LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Little Update

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Old 02-01-2012, 11:02 PM
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Ended up spending a little more time on the lifters that i planned, i have .017-.020" travel in all of them, ended up taking ~.140" of shims. Got one head mounted, measured pushrod length (7.150) and got pushrods ordered from smith bros. Only had to clearance the very top of the head, directly underneath the guideplates, for the 3/8" pushrods. Anyway i tore 3 teflon valve seals on the same valve before finally getting the right technique another set of 16 on order
Old 03-06-2012, 02:31 PM
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It lives! Got it registered w/ a sneaky emissions exemption and I've been driving it around for the last two weeks. I think the stealth ram and new cam are working just fine when it wants 15% fuel added above 3600 rpm over my old LT4 intake/244° cam tune Shimmed lifters really aren't too noisy, but more so than the usual RR noise. Idles at 980 in gear at ~83kpa with 33° timing.
Old 03-06-2012, 05:26 PM
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Originally Posted by Wicked94Z
It lives! Got it registered w/ a sneaky emissions exemption and I've been driving it around for the last two weeks. I think the stealth ram and new cam are working just fine when it wants 15% fuel added above 3600 rpm over my old LT4 intake/244° cam tune Shimmed lifters really aren't too noisy, but more so than the usual RR noise. Idles at 980 in gear at ~83kpa with 33° timing.
Badass, can't wait to see a vid.
Old 03-07-2012, 05:51 AM
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Went for a drive tonight to do some WOT logging, first hit it breaks up BAD at 4000 or so. New set of MSDs on order, had a junk set of 7mm autozone wires on it, 7mm coil wire is about 3' long which isn't helping either. Got a billet head bracket for the HVC II coil to use a regular 10" coil wire with probably 1/100 the resistance. Haven't had an EMI issue with the DFI under the dash so this should help. Putting a -7 plug back in it for NA tuning, I'll get another set of -9s for the citrus hits
Old 03-07-2012, 06:10 AM
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Here's the thermal dispersant coating on the exterior of the HSR. underside, gasket surfaces, and runners have the greenish/gold thermal barrier. Base and plenum measure less than 100 degrees after a long drive!!
Also the Z in it's new home, put outlets everywhere and a 6 ga 220v as well. just insulated and drywalled it today


Old 03-07-2012, 12:46 PM
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Originally Posted by Wicked94Z
Here's the thermal dispersant coating on the exterior of the HSR. underside, gasket surfaces, and runners have the greenish/gold thermal barrier. Base and plenum measure less than 100 degrees after a long drive!!
Also the Z in it's new home, put outlets everywhere and a 6 ga 220v as well. just insulated and drywalled it today


My stock intake manifold is cool to the touch after a long drive. It only heat soaks after it sits.
Old 03-07-2012, 04:33 PM
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that's nice for your stock shortblock motor, but i run high oil/water temps and cruise over 3000 rpm with a filled block. This is a night and day difference on my motor
Old 03-07-2012, 08:01 PM
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Sounds good wicked, congrats! What plug gap are you running with the corn? Any ignition mods besides the HVC2 and 3 mile coil wire?
Old 03-07-2012, 08:18 PM
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My garage is in the same condition, just needs finishing touches that I haven't decided on yet. Yet, another sharp teal/black Z

Any vids yet?
Old 03-07-2012, 11:16 PM
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Originally Posted by 05HD
Sounds good wicked, congrats! What plug gap are you running with the corn? Any ignition mods besides the HVC2 and 3 mile coil wire?
Its at .034" right now, might go down to .028. I've heard some go down to .020 and pick up on NA BBCs with digital 7 boxes. I have a little 6A

Originally Posted by flyinZ
M garage is in the same condition, just needs finishing touches that I haven't decided on yet. Yet, another sharp teal/black Z

Any vids yet?
I'll get vids hopefully Friday if my parts show up. Yea my parents have a big fully insulated garage and it stayed 45+ all winter with no heat. I have an A/C unit sitting here for this summer, gonna blow in 16" of insulation above the garage as well. Just did the garage door (west facing) today with 1.5" foam panels and that seems like it made a big difference. It's still low-mid 20s at night right now.
Old 03-08-2012, 06:24 AM
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P-47 on the workbench!
Old 03-08-2012, 07:31 AM
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Originally Posted by Wicked94Z
Its at .034" right now, might go down to .028. I've heard some go down to .020 and pick up on NA BBCs with digital 7 boxes. I have a little 6A



I'll get vids hopefully Friday if my parts show up. Yea my parents have a big fully insulated garage and it stayed 45+ all winter with no heat. I have an A/C unit sitting here for this summer, gonna blow in 16" of insulation above the garage as well. Just did the garage door (west facing) today with 1.5" foam panels and that seems like it made a big difference. It's still low-mid 20s at night right now.
on race gas (yes i know its a totally different animal lol) i found gains from a stronger ignition box (MSD7AL2) and opening up my gap to .032 on a high compression NA motor on 114 octane VP....
Old 03-08-2012, 01:09 PM
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Good input thanks. I'm around 13.2 compression now but with all the fuel and poopy plug wires i think there's power there.

Its a P-40! It's my little grab n go park flyer when its not too windy
Old 03-09-2012, 08:33 PM
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How thick are you intake bolt shims and what degree are thy I need to make some for my intake
Old 03-12-2012, 06:06 AM
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no idea off the top of my head, but i can get you some measurements and you can dust off your geometry skills!

On a side note, misfire is gone after coil relocation and new fancy plug wires. Old 7mm coil wire had over 4.3k ohms resistance new one has about 90 Pulls strong up to 7400, 1-2 shift dropped 7400 -> 6050, but only have 30° of timing in it so it could be down 30-40 ft-lbs there. Still running it rich (safe) which would show even more losses with retarded timing. If its not raining/snowing tomorrow I'll get vids
Old 03-12-2012, 10:47 AM
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Awesome news. Glad to hear its back up and still doing well
Old 03-12-2012, 11:15 AM
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Glad to see its back running.

I still see the opti is being used, what computer are you running?
Old 03-12-2012, 11:05 PM
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I'll take what ever help I can get to making this intake easier to modify
Old 03-13-2012, 01:38 PM
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I'm anxious to see how the thing does, do youhave some pictures of where all the intake came close to the firewall and overhang? (needing massaging)
Old 03-13-2012, 03:29 PM
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the cowl overhang is cut back to the windshield on the top, and cut back to the firewall on bottom. you can see the unfinished passenger side cut in the intake picture. notice i left the holes to attach the plastic cowl cover with the push connectors. i didn't cut the plastic, it just has a little bump over the plenum. can't tell its been cut with the hood closed.

Sorry guys crank trigger pickup took a **** yesterday, started it up to take it for a spin and it died right away. 73 bucks, didn't even last a year I guess MSD had a bad run a year or two ago, hopefully they'll send me one free of charge. New unit from summit is on the way...

edit: using DFI w/ crank trigger and 1x cam sync inside opti. still running in batch to get the tune close, then will switch to sequential and mess with injector timing and individual cyl trims on the dyno.

Last edited by Wicked94Z; 03-13-2012 at 03:34 PM.


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