im amd about decided on this cam, BUT it says on summit that the max compression for that cam is 8.6:1. My exploroer motor has 9:1. Will this affect anything? what is our stock car comp? tyanks
right from the summit website http://store.summitracing.com/defau...110&Ntk=KeywordSearch&Ntt=crane+2031&x=6&y=11
Specifications:
* Advertised duration: 276 intake/282 exhaust
* Duration at .050 in.: 214 intake/220 exhaust
* Gross valve lift: .513 in. intake/.529 in. exhaust
* Lobe separation: 112 degrees
* RPM range: 2,000-5,500
* Good idle, daily performance usage with small supercharger with MASS airflow fuel injection, good mid-range torque and horsepower, for use with 1.7 ratio rocker arms
* 2,400-2,800 cruise rpm
* 10 lbs. max boost with max * 8.5:1 compression ratio max
see? what does a stock motor come with? also, do i HAVE to change my rockers to 1.7 do you think? will it hit the pistons?
well the only diff between your combo and the one me and a freind assembled for his car last year is the heads, he uses 94 Cobra GT-40 Iron heads, i have the GT-40's off the explorer (96 model with super low miles)....anyway with 1:72 and the 2031 there was plenty of clearance, we almost said **** it and only clayed one side, but we did em both to make sure.
anyway, compression is about what you said, hes hitting 12 # with a PS1C and it runs great.
that cam will have a bit too much lift for gt40 heads, they like lift at around .490-.500 lift, the dur. is good with a 6 diff. in dur. and a good split that fav. the exh. side (from what I have read/heard is that .010 - .015 is good with gt40s) and not bad for a off the shelf cam. You will probably have good power with that cam but it is a bit too much lift. I would probably say if you ported and got a good valve job that the lift would ballance out to be a good cam for those heads.
hmmm, what do you suggest than? i really would like to get a out of the box cam, due to time, and money. I WILL be putting in heaver valve springs, so is that what you mean too much lift?
how about the trick flow cam? only thing is i like how the lobe seperation is on the 2031, good for computers. I might just throw in that crane, should rock i hope
whats an xe lobe? ok, i would like to get that trick flow now from what people have told me, only thing is that it doesnt have the lobe seperation for our computers to like it for idleing. the crane has a 112 i believe, what ever is good for our cars anyway. the specs seem the same on the cams, except for the lobe seperation
well the lift of the tfs1 is .499 and .512 (or is it .510?) w/1.6r anyway I run it and looked at it since it was realy close to the numbers the heads like (although still a little high), and you are right the lobe sep. is kinda funky with the 94-95 computers. Its your choice and they both have there up and down side.
Bear with me as I am a newbie, I need a quick reply because I am helping a friend put the TFS stage 1 cam in today and we are worried about the piston to valve clearance.
Car is a 91 gt 5.0, stock bottom end, but we are installing edelbrock performer 5.0 heads with 1.90 intake valves.
Do you think the tfs stage 1 cam will work with stock pistons and 1.6 rockers?
Yes, it will work as said above, I dont think you run into issues until you get 2.02 vavles with the stock pistons, or go with a lot of milling/shaving the heads with 1.7rockers on the stock pistons. Or both 2.02 and shave of course.