It is time to replace the 305 in my car. I have located a nice 350 out of a wrecked IROC. Since I'm doing the swap, and will have the motor out any way, I think I should look at getting a cam. The motor is stock, and right now, all I can do is freshen up the motor a little, so I'm going to keep the factory heads for now. My question is how much lift can the factory heads/springs take. I was looking at a Crane Compucam 2032. Specs are 214/220 lift 112 L/S, Gross lift 452/465. I know it is more agressive than I need right now, but I will mod the rest of the motor to catch up. I just don't want to buy two cams. Thanks for your help.

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1989 IROC-Z Original 350 was swapped for a 305! Why, I'll never know.

 

I would think you could get away with that cam with the stock setup...but that's an awful small lift cam for a built up motor...which is what I was reading you intend to do later...use the new cam in a new motor...FWIW...I am running a 08-302-8 cam in my 305 mildly modded IROC...It has .480/.480 lift and 210/220 duration...112 LSA(I think)...If I were to build a built 355...I would probably use a similar cam or even bigger than my current one.

Call up Comp or Crane's tech dept and see what they say...they are the experts and I'd trust them more than I'd trust myself.

Good Luck,

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GregF
87 IROC

 

Thanks for your help. That is what I needed.

 

While we are on the subject of cam selection, what are the opinions of Comp Cams Xtreme Energy 08-432-8? It has a .510/.520 lift and 282/288 duration 110 LC. This will be put in a 350 with pocket ported Vortec heads, TPI setup, 11.07 CR, and some damn good fuel. Since there is no such thing as a cam to big, just a motor to small, a bigger engine may be in the works if this doesn't work out.

Thanks for the input,


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Joshua Johnston
1991 Z-28
Flowmaster
K&N
305 / 5spd. (Temporary)

 

ZBRA was selling a LPE cam it was a pritty big cam, page him and see if you can get it. He mad some good power with that cam.

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89 red iroc-z
386 strocker
ross pistons 10.5.1
eagle h-beam rods
miniram
slp cam 224 230 535 544
1.6rr
edelbrock performers p+p
ford 9', 4.11, 31 spline
baer rear brakes
line lock
all the bolt ons
200 shot on the way

 

TOOOOOOOOOOOOO BIG!!! I think the duration numbers and tight LSA would make the thing non-computer friendly...but I could be wrong...



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GregF
87 IROC

 

Do you really think this is to big for a TPI set up? The LCA of 110 is what I am worried about. TPIS's roller cams are either 112, or 108. I didn't really think 110 was that bad. The duration is on the high side, but is only slightly bigger that the TPIS cams. If it is the concensus of the group that this is to big for the computer, the either I will call TPIS and have a custom chip made, or I will go the cheap route and slap a carb and intake on it. Please let me know what you guys think.



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Joshua Johnston
1991 Z-28
Flowmaster
K&N
305 / 5spd. (Temporary)

 

gsf,
I must appologize for questioning you. You were right about my motor being to small for the cam I had bought. I called TPIS, and they said with a TPI setup, the duration @.050 should be 210-220. Mine is 230/236. This cam rating is 2500-6000. Of coarse the TPI is dead after 5000 USUALY. Thanks for questioning me though, otherwise I would have had an expensive POS engine. I am returning my cam for a Comp Cams 08-305-8. .510/.510, 220/230. This is out of the 210-220 range, but since it is made for TPI motors, I HOPE it will work. Let me know what you guys think.

Thanks,


------------------
Joshua Johnston
1991 Z-28
Flowmaster
K&N
305 / 5spd. (Temporary)

 

I would go with the GM Performance Parts Lt4 Hot Cam over any of those other ones. It is way cheaper than those other cams (especially if you know someone who works at a GM dealer....hehe) and is designed to be used with computer controlled engines. The LT4 Hot Cam's specs are:
Adv. duration 279/287, duration @.050 218/228, .495/.495 lift w/1.5 rockers.
Valve springs will need to be replaced on an L98 but otherwise it will virtually bolt right in (provided it is a roller motor). This cam would like some heads but will function with the stock ones decently plus it will be a good foundation for later.

 

What is the part number for the LT4 Hot Cam? I was looking for it and didn't find it...apparently I didn't look hard enough. I figured it would be better than the Crane Compucam 2040 I have. I was going to use it in my 305, reconsidered, and and going to build a 350. (looking to sell it, springs and all). What is the number? I work for a Chevy dealer, so getting the cam should be cheap . I would say the 2032 is good for a stock 305 or 350, the 2040 for a hot 305 or mild 350, and the 2050 for a hotter 350. That 2032 will be OK, but is kind of mild. Port the plenum and intake while you have the engine out...will help an aftermarket cam work better. Be sure to change springs. Good luck

[This message has been edited by dhirocz (edited April 01, 2001).]

 

I personally love my slp cam it is the smaller of the two in summit(480 487 lift) every one I have raced can't belive that is what I am running I have a few other mods but, the cam and slp headers are the biggest mods I have.

 

That's exactly the same cam I have. I would suggest this cam strongly, if your intake is up to the job. Email me if want more details.



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'88 GTA 350 Full of Leprosy (rust)
Full Exhaust, Free mods, Xtreme Energy cam, Intake Pieces and 2100 RPM TQ

13.39@102.50 MPH
1.90 Sec ----- Best 60FT
104.23 MPH -- Best Trap Speed
AIM HIGH!

 

By the way, no MiniRam here. Good old SLP runners, Edelbrock base and 58mm TB (my only mistake, this is the real "torque killer"). Hedman hedders with crappy edelbrock Y pipe (the only plus is that it has a cutout, good for at least 2 tenths), Stock heads (except for springs), stock bore, stock gears and even pulled my best 60' with stock torque converter (1.90).
Obviously gears and converter will help, but it does works on stock parts.
I am confident that the car can run in the 13.20s, but every time I go to the track, the wind is blowing hard against me. Also fixed my AutoZone distributor with a new pickup coil from gm and the car will spin the tires anywhere from 35-40 mph and below. There was no loss in torque with the cam swap, ONLY with the throttle body swap (stay with 52mm or smaller). I plan on buying aluminum heads in the future; the day this happens have no doubt that 12s will be a piece of cake.
Rick

 

The GM p/n is 24502586 and total cost with tax included for me, with my discount, came to $195.64. Pretty good deal! especially when shipping and handling and tax is added to all the other cams that have to be ordered.

p.s. Check out the GMPP HD roller timing set too..... this one is only a single roller set but the gears and chain are waaaaayyyyyyy bigger than any aftermarket double roller set!! I put it next to an edelbrock double roller set and it made that double roller chain look like something off of a BMX!! p/n is 12371043 for roller cams. It should cost ya about $45 with tax included.

Laterzzzzzzzzzzz

[This message has been edited by Matt87GTA (edited April 02, 2001).]

[This message has been edited by Matt87GTA (edited April 03, 2001).]