Why is a 5.3l w/317 a slug?
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What engine with 8.6:1 compression isnt a slug? People are under the impression that turbos need low compression. Probably true if you are trying to run 30psi on pump gas.. But if you had a turbo to achieve that and you are running a stock 5.3 odds are it would fly apart well before that...lol. So no need to lower the compression to prepare an engine for something it will never see. I did this also....it sucked. lol.
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An 8.5 5.3 without a turbo is like a 150-200 hp combo... so there's your sluggish right there.
Do you have data that says a lower static 5.3 with more pressure is more efficient then a 10:1 5.3 with a t76? What makes you think it will "pick up top end"?
Do you have data that says a lower static 5.3 with more pressure is more efficient then a 10:1 5.3 with a t76? What makes you think it will "pick up top end"?
) and only rated at 245hp in boost
Convertor stall
Rear end Ratio
Ar. of exhaust housing..
As previous owner of 2 turbo Regals, I beg to differ. They feel real sluggish when not under boost. Fortunately they spin up pretty quick.
I'm going with a ls6 cam w/317 heads, ls9 head gasket on a 347 with -2cc valve relief flat tops..
I would like 9.5 compression
Staging Lane
Joined: Aug 2008
Posts: 53
Likes: 0
From: FORT HOOD, TX
ok so let me see if i get this right... i got a 5.3l with 317 heads, ls6 cam, and flat pistons.. which should be 9.5:1 comp right?? should i swap into ls1 heads for better results or turning the boost up at lower rpms should even it out??
Actually I used the Ls1 bore for that. Your combo is
9.05 cr
6.75 dynamic cr
That is why they are such dogs. That is a 200whp at best N/A. I would run 241s myself over 317s which is
9.55 cr
7.15dcr
9.05 cr
6.75 dynamic cr
That is why they are such dogs. That is a 200whp at best N/A. I would run 241s myself over 317s which is
9.55 cr
7.15dcr
Grr, can you explain the dynamic CR and how you calculate the DCR and STR? Thanks
Also, I understand the significance of STR, but what is an ideal DCR for a street vehicle and how does that play into driving or response. Im sure Im not the only one who would find this info useful
Also, I understand the significance of STR, but what is an ideal DCR for a street vehicle and how does that play into driving or response. Im sure Im not the only one who would find this info useful
Last edited by o2camaross; Sep 11, 2012 at 12:06 AM.