1987 IROC-Z Holley Stealth Ram, Summit Roller Cam install first start, timing, idle, and test drive

Video of Camaro after tearing the motor down and intalling a new cam, pulley kit, water pump, new rockers a Holley Stealth ram and a bunch of other work. Took a while to get her dialed and still lots of work to be done at this time.

[@drdjh2003]

sounds good. I've read lots of good reviews on that summit cam. Great bottom end pulling

[@jeremiahwasabullfrog8854]

I think whatever torque I may have lost down low by switching from the tuned port intake to a Holley Stealth Ram, the cam made up for it and then some up top. I'm putting 1.6 comp magnum roller tips on the intake side this week with some stiffer valve springs to bring the lift up to .480 but still keep the power band nice and low.

[@drdjh2003]

@@jeremiahwasabullfrog8854 for a street car that you’re trying to build or you still run AC have you want low torque. I have a 350 L 31 from a 2000 van that is bone stock that swapped over to quadrajet in my 58 Chevy wagon. It runs great gets 20 to 22 mpg on the highway with a 700 R because it was a overdrive car. It had 370 gears in it so from stop like the stoplight it really moves. People are always surprised. I may do another one of these and put that summit cam in there put in a 55 Chevy.

[@ericlinder2623]

I have been looking at that cam for two engines. How do you like it?

[@jeremiahwasabullfrog8854]

It's not bad, I'm sure I could get better performance out of it, I put it in a 638 jasper hyd roller block that has "tbi" 193 heads under a tuned port intake. Was all kinds of cruddy cracked vacuum lines and problems with the car when i got it. Original manifolds and cat and i deleted the emissions and put a holley stealth ram on it. I think theres another 30hp hinding in there. Runs a little better than a stock '87 how it is but cam wise, it think it's a good mild almost stock idling cam, comparable to a factory lt1 or lt4 cam not the hot cam. 1.6 rockers would make it .480 lift

[@ericlinder2623]

@@jeremiahwasabullfrog8854 Thanks. I am building two vortec truck blocks one for my Burban and one for my 98 2500. It sounds like it would be perfect to wake them up a little.

[@jeremiahwasabullfrog8854]

@@ericlinder2623 should be good with some vortecs just make sure your valve seal to spring retainer clearance is good. I know with the swirlports I'm gettin close so when I put some stiffer springs in I'm going also install +.050 valve keepers and .060 spring shims.

[@mikef7968]

Was you able to use the stock length push rods? Have enjoyed watching this build👍

[@jeremiahwasabullfrog8854]

The motor in the car was a fairly fresh jasper hydraulic full roller 355 block so i was able to use the stock pusrods and lifters. I put some comp 1.52 magnum roller tip rockers in it. I have a valve spring and seal kit and +.050 valve keepers so I can go with 1.6 rockers. It has 193 tbi heads so I need the +.050 valve retainers and some .060 valve seat shims to bring the spring up higher because retainer to valve guide clearance is getting close at my current total lift of .456 A 1.6 ratio wil bring it to .480 lift.

[@mikef7968]

Thanks. Building something similar for a 87 Pontiac grand prix. Thanks for the reply . Looking forward to more videos.

[@jeremiahwasabullfrog8854]

@@mikef7968 yeah idk what motor you got but mine is a 638 casting with factory hydraulic roller setup with the 193 tbi heads which are not the 083 heads that iroc's came with. They're actually good flowing on the exhaust side. If you have an 87 it's likely a roller motor. If it's a 305 you probably got 187 casting heads and if it's a 350 you probably got 193 heads. Gotta watch the valve guide to valve retainer clearance on those. They're good to about .450 lift. Im getting away with .456 but I'm putting in stiffer valve springs soon and raising them by using +.050 valve retainer from Summit and .060 valve seat shims for under the springs. Raises the spring and gives you an extra 1/20th inch to play with. Can safely use a .450 lift cam and 1.6 rockers for .480 lift total on tbi heads. I'm only planning on going 1.6 on the intake because the exhaust flows better than a lot of stock heads. I think the tbi heads are better than people think, they have good torque down low and need a good higher lift short duration lobed cam shaft to keep that torque down low where you want it. Barely did shit to this car, stock exhaust, supposedly shitty heads, small cam and it's a tick faster than stock already.

[@mikef7968]

I'm also building a 638 block. Bought a rotating assembly from local builder. Using the aluminum vortech china heads hooker exhaust manifolds duelplane intake 750 quadrajet. Engines 30. Over with flattop pistons. 2.1/4 duels with h pipe. 3:73 gear 8.8 mustang rear.Your build is similar to mine .I found your page when looking up builds with this cam. Let you know when I get it together. Thanks for the info.

[@jeremiahwasabullfrog8854]

@@mikef7968 nice. Let me know how those chinese vortecs work out. Vortecs are supposed to be good for like 35-40hp out of the box. If I ever get around to it I plan on putting a decent set of heads on mine with some good headers. My exhaust is 2.5" going to 3" from the cat back. I am trying to find a 3" mid pipe to go straight back from a set of headers to make a full 3" all the way back. I feel like my heads my manifolds and my Y pipe are whats hold the car back from making really good power. I thought I had 3.73 gears, turns out it's a factory gm 9 bolt 3.70 which is supposedly better than the 10 bolt and in Australia it's basically known as a Dana model. Took me a while to find that info.

[@jacobklinckhardt3113]

Do you happen to know what size adapters for those fuel lines by chance?

[@jeremiahwasabullfrog8854]

Ok, I believe I used used 3/8 to -8an for the in fuel in line and 5/16 to -8an for the return line.

[@jeremiahwasabullfrog8854]

Could use -6 an whatever works. Line in stock is 3/8 npt ? And return is 5/16 npt if i remember. I used a speed master fuel regulator www.summitracing.com/parts/sdm-pce139-1012 with an earl's performance gauge, a couple different 90 degree -8an fitting a 180° fitting after i moved the lines to the passengee side amd need a -6an to -8AN somewhere.

[@jacobklinckhardt3113]

Awesome thank you so much! I'm actually doing a carb swap, my factory tpi setup is toast so many leaks, and I can just tell it's simply not running right

[@jeremiahwasabullfrog8854]

@@jacobklinckhardt3113 I got mine a year and a half ago. Gotta go through all those vacuum lines and replace, they dry out and crack, leak, come loose. So many things can go wrong, iac valve, throttle position sensor, maf or map, etc.