high compression plus boost

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Mar 6, 2013 | 06:28 PM

sixt5

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high compression plus boost

im running lq9 with l92 heads. i believe the CR is around 10.5 to 11:1. is this going to be an issue when i throw a turbo on?

Mar 6, 2013 | 06:40 PM

silver_82

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From: Ft. Wayne

What type of fuel and intercooler? Those are my main concerns

It can be done without problems as long as the combo is designed properly.

Issues can arrise when you want to run pump gas, a lot of boost, have improper tune, subpar fuel setup. Ect ect.

Lots of people have sucess boosting stock ls2's & 3's though.

Mar 6, 2013 | 08:12 PM

koolrayz

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From: mansfield ohio

also a big cam to knock the dcr down

Mar 6, 2013 | 08:52 PM

Wicked69

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What is considered a big cam on an 10.5 cmprssn? 224/230 .581/.588 114? Is that considered big or small?

Mar 7, 2013 | 06:45 AM

koolrayz

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From: mansfield ohio

Quote:

Originally Posted by Wicked69

What is considered a big cam on an 10.5 cmprssn? 224/230 .581/.588 114? Is that considered big or small?

I knew after I typed that that I shot myself in the foot LOL
What I meant by big was bigger than I would normaly use in the aplication. Motor size, turbo size, compression and goals for the combination are some of the main determining factors in cam "size"

To answer your cam question You would need to know all of the above stated information.

Mar 7, 2013 | 08:27 AM

sixt5

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Running pump gad and I have access to a great tuner. I will be running a intercooler. Cam is 224 236 598 601 113+2.

Havent planned a fuel system yet

Mar 8, 2013 | 03:20 AM

Wicked69

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Quote:

Originally Posted by koolrayz

Yeah, I jumped on that one. I just swapped to an LQ4 and instead of using the 317 heads I kept my 862's on. Figured it would put the compression around 10.5. I am running twin 70's. The car is street driven and ran hard at the track. My street driving is limited to mostly local driving. Every once in a great while I will make a 3 hr drive. I run E85 also.

Thanks. I figured my cam was just about right for the 6.0 and was probably a little on the big size for my 5.3.