I wan to put a new cam in my 86 305 TPI Iroc.
I have not touched the heads or cam yet but I
am going to do the cam this week. Will this cam work? I do have pullies, digital 6, nitrous, 3.73's, all the goodies in the tranny, plenum done, working on the throttle body, heads, injectors and base as well.
CAN I RUN THAT CAM?
Please advise ASAP?

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Jamie James
1986 Iroc-Z 305 TPI
1.90 60 ft 14.15@ 95.75
1.74 60 ft 12.84@107.75 on the bottle.
My IROC:
http://personal.nbnet.nb.ca/jjames/homepage.htm

 

Anybody?

 

what are the specs?

 

we need to know the specs of the cam duration @.50 the rocker arm ratio stuff like that. it will probably work but when you get into durations over 224@.50 it get tricky

 

Assuming I have the correct specs (210/216 @ .050, lift @ .440/.454) I think it looks about right.

I have a cam that spec out at 204/214 @ .050 w/ .420/.442 lift in my old 86 IROC's 305 TPI (basically a 2030), and it is alot better than the stock cam, but I think I could have gone a little bigger. The 2040 looks like a good bet, it's just slightly bigger but I don't think it will be too big.

I'd try it...

BTW, I was running that 204/214 cam in the 305 TPI auto w/ the only mods being a ADS computer chip, flowmaster cat-back, catco 3" cat, ported plenum, shimmed FPR, and 3.42 gears w/ a rebuilt auto. No head work or anything, stock exhaust manifolds. I drove the car for quite a while w/ it in this state of mods and was really happy w/ the cam. I have since retired the car to my brother, and TES headers are up next for the little 305 TPI...

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

[This message has been edited by Ray87Z (edited March 20, 2001).]

 

Thanks for the information.Those are the correct specs Ray 87. Do you have a suggestion for a roller timing chain and gear? I am running a Digital 6 MSD, dynomax headers, accel coil, taylor wires, ADS superchip and other mods.
I plan to redo the heads porting and polishing and adding new springs. I am unsure as well what to add for springs, any suggestions....size, type etc? What about a damper?

------------------
Jamie James
1986 Iroc-Z 305 TPI
1.90 60 ft 14.15@ 95.75
1.74 60 ft 12.84@107.75 on the bottle.
My IROC:
http://personal.nbnet.nb.ca/jjames/homepage.htm