416 with twins?
12-11-2014, 01:03 PM
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416 with twins? I recently broke a crank on my car that cost me the block so I just bought a new LS3 block and was considering doing a stroker while I was at it. I have twin 67mm turbo's and was wondering if anyone was running a similar setup and what stroker kit they went with. Previously had a 6.2 stock cube and was making a little over 900rwhp @ 17psi Trying to figure out what size exhaust housings I have right now but I'm thinking they are .61 or .70 what size housing would be good for the 416?
12-11-2014, 02:36 PM
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What turbine wheels ? T3 or T4 housings ?
What crank was it ?
If you were happy with spool before and have no need for more low rpm torque, then I wouldnt bother with the stroker.
What crank was it ?
If you were happy with spool before and have no need for more low rpm torque, then I wouldnt bother with the stroker.
12-11-2014, 03:08 PM
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It's a T4 housing and just found out the are .61, On the dyno at 5700rpm the power would fall off so I'm trying to prevent that and would like to make a little more power. It was a LSA crank
12-12-2014, 12:17 AM
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Isnt the LSA a forged crank ? Strange it should break ?
What camshaft were you using ?
Cam, tuning, turbos, etc etc they'd all play a role with rpm's available. High backpressure on it's own isnt always a cause.
That said, the housing does sound on the small side.
Through lack of choice I've 0.88 housings on mine, but they spool well and seem to work. It would be nice to try larger though. Anything lower just sounds very very small. Although I guess it's also relative to compressor size.
What 67mm wheels are they ?
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12-12-2014, 11:46 AM
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Isnt the LSA a forged crank ? Strange it should break ?
What camshaft were you using ?
Cam, tuning, turbos, etc etc they'd all play a role with rpm's available. High backpressure on it's own isnt always a cause.
That said, the housing does sound on the small side.
Through lack of choice I've 0.88 housings on mine, but they spool well and seem to work. It would be nice to try larger though. Anything lower just sounds very very small. Although I guess it's also relative to compressor size.
What 67mm wheels are they ?
What camshaft were you using ?
Cam, tuning, turbos, etc etc they'd all play a role with rpm's available. High backpressure on it's own isnt always a cause.
That said, the housing does sound on the small side.
Through lack of choice I've 0.88 housings on mine, but they spool well and seem to work. It would be nice to try larger though. Anything lower just sounds very very small. Although I guess it's also relative to compressor size.
What 67mm wheels are they ?
223/223 .625/.625 114
12-13-2014, 05:33 AM
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Yeah that's what I think. Of course gm won't take responsibility. I decided to return my ls3 block in exchange for an lsx block, is there anything different that I need to change. Or is it a direct replacement block?
12-13-2014, 07:26 AM
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TBH certainly this part of the world, there would never be any warranty on performance parts, especially given the wide range of applications they would be used for. Even with a manufacturers defect, but I'd still say in that case it should be a very good argument.
I've never used an LSx block, I'd never want the weight penalty. But pretty sure there are quite a few install differences between it and the other factory blocks.
So no it isnt a total direct replacement.
I've never used an LSx block, I'd never want the weight penalty. But pretty sure there are quite a few install differences between it and the other factory blocks.
So no it isnt a total direct replacement.
12-13-2014, 08:18 AM
#15
the lsx block uses a unique rear cover and cam retainer plate but they come with it.
Its does not have the rear cam sensor hole either so you have to use a gen4 front cover and valley cover, but if you had a ls3 those will work just not the early gen3 stuff.
Obviously it also has unique head gaskets and bolts/studs. But everything else is the same.
Its does not have the rear cam sensor hole either so you have to use a gen4 front cover and valley cover, but if you had a ls3 those will work just not the early gen3 stuff.
Obviously it also has unique head gaskets and bolts/studs. But everything else is the same.
12-13-2014, 11:42 AM
#20
I take the lsx any day of the week once you see it sitting next to a production block.
As Sam said they are as close to drop in as they come. There is absolutely no comparison to decks and cylinder heft on a gen2 block compared to an OEM block
Not to mention the oiling.
As Sam said they are as close to drop in as they come. There is absolutely no comparison to decks and cylinder heft on a gen2 block compared to an OEM block
Not to mention the oiling.
Last edited by rotary1307cc; 12-13-2014 at 11:51 AM.