LMM: danville 67mm stg2 or 72mm stg2

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CRAWLEN

Member
Sep 29, 2017
134
1
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Hi guys, im having an issue and cant make up my mind on what size turbo to run.
So run down of what the lmm is currently getting built with.
Durastar crank
Carrilo rods
Mahle race cast pistons
All h series bearings
Arp main studs
Just standard arp head studs ( i belive these will be fine for the max effort 800hp)
100% sticks
12mm cp3.
Lift pump
And built trans.


So my goal is to make 750-800 hp on a max effort tune but reliable. And daily say at 600 hp.

It will be used for daily driving,towing,4wding and racing. So what turbo out of the 2 would be the perfect match.


Also been thinking in the future about twins if i was to go the 67mm would that be fine in a twin set up
 
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Blackmax123

Member
Aug 2, 2014
683
1
18
central Pennsylvania
Just contact Mark. He will consider all your needs and tell you what's gonna be best for you.

The 72 can be used in a twin setup too. I believe there is a few guys on here running them.
 
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CRAWLEN

Member
Sep 29, 2017
134
1
16
Yeah I will do, just I ddint want to annoy him to much as I asked a while ago before I planned on building the engine. But after doing some reading on here the 67mm might be perfect. And if I ever want more I could twin it
 
duramaxzak

duramaxzak

Wanna be puller!
Nov 22, 2008
2,431
14
38
Minnesota
Danville makes a few different 68 VGT's, I think one of the 68's would be your best choice and meet your HP goal's. Also have Mark tune it!
 
Chevy1925

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
21,670
5,818
113
Phoenix Az
Last I knew, Mark won’t sell the 72 stg2r unless you plan to put a big turbo over it. It doesn’t shine or improve that much over the 68 until it’s twinned
 
Rancelot211

Rancelot211

Boyd
Jan 28, 2015
961
0
0
Ohio
My lmm made 628 1237 on a 68mm stg2r on stock fuel. You should be able to meet your goals with it but i second asking mark
 
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CRAWLEN

Member
Sep 29, 2017
134
1
16
Cleared everything for me, the 67mm looks like the winner. And the man him self has spoken. 68mm first then possibly find it self a mate later one cheers everyone made my decision alot easier
 
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CRAWLEN

Member
Sep 29, 2017
134
1
16
While we are hear talking about the turbo. You guys might be able to help answer this for me. So the arp headstuds I'm going to use are just the standard ones. That should be plenty for the 68mm by it self hey ? If I was to twin the 68, would I need to go the custom series of headstuds I'm just concerned as I cant tins **** all info as to what the standard and the custom series can hold.
This engine will be running at 16.5cr as well any info is much appreciated
 
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CRAWLEN

Member
Sep 29, 2017
134
1
16
torqued2dmax said:
They make 3 grades , in my opinion you would be wise to at least run the second grade , some might say to run the strongest , it you can swing it !
Click to expand...


Yeah right I didn't know there was 3 grades I thought there was 2 the ones I got that are pn:230-4201 and the age ones I might sell the ones I have now and get age ones for a bit of security I'm spending this much money building it might aswell do it right
 
torqued2dmax

torqued2dmax

Member
Mar 26, 2017
646
1
18
Brookville, PA
I would like your opinion , if you were only going to do one or the other , the price difference between having block or heads fire ringed or going with ca 625 studs , do you feel you get more bang for the buck and good holding till say 1000 rwhp . Your opinion is very helpful , thanks !
 
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