AGearHead4Life

iTrader: (5)

Ebay special. I'mma believe in them after watching Denmah (aka Matt Happel) boost on these studs. This build doesnt need studs, but I think they a better choice over stock bolts. They cost only about $10 more, are stronger and can be reused.

Mark Johnson

iTrader: (1)

Cool beans. Not meaning to throw a wrench into the conversation, just an honest question, with that kind of a bump in compression~ wouldn't you be forced to run premium?

AGearHead4Life

iTrader: (5)

Nah, thats a great question. You might would have to run premium. I would imagine that you may be able to tune around to use a lesser octane but would defeat the purpose probably. IDK If you wanted to run regular gas, it may be wise to go with about 10:1 CR. I would think that how well it runs on which gas will depend on how agressive the tune is on the timming.

I like to run premium in my vehicles any way. Last time i calcualted it, it was about $2-$3 more a tank to fill with premium. To me it was work it. I get more power, a lil more MPG and a better smelling exhauast.

But! I do plan to test the limits and see how it runs with regular in it once its in the truck.

AGearHead4Life

iTrader: (5)

Got the 5.3 with 4.8 flat top pistons, TSP 220r cam and ported heads running on the engine stand last night. Sounds good! Check it out!

http://youtu.be/VogkaVNGkCU

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AGearHead4Life

iTrader: (5)

Here's a pic of the engine on the stand right before it was cranked.

1FastBrick

iTrader: (17)

Oh damn! Looks like trouble waiting to happen!!!

FWIW I run my LQ9 on 87. I could get more aggressive with the timing and tuning with the 91 Octane we have in CA But It's so minimal to me that I decided to leave it alone. I'd rather save my 20-30 cents a gallon difference here.

AGearHead4Life

iTrader: (5)

lol yea, it does look like trouble. I seem to like to take chances or some may say that I like to learn the hard way. Its me thinking outside the box though. The stand seems to be pretty sturdy though. I've run three engines this way so far. When I did the first one I was intending on building it into a collapsable full running stand with radiator and all. The furthest I got on that is putting wooden blocks under the front of the pan for support. lol Guess I really need to make a support for the front at least.

Glad I ran it before install too. I noticed that my front seal is leaking pretty bad. I also got the chance to do a compression test last night. I've attached a pic of the results. I dont know what to say about number 6.

Is your LQ9 on a factory tune? and what is at 10:1?

1FastBrick

iTrader: (17)

Yes factory compression ratio and engine portion of the tune. Trans portion has been modified. Was planning some mods before I modified the engine portion.

Describe the Wet method you used please.

They dry numbers look good. Run it!!!

AGearHead4Life

iTrader: (5)

Well, its been a long time since i've done a wet compression test. I didnt have an oil gun, so I used WD40 :smb: . I sprayed it into the cylinder for 4 seconds, hooked up the tester and turned it over 5 rotations. Less then 4 seconds didnt change the compression. I retested a few of the cylinders a couple times to get the the seconds I sprayed into the cylinder.

AGearHead4Life

iTrader: (5)

I got a quick update video up on the '87 Chevy truck after the 5.3 swap from last weekend. Check out the link below. Its got a shaved truck intake, flat top 4.8 pistons, 220r cam, home ported heads with 2" LS1 valves and a 4l80e trans. More and better videos to come. Enjoy!
5.3 Swap Update! Its in and driving! '87 Chevy Truck - C10 R10 LS1 - YouTube


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