Cams or 18K Turbo

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Dec 4, 2016, 11:10 AM

#16

LSs1Power

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Quote:

Originally Posted by e_kobz

I would just go with the 18k. IMO is the best bolt on Turbo option for a street car. Designed by FP and made by MHI. So you get a killer Turbo with OEM reliability. The only other bolt on Turbos I would suggest are the Garrett stuff.

Such as GTX3071R?

Which one would u go with?

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TrinEvoX (Apr 7, 2021)

Dec 4, 2016, 11:12 AM

#17

e_kobz

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Quote:

Originally Posted by LSs1Power

Such as GTX3071R?

Which one would u go with?

I have a 18k that will be going on soon. If I was to go with a Garrett turbo I'd get either a 3071 or a 3076

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Dec 4, 2016, 11:27 AM

#18

Noize

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Turbo all day. Not even a comparison.

The reason so many stock manifolds crack after turbo replacement, even stock frame appearing turbo replacement, is that people are too lazy and can't be bothered to put all the bolts back to support everything properly.

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Dec 4, 2016, 12:05 PM

#19

Gtizks

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i would wait and do both together. do the head right the first time and get s2's, and something larger than a 18k.

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Dec 4, 2016, 12:06 PM

#20

Gtizks

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and a gtx3576 / 82 if you're sticking with stock frame.

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Dec 4, 2016, 12:18 PM

#21

LSs1Power

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Quote:

Originally Posted by Gtizks

and a gtx3576 / 82 if you're sticking with stock frame.

Isnt that a laggy option?

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Dec 5, 2016, 08:42 AM

#22

LetsGetThisDone

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Quote:

Originally Posted by LSs1Power

How does the S1 compared to the Cosworth XM1 or Kelford S1?

I don't know about the cosworth because they post real numbers for duration, only advertised. The Kelford A's are small, even compared to S1's.

Quote:

Originally Posted by LSs1Power

After reading alot more in the forum, i think i should go with a Turbo upgrade and keep the stock cams for much better gains.
Now which turbo to go with is another research topic, but 18k and green are on the top of my list for fast spooling turbo that are direct replacement. I still want to use my Akravopic downpipe.

Any other turbo that competes with these two please tell me so i can research them further.

MHI 18k all the way. OEM reliability, and same compressor as the green. It uses a larger MHI turbine, and it spools VERY close to stock. Capable of 475-500whp on E85 with cams.

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Dec 5, 2016, 03:16 PM

#23

moparfan

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I just bought one.

If I do nothing but swap the turbo, MAP exhaust manifold, and 3-port what do you think I might get on 93 pump gas?

Last edited by moparfan; Dec 5, 2016 at 03:24 PM.

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Dec 5, 2016, 03:25 PM

#24

The_X_Effect

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Quote:

Originally Posted by moparfan

I just bought one.

If I do nothing but swap the turbo, MAP exhaust manifold, and 3-port what do you think I might get on 93 pump gas?

400ish (assuming u have supporting bolt ons). Cams and e85 like the guy above 475-500 easily

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Dec 7, 2016, 12:45 PM

#25

32rulz

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i say do both and get dyno tuned

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Dec 7, 2016, 01:22 PM

#26

run1206

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Evo X Cams

I think i got this picture from EvoXForums (can't remember). I also was curious about the GSC 1/2 vs Mx1 with the MHI 18K setup.

I remember razorlab mentioning something about a billet housing if you upgrade the cams. (https://www.evolutionm.net/forums/ev...l#post11680448)

Billet Housing: https://www.driven-fabrication.com/p...-mivec-housing

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Dec 7, 2016, 01:53 PM

#27

LetsGetThisDone

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That billet housing is if get something like the S2. But all it does is mask the true issue which is that the exhaust MIVEC doesn't get enough oil, and lets the phaser bang around inside itself, which is what breaks the housing when you get big cams/stiff springs/high revs.

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Dec 7, 2016, 06:12 PM

#28

moparfan

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Due to the area I live, with road blocks and mobile test vans, I want to stay emissions compliant.

My thought is I would just keep the stock exhaust and do the best I can within that restriction.

Ideas for the best I can do within that big caveat?

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