?

 

[*89Laredo*]

Stroker.

 

[bmxdude151]

at this point i wish i had the money to do a stroker while its all apart. Im thinking the next step is a ho intake and exhaust manifold.

 

[cruiser54]

at this point i wish i had the money to do a stroker while its all apart. Im thinking the next step is a ho intake and exhaust manifold.

Maybe HO exhaust manifold with REnix intake and a 60mm bored throttle body.

 

[bmxdude151]

So i came into a problem while installing the valve springs. I found out the stock retainers wont work with the new springs so I ordered these.
http://m.summitracing.com/parts/cca-744-12
So today i go to install the springs and retainers and noticed the retainers have a larger bore than the factory ones and the keepers arent working with the retainer. am i missing somthing? summit has these,
http://m.summitracing.com/parts/cca-603-12
but they are a stock replacement and a summit representative pointed me towards them. at this point im wondering why i cant run the stock springs?

 

[bmxdude151]

also under notes it said the Recommended valve springs are for 1964-1988 applications. this is for and 88 comanche so i figured i would need the springs.

 

[BIGSLVRXJ]

Just so you know a HO exhaust manifold will not work with a Renix intake, they conflict with each other. You can however use a Renix exhaust manifold with a 99+ intake.

 

[cruiser54]

Just so you know a HO exhaust manifold will not work with a Renix intake, they conflict with each other. You can however use a Renix exhaust manifold with a 99+ intake.

How so? I've use early stock HO manifolds, and the only conflict was the need for some filing of the intake manifold at the front and rear.

If I could post photos, I would.

Now, some HEADERS off ebay etc present some real issues sometimes.

 

[bmxdude151]

yep already figured that out and im using the stock manifold. but im currently having problems with the valve springs and fitment. it seems the retainers i got are for a larger valve . so im thinking my 88 renix engine doesnt fall under the notes where 88 and older require new valve springs, retainers, and keepers.

 

[Keithmania]

i am running a 93 HO head on a 90 renix rig with no modifications at all, works perfect

 

[cruiser54]

i am running a 93 HO head on a 90 renix rig with no modifications at all, works perfect

As long as you use the Renix intake gasket.

Did you port match the intake manifold and head?

 

[cal]

So i came into a problem while installing the valve springs. I found out the stock retainers wont work with the new springs so I ordered these.
http://m.summitracing.com/parts/cca-744-12
So today i go to install the springs and retainers and noticed the retainers have a larger bore than the factory ones and the keepers arent working with the retainer. am i missing somthing? summit has these,
http://m.summitracing.com/parts/cca-603-12
but they are a stock replacement and a summit representative pointed me towards them. at this point im wondering why i cant run the stock springs?

Those parts are for a 4.2 and not a 4.0 .. IIRC, Comp does not have a spring that works on the 4.0.

You want the Mopar Performance stuff for the 4.0 / Magnum.

 

[Keithmania]

would changing out the rocker arms yield the same results? I know that some guys have had success with the Yella Terra 1.7 ratio rocker arm kit.

http://www.naxja.org/forum/showthread.php?t=1087791

 

[bmxdude151]

Well I got the engine all put back together and running. I got approximately 800 miles on it now and all is good so far and Im getting 14 mpgs. Not great but not terrible. As for the cam I was hoping for something a little bit more aggressive. Its hardly noticeable at an idol. It does have a little bit more get up and go. I reused all the stock valve train components as well. I would say this cam is a pretty good stock replacement.

 

[cal]

If you wanted more aggressive, would have wanted the Comp 235 - but can't reuse stock valve train with it.