Ls next 390 cube solid roller
08-29-2015, 01:46 AM
#1
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Ls next 390 cube solid roller Hi I'm from australia just sharing my new combo I'm building atm
Looking for some opinions on the setup and if you think I should change anything
Ls next block 4.140 bore
Lsa forged crank 3.622
Manley severe duty h beams 2000 rod bolts
Je fsr 14.5:1 pistons
H series coated bearings throughout
Adjustable timing chain setup
Manley pro flo oil pump
Innovations west billet balancer
Solid roller cam in the 270@50 range
790 lift
T&d rocker setup
Profiler 235cc full ported cathedral heads with matching holley hi ram with twin 950 quickfuel carbs
Msd ls7 converter box and accel coils
Moroso sump setup to suit ls next
Hoping for good numbers
Anyone recommend I change anything
Looking for some opinions on the setup and if you think I should change anything
Ls next block 4.140 bore
Lsa forged crank 3.622
Manley severe duty h beams 2000 rod bolts
Je fsr 14.5:1 pistons
H series coated bearings throughout
Adjustable timing chain setup
Manley pro flo oil pump
Innovations west billet balancer
Solid roller cam in the 270@50 range
790 lift
T&d rocker setup
Profiler 235cc full ported cathedral heads with matching holley hi ram with twin 950 quickfuel carbs
Msd ls7 converter box and accel coils
Moroso sump setup to suit ls next
Hoping for good numbers
Anyone recommend I change anything
08-29-2015, 09:19 AM
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The heads were originally for a different setup
Rather then sell I reworked them
But have been massively worked and flow big numbers
370cfm with a 2.100 intake valve
A lot of people under estimate cathedrals
The rectangle heads are good but I want to do something different
Rather then sell I reworked them
But have been massively worked and flow big numbers
370cfm with a 2.100 intake valve
A lot of people under estimate cathedrals
The rectangle heads are good but I want to do something different
08-29-2015, 09:33 AM
#6
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The heads were originally for a different setup
Rather then sell I reworked them
But have been massively worked and flow big numbers
370cfm with a 2.100 intake valve
A lot of people under estimate cathedrals
The rectangle heads are good but I want to do something different
Rather then sell I reworked them
But have been massively worked and flow big numbers
370cfm with a 2.100 intake valve
A lot of people under estimate cathedrals
The rectangle heads are good but I want to do something different
08-29-2015, 09:42 AM
#7
I dunno where the heads stall at for lift, but I'd be thinking more like a 288/300 with lift a touch past max flow, whatever that is, and hold that valve there for as long as possible. You have a short enough stroke so a 60mm cam core will fit I would put one in it and a bushed lifter as well, 903 min 937 would be better. May want to think about a center counterweight crank rather than a stock piece just because if you spin this where it will likely want to be its gonna benefit from that, with a lot less deflection.
And compression, if you could manage any more than 14.5 I would.
True n/a motor is gonna want to spin rom, have a huge fan that's not valvetrain friendly (a lot of maintenance). But the guys that like n/a racing love that stuff
And compression, if you could manage any more than 14.5 I would.
True n/a motor is gonna want to spin rom, have a huge fan that's not valvetrain friendly (a lot of maintenance). But the guys that like n/a racing love that stuff
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08-29-2015, 09:53 AM
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Cheers mate
Thinking around 7800-8000rpm
Gonna kill valve springs a lot but it's not a motor il race constantly
More for events and to advertise my performance motors
Still nutting out cam specs abit torn in different directions atm
Will keep working on it though
Thinking around 7800-8000rpm
Gonna kill valve springs a lot but it's not a motor il race constantly
More for events and to advertise my performance motors
Still nutting out cam specs abit torn in different directions atm
Will keep working on it though
08-31-2015, 07:47 AM
#15
No idea I just know everyone I know running a fast, bs3, grid, etc have had to go this route because the factory reluctor wheels are problematic with rpm over 7200... Soon as you get to that point you have to do something, or have a lot of headaches.
08-31-2015, 09:57 PM
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08-31-2015, 10:17 PM
#18
Stock reluctor seems to be problematic in these applications from my experience.
Stock computer as well, MSD probably helps with that a lot but I still, on a build I was planning on twisting to 8000, would just put an MSD crank trigger on the front of it. Save the possible issue, the cost isn't that high. Damage from the issue, could be.
Stock computer as well, MSD probably helps with that a lot but I still, on a build I was planning on twisting to 8000, would just put an MSD crank trigger on the front of it. Save the possible issue, the cost isn't that high. Damage from the issue, could be.
09-01-2015, 09:46 AM
#20
A good set of Cathedral ports with some area at the pushrod ,and a big enough bowl,with a 2.100 valve in conjunction with a 270-ish intake lobe can make 800 hp if everything else is spot on
Some more stroke would have been nice,but overall sounds like a good build up
Good luck
As for a Msd not wanting to work over 8000rpm,some folks need to get out more
Some more stroke would have been nice,but overall sounds like a good build up
Good luck
As for a Msd not wanting to work over 8000rpm,some folks need to get out more