L98IROCZ1987

I am running an 87 irocz with a t-56 trans, 3.70 posi 9 bolt rear.
Im sticking with the tpi setup because I want it to look somewhat stock.
I currently have a 305 tpi 5 speed prom stage 2 by hypertech that I was running with 24 lbs injectors and a basically stock 355. I pulled the motor which has low miles to build it up a bit.i have ready a set ofheavily ported heads and stock intake manifold with slp runners.The heads are zz4 aluminum heads they have the stock valves and i gasket matched the intake and exhaust sides of the heads. I opened them up alot including the mounds around the valve guides and cut the guides even with the ports.My plan is to have the steel valve guides cut down so I can run a high lift cam with matching springs. I dont want to change the guides to or I would have to have the new valves cut.
The heads are 58 cc so I am not sure I want to run flat head or dish pistons as I was also thinking about running a 383 eagle crank this time. Not sure .. May run stock crank anyway im wondering if I can run a 5.25 ish lift cam and also any rec. durations?? Im am sticking with roller cam and 1.5 rockers . Also im going to run gear drive. I know that I am going to have a prom custom made / dyno so no big deal there. Thanks guys!

vetteoz

iTrader: (13)

Not required
ZZ4 heads come stock with springs good for .525 lift
LPE 219 cam ( .560 lift) works with them no problem

So you need to all the calcs to see what CR you get with what piston on a 383 combo
What gas you want to run?

EFI computers really love the noise / vibration from those

articwhiteZ

iTrader: (56)

to run a gear drive ya have to have a chip cut. that will do away with the knock info

i run gear drives. mine retards 0.0
also good for Mech roller cams... just so ya know

L98IROCZ1987

I have the l98 heads not zz4 , so it doesnt have the better valves ect.

L98IROCZ1987

Ohh and I was going to run hyd. Roller lifters

L98IROCZ1987

Pump 93 gas , ethonol bullshit and all

vetteoz

iTrader: (13)

You said ZZ4 heads

Alum L98 Vette "113" heads ARE ZZ4 heads, the ZZ4 have some better porting
http://ls1tech.com/forums/3412016-post9.html

http://ls1tech.com/forums/3335118-post8.html

L98IROCZ1987

Yep L98 - Right my mistake, so I am def replacing the springs. Do you know for sure if the guides will clear the cam you mentioned? I always thought the zz4's came with shortened bronze guides???

L98IROCZ1987

I found a camshaft similar to what the lpe 219 is.... Alot cheaper and a bit more agressive.
Its a comp cams xfi
249-sk08-464-8
Lift: 5.50/5.46 with 1.6 ***** im running 1.5*****
Duration - 252*/264*
Rpm range is 1000-5000 - seems good for a stock plenum like I am running rather then the super ram. Any opinion would be great ! Thanx fellow F body fiends lol