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VTEC Crossover on ls/vtec(gs-r) start point

Old 03-12-2006, 04:31 AM
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Default VTEC Crossover on ls/vtec(gs-r) start point

So I just got the ls/vtec up and done, and am just kinda playing a guessing game here with the vtec rpm settings.

Where is a good point to start with? For now its at 4800, I had a feeling that might be a little too soon, thoughts?

I know that the only real way to set it for optimal results is to get it on a dyno and dial it in proper, but thats not what I am asking nor what I am looking for. Just looking for opinions on the ideal "starting line" if you will.
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Old 03-12-2006, 04:35 AM
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Default Re: VTEC Crossover on ls/vtec(gs-r) start point

I always seem to like 5200 for a starting point. B16's (depending on cams of course) seem to like it a smidge higher. 5400-5500ish.
My GSR w/ ITR has a butter cross-over at 5338. My B16 liked 5500. A recent GSR (gsr cams and IM), was absolutley perfect at 5188.

If you're ---- and have the patience, tune the low cam out to 6k with a perfectly flat A/F, then do the same w/ the high cam starting at 4500. Look for when the fuel crosses and you'll have it. *** dyno seems to work just as good though.



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Old 03-12-2006, 04:38 AM
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Default Re: VTEC Crossover on ls/vtec(gs-r) start point

Originally Posted by leed
I always seem to like 5200 for a starting point. B16's (depending on cams of course) seem to like it a smidge higher. 5400-5500ish.
My GSR w/ ITR has a butter cross-over at 5338. My B16 liked 5500. A recent GSR (gsr cams and IM), was absolutley perfect at 5188.
gravy, i think ill bring it up a bit then.
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Old 03-12-2006, 04:40 AM
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Default Re: VTEC Crossover on ls/vtec(gs-r) start point

Wait, you mean you finally bucked up and put a real head on your LS? Sweet dude.

<--- waiting for JD to come in here w/ his stories about how LS heads dominate vtec heads when they have crower cams. hahah. I wanna see this LS/crower setup that beats the stock ITR dyno plot. Really, Im curious.

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Old 03-12-2006, 04:46 AM
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Default Re: VTEC Crossover on ls/vtec(gs-r) start point

Originally Posted by leed
Wait, you mean you finally bucked up and put a real head on your LS? Sweet dude.
Indeed I did, I traded a brand new XSPower turbo that I got for $20 (to cover shipping only) for a 95 GSR head and intake mani...and got it on friday night.

Pics n ---- here
https://www.homemadeturbo.com/forum/...?topic=58911.0
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Old 03-14-2006, 11:47 PM
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Default Re: VTEC Crossover on ls/vtec(gs-r) start point

I had my B16 at 5100, and my LS VTEC at the same, once I finish my new Turbo Setup I'm going to dyno it for the best results, but prolly 4800-5500 range
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Old 03-15-2006, 12:44 PM
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Default Re: VTEC Crossover on ls/vtec(gs-r) start point

I would say anywhere from 5000-5200 is a good place to start.
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