What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

camshaft advice needed

mr250twostroke

mr250twostroke

1/2 ton status
Joined
Jul 21, 2006
Posts
1,603
Reaction score
3
Location
Eatonville, Wa
Im doing the timing chain on my 88 :burb: and would like to swapout the cam while im in there. Hoping to get more torque/?. So many options, so little knowledge. What works best with you guys? Its a TBI 350/700r/4.10's on 35s and will be towing alot (nothing major). Heads are rebuilt (stock) waiting to go back in. If I fubar:doah: these exhaust manifolds with busted studs enough I will get new, bettter flowing ones.
Suggestions/Advice? Experiences?
Thanks in advance and happy holidays:xmas:
Dustin
 
My best advice in your situation is to call Comp cams and give them your info and let them choose a cam that will be friendly with the FI and yet make more low end torque.

Later tonight when i get home i could give you my recommendation.
 
4X4HIGH said:
My best advice in your situation is to call Comp cams and give them your info and let them choose a cam that will be friendly with the FI and yet make more low end torque.

Later tonight when i get home i could give you my recommendation.
Click to expand...

Thanks, Ill call them now. Summit wasnt much help:(. Your recommedation would be cool.
Dustin
 
When you call Comp ask them about their XFI cams. You have to be careful because of the FI but the XFI cams are designed for FI and make lots of torque.
 
4X4HIGH said:
When you call Comp ask them about their XFI cams. You have to be careful because of the FI but the XFI cams are designed for FI and make lots of torque.
Click to expand...

Heres what he recommended:
http://www.compperformancegroupstor...e_Code=CC&Product_Code=12-249-4&Category_Code=

sta500666 said:
I was looking into this cam http://www.holley.com/60102LK.asp It seems like a mild came and good with automatic tranys. But I don't really know much. Just another option for ya.
Click to expand...

Thanks, VooDoo seems to be pretty popular.
Dustin

longbedder said:
Suggest reading this page at TBI Chips. Some good info in there for you.

http://www.tbichips.com/truckmods.htm
Click to expand...

Thanks, ive been checking that out. Good stuff:waytogo:.
Dustin
 
Less valve overlap is better for low-end torque, afaik. more overlap works well for HP in high-rpm motor since it helps keep the gasses moving out of the combustion chamber faster.
 
IMO if you go with the comp XE249. Get better than stock exhaust. Headers and a good free flowing exhaust will give you the most out of that cam. Also Get the recomended springs for that cam. I do not advise using stock TBI head springs. They are weak and can start floating in the mid-high 4K RPM with a higher than stock lift cam.
You should also get an adjustable fuel pressure regulator so you can fine tune the fuel pressure to the new fuel needs for your engine.
Beings you have TBIchips web site you may want to get a chip burned for that cam. It will work with the stock chip Ok. But a custom chip will help you get the most out of it.
Might as well throw on an Edelbrock intake manifold too while you have things apart.

If you want to keep things more on the stock side look into a Comp 252BH cam it is a good replacement for the stock cam in a stock engine. It is a great towing cam and wont hurt your gas MPG. Works fine with the stock chip.

When did chevy truck engines switch to hydraulic roller cams?
Click to expand...
Trucks got roller cams in 1996 when they switched to Vortec. But the eariler TBI blocks are drilled and tapped for the Lifter retainers/guides. So it is a fairly easy swap to install a roller cam in them.
 
mr250twostroke said:
Heres what I went with:
http://store.summitracing.com/partdetail.asp?part=CCA%2DCL12%2D249%2D4&autoview=sku

http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=178072

This helped alot:waytogo:
http://www.tbichips.com/truckmods.htm

Anybody do this?
http://www.tbichips.com/ultimateMODS.htm

Thanks for the input,
Dustin
Click to expand...

If you are using that cam with 1.6 to one rockers. Definatly replace your stock Valve springs with performance springs.
Re ultimate TB mods.
I have not modified a TB that way. But I do have a bored out to 46mm stock TB it flows aprox 590 CFM. I like it. Just right for a 350.
 
Thunder said:
IMO if you go with the comp XE249. Get better than stock exhaust. Headers and a good free flowing exhaust will give you the most out of that cam. Also Get the recomended springs for that cam. I do not advise using stock TBI head springs. They are weak and can start floating in the mid-high 4K RPM with a higher than stock lift cam.
You should also get an adjustable fuel pressure regulator so you can fine tune the fuel pressure to the new fuel needs for your engine.
Beings you have TBIchips web site you may want to get a chip burned for that cam. It will work with the stock chip Ok. But a custom chip will help you get the most out of it.
Might as well throw on an Edelbrock intake manifold too while you have things apart.

If you want to keep things more on the stock side look into a Comp 252BH cam it is a good replacement for the stock cam in a stock engine. It is a great towing cam and wont hurt your gas MPG. Works fine with the stock chip.
Click to expand...

Thanks for the advice:D.
Im looking into the Edel. intake.
Exhaust man. has busted studs (tryed like hell not to:doah:) so I do see something else replacing them $$$$. Exhaust y's to single 3" no cat w/Flowmaster. Seems like all its missing is headers?
Asked them about the springs (Summit) and was told I didnt need:confused:. My heads are rebuilt if that matters although springs are still "stock".

Will look at the fuel regulator.

I agree on the chip for sure. I made the mistake of getting a chip for a bmw I have thinking I was done with the mods. I wasnt of course, and ended up chipping twice. This has just grown into much more than planned (as if theres another way:haha:) and I want to have all ducks in a row before chipping.
I have a blazer project that im supposed to be soaking my money in, and am, but the burb is just supposed to gas and go. Gotta button this up and focus on the blazer.
Thanks again,
Dustin
 
As long as you are doing it, why not a roller cam? Prolly more money, but theoretically more performance. Donno how much more though.
 
BGKYK5 said:
As long as you are doing it, why not a roller cam? Prolly more money, but theoretically more performance. Donno how much more though.
Click to expand...

Not even close to worth the cost, unless you've got a factory block all set up for it, and can get the components used/cheap.
 
mr250twostroke said:
Heres what I went with:
http://store.summitracing.com/partdetail.asp?part=CCA-CL12-249-4&autoview=sku

http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=178072

This helped alot:waytogo:
http://www.tbichips.com/truckmods.htm

Anybody do this?
http://www.tbichips.com/ultimateMODS.htm

Thanks for the input,
Dustin
Click to expand...

http://store.summitracing.com/egnse...S=1&Ntt=edl+3704&searchinresults=false&N=+115

Added the edilbrock and springs to my order and am supposed to get everything but the rockers friday:D. Rockers after xmas:(. At least ill be able to get most of it done this weekend.
Thanks for all the help:thumb:. Ill update my progress in the pacific region and see how this turns out:eek1:.
Dustin
 
Comp. Cams
CAM HELP™
800-999-0853​
Cam maker part # size cam price kit price

Comp. Cams 12-388-4 173.00
Comp. Cams 12-249-4 206/212 434/444 173.00 445.57
Comp. Cams 12-256-4 212/218 449/456 173.00 445.57

this was the choices they gave me with all the modifications i did to my 350 tbi i went with the cam kit in red it runs and pulls hard after i got the computer chip programed right.

Dudley
 
You must log in or register to reply here.

Latest Posts

Top Bottom