I plan on build up my 305, and i just want to find out what the best cam i can get that will work with the computer. I also want to get new heads, i was thinking of the S/R torquers. I will also have headers and the rear end gear is 3:42

I hope that info helps.
THANK YOU

 

The ZZ4 or LT4 cam would do well, and are relatively cheap

 

Those might be ok, but if his 85 is original he has a non roller motor and both cams suggested are 87& up style roller cams!

Duke901,
If your heads are original they should be the 416 castings which flow pretty good stock, if this is the case, I think others would agree that porting your existing heads and leaving the stock intake valves or having bigger 1.94 intake valves installed, They could or will, most likely outflow the torquers for quite a bit less money. The original cam the 85 came with is actually not so bad but I would go a little bigger myself. Possibly something like the Summit Racing Sum-K1102, (if using the stock prom). In the past, with this very combination and some port work to the TPI, I have had very good results for next to nothing out of pocket.
Although some would say go bigger with the cam and so fourth, unless you modify the stock TPI unit, (more than just porting it) I myself think it is a waste of time.
Also like most others, once you start to get your hands dirty and modify your car there seems to be no end to it, you might just find yourself eventually scrapping the 305 and moving on to bigger and better combos, If this is the case go with mentioned combo, save the extra money and start building a bigger engine!
Just my thoughts!

 

The 85 computer sucks, and finding support for custom programming is going to be difficult. If you plan on doing some serious mods, I'd look into updating to a newer computer. I did and it made a world of difference. No more 16 second 350.

Anyway... your car is going to obviously depend on the rest of your setup. The 85 came stock with a pretty good cam, so you're not going to find huge gains by going with a bigger one, but if you've got the heads to support it, you can definately go bigger. Just don't over do it. As long as you run TPI you need to use a cam that's going to compliment the low rpm power band of your induction.

 

So if i just get my heads worked on, they will flow the same or out flow the torquers for less money. With the cam im going to keep the stock prom, Im not going to go to wild with this 305, i just want to get alittle bit more out of it. So do you think that summit cam (SUM-K1102) would work with the computer, and do you know what the lift is on that. Or is there a better cam that would make more power.
THANK YOU

 

See sig for cam specs & I'm running ported & worked stock TPI heads.
BD3

 

Well, im thinking maybe i will just get the heads and the rest of the TPI ported. Maybe i will go with some 1/6 rockers but i dont know. How much does it usually run to get everything ported. WIth all that how much do you think i would gain, i was thinking maybe like 250hp.

THANK YOU

 

Duke 901
Click on these links reguarding 416 heads and porting.
https://www.thirdgen.org/techbb2/sho...ight=416+heads

https://www.thirdgen.org/techbb2/sho...hreadid=117410

Question (So do you think that summit cam (SUM-K1102) would work with the computer, and do you know what the lift is on that. Or is there a better cam that would make more power)

The summit Sum-k1102 is actually a cam and lifter kit for $79.95 the cam specs are Duration @.050 204 in. 214 ex. Lift .420 in.
.442 ex. with 112 lobe sep. The stock cam in your car is
Duration @ .050 202 in. 206 ex. Lift is .403 in. .415 ex. with 114.5 lobe sep. when it is new, my guess is it has flattened out a little over time and wouldnt hurt to replace.
I think with your headers, head and TPI port work, the summit cam and possibly 1.6 rockers on the intake only, I think you should be making the HP you mentioned, possibly more. Also your stock 85 computer will work fine with this set up. I know this because I have used this cam kit in one of my 85s along with port work and it ran great.

 

85TPI400

Thank you very much, So i should just put the 1/6 rockers on the intake side, why wouldn't i put it on the exhaust side. With all the head work should i get the 1:94 intake valve installed to.
THANKS AGAIN

 

Try the COMPCAM XE262. Suppose to give about 45 HP increase and will run decent on stock chip.

 

All my input thus far was based on personal experience with my own 85 TPI vehicles, I have used these parts to try to get the best Performance out of these 305s for the least amount of money out of pocket. (mostly because I was selling them) and wanted to wake the engines up to a bit better than stock before doing so. I would recommend to anyone increasing performance to their 305s to do so on a budget and continue to save their money to eventually build something with more cubic inches!
I was saying 1.6 on the intake only assuming that it would be more affordable to keep the stock intake valves and by doing so it would give a little more lift and increase the duration a couple degrees to make up for keeping the smaller stock size intake valves. I think with the port work, your headers and the stock exhaust valves you should be flowing pretty good out the exhaust side. A set of 8 Plain old 1.6 steel rockers (elgin or similar) can be had for very cheap. I think the last set I ordered from (Powerhouse) www.enginekits.com were under $4.00 a piece including new ball washers and nuts. Keep in mind that when using the 1.6 rockers you have to elongate the pushrod holes in the heads slightly because it changes the pushrod angle a little bit. I honestly havent tried the 1.6 on the exhaust with this particular 305 TPI combination and dont know how the 85 stock computer would handle it so I cant recommend it.
Hope this info helps a little!
Tony

 

Ok thank you very much. Hopefully i will be getting all this done soon. How much horsepower and torque do you think it might add.
THANKS
MIKE